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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of November, 2025.
 
Commission File Number: 001-40530

GH Research PLC
(Exact name of registrant as specified in its charter)

Joshua Dawson House
Dawson Street
Dublin 2
D02 RY95
Ireland
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:


Form 20-F

Form 40-F




INFORMATION CONTAINED IN THIS REPORT ON FORM 6-K


On November 6, 2025, GH Research PLC (the “Company”) reported its third quarter 2025 financial results, provided business updates, and made available an updated investor presentation on its website. A copy of the press release is exhibited hereto as Exhibit 99.3 and a copy of the investor presentation is attached hereto as Exhibit 99.4.

The fact that this press release and the investor presentation is being made available and furnished herewith should not be deemed an admission as to the materiality of any information contained in the materials. The information contained in the press release and investor presentation is being provided as of November 6, 2025, and the Company does not undertake any obligation to update the press release or the presentation in the future or to update forward-looking statements to reflect subsequent actual results.
1
INCORPORATION BY REFERENCE

This Report on Form 6-K (other than Exhibit 99.3 and Exhibit 99.4 hereto), including Exhibit 99.1 and Exhibit 99.2 hereto, shall be deemed to be incorporated by reference into the registration statement on Form S-8 (Registration Nos. 333-270422 and 333-285311) and the registration statement on Form F-3 (Registration No. 333-285310) of the Company and to be a part thereof from the date on which this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.
 
2
EXHIBIT INDEX

Exhibit No.
Description
Unaudited Condensed Consolidated Interim Financial Statements for the three and nine months ended September 30, 2025
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Press release dated November 6, 2025
99.4
Corporate Presentation for November 2025
101.INS
Inline XBRL Instance Document
101.SCH
Inline XBRL Taxonomy Extension Schema Document
101.CAL
Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF
Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB
Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE
Inline XBRL Taxonomy Extension Presentation Linkbase Document
104
Cover Page Interactive Data File (embedded within the Inline XBRL document)

3
SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
 
GH Research PLC
Date: November 6, 2025
 
   
 
By:
/s/ Julie Ryan
 
Name:
Julie Ryan
 
Title:
Vice President, Finance


4


Exhibit 99.1


graphic
GH RESEARCH PLC

Unaudited condensed consolidated interim statement of comprehensive loss

         
Three months ended
September 30,
   
Nine months ended
September 30,
 
         
2025
   
2024
    2025     2024  
    Note     $’000     $’000     $’000     $’000  
Operating expenses
                                     
Research and development
  3      
(10,567
)
   
(8,397
)
    (27,377 )     (26,810 )
General and administration
  3      
(5,998
)
   
(4,224
)
    (16,624 )     (10,558 )
Loss from operations
           
(16,565
)
   
(12,621
)
    (44,001 )     (37,368 )
                                         
Finance income
 
4
     
2,783
     
2,535
      8,616       7,760  
Finance expense
 
4
     
(21
)
   
(181
)
    (373 )     (538 )
Movement of expected credit loss
           
30
     
(2
)
    24       45  
Foreign exchange (loss)/gain
           
(247
)
   
(1,845
)
    1,613       (58 )
Total other income
           
2,545
     
507
      9,880       7,209  
                                         
Loss before tax
           
(14,020
)
   
(12,114
)
    (34,121 )     (30,159 )
Tax charge/(credit)
           
-
     
-
      -       -  
Loss for the period
           
(14,020
)
   
(12,114
)
    (34,121 )     (30,159 )
                                         
Other comprehensive (expense)/income                                        
Items that may be reclassified to profit or loss
                                       
Fair value movement on marketable securities
           
(33
)
   
908
      (55 )     258  
Currency translation adjustment
           
(63
)
   
1,622
      926       (113 )
Total comprehensive loss for the period
           
(14,116
)
   
(9,584
)
    (33,250 )     (30,014 )
                                         
Attributable to owners:
                                       
Loss for the period
           
(14,020
)
   
(12,114
)
    (34,121 )     (30,159 )
Total comprehensive loss for the period
           
(14,116
)
   
(9,584
)
    (33,250 )     (30,014 )
                                         
Loss per share
                                       
Basic and diluted loss per share (in USD)
 
15
     
(0.23
)
   
(0.23
)
    (0.56 )     (0.58 )

 
The accompanying notes are an integral part of these unaudited condensed consolidated interim financial statements.

1
graphic
GH RESEARCH PLC

Unaudited condensed consolidated interim statement of financial position
 

       
At September 30,
   
At December 31,
 
         
2025
   
2024
 
    Note    
$’000
   
$’000
 
ASSETS
                       
Current assets
                       
Cash and cash equivalents
 
5
     
249,654
     
100,791
 
Other financial assets
  5      
-
     
19,387
 
Marketable securities
 
6
     
38,853
     
29,146
 
Other current assets
 
7
     
6,283
     
4,901
 
Total current assets
           
294,790
     
154,225
 
Non-current assets
                       
Marketable securities
 
6
     
5,378
     
33,300
 
Property, plant and equipment
           
692
     
748
 
Other non-current assets
  8
      1,162       -  
Total non-current assets
           
7,232
     
34,048
 
Total assets
           
302,022
     
188,273
 
                         
LIABILITIES AND EQUITY
                       
Current liabilities
                       
Trade payables
 
9
     
3,837
     
3,741
 
Lease liability
           
365
     
255
 
Other current liabilities
  10
     
6,206
     
4,957
 
Total current liabilities
           
10,408
     
8,953
 
Non-current liabilities
                       
Lease liability
           
217
     
369
 
Total non-current liabilities
           
217
     
369
 
Total liabilities
           
10,625
     
9,322
 
                         
Equity attributable to owners
                       
Share capital
           
1,551
     
1,301
 
Additional paid-in capital
           
431,061
     
291,463
 
Other reserves
           
10,708
     
5,194
 
Foreign currency translation reserve
           
(11,635
)
   
(12,561
)
Accumulated deficit
           
(140,288
)
   
(106,446
)
Total equity
           
291,397
     
178,951
 
Total liabilities and equity
           
302,022
     
188,273
 

 
The accompanying notes are an integral part of these unaudited condensed consolidated interim financial statements.

2
graphic
GH RESEARCH PLC

Unaudited condensed consolidated interim statement of changes in equity
 

 
Attributable to owners
 

 
Share capital
   
Additional
paid-in
capital
   
Other
reserves
   
Foreign
currency
translation
reserve
   
Accumulated
deficit
   
Total
 
   
$’000
   
$’000
   
$’000
   
$’000
   
$’000
   
$’000
 
At January 1, 2024
   
1,301
     
291,463
     
4,651
     
(10,507
)
   
(67,940
)
   
218,968
 
Loss for the period
   
-
     
-
     
-
     
-
     
(30,159
)
   
(30,159
)
Other comprehensive income/(expense)
   
-
     
-
     
258
   
(113
)
   
-
     
145
Total comprehensive loss for the period
   
-
     
-
     
258
   
(113
)
   
(30,159
)
   
(30,014
)
Share-based compensation expense
   
-
     
-
     
412
     
-
     
-
     
412
 
Transfer of share options
    -       -       (455 )     -       455       -  
Total transactions with owners
   
-
     
-
     
(43
)
   
-
     
455
     
412
 
At September 30, 2024
   
1,301
     
291,463
     
4,866
     
(10,620
)
   
(97,644
)
   
189,366
 
                                                 
At January 1, 2025
   
1,301
     
291,463
     
5,194
     
(12,561
)
   
(106,446
)
   
178,951
 
Loss for the period
   
-
     
-
     
-
     
-
     
(34,121
)
   
(34,121
)
Other comprehensive (expense)/income
   
-
     
-
     
(55
)
   
926
     
-
     
871
 
Total comprehensive loss for the period
   
-
     
-
     
(55
)
   
926
     
(34,121
)
   
(33,250
)
Share-based compensation expense
   
-
     
-
     
5,848
     
-
     
-
     
5,848
 
Transfer of share options
    -       -       (269 )     -       269       -  
Share option exercises
    -       -       (10 )     -       10       -  
Issue of share capital
    250       139,598       -       -       -       139,848  
Total transactions with owners
   
250
     
139,598
     
5,569
     
-
     
279
     
145,696
 
At September 30, 2025
   
1,551
     
431,061
     
10,708
     
(11,635
)
   
(140,288
)
   
291,397
 

 
The accompanying notes are an integral part of these unaudited condensed consolidated interim financial statements.

3
graphic
GH RESEARCH PLC

Unaudited condensed consolidated interim statement of cash flows
 
   
Nine months ended
September 30,
 
   
2025
   
2024
 
   
$’000
   
$’000
 
Cash flows from operating activities
               
Loss for the period
   
(34,121
)
   
(30,159
)
Depreciation
   
247
     
237
 
Share-based compensation expense
   
5,848
     
412
 
Finance income
   
(8,616
)
   
(7,760
)
Finance expense
   
373
     
538
 
Movement of expected credit loss
   
(24
)
   
(45
)
Foreign exchange (gain)/loss
   
(1,613
)
   
58
 
Movement in working capital
   
(1,533
)
   
812
 
Cash flows used in operating activities
   
(39,439
)
   
(35,907
)
Finance expense paid
   
(460
)
   
(700
)
Finance income received
   
8,677
     
4,768
 
Net cash used in operating activities
   
(31,222
)
   
(31,839
)
                 
Cash flows from investing activities
               
Purchase of property, plant and equipment
   
(102
)
   
(24
)
Proceeds from sale of other financial assets
    19,585       25,000  
Proceeds from redemptions and disposals of marketable securities
    17,849       18,828  
Cash flows from investing activities
   
37,332
     
43,804
 
                 
Cash flows from financing activities
               
Payment of lease liability
   
(129
)
   
(245
)
Proceeds from equity public offering
    150,000       -  
Transaction costs from equity public offering
    (10,152 )     -  
Net cash flows from/(used in) financing activities
    139,719       (245 )
                 
Net increase in cash and cash equivalents
   
145,829
     
11,720
 
Cash and cash equivalents at the beginning of the period
   
100,791
     
78,420
 
Impact of foreign exchange on cash and cash equivalents
   
3,034
     
(81
)
Cash and cash equivalents at the end of the period
   
249,654
     
90,059
 

 
The accompanying notes are an integral part of these unaudited condensed consolidated interim financial statements.

4
graphic
GH RESEARCH PLC
 
NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS

1.
Corporate information

GH Research PLC (the “Company”) was incorporated on March 29, 2021. The registered office of the Company is located at Joshua Dawson House, Dawson Street, Dublin 2, Ireland. The Company and its subsidiary, GH Research Ireland Limited, form the GH Research Group (the “Group” or “GH Research”).

The Company is a clinical-stage biopharmaceutical company dedicated to transforming the lives of patients by developing a practice-changing treatment in depression. Its initial focus is on developing novel and proprietary mebufotenin therapies for the treatment of patients with treatment-resistant depression, or TRD. Its portfolio currently includes GH001, a proprietary inhalable mebufotenin product candidate, and GH002, a proprietary intravenous mebufotenin product candidate.

On February 6, 2025, the Company completed a public offering on the Nasdaq Global Market (“Nasdaq”) in which it issued and sold an aggregate of 10,000,000 ordinary shares at $15.00 per share. The net proceeds of the offering were $139.8 million, after deducting underwriting discounts and directly attributable transaction costs of $10.2 million.

These unaudited condensed consolidated interim financial statements were presented to the board of directors and approved by them for issue on November 6, 2025.

2.
Basis of preparation, significant judgments, and accounting policies

Basis of preparation

Compliance with International Financial Reporting Standards
The unaudited condensed consolidated interim financial statements for the three and nine months ended September 30, 2025, have been prepared in accordance with IAS 34 “Interim Financial Reporting”. The unaudited condensed consolidated interim financial statements do not include all of the information required for full annual financial statements and should be read in conjunction with the consolidated financial statements for the year ended December 31, 2024, which were prepared in accordance with IFRS Accounting Standards as adopted by the International Accounting Standards Board (“IASB”). These unaudited condensed consolidated interim financial statements are presented in U.S. dollar (“USD” or “$”), which is the Company’s functional currency and the Group’s presentation currency.

The financial information presented in this interim report does not represent full statutory accounts as defined by the Companies Act 2014. The statutory accounts of the Company for the year ended December 31, 2024, have been filed with the Companies Registration Office.

New and amended IFRS standards
There are no new IFRS standards, amendments to standards or interpretations that are mandatory for the financial year beginning on January 1, 2025, that are relevant to the Group and that have had any material impact in the interim period. The review of the impact of new standards on the Group’s financial statements, which are not yet effective and which have not been early adopted by the Group is ongoing. This includes IFRS 18 “Presentation and Disclosure in Financial Statements”. IFRS 18 will replace IAS 1 “Presentation of financial statements”, introducing new requirements that will help to achieve comparability of the financial performance of similar entities and provide more relevant information and transparency to users. Even though IFRS 18 will not impact the recognition or measurement of items in the financial statements, its impact on presentation and disclosure is expected to be extensive. Management is currently assessing the detailed implications of applying the new standard on the Group’s financial statements.

Going concern basis
GH Research is a clinical-stage biopharmaceutical company developing innovative therapeutics. The Group is exposed to all risks inherent in establishing and developing its business, including the substantial uncertainty that current projects will succeed. Research and development expenses have been incurred from the start of the Group’s activities, generating negative cash flows from operating activities since formation.

Since its incorporation, the Group has funded its growth through capital increases. The Group has no bank loans or other debt outstanding, except lease liabilities, as of September 30, 2025. As a result, the Group is not exposed to liquidity risk through requests for early repayment of loans.

As of September 30, 2025, the Group’s cash and cash equivalents amounted to $249.7 million (December 31, 2024: $100.8 million). The Group also held marketable securities of $44.2 million and other financial assets of $nil as of September 30, 2025 (December 31, 2024: marketable securities of $62.4 million and other financial assets of $19.4 million). The marketable securities held by the Group are quoted in active markets and are an additional source of liquidity.
5
graphic
GH RESEARCH PLC
 
NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS (continued)

The board of directors believes that the Group has sufficient financial resources available to cover its planned cash outflows for at least the next twelve months from the date of issuance of these unaudited condensed consolidated interim financial statements. The Group, therefore, continues to adopt the going concern basis in preparing its unaudited condensed consolidated interim financial statements.

Use of estimates and judgments
The preparation of the unaudited condensed consolidated interim financial statements requires management to make judgments, estimates and assumptions that affect the application of accounting policies and the reported amounts of assets and liabilities, income and expense. Actual results may differ from these estimates.

In preparing these unaudited condensed consolidated interim financial statements, the significant judgments made by management in applying the Group’s accounting policies and the key sources of estimation uncertainty are as follows:

Share-based compensation expense

In preparing the share based-compensation expense in prior periods, the expected volatility assumption was based on selected volatility determined by median values observed among other comparable public companies.

In preparing the share-based compensation expense for these unaudited condensed consolidated interim financial statements, the Group has used a blended rate taking into account its own historical volatility alongside other comparable public companies. This change has been made due to the historical share price information now available for the Group. Judgment has been applied, for all periods presented, in the selection of comparable public companies and of the relevant period of observation used to determine the values.
Research and development tax credits

In the three and nine months ended September 30, 2025, an amount of $0.9 million and $2.5 million, respectively, have been recognized relating to research and development tax credits (three and nine months ended September 30, 2024, $1.2 million and $2.0 million, respectively). Included in this amount is an estimate of the claim for the year ended December 31, 2024, and for the nine months ended September 30, 2025.

A portion of the research and development tax credit claimed remains unrecognized at September 30, 2025, as management has assessed that some uncertainty remains and therefore, reasonable assurance has not been achieved. Reasonable assurance is achieved using internal experience, judgment and assistance from our professional advisors. If the portion of the research and development tax credit which remains unrecognized at September 30, 2025, increased or decreased by 5%, this would not have a material impact on the financial statements.

Aside from those highlighted above, in preparing these unaudited condensed consolidated interim financial statements, the significant judgments made by management in applying the Group’s accounting policies and the key sources of estimation uncertainty are consistent with those that applied in the preparation of the consolidated financial statements for the year ended December 31, 2024.


Accounting policies
The accounting policies, presentation and methods of computation followed in the unaudited condensed consolidated interim financial statements are consistent with those applied in the Group’s most recent annual financial statements and have been applied consistently to all periods presented in the unaudited condensed consolidated interim financial statements.

Current and deferred income tax
The interim income tax expense is calculated based on the Company’s estimate of the weighted average effective annual income tax rate expected for the full year. The current and deferred income tax charge was $nil for the three and nine months ended September 30, 2025 and 2024, which is in line with the Company’s estimate for the full year. No deferred tax assets have been recognized as there is no certainty that sufficient taxable profits will be generated within the required timeframe to be able to utilize these tax loss carry-forwards in full.

6
graphic
GH RESEARCH PLC
 
NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS (continued)
Segment reporting
Management considers the Group to have only a single segment: Research and Development (“R&D”). This is consistent with the way that information is reported internally within the Group for the purpose of allocating resources and assessing performance.

3.
Expenses by nature

The following table provides the consolidated statement of comprehensive loss classification of our expense by nature:
 
   
Three months ended
September 30,
   
Nine months ended
September 30,
 
   
2025
   
2024
    2025
    2024
 
   
$’000
   
$’000
    $’000     $’000  
External research and development expenses
   
7,027
     
6,728
      18,534       21,651  
Employee expenses1, 3
   
3,491
     
1,606
      8,733       4,964  
Depreciation
   
10
     
5
      23       16  
Other expenses
   
39
     
58
      87       179  
Total research and development expenses
   
10,567
     
8,397
      27,377       26,810  
                                 
External costs
   
3,615
     
3,016
      10,178       7,253  
Employee expenses2, 3
   
2,304
     
1,134
      6,222       3,084  
Depreciation
   
79
     
74
      224       221  
Total general and administrative expenses
   
5,998
     
4,224
      16,624       10,558  
Total operating expenses
   
16,565
     
12,621
       44,001        37,368  

1Included in employee expenses is a share-based compensation expense of $1.1 million and $2.7 million for the three and nine months ended September 30, 2025, respectively, relating to employees in the research and development department (three and nine months ended September 30, 2024, $0.1 million and $0.2 million, respectively).
 
2Included in employee expenses is share-based compensation expense of $1.2 million and $3.2 million for the three and nine months ended September 30, 2025, respectively, relating to employees in the general and administrative department (three and nine months ended September 30, 2024, $0.1 million and $0.2 million, respectively).

3Includes termination expenses incurred in the period.

Foreign exchange loss/gain


Foreign exchange loss of $0.2 million for the three months ended September 30, 2025 (foreign exchange loss of $1.8 million for the three months ended September 30, 2024), and foreign exchange gain of $1.6 million for the nine months ended September 30, 2025 (foreign exchange loss of $0.1 million for the nine months ended September 30, 2024) consists primarily of gains and losses related to the translation of the Group’s assets and liabilities from their denominated currencies into the functional currency of each entity.

7
graphic
GH RESEARCH PLC
 
NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS (continued)
4.
Finance income and expense

 
 
Three months ended
September 30,
   
Nine months ended
September 30,
 
 
 
2025
   
2024
    2025     2024  
 
 
$’000
   
$’000
    $’000
    $’000
 
Finance income
                           
Finance income on cash, cash equivalents and other financial assets
    387       567       2,275       1,647  
Gain on cash equivalents and other financial assets at fair value through profit and loss (“FVTPL”)
   
1,782
     
1,097
      4,346       3,235  
Interest income under effective interest rate method at fair value through other comprehensive income (“FVOCI”)
   
614
     
871
      1,995       2,878  
Finance income
   
2,783
     
2,535
      8,616       7,760  
 
                               
Finance expense
                               
Finance expense on investments
   
(13
)
   
(169
)
    (346 )     (500 )
Finance expense on lease liability
   
(8
)
   
(12
)
    (27 )     (38 )
Finance expense
   
(21
)
   
(181
)
    (373 )     (538 )

5.
Cash and cash equivalents

        September 30,
        December 31,
   
    2025
    2024
 
    $’000     $’000
 
Cash at bank and in hand
    32,806      
28,577
 
Cash equivalents
    216,848      
72,214
 
      249,654      
100,791
 

During the nine months ended September 30, 2025, proceeds of $19.6 million were received from the sale of other financial assets which were used to fund the operating activities of the Group, and proceeds of $19.7 million were received from the redemption of marketable securities, which includes accrued interest. On redemption of the marketable securities, the funds are invested in cash equivalents.

8
graphic
GH RESEARCH PLC
 
NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS (continued)

6.
Marketable securities


 
Marketable
securities
 
   
$’000
 
Fair value
       
At January 1, 2025
   
62,446
 
Accrued interest
   
1,995
 
Interest received
   
(509
)
Redemptions and disposals of marketable securities
    (19,670 )
Revaluation adjustment
   
(31
)
At September 30, 2025
   
44,231
 

At September 30, 2025, the Group’s marketable securities mature at varying dates within the next two years.

The movement through other comprehensive income, (“OCI”), for the three and nine months ended September 30, 2025, and September 30, 2024, is shown in the table below:
 
 
Three months ended
September 30,
   
Nine months ended
September 30,
 
    2025     2024     2025
    2024
 
   
$’000
   
$’000
   
$’000
   
$’000
 
Revaluation adjustments
    (3 )     906       (31 )     303  
Movement of expected credit losses on assets measured at FVOCI
    (30 )     2       (24 )     (45 )
Movement on marketable securities through OCI
    (33 )     908       (55 )     258  

7.
Other current assets


Other current assets primarily represent prepayments and research and development tax credit receivable.

8.
Other non-current assets


Other non-current assets represent research and development tax credit receivable.

9.
Trade payables

Trade payables primarily represents amounts incurred for the provision of manufacturing, research and consulting services and professional fees, which are outstanding at the end of the period. Trade payables are due to be settled at different times within 12 months.

10.
Other current liabilities

Other current liabilities primarily represent accruals for operating expenses and employee tax payable and are expected to be settled within one year.

9
graphic
GH RESEARCH PLC
 
NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS (continued)
11.
Share capital



On February 6, 2025, the Company completed a public offering on the Nasdaq in which it issued and sold an aggregate of 10,000,000 ordinary shares at $15.00 per share. The net proceeds of the public offering were $139.8 million, after deducting underwriting discounts and directly attributable transaction costs of $10.2 million.

   
Number of
outstanding
shares
 
At December 31, 2024
   
52,028,145
 
Share issue from public offering
   
10,000,000
 
Share option exercise
    1,250  
At September 30, 2025
   
62,029,395
 

12.
Contingencies

As of September 30, 2025, there were no material contingencies which required adjustment or disclosure in the unaudited condensed consolidated interim financial statements (2024: none).

13.
Share based compensation
 
Share Options
In June 2021, the Company adopted a share option plan referred to herein as the Share Option Plan under which grants of options are made to eligible participants. The Company initially reserved 1,202,734 ordinary shares for future issuance under the Share Option Plan, which includes ordinary shares pursuant to share-based equity awards issued to date. As of September 30, 2025, the total number of ordinary shares which may be issued under the Share Option Plan was 3,721,251, and the Company has 1,148,292 ordinary shares available for the future issuance of share-based equity awards.

Under the Share Option Plan, the options may be settled only in ordinary shares of the Company. Therefore, the grants of share options under the Share Option Plan have been accounted for as equity-settled under IFRS 2. As such, the Company records a charge for the vested portion of award grants and for partially earned but non-vested portions of award grants.
 

During the three and nine months ended September 30, 2025, the Company granted the option to purchase 97,751 and 734,751 ordinary shares, respectively, which were in line with the general terms of the Share Option Plan. Of the share options granted in the nine months ended September 30, 2025, 495,000 share options were granted which vest 25% on the first anniversary of the date of the grant, and thereafter evenly on a monthly basis over the subsequent three years. The contractual term (expiration) of these share options is seven years from the grant date with an exercise price of $0.025. Of the share options granted in the three and nine months ended September 30, 2025, the Company granted the option to purchase 14,001 ordinary shares which vested on the date of grant and are subject to a two year service condition. These share options have a contractual term (expiration) of seven years from the grant date with an exercise price of $0.025 per share. All other share options granted during the three and nine months ended September 30, 2025, 83,750 and 225,750, respectively, vest 25% on the first anniversary of the date of grant, and thereafter evenly on a monthly basis over the subsequent three years and are subject to a two-year service condition. The contractual term (expiration) of these share options is eight years from the grant date with an exercise price of the closing market price on the day prior to the grant.
 
The following table summarizes the share option awards outstanding as of September 30, 2025:
 
   
Average exercise
price per share
in
USD
   
Number of
awards
   
Weighted
average
remaining
life
in years
 
At December 31, 2024
   
3.95
     
1,869,547
     
6.56
 
Granted
   
3.65
     
734,751
     
6.94
 
Forfeited
   
11.76
     
(38,634
)
   
5.42
 
Exercised
    0.03       (1,250 )     4.83  
At September 30, 20251
   
3.75
     
2,564,414
     
6.14
 

1 364,572 of the awards outstanding as of September 30, 2025, were exercisable.
 
10
graphic
GH RESEARCH PLC
 
NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS (continued)
The weighted average grant date fair value of awards granted during the three and nine months ended September 30, 2025, was $11.09 and $10.42 per award, respectively.

The fair values of the options granted were determined on the date of the grant using the Black-Scholes option-pricing model. The fair values of the options granted during the three and nine months ended September 30, 2025, were determined on the date of the grant using the following assumptions:

   
Three months ended
  September 30, 2025
   
Nine months ended
  September 30, 2025
 
Share price, in USD
   
11.80 - 16.49
     
7.91 - 16.49
 
Strike price, in USD (weighted average)
   
11.68
     
3.65
 
Expected volatility
   
91% - 93%

   
83% - 93%

Award life (weighted average)
   
5.79
     
5.63
 
Expected dividends
   
-
     
-
 
Risk-free interest rate
   
3.66% - 4.09%

   
3.66% - 4.47%

 
As explained in note 2 “Basis of preparation, significant judgments, and accounting policies”, the expected volatility for the three and nine months ended September 30, 2025, is based on a blended rate of historical volatility observed among other comparable public companies and the Company’s own historical volatility. The expected volatility for the three and nine months ended September 30, 2025, was based on selected volatility determined by median values observed among other comparable public companies. 

The award life is based on the time interval between the date of grant and the date during the life of the share option after which, when making the grant, the Company expected on average that participants would exercise their options.


As of September 30, 2025, Other Reserves within equity includes $10.5 million (December 31, 2024: $4.9 million) relating to the Group’s Share Option Plan. Balances which relate to forfeited awards which had previously vested are transferred from Other Reserves to Accumulated Deficit. The amount of expense for all awards recognized for services received during the three months ended September 30, 2025, was $2.3 million (three months ended September 30, 2024: $0.3 million) and for the nine months ended September 30, 2025, was $5.8 million (nine months ended September 30, 2024: $0.4 million).

14.
Related party disclosures

Other than share options granted to key management of 494,001 in the period ended September 30, 2025, there have been no transactions (2024: none) with related parties that had a material effect on the financial position or performance of the Group.

15.
Loss per share


 
Three months ended
September 30,
   
Nine months ended
September 30,
 
   
2025
    2024     2025
    2024
 
Loss attributable to shareholders (in $’000)
   
(14,020
)
   
(12,114
)
    (34,121 )     (30,159 )
Weighted average number of shares in issue
    62,029,395      
52,028,145
      60,710,082       52,028,145  
Basic and diluted loss per share (in USD)
   
(0.23
)
   
(0.23
)
    (0.56 )     (0.58 )

For the three and nine months ended September 30, 2025, and 2024, basic and diluted loss per share are calculated on the weighted average number of shares issued and outstanding and exclude shares to be issued under the Share Option Plan, as the effect of including those shares would be anti-dilutive.

11
graphic
GH RESEARCH PLC
 
NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS (continued)
16.
Events after the reporting date

There were no events after the reporting date requiring disclosure in the Group’s consolidated financial statements.


12

EX-99.2 3 ef20057691_ex99-2.htm EXHIBIT 99.2

Exhibit 99.2

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
This management’s discussion and analysis is designed to provide you with a narrative explanation of our financial condition and results of operations. You should read this discussion and analysis in conjunction with our unaudited condensed consolidated interim financial statements, including the notes thereto, as of and for the three and nine months ended September 30, 2025. You should also read this discussion and analysis in conjunction with our audited consolidated financial statements, including the notes thereto, and the section in our annual report on Form 20-F/A for the year ended December 31, 2024, titled “Item 3. Key Information—D. Risk Factors.”
 
Our unaudited condensed consolidated interim financial statements for the three and nine months ended September 30, 2025, were prepared in accordance with International Accounting Standard 34, Interim Financial Reporting. The terms “dollar,” “USD” or “$” refer to U.S. dollars. We have made rounding adjustments to some of the figures included in this discussion. Accordingly, any numerical discrepancies in any table between totals and sums of the amounts listed are due to rounding.
 
Unless otherwise indicated or the context otherwise requires, all references in this discussion and analysis to “GH Research” or “GH,” the “Company,” “we,” “our,” “ours,” “us” or similar terms refer to GH Research PLC and its consolidated subsidiary.
 
Overview
 
We are a clinical-stage biopharmaceutical company dedicated to transforming the lives of patients by developing a practice-changing treatment in depression. Our initial focus is on developing our novel and proprietary mebufotenin therapies for the treatment of patients with treatment-resistant depression, or TRD.
 
Our portfolio currently includes GH001, our proprietary inhalable mebufotenin product candidate, and GH002, our proprietary intravenous mebufotenin product candidate. While GH001 is currently delivered via a vaporization device produced by a third party, we are developing a proprietary aerosol delivery device, which is currently in clinical investigation in Europe. We have completed two Phase 1 healthy volunteer clinical trials for GH001 (GH001-HV-101 and GH001-HV-103), in which administration of GH001 via inhalation was observed to be well tolerated at the investigated single dose levels and in an individualized dosing regimen, or IDR, with intra-subject dose escalation within a single day. We have also completed a Phase 1/2 clinical trial in patients with TRD (GH001-TRD-102) and have recently completed a randomized, double-blind, placebo-controlled Phase 2b trial in patients with TRD (GH001-TRD-201). Based on observed clinical activity in these clinical trials, we believe that administration of GH001 has the potential to induce ultra-rapid remissions as measured by the Montgomery–Åsberg Depression Rating Scale, or MADRS, in TRD patients.
 
We have incurred losses since inception, including losses of $34.1 million for the nine months ended September 30, 2025, and losses of $39.0 million and $35.6 million for the years ended December 31, 2024 and 2023, respectively. As of September 30, 2025, we had an accumulated deficit of $140.3 million. We expect to incur significant expenses and operating losses for the foreseeable future as we expand our research and development activities. In addition, our losses from operations may fluctuate significantly from quarter-to-quarter and year-to-year, depending on the timing of our clinical trials, our expenditures on other research and development activities, and based on foreign currency translation differences. We anticipate that our expenses will increase significantly in connection with our ongoing activities, if and as we:
 

continue to develop and conduct clinical trials, including in expanded geographies such as the United States, for our GH001 and GH002 product candidates for our initial indications and any additional indications;

continue both the technical development and expansion of our external manufacturing capabilities for our current product candidates GH001 and GH002, and of the medical devices required to deliver these product candidates, such as our proprietary aerosol delivery device for GH001;

initiate and continue research and development, including technical, nonclinical, clinical, and discovery efforts for any future product candidates;

seek to identify additional product candidates;
 


seek regulatory approvals for our product candidates GH001 and GH002 including the medical devices required to deliver these product candidates, such as our proprietary aerosol delivery device for GH001, or any other product candidates that successfully complete clinical development;

progress any nonclinical programs and any other work that may be required to lift the clinical hold on the study we proposed in our IND for GH001;

add operational, financial and management information systems and personnel, including personnel to support our product candidate and device development and help us comply with our obligations as a public company;

hire and retain additional personnel, such as clinical, quality control, scientific, commercial, sales, marketing and administrative personnel;

continue to prepare, file, prosecute, maintain, protect and enforce our intellectual property rights and claims;

establish sales, marketing, distribution, manufacturing, supply chain and other commercial infrastructure in the future to commercialize various products for which we may obtain regulatory approval;

comply with ongoing regulatory requirements for products approved for commercial sale, if ever;

acquire or in-license other product candidates, medical devices to deliver our product candidates, and other technologies; and

incur increased costs as a result of operating as a public company.
 
In addition, as we progress toward marketing approval for any of our product candidates, we also expect to incur significant commercialization expenses related to product manufacturing, marketing, sales, and distribution. As a result, we will need substantial additional funding to support our continuing operations and pursue our growth strategy. Until such time as we can generate significant revenue from product sales, if ever, we expect to finance our operations through the sale of equity, debt financings or other capital sources, including potential collaborations with other companies or other strategic transactions. We cannot be certain that additional funding will be available on acceptable terms, or at all. If we fail to raise capital or enter into such agreements as and when needed, we may have to significantly delay, scale back, or discontinue the development and commercialization of one or more of our product candidates or other research and development initiatives, which could have a material adverse effect on our business, results of operations, and financial condition. We will need to generate significant revenue to achieve profitability, and we may never do so.
 
We are subject to a number of risks comparable to those of other similar companies, including dependence on key individuals; the need to develop product candidates with the required safety and efficacy profile and which support regulatory approval and are commercially viable; competition from other companies, many of which are larger and better capitalized; and the need to obtain adequate additional financing to fund the development of our product candidates.
 
Business Updates
 
GH001 Update
 
In July 2025, we announced that we received a communication from the U.S. Food and Drug Administration (FDA) relating to our complete response to the clinical hold of our Investigational New Drug Application (IND) for GH001, with only one hold topic remaining.
 
We are actively working with experts to address the remaining topic and engagement with the FDA on our IND complete response is ongoing.
 
Final Data from Fully Completed Phase 2b TRD
 
In July 2025, we reported on the full dataset from the Phase 2b clinical trial of GH001 in treatment-resistant depression (TRD) (GH001-TRD-201).
 
The primary endpoint was met with a highly significant placebo adjusted reduction from baseline of -15.5 points in Montgomery-Åsberg Depression Rating Scale (MADRS) total score on Day 8 (p<0.0001).
 
The full analysis of the open-label extension (OLE) confirms a 73% remission rate at 6 months with infrequent treatment visits and no mandated psychotherapeutic intervention.
 
There were no treatment-related serious adverse events during the full 6-month duration of the trial. No treatment-emergent events of suicidal intent or suicidal behavior occurred during the 6-month duration of the trial.
 
In October 2025, we attended the 38th Annual European College of Neuropsychopharmacology Congress (ECNP) in Amsterdam, the Netherlands. At the conference, the long-term safety and efficacy data from the OLE of our randomized, double-blind, placebo-controlled Phase 2b clinical trial with GH001 in patients with TRD (GH001-TRD-201) were presented at the Novel Therapies Symposium by Professor Wiesław J. Cubała, MD, PhD, Department of Psychiatry, Faculty of Medicine, Medical University of Gdańsk. In addition, at the same conference, two posters were exhibited on the OLE safety and tolerability data as well as data on the psychoactive effects of GH001 in patients with TRD from GH001-TRD-201.

We continue to expect to initiate our global pivotal program in 2026.


Comparison of the Three months ended September 30, 2025 and 2024
 
The following table summarizes our results of operations for the three months ended September 30, 2025 and 2024:
 
 
Three months ended
September 30,
 
 
2025
   
2024
   
Change
 
   
(in USD thousands)
 
Operating Expenses:
                 
Research and development
   
(10,567
)
   
(8,397
)
   
(2,170
)
General and administrative
   
(5,998
)
   
(4,224
)
   
(1,774
)
Loss from operations
   
(16,565
)
   
(12,621
)
   
(3,944
)
Net finance income1
   
2,792
     
2,352
     
440
 
Foreign exchange loss
   
(247
)
   
(1,845
)
   
1,598
 
Loss for the period
   
(14,020
)
   
(12,114
)
   
(1,906
)
1Net finance income for the three months ended September 30, 2025 and 2024, comprises finance income, finance expense and expected credit losses.
 

Research and Development Expenses
 
The following table summarizes our research and development expenses for the three months ended September 30, 2025 and 2024:
 
   
Three months ended
September 30,
 
   
2025
   
2024
   
Change
 
   
(in USD thousands)
 
External research and development expenses
   
(7,027
)
   
(6,728
)
   
(299
)
Employee expenses1
   
(3,491
)
   
(1,606
)
   
(1,885
)
Depreciation
   
(10
)
   
(5
)
   
(5
)
Other expenses
   
(39
)
   
(58
)
   
19
 
Research and development
   
(10,567
)
   
(8,397
)
   
(2,170
)
1 Includes a share-based compensation expense of $1.1 million and $0.1 million for the three months ended September 30, 2025 and 2024, respectively. 
 
The following table summarizes our research and development expenses for our product candidates for the three months ended September 30, 2025 and 2024:
 
 
Three months ended
September 30,
 
 
2025
   
2024
   
Change
 
   
(in USD thousands)
 
GH001
   
(7,412
)
   
(6,551
)
   
(861
)
GH002
   
(255
)
   
(316
)
   
61
 
Related to multiple product candidates and exploratory work for potential future product candidates
   
(2,900
)
   
(1,530
)
   
(1,370
)
Research and development
   
(10,567
)
   
(8,397
)
   
(2,170
)


Research and development expenses increased by $2.2 million to $10.6 million for the three months ended September 30, 2025, from $8.4 million for the three months ended September 30, 2024. The increase is primarily due to increased expenses relating to our technical development activities and employee expenses. These increases have been partly offset by a decrease in clinical development expenses including clinical trial expenses.
 
Research and development expenses for our product candidates will fluctuate from period to period primarily due to the nature and timing associated with the various lifecycle stages of each candidate.
 
Research and development expenses relating to GH001 increased by $0.9 million in the three months ended September 30, 2025. The increase is primarily due to increased expenses relating to our technical development activities, partly offset by a decrease in clinical development expenses including clinical trial expenses.
 
Research and development expenses relating to multiple product candidates increased by $1.4 million in the three months ended September 30, 2025, primarily due to an increase in employee expenses.
 
General and Administrative Expenses
 
The following table summarizes our general and administrative expenses for the three months ended September 30, 2025 and 2024:
 
   
Three months ended
September 30,
 
   
2025
   
2024
   
Change
 
   
(in USD thousands)
 
External costs
   
(3,615
)
   
(3,016
)
   
(599
)
Employee expenses1
   
(2,304
)
   
(1,134
)
   
(1,170
)
Depreciation
   
(79
)
   
(74
)
   
(5
)
General and administrative
   
(5,998
)
   
(4,224
)
   
(1,774
)
1 Includes a share-based compensation expense of $1.2 million and $0.1 million for the three months ended September 30, 2025 and 2024, respectively. 
 
General and administrative expenses increased by $1.8 million to $6.0 million for the three months ended September 30, 2025, from $4.2 million for the three months ended September 30, 2024. The increase is primarily due to an increase in professional fees and employee expenses in our general and administrative functions to support our growth initiatives.
 
Net Finance Income
 
Net finance income increased by $0.4 million to $2.8 million for the three months ended September 30, 2025, from $2.4 million for the three months ended September 30, 2024. The increase is primarily due to an increase in finance income relating to return on investments.
 
Foreign Exchange Loss
 
Foreign exchange loss is $0.2 million for the three months ended September 30, 2025, a movement of $1.6 million from a loss of $1.8 million for the three months ended September 30, 2024. This movement is primarily as a result of the translation of our assets and liabilities from their denominated currencies into the functional currency of each entity.
 

Comparison of the Nine months ended September 30, 2025 and 2024
 
The following table summarizes our results of operations for the nine months ended September 30, 2025 and 2024:
 
   
Nine months ended
September 30,
 
   
2025
   
2024
   
Change
 
   
(in USD thousands)
 
Operating Expenses:
                 
Research and development
   
(27,377
)
   
(26,810
)
   
(567
)
General and administrative
   
(16,624
)
   
(10,558
)
   
(6,066
)
Loss from operations
   
(44,001
)
   
(37,368
)
   
(6,633
)
Net finance income1
   
8,267
     
7,267
     
1,000
 
Foreign exchange gain/(loss)
   
1,613
     
(58
)
   
1,671
 
Loss for the period
   
(34,121
)
   
(30,159
)
   
(3,962
)
1Net finance income for the nine months ended September 30, 2025 and 2024, comprises finance income, finance expense and expected credit losses.
 

Research and Development Expenses
 
The following table summarizes our research and development expenses for the nine months ended September 30, 2025 and 2024:
 
   
Nine months ended
September 30,
 
   
2025
   
2024
   
Change
 
   
(in USD thousands)
 
External research and development expenses
   
(18,534
)
   
(21,651
)
   
3,117
 
Employee expenses1
   
(8,733
)
   
(4,964
)
   
(3,769
)
Depreciation
   
(23
)
   
(16
)
   
(7
)
Other expenses
   
(87
)
   
(179
)
   
92
 
Research and development
   
(27,377
)
   
(26,810
)
   
(567
)
1 Includes share-based compensation expense of $2.7 million and $0.2 million for the nine months ended September 30, 2025 and 2024, respectively. 
 
 The following table summarizes our research and development expenses for our product candidates for the nine months ended September 30, 2025 and 2024:
 
   
Nine months ended
September 30,
 
   
2025
   
2024
   
Change
 
 
 
(in USD thousands)
 
GH001
   
(18,249
)
   
(18,867
)
   
618
 
GH002
   
(1,760
)
   
(1,472
)
   
(288
)
GH003
   
-
     
(18
)
   
18
 
Related to multiple product candidates and exploratory work for potential future product candidates
   
(7,368
)
   
(6,453
)
   
(915
)
Research and development
   
(27,377
)
   
(26,810
)
   
(567
)


Research and development expenses increased by $0.6 million to $27.4 million for the nine months ended September 30, 2025, from $26.8 million for the nine months ended September 30, 2024. The increase is primarily due to an increase in expenses relating to nonclinical activities, technical development activities, as well as employee expenses. These increases have been partly offset by a decrease in clinical development expenses including clinical trial expenses and an increase in the benefit of a research and development tax credit.
 
Research and development expenses for our product candidates will fluctuate from period to period primarily due to the nature and timing associated with the various lifecycle stages of each candidate.
 
Research and development expenses relating to GH001 decreased by $0.6 million in the nine months ended September 30, 2025, primarily due to a decrease in clinical development expenses including clinical trial expenses, partly offset by an increase in technical development and nonclinical activities.
 
Research and development expenses relating to GH002 increased by $0.3 million in the nine months ended September 30, 2025, primarily due to an increase in nonclinical activities, partly offset by a decrease in technical development expenses and clinical development expenses including clinical trial expenses.
 
Research and development expenses which relate to multiple product candidates increased by $0.9 million in the nine months ended September 30, 2025, primarily due to an increase in employee expenses, partly offset by a decrease in technical development expenses, clinical development expenses and an increase in the benefit of a research and development tax credit.
 
General and Administrative Expenses
 
The following table summarizes our general and administrative expenses for the nine months ended September 30, 2025, and 2024:
 
   
Nine months ended
September 30,
 
   
2025
   
2024
   
Change
 
   
(in USD thousands)
 
External costs
   
(10,178
)
   
(7,253
)
   
(2,925
)
Employee expenses1
   
(6,222
)
   
(3,084
)
   
(3,138
)
Depreciation
   
(224
)
   
(221
)
   
(3
)
General and administrative
   
(16,624
)
   
(10,558
)
   
(6,066
)
1  Includes share-based compensation expense of $3.2 million and $0.2 million for the nine months ended September 30, 2025 and 2024, respectively.
 
General and administrative expenses increased by $6.1 million to $16.6 million for the nine months ended September 30, 2025, from $10.6 million for the nine months ended September 30, 2024. The increase is primarily due to an increase in professional fees and employee expenses in our general and administrative functions to support our growth initiatives.
 
Net Finance Income
 
Net finance income increased by $1.0 million to $8.3 million for the nine months ended September 30, 2025, from $7.3 million for the nine months ended September 30, 2024. The increase is primarily due to an increase in finance income relating to return on investments.
 

Foreign Exchange Gain
 
Foreign exchange gain is $1.6 million for the nine months ended September 30, 2025, a movement of $1.7 million from a loss of $0.1 million for the nine months ended September 30, 2024. This movement is primarily as a result of the translation of our assets and liabilities from their denominated currencies into the functional currency of each entity.
 
Liquidity and Capital Resources
 
Sources of Liquidity
 
We have incurred operating losses since inception, and we have not generated any revenue from any product sales or any other sources. We have not yet commercialized any of our product candidates, which are in various phases of technical and clinical development, and we do not expect to generate revenue from sales of any products for several years, if at all. Until such time as we can generate significant revenue from product sales, if ever, we expect to finance our operations through the sale of equity, debt financings or other capital sources, including potential collaborations with other companies or other strategic transactions. We have funded our operations to date primarily through equity financings, including our initial public offering. In February 2025, we completed a public offering in which we issued and sold 10,000,000 ordinary shares at $15.00 per share. The net proceeds of the offering are $139.8 million, after deducting underwriting discounts and directly attributable transaction costs of $10.2 million.
 
As of September 30, 2025, we had cash, cash equivalents and marketable securities of $293.9 million, compared to cash, cash equivalents, other financial assets and marketable securities of $182.6 million as of December 31, 2024.
 
We plan to continue to fund our operating and capital funding needs through sales of additional equity or other forms of financing. We may also consider pursuing strategic partnerships for clinical development and commercialization of our product candidates. The sale of additional equity would result in dilution to our shareholders.
 
Cash Flows
 
The following table provides information regarding our cash flows for the nine months ended September 30, 2025 and 2024:
 
   
Nine months ended
September 30,
 
   
2025
   
2024
   
Change
 
   
(in USD thousands)
 
Net cash flows used in operating activities
   
(31,222
)
   
(31,839
)
   
617
 
Net cash flows from investing activities
   
37,332
     
43,804
     
(6,472
)
Net cash flows from/(used in) financing activities
   
139,719
     
(245
)
   
139,964
 
Net increase in cash and cash equivalents
   
145,829
     
11,720
     
134,109
 


Net Cash Flows Used in Operating Activities
 
Net cash flows used in operating activities decreased by $0.6 million to $31.2 million for the nine months ended September 30, 2025, from $31.8 million for the nine months ended September 30, 2024, due to an increase in loss from operations for the period and movement in working capital.
 
Net Cash Flows From Investing Activities
 
Net cash flows from investing activities decreased by $6.5 million to $37.3 million for the nine months ended September 30, 2025, from $43.8 million for the nine months ended September 30, 2024, due to a decrease in the proceeds from the redemption of marketable securities and a decrease in the proceeds from the sale of other financial assets.
 
Net Cash Flows From/(Used in) Financing Activities
 
Net cash flows from financing activities increased to $139.7 million in the nine months ended September 30, 2025, from net cash flows used in financing activities of $0.2 million in the nine months ended September 30, 2024. The increase is due to the receipt of proceeds from the public offering which took place during the nine months ended September 30, 2025.
 
Funding Requirements
 
We expect our expenses to continue to increase substantially in connection with our ongoing research and development activities, particularly as we advance the technical development work, nonclinical studies and clinical trials of our product candidates and the medical devices required to deliver such product candidates. In addition, if we obtain regulatory approval for any of our product candidates, we expect to incur significant commercialization expenses related to sales, marketing, manufacturing and distribution. Furthermore, we have incurred and expect to continue to incur additional costs associated with operating as a public company. Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of public or private equity offerings, debt financings, convertible debt financings, strategic collaborations and licensing arrangements. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves. Our future capital requirements will depend on many factors, which are outlined in our annual report on Form 20-F/A for the year ended December 31, 2024, and this discussion and analysis. We believe that we have sufficient financial resources available to cover our planned cash outflows for at least the next twelve months.
 
Critical Accounting Estimates
 
There have been no material changes to the significant accounting policies and significant judgments and estimates from those referred to in the section in our annual report on Form 20-F/A for the year ended December 31, 2024, titled “Item 5. Operating and Financial Review and Prospects—E. Critical Accounting Estimates.”
 
Emerging Growth Company Status
 
On April 5, 2012, the Jumpstart Our Business Startups Act of 2012 (“JOBS Act”) was enacted. As an emerging growth company, or EGC, we rely on exemptions and reduced reporting requirements under the JOBS Act including exemptions from (i) providing an auditor’s attestation report on our system of internal controls over financial reporting pursuant to Section 404(b) of the Sarbanes-Oxley Act and (ii) complying with any requirement that may be adopted by the Public Company Accounting Oversight Board, regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements, known as the auditor discussion and analysis.
 
We will remain classified as an EGC until the earlier of (1) the last day of the fiscal year (i) in which we have total annual gross revenue of $1.235 billion; (ii) following the fifth anniversary of the completion of our initial public offering; or (iii) in which we are deemed to be a “large accelerated filer,” which requires the market value of our ordinary shares that is held by non-affiliates to exceed $700 million as of the prior June 30th, and (2) the date on which we have issued more than $1 billion in nonconvertible debt during the previous three-year period.
 

Recently Issued Accounting Pronouncements
 
As disclosed in note 2 to our unaudited condensed consolidated interim financial statements, there are no standards that are mandatory for the financial year beginning on January 1, 2025, that are relevant to, and have had any material impact on, our unaudited condensed consolidated interim financial statements. The review of the impact of new standards on our unaudited condensed consolidated interim financial statements, including IFRS 18 “Presentation and Disclosure in Financial Statements”, which is not yet effective, and which has not been early adopted by us, is ongoing.
 
Risk Factors
 
The information presented below updates, and should be read in conjunction with, the risk factors and information disclosed in our Annual Report on Form 20-F/A for the year ended December 31, 2024. Except as presented below, there have been no material changes in our risk factors since those reported in our Annual Report for the year ended December 31, 2024.
 
It may take considerable time and expense to resolve the clinical hold that has been placed by the FDA on the study we proposed in our IND for GH001, and no assurance can be given that the FDA will remove the clinical hold, which could have a material adverse effect on our clinical development efforts or could otherwise harm our business, financial condition, results of operation and prospects.
 
On September 29, 2023, we announced that we were notified by the FDA that the study we proposed in our IND for GH001 has been placed on clinical hold. In October 2023, we received the formal clinical hold letter from the FDA, requesting that we provide (i) an inhalation toxicology study in a non-rodent species, and an additional inhalation toxicology study in rats, related to respiratory tract histology findings from a previously completed inhalation toxicology study in rats, (ii) additional device design verification information, and (iii) updates to our investigator brochure. On January 10, 2025, we announced the completion of the requested inhalation toxicology studies. On June 20, 2025, we announced that we submitted our complete response to the previously announced clinical hold. In July 2025, we received a response from the FDA following our submission stating that it was maintaining its clinical hold at this time and requesting additional information. We are working to respond to the FDA’s requests, but there are no assurances that the FDA will accept the results of nonclinical studies or other responses (including device design verification information) we may provide, and the FDA may require us to conduct additional nonclinical studies or other work, or have additional questions. While we do not believe the respiratory tract histology findings from our completed inhalation toxicology studies in rats to be necessarily predictive of respiratory tract toxicology in other species or humans, we may see similar findings in nonclinical studies completed in other species, if conducted, or even in humans. If the FDA does not accept the results of our nonclinical studies or our conclusions from those studies, disagrees with other responses we may provide, requires us to conduct additional trials or studies and/or finds the device design verification information we provide to be unsatisfactory, it may take a further considerable period of time, the length of which is not certain at this time, and expense for us to fully address the FDA’s concerns. Any such delays and/or increases in expense caused by the additional nonclinical studies or device design verification information we intend to submit could be exacerbated by a need to find, or develop, an alternative device to deliver GH001. Further, comparable foreign regulatory authorities may also have questions or requests or may initiate the equivalent of a clinical hold, in each case prompted by the clinical hold by the FDA or by the nonclinical studies or any other work we may initiate, which may similarly take considerable time and expense for us to address. Even if we are able to fully respond to the FDA’s current concerns, the FDA may subsequently make additional requests that we would need to fulfill prior to the lifting of the clinical hold. It is possible that we will be unable to fully address the FDA’s concerns and, as a result, the clinical hold may never be lifted, and we may never be able to initiate clinical trials for GH001 in the United States. It is also possible that the clinical hold may be lifted as to the clinical trial of GH001 we proposed in our IND, but that future clinical trials of GH001 or clinical trials of GH002 or other product candidates we propose in future INDs are placed on clinical hold by the FDA. These matters could have a material adverse effect on our clinical development efforts or could otherwise harm our business, financial condition, results of operation and prospects.
 

We may not be able to submit INDs or IND amendments, or comparable foreign applications, to commence additional clinical trials on the timelines we expect, and even if we are able to do so, the FDA, EMA or comparable foreign regulatory authorities may not permit us to proceed.
 
In November 2022, we announced that we submitted clinical trial applications in several European countries for a multi-center, randomized, double-blind, placebo-controlled Phase 2b trial of GH001 in TRD (GH001-TRD-201), and in August 2023, we submitted an IND for GH001 with the FDA, with the purpose to initiate a Phase 1 healthy volunteer clinical pharmacology trial, where GH001 is administered using our proprietary aerosol delivery device (GH001-HV-106). We also expect to submit an IND for GH002 with the FDA. However, we may not be able to submit INDs or comparable foreign applications for GH001, GH002, or for our other product candidates, on the timelines we expect. For example, we may experience delays with IND-enabling studies. Moreover, we cannot be sure that submission of an IND or a comparable foreign application will result in the FDA, the European Medicines Agency, or the EMA, or a comparable foreign regulatory authority allowing clinical trials to begin, or that, once begun, issues will not arise that suspend or terminate clinical trials. For example, we announced in September 2023 that the FDA placed our IND for GH001 on clinical hold and in July 2025 we received a response from the FDA stating that it was maintaining its clinical hold at this time and requesting additional information. See “—It may take considerable time and expense to resolve the clinical hold that has been placed by the FDA on the study we proposed in our IND for GH001, and no assurance can be given that the FDA will remove the clinical hold, which could have a material adverse effect on our clinical development efforts or could otherwise harm our business, financial condition, results of operation and prospects” above for further information on certain of the risks associated with this clinical hold. Additionally, even if such regulatory authorities ultimately agree with the design and implementation of the clinical trials set forth in an IND or in a comparable foreign application, we cannot guarantee that such regulatory authorities will not change their requirements in the future. These considerations also apply to new clinical trials we may submit as amendments to existing INDs or to a new IND, or to comparable existing or new foreign applications. Any failure to submit INDs or comparable foreign applications on the timelines we expect, or to obtain permission for our trials to proceed, may prevent us from completing our clinical trials or commercializing our products on a timely basis, if at all.
 
Cautionary Statement Regarding Forward-Looking Statements
 
This discussion contains statements that are, or may be deemed to be, forward-looking. All statements other than statements of historical fact included in this discussion, including statements regarding the clinical hold on GH001, including plans and expectations for progressing any nonclinical programs and any other work needed to lift the continuing clinical hold and the timing required for the FDA to lift such clinical hold; our plans and expectations with respect to progressing development of GH002 and the likelihood of IND submission; our targets regarding the initiation of our first global pivotal program; our business strategy, product candidates, medical devices required to deliver these product candidates, ongoing and currently planned nonclinical studies and clinical trials, regulatory submissions and approvals and their effects on our business strategy; our expectations related to commencing trials in the United States, research and development costs, cash runway, as well as plans and objectives of management for future operations, are forward-looking statements. Many of the forward-looking statements contained in this discussion can be identified by the use of forward-looking words such as “may,” “anticipate,” “believe,” “could,” “expect,” “should,” “plan,” “intend,” “estimate,” “will,” “potential” and “ongoing,” among others.
 
Forward-looking statements appear in a number of places in this discussion and include, but are not limited to, statements regarding our intent, belief or current expectations. Forward-looking statements are based on our management’s beliefs and assumptions and on information currently available to our management. Such statements are subject to risks and uncertainties, and actual results may differ materially from those expressed or implied in the forward-looking statements due to various factors, including, but not limited to, those identified under the section titled “—Risk Factors” herein and the section in our annual report on Form 20-F/A for the year ended December 31, 2024, titled “Item 3. Key Information—D. Risk Factors.” These risks and uncertainties include, among others, factors relating to:
 

the commencement, timing, progress and results of our research and development programs, nonclinical studies and clinical trials;
 


the timing, progress and results of developing and conducting clinical trials for our GH001 and GH002 product candidates and the medical devices required to deliver these product candidates, such as our proprietary aerosol delivery device for GH001, for our initial and any additional indications;

our efforts to expand into other jurisdictions such as the United States and in Europe;

our expectations related to the technical development and expansion of our external manufacturing capabilities for our GH001 and GH002 product candidates as well as the medical devices required to deliver these product candidates, such as our proprietary aerosol delivery device for GH001;

our reliance on the success of our GH001 and GH002 product candidates;

the timing, scope or likelihood of regulatory filings and approvals by the FDA, the EMA, or other comparable foreign regulatory authorities, for our GH001 and GH002 product candidates and our initial and any additional indications;

our expectations related to the clinical hold imposed by the FDA on the study we proposed in our IND for GH001, including our plans and expectations for progressing any nonclinical programs and any other work to lift the clinical hold, the timing required to lift such clinical hold and for discussions with the FDA and the outcomes and resolution of such discussions;

our expectations regarding the size of the eligible patient populations for our GH001 and GH002 product candidates, if approved for commercial use;

our ability to identify third-party clinical trial sites to conduct trials and our ability to identify and train appropriately qualified therapists to administer our investigational therapy;

the effect of pandemics, such as the COVID-19 pandemic, epidemics, outbreaks of an infectious disease or similar events on aspects of our business or operations, including delays in the regulatory approval process, contracting with clinical trial sites and engaging in clinical trials;

our ability to implement our business model and our strategic plans for our business and GH001 and GH002 product candidates;

our ability to identify, develop or acquire and obtain approval by the FDA, EMA or other comparable foreign regulatory authorities of medical devices required to deliver our GH001 and GH002 product candidates, such as our proprietary aerosol delivery device for GH001;

our commercialization and marketing capabilities and strategy;

the effects of undesirable clinical trial outcomes and potential adverse public perception regarding the use of mebufotenin and psychedelics generally on the regulatory approval process and future development of our product;

the pricing, coverage and reimbursement of our GH001 and GH002 product candidates, if approved;

the scalability and commercial viability of our manufacturing methods and processes;

the rate and degree of market acceptance and clinical utility of our GH001 and GH002 product candidates;

our reliance on third-party suppliers for our nonclinical study and clinical trial drug substance and product candidate supplies, as well as key raw materials used in our manufacturing processes;

our ability to establish or maintain collaborations or strategic relationships or obtain additional funding;

our expectations regarding potential benefits of our GH001 and GH002 product candidates and our approach generally;

our expectations around regulatory development paths and with respect to Controlled Substances Act, or CSA, classification;

the scope of protection we and any current or future licensors or collaboration partners are able to establish and maintain for intellectual property rights covering our GH001 and GH002 product candidates;

our ability to operate our business without infringing, misappropriating, or otherwise violating the intellectual property rights and proprietary technology of third parties;

our ability to protect our intellectual property rights, including enforcing and defending intellectual property-related claims;

regulatory developments in the United States, under the laws and regulations of the European Union and other jurisdictions;



continuing inflation, imposition of tariffs, interest rates and foreign currency exchange rates, disruptions in global supply chains and labor markets, and geopolitical risks and global hostilities, including any direct or indirect economic impacts resulting from Russia’s invasion of Ukraine, the ongoing military conflict between Israel and Hamas and any resulting conflicts in the region, tariff and trade wars, or increased tensions between China and Taiwan;

developments and projections relating to our competitors and our industry;

our ability to maintain an effective system of internal control over financial reporting;

the amount of time that our existing cash, cash equivalents, other financial assets and marketable securities will be sufficient to fund our operations and capital expenditures;

our estimates regarding expenses, capital requirements and needs for additional financing;

our ability to effectively manage our anticipated growth;

our ability to attract and retain qualified employees and key personnel;

whether we are classified as a passive foreign investment company for current and future periods;

our expectations regarding the time during which we will be an EGC under the JOBS Act or the time during which we will be a foreign private issuer;

the future trading price of the ordinary shares and impact of securities analysts’ reports on this price; and

other risks and uncertainties, including those listed under “—Risk Factors” herein and “Item 3. Key Information—D. Risk Factors” in our annual report on Form 20-F/A for the year ended December 31, 2024.
 
These forward-looking statements speak only as of the date of this discussion and are subject to a number of risks, uncertainties and assumptions described under the section titled “—Risk Factors” herein and the sections in our annual report on Form 20-F/A for the year ended December 31, 2024, titled “Item 3. Key Information—D. Risk Factors” and “Item 5. Operating and Financial Review and Prospects” and elsewhere in our annual report and this discussion. Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified and some of which are beyond our control, you should not rely on these forward-looking statements as predictions of future events. The events and circumstances reflected in our forward-looking statements may not be achieved or occur and actual results could differ materially from those projected in the forward-looking statements. Moreover, we operate in an evolving environment. New risk factors and uncertainties may emerge from time to time, and it is not possible for management to predict all risk factors and uncertainties. Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise.
 
In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this discussion, and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements.
 
 
EX-99.3 4 ef20057691_ex99-3.htm EXHIBIT 99.3

Exhibit 99.3

 
GH Research Reports Third Quarter 2025 Financial Results and Provides Business Updates
 
November 6, 2025

 
Engagement with FDA on GH001 IND complete response ongoing

 
Full dataset from the Phase 2b clinical trial of GH001 in TRD reported in July 2025

 
Long-term clinical data on safety and efficacy from Open-Label Extension presented at ECNP in October 2025

 
Cash, cash equivalents and marketable securities of $293.9 million as of September 30, 2025
 
DUBLIN, November 6, 2025 (GLOBE NEWSWIRE) -- GH Research PLC (Nasdaq: GHRS), a clinical-stage biopharmaceutical company dedicated to transforming the lives of patients by developing a practice-changing treatment in depression, today reported financial results for the quarter ended September 30, 2025, and provided updates on its business.

Business Updates
 
GH001 Update
 
In July 2025, we announced that we received a communication from the U.S. Food and Drug Administration (FDA) relating to our complete response to the clinical hold of our Investigational New Drug Application (IND) for GH001, with only one hold topic remaining.
 
We are actively working with experts to address the remaining topic and engagement with the FDA on our IND complete response is ongoing.
 
Final Data from Fully Completed Phase 2b TRD
 
In July 2025, we reported on the full dataset from the Phase 2b clinical trial of GH001 in treatment-resistant depression (TRD) (GH001-TRD-201).
 
The primary endpoint was met with a highly significant placebo adjusted reduction from baseline of -15.5 points in Montgomery-Åsberg Depression Rating Scale (MADRS) total score on Day 8 (p<0.0001).
 
The full analysis of the open-label extension (OLE) confirms a 73% remission rate at 6 months with infrequent treatment visits and no mandated psychotherapeutic intervention.
 


There were no treatment-related serious adverse events during the full 6-month duration of the trial. No treatment-emergent events of suicidal intent or suicidal behavior occurred during the 6-month duration of the trial.

In October 2025, we attended the 38th Annual European College of Neuropsychopharmacology Congress (ECNP) in Amsterdam, the Netherlands. At the conference, the long-term safety and efficacy data from the OLE of our randomized, double-blind, placebo-controlled Phase 2b clinical trial with GH001 in patients with TRD (GH001-TRD-201) were presented at the Novel Therapies Symposium by Professor Wiesław J. Cubała, MD, PhD, Department of Psychiatry, Faculty of Medicine, Medical University of Gdańsk. In addition, at the same conference, two posters were exhibited on the OLE safety and tolerability data as well as data on the psychoactive effects of GH001 in patients with TRD from GH001-TRD-201.
 
We continue to expect to initiate our global pivotal program in 2026.
 
Third Quarter 2025 Financial Highlights
 
Cash position
 
Cash, cash equivalents and marketable securities were $293.9 million as of September 30, 2025, compared to cash, cash equivalents, other financial assets and marketable securities of $182.6 million as of December 31, 2024. Other financial assets are comprised of money market funds, and marketable securities are comprised of investment grade bonds.
 
Research and development expenses
 
R&D expenses were $10.6 million for the quarter ended September 30, 2025, compared to $8.4 million for the same quarter in 2024. The increase is primarily due to increased expenses relating to technical development activities and employee expenses, partly offset by a decrease in clinical development expenses.
 


General and administrative expenses
 
G&A expenses were $6.0 million for the quarter ended September 30, 2025, compared to $4.2 million for the same quarter in 2024. The increase is primarily due to an increase in professional fees and employee expenses.
 
Net loss
 
Net loss was $14.0 million, or $0.23 loss per share, for the quarter ended September 30, 2025, compared to $12.1 million, or $0.23 loss per share, for the same quarter in 2024.
 
About GH Research PLC
 
GH Research PLC is a clinical-stage biopharmaceutical company dedicated to transforming the lives of patients by developing a practice-changing treatment in depression. GH Research PLC's initial focus is on developing its novel and proprietary mebufotenin therapies for the treatment of patients with treatment-resistant depression (TRD). Based on the observed clinical activity in our Phase 2b trial, where the primary endpoint was met with a MADRS reduction from baseline of -15.5 points compared with placebo on Day 8 (p<0.0001), we believe that our mebufotenin product candidates have the potential to change the way TRD is treated today.
 
About GH001
 
Our lead product candidate, GH001, is formulated for mebufotenin administration via a proprietary inhalation approach. Based on the observed clinical activity in our Phase 2b GH001-TRD-201 trial, where the primary endpoint was met with a MADRS reduction from baseline of -15.5 points compared with placebo on Day 8 (p<0.0001), we believe that GH001 has the potential to change the way TRD is treated today.
 
About GH002
 
GH002 is our mebufotenin product candidate formulated for administration via a proprietary intravenous approach. We have completed a Phase 1 trial of GH002 in healthy volunteers.
 


Forward-Looking Statements
 
This press release contains statements that are, or may be deemed to be, forward-looking statements. All statements other than statements of historical fact included in this press release, including statements regarding the clinical hold on GH001, including plans and expectations for progressing any nonclinical programs and any other work needed to lift the continuing clinical hold and the timing required for the FDA to lift such clinical hold; our targets regarding the initiation of our first global pivotal program; our business strategy, product candidates and cash runway, as well as plans and objectives of management for future operations, are forward-looking statements. Forward-looking statements appear in a number of places in this press release and include, but are not limited to, statements regarding our intent, belief or current expectations. Forward-looking statements are based on our management’s beliefs and assumptions and on information currently available to our management. Such statements are subject to risks and uncertainties, and actual results may differ materially from those expressed or implied in the forward-looking statements due to various factors, including, but not limited to, the risk that the FDA does not accept our responses to the clinical hold issues and that we will be unable to fully address the FDA’s concerns and lift the clinical hold on GH001; the risk that we may not be able to submit an IND for GH002, or to commence clinical trials in the United States on the timelines we are targeting; and those other risks described in our filings with the U.S. Securities and Exchange Commission from time to time. No assurance can be given that such future results, plans, or expectations or targets will be achieved. Such forward-looking statements contained in this press release speak only as of the date hereof. We expressly disclaim any obligation or undertaking to update these forward-looking statements contained in this press release to reflect any change in our expectations or any change in events, conditions, or circumstances on which such statements are based unless required to do so by applicable law. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements.
Investor Relations:
 
Julie Ryan
GH Research PLC
investors@ghres.com
 



GH RESEARCH PLC
 
Condensed Consolidated Interim Statement of Comprehensive Loss (Unaudited)
 
(in thousands, except share and per share amounts)
 
   
Three months ended
September 30,
   
Nine months ended
September 30,
 
   
2025
$’000
   
2024
$’000
   
2025
$’000
   
2024
$’000
 
Operating expenses
                               
Research and development
   
(10,567
)
   
(8,397
)
   
(27,377
)
   
(26,810
)
General and administration
   
(5,998
)
   
(4,224
)
   
(16,624
)
   
(10,558
)
Loss from operations
   
(16,565
)
   
(12,621
)
   
(44,001
)
   
(37,368
)
                                 
Finance income
   
2,783
     
2,535
     
8,616
     
7,760
 
Finance expense
   
(21
)
   
(181
)
   
(373
)
   
(538
)
Movement of expected credit loss
   
30
     
(2
)
   
24
     
45
 
Foreign exchange (loss)/gain
   
(247
)
   
(1,845
)
   
1,613
     
(58
)
Total other income
   
2,545
     
507
     
9,880
     
7,209
 
                                 
Loss before tax
   
(14,020
)
   
(12,114
)
   
(34,121
)
   
(30,159
)
Tax charge/(credit)
   
-
     
-
     
-
     
-
 
Loss for the period
   
(14,020
)
   
(12,114
)
   
(34,121
)
   
(30,159
)
                                 
Other comprehensive (expense)/income
                               
Items that may be reclassified to profit or loss
                               
Fair value movement on marketable securities
   
(33
)
   
908
     
(55
)
   
258
 
Currency translation adjustment
   
(63
)
   
1,622
     
926
     
(113
)
Total comprehensive loss for the period
   
(14,116
)
   
(9,584
)
   
(33,250
)
   
(30,014
)
                                 
Attributable to owners:
                               
Loss for the period
   
(14,020
)
   
(12,114
)
   
(34,121
)
   
(30,159
)
Total comprehensive loss for the period
   
(14,116
)
   
(9,584
)
   
(33,250
)
   
(30,014
)
                                 
Loss per share
                               
Basic and diluted loss per share (in USD)
   
(0.23
)
   
(0.23
)
   
(0.56
)
   
(0.58
)




GH RESEARCH PLC
 
Condensed Consolidated Interim Balance Sheet (Unaudited)
 
(in thousands)
 
   
At September 30,
   
At December 31,
 
   
2025
$’000
   
2024
$’000
 
ASSETS
               
Current assets
               
Cash and cash equivalents
   
249,654
     
100,791
 
Other financial assets
   
-
     
19,387
 
Marketable securities
   
38,853
     
29,146
 
Other current assets
   
6,283
     
4,901
 
Total current assets
   
294,790
     
154,225
 
Non-current assets
               
Marketable securities
   
5,378
     
33,300
 
Property, plant and equipment
   
692
     
748
 
Other non-current assets
   
1,162
     
-
 
Total non-current assets
   
7,232
     
34,048
 
Total assets
   
302,022
     
188,273
 
                 
LIABILITIES AND EQUITY
               
Current liabilities
               
Trade payables
   
3,837
     
3,741
 
Lease liability
   
365
     
255
 
Other current liabilities
   
6,206
     
4,957
 
Total current liabilities
   
10,408
     
8,953
 
Non-current liabilities
               
Lease liability
   
217
     
369
 
Total non-current liabilities
   
217
     
369
 
Total liabilities
   
10,625
     
9,322
 
                 
Equity attributable to owners
               
Share capital
   
1,551
     
1,301
 
Additional paid-in capital
   
431,061
     
291,463
 
Other reserves
   
10,708
     
5,194
 
Foreign currency translation reserve
   
(11,635
)
   
(12,561
)
Accumulated deficit
   
(140,288
)
   
(106,446
)
Total equity
   
291,397
     
178,951
 
Total liabilities and equity
   
302,022
     
188,273
 
 


EX-99.4 5 ef20057691_ex99-4.htm EXHIBIT 99.4
Exhibit 99.4

 GH Research PLC (NASDAQ: GHRS)  November 2025  Corporate Presentation  2025© GH Research PLC  1 
 

 Any statements contained herein that do not describe historical facts are forward-looking statements that are based on management’s expectations and are subject to certain factors, risks and uncertainties that may cause actual results, outcomes, timing and performance to differ materially from those expressed or implied by such statements. These factors, risks and uncertainties include, but are not limited to: the risk that the FDA does not accept our responses to the clinical hold issues and that we will be unable to fully address the FDA’s concerns and lift the clinical hold on GH001; the risk that we may not be able to submit an IND for GH002, or to commence clinical trials in the United States on the timelines we are targeting; the costs and uncertainties associated with GH Research’s research and development efforts; the inherent uncertainties associated with the conduct, timing and results of nonclinical and clinical studies of GH Research’s product candidates; GH Research’s expectations related to commencing trials in the US; GH Research’s ability to obtain, maintain, enforce and defend issued patents; the adequacy of GH Research’s capital resources, the availability of additional funding and GH Research’s cash runway; and other factors, risks and uncertainties described in GH Research’s filings with the U.S. Securities and Exchange Commission.   Except as otherwise noted, these forward-looking statements speak only as of the date of this presentation, and GH Research undertakes no obligation to update or revise any of such statements to reflect events or circumstances occurring after this presentation. Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified and some of which are beyond GH Research’s control, you should not rely on these forward-looking statements as predictions of future events. The events and circumstances reflected in any such forward-looking statements may not be achieved or occur and actual results could differ materially from those projected in the forward-looking statements. GH Research cautions you not to place undue reliance on the forward-looking statements contained in this presentation.  This presentation has been prepared by GH Research PLC (“GH Research”). Nothing contained in this presentation is, or should be construed as, a recommendation, promise or representation by the presenter or GH Research or any director, employee, agent, or adviser of GH Research. This presentation does not purport to be all-inclusive or to contain all of the information you may desire.  This presentation does not constitute an offer to sell or the solicitation of an offer to buy securities, nor shall there be any sale of securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.  This presentation contains forward-looking statements, all of which are qualified in their entirety by this cautionary statement. Many of the forward-looking statements contained herein can be identified by the use of forward-looking words such as “may”, “anticipate”, “believe”, “could”, “expect”, “should”, “plan”, “intend”, “estimate”, “will”, “potential” and “ongoing”, among others, although not all forward-looking statements contain these identifying words.  Disclaimer Regarding Forward-Looking Statements  2  2025© GH Research PLC 
 

 Product Candidate  Indication  Preclinical  Phase 1  Phase 2a Phase 2b  Phase 3  Current Status  Milestone  GH001  Mebufotenin for inhalation administration  Treatment-resistant depression (TRD)  Phase 2b RDBPC completed  Phase 1 PK trial with proprietary device ongoing  Phase 3 initiation in 2026   Phase 1 PK trial completion  Postpartum depression (PPD)  Phase 2a POC  Completed  Bipolar II Disordera (BDII)  Phase 2a POC  Completed  GH002  Mebufotenin for i.v. administration  Psychiatric disorder  Phase 1 HV trial completed  IND submission  Pipeline  3  aBipolar II disorder with a current major depressive episode.  Abbreviations: HV = Healthy volunteer; IND = Investigational New Drug; i.v. = Intravenous; PK = Pharmacokinetics; POC = Proof-of-concept; RDBPC = Randomized, double-blind, placebo-controlled.  2025© GH Research PLC  Cash, cash equivalents and marketable securities were $293.9 million as of September 30, 2025  Completed  In Planning 
 

 SPRAVATO® has Been Established as a $1-5 Bn Drug in Interventional Psychiatry  4  2024 Worldwide Sales: $1.077 Bn   2025 Worldwide Sales (Q1-Q3): $1.193 Bn   Estimated annual WAC of $32,400  -4.0  Approved for TRD Monotherapy and in Conjunction with an Oral Antidepressant  -4.0 MADRS Points Mean Δ to Control Group  aBaseline mean MADRS = 37.  Abbreviations: AD = Antidepressant; Bn = Billion; INTL = International; LS = Least square; MADRS = Montgomery–Åsberg Depression Rating Scale; Q = Quarterly; TRD = Treatment-resistant depression; US = United States; WAC = Wholesale acquisition cost.  1. Popova et al., Am J Psychiatry 2019. 2. Institute for Clinical and Economic Review (ICER) Final Evidence Report, 2019. 3. SPRAVATO® Prescribing Information. 4. Johnson & Johnson Quarterly Earnings Reports, 2022-2025.  Placebo + oral AD  Esketamine, 56 mg or 86 mg + oral AD  LS Mean Change in MADRS from Baselinea  2025© GH Research PLC  Quarterly Sales ($ Million) 
 

 5  Retreatment of up to five GH001 IDRs if patients met retreatment criteriaa  Open-Label Extension (OLE)  N=81  Randomization 1:1  GH001 IDR  Placebo IDR   BL  2h  Day 1  Primary endpoint   ΔMADRS  Day 8  During the OLE, patients attended visits at Day 15, Month 1, 2, 3, 4, 5 & 6b  Additional clinic visits could be scheduled if required for medical reasons  MADRS  assessment  Month 6  D2  Day 2  Double-Blind Partc  This trial was conducted under the supervision of qualified healthcare professionals, providing psychological support per standard of care, but without any planned psychotherapeutic intervention before, during, or after dosing  All patients directly transitioned from the double-blind part to the OLE  GH001-TRD-201: A Randomized, Double-Blind, Placebo-Controlled, Phase 2b Trial with an Open-Label Extension  aRetreatment criteria: MADRS score >18, or MADRS score >10 and ≤18 and MADRS score ≤10 not observed at Day 8 of the prior treatment or at any visit since, or MADRS score >10 and ≤18 and MADRS score >18 observed since the most recent observation of MADRS score ≤10. bPatients also attended assessment visits on Day 2 (phone call) and Day 8 after each retreatment. cEfficacy assessments were carried out by independent blinded raters in the double-blind part.  Abbreviations: BL = Baseline; D = Day; h = Hour; IDR = Individualized dosing regimen; MADRS = Montgomery–Åsberg Depression Rating Scale.   ClinicalTrials.gov. https://clinicaltrials.gov/study/NCT05800860, Accessed March 13, 2025.   2025© GH Research PLC 
 

 Primary Endpoint: GH001 Led to Mean MADRS Reduction from Baseline of -15.5 on Day 8a vs Placebo (P<0.0001)  aFDA Guidance notes that efficacy with rapid-acting antidepressants generally should be demonstrated within 1 week, supporting a primary efficacy endpoint within this timeframe.  Abbreviations: BL = Baseline; FDA = Food and Drug Administration; H = Hours; LS = Least squares; MADRS = Montgomery-Åsberg Depression Rating Scale; SE = Standard error.  FDA Guidance: Major Depressive Disorder: Developing Drugs for Treatment. https://www.fda.gov/media/113988/download. Accessed on 26 June 2025.  LS mean difference vs placebo: −15.5 (P<0.0001)  Effect size: Cohen’s d = −2.0  LS Mean (±SE) Change from Baseline in MADRS Total Score  BL  2H  Day 2  Day 8  GH001 (n=40)  Placebo (n=41)  2025© GH Research PLC  6 
 

 ****P<0.0001  2 Hours  Day 2  Day 8  Remission Response  GH001  Placebo  ****  ****  ****  ****  ****  ****  Remission Response  Remission Response  NNT=2  NNT=2  NNT=2  Remission is defined as a MADRS total score of ≤10. Response is defined as a ≥50% reduction from baseline in MADRS total score.  Abbreviations: MADRS = Montgomery-Åsberg Depression Rating Scale; NNT = Number needed to treat.   Secondary Endpoint: GH001 Led to 57.5% Remission Rate and 60% Response Rate at Day 8 vs 0% with Placebo  NNT=2  NNT=2  2025© GH Research PLC  7 
 

 8  There was a 73% Remission Rate at 6 Months in OLE Completers  aIncludes 63 patients who completed the 6-month OLE per protocol (18 patients terminated early are excluded). bApproximately 6 months post-study start (median 168 days from Day 1 of double-blind part). cRemission defined as MADRS total score ≤10.   Abbreviations: MADRS = Montgomery-Åsberg Depression Rating Scale; OLE = Open-label extension.  Double-blind  n=40 patients who received GH001  OLE  n=63 OLE completersa  Day 8  Month 6b  Percentage of Patients in Remissionc  Patients who completed the OLE received a mean of four treatments, with 63.5% (40/63) requiring one to four treatments during the 6 months  2025© GH Research PLC 
 

 Initial Remitters  N=40  Initial Non-Remitters  N=23  Percentage of Patients in Remissionc  9  Remission Rate at 6 Monthsa in OLE Completersb  a‘6 Months’ or ‘Month 6’ (end of trial) was at approximately 6 months post-study start (median 168 days from Day 1 of double-blind part). bIncludes 63 patients who completed the 6-month OLE per protocol (18 patients terminated early are excluded). cRemission defined as a MADRS total score ≤10.   Abbreviations: MADRS = Montgomery-Åsberg Depression Rating Scale; OLE = Open-label extension.  Patients who had remission on Day 8 after their first active treatment had a 90% remission rate at 6 Months.  (90% of the OLE Completersc who had remissiona at Day 8 after first active treatmentd, also had Remission at 6 Monthsb.) 
 

 Abbreviations: OLE = Open-label extension; SAE = Serious adverse event; TEAE = Treatment-emergent adverse event.  Summary of Safety in Double-Blind and Open-Label Extension  2025© GH Research PLC  All patients completed the double-blind part and automatically transitioned to the OLE  No TEAEs of suicidal intent or suicidal behavior occurred  Across the double-blind and OLE, patients were deemed discharge ready by 1 hour from dose administration at 99% of treatment visits (>250 GH001 treatments in 81 patients)  There were no treatment-related SAEs during the 6-month duration of the trial.   10  All Rights Reserved 
 

 GH001  Based on ESCAPE-TRD data & ICER estimate  Treatment visits in 6 months  4 visitsa  23 visitsc,d  73.0% remission at 6 monthsb  83% Fewer Treatment Visits With GH001 Than With Spravato®  Note: To-date, no head-to-head comparisons of any other products to any of our product candidates have been completed in any clinical trial; results have been obtained from different trials with different designs, endpoints, and patient populations; results may not be comparable.  aFour GH001 visits deduced from the mean total number of treatments received by patients who completed the OLE and were in remission at 6-months of the GH001-TRD-201 trial. b‘6 months’ (end of trial) was at approximately 6 months post-study start (median 168 days from Day 1 of double-blind part). cSPRAVATO® Assumes 23 treatment visits, as per standard initiation protocol of eight and four sessions in Months 1 and 2, respectively, and ICER assumed maintenance treatment frequency of 2.86 treatments per month for Months 3-6.1,2,3 dRemission defined as MADRS ≤10; Spravato® 32-Week remission rates from ESCAPE-TRD trial were 49.1% remission at 32 weeks (55.0% with LOCF method)4.  Abbreviations: ICER = Institute for Clinical and Economic Review; LOCF = Last observation carried forward; MADRS = Montgomery-Åsberg Depression Rating Scale; OLE = Open-label extension; TRD = Treatment-resistant depression.  1. Johnson & Johnson Spravato Access, Coding and Reimbursement Guide. 2. ICER Spravato® Final Evidence Report. 3. Janssenscience.com, Dosage and Administration of Spravato, Duration of Therapy. 4. Reif et al. New Engl J Med 2023.  Four visitsa  73% remission at 6 monthsb,d  2025© GH Research PLC  SPRAVATO®  Based on ICER estimate  11  All Rights Reserved 
 

 Median Duration of the Psychoactive Experience of 11 minutes (Double-Blind & OLE treatments)   Note: To-date, no head-to-head comparisons of any other products to any of our product candidates have been completed in any clinical trial; results have been obtained from different trials with different designs, endpoints, and patient populations; results may not be comparable.  aAssumption of BPL-003 duration of ~90min psychoactive phase from Phase 1 SDI results as reported in Rucker et al., 2024. bVLS-01 duration of 90-120 minutes psychoactive experience from Phase 1b results, mean SIRS scores graph, (atai Life Sciences Corporate Presentation, October 2025). cCOMP360 duration of ~6h from Compass Pathways website, which states “The psilocybin experience typically lasts 6 to 8 hours”.  Abbreviations: h = Hours; min = Minutes; OLE = Open-label extension; SDI = Subjective drug intensity; SIRS = Subjective Intensity Rating Scale; TRD = Treatment-resistant depression.   12  2025© GH Research PLC  All Rights Reserved  GH001  2h  3h  4h  5h  6h  BPL-003a  VLS-01b  COMP360c  11 min median  1h  Duration of Psychoactive Experience (approximate average)  45-90min  90-120min  6-8 hours  7h  8h 
 

 Potential Value-Add for GH001 in TRD  Best in Therapeutic Category (TRD)  Efficacy: Pbo-adj MADRS Δ of -15.5 with GH001 vs -6.8 with Spravato monotherapya vs ~-4 with oral ADb  Length of PsE: Median of 11 mins with GH001 vs ~1.5 hours with Spravatoc  No additional psychotherapy/therapist visits with GH001; 83% fewer treatment visits with GH001 than with Spravatod  Best in Class (Psychedelics)  Efficacy: Pbo-adj MADRS Δ of -15.5 with GH001 vs -3.6 with COMP360 (Phase 3 data)e  Length of PsE: Median of 11 mins with GH001 vs 6-8 hours for COMP360g vs 45-90 mins for BPL-003f  No additional psychotherapy/therapists visits with GH001  Best in Molecule (Mebufotenin; 5-MeO-DMT)  Efficacy: Day 8 remission rate of 57.5% with GH001 vs 26% with BPL-003 8 mg doseh   Length of PsE: Median of 11 mins with GH001 vs 45-90 mins for BPL-003f  No additional psychotherapy/therapists visits with GH001  Note: To-date, no head-to-head comparisons of any other products to any of our product candidates have been completed in any clinical trial; results have been obtained from different trials with different designs, endpoints, and patient populations; results may not be comparable.  aSpravato® monotherapy data for 84mg dose from TRD4005 trial, presented at ECNP 2024. bAuvelity, data at Week 6 GEMINI trial, Iosifescu et al., 2022. cDissociative effects/perceptual disturbances, Popova et al., Am J Psychiatry 2019. dAssumes 23 treatment visits, as per standard initiation protocol of 8 & 4 sessions in Months 1 and 2, respectively, and ICER assumed maintenance treatment frequency of 2.86 treatments per month for Months 3-6. See slide 11. eCompass Pathways press release June 23, 2025. fBPL-003 duration assumption from Phase 1 SDI results as reported in Rucker et al., 2024. gCOMP360 duration assumption from Compass Pathways website, which states “The psilocybin experience typically lasts 6 to 8 hours”. hAtai Corporate Deck, July 2025.  Abbreviations: ICER = Institute for Clinical and Economic Review; MADRS = Montgomery-Åsberg Depression Rating Scale; PsE = Psychoactive effect; SDI = Subjective drug intensity; TRD = Treatment-resistant depression; AD = antidepressant;  Pbo-adj = placebo-adjusted.  13  2025© GH Research PLC 
 

 Three-Layer Protection Strategy  14  LAYER 1: REGULATORY EXCLUSIVITY  FDA: 5 years (+2.5 years paragraph IV stay)  EMA: 10 years (+1 year for new indication)  LAYER 2: PATENTS  Granted patents and patent applications relating to mebufotenin, including:   Novel uses in various disorders (including inhaled, nasal, buccal, sublingual, i.v., i.m., s.c. routes)   Novel aerosol compositions of matter  Novel manufacturing methods and novel salt forms   Novel device-related​ aspects  LAYER 3: TECHNICALComplex bioequivalence for systemically-acting inhalation/intranasal products with high intra- and inter-subject variability  Abbreviations: EMA = European Medicines Agency; FDA = Food and Drug Administration; i.v. = Intravenous; i.m. = Intramuscular; s.c. = Subcutaneous.  2025© GH Research PLC