October 27, 2025

Philip Barros

[Address Redacted]

Dear Philip,

I am pleased to offer you the position of Chief Executive Officer of Ichor Systems, Inc. (the “Company”). Should you accept our offer, your work location will continue to be in Fremont, CA and you will report to the Board of Directors (the “Board”). The purpose of this letter is to confirm with you the specifics of your offer, consistent with the terms below. For avoidance of doubt, the terms of this Letter, if accepted, shall replace and supersede all prior offer letter arrangements between you and the Company, including that certain offer letter from the Company to you effective as of January 15, 2004, and any subsequent promotional letters that were provided during tenure prior to this offer.

Your start date for your new position is expected to be November 3, 2025.

Your work location will continue to be 3185 Laurelview Ct, Fremont, CA 94538.

Your base salary will be $26,923.08 biweekly, which when annualized is equivalent to $700,000.00 per year.

Your position will be full-time and is considered exempt for purposes of federal and state wage and hour law, which means that you will not be eligible for overtime pay.

You will continue to be eligible to participate in the Company's Incentive Bonus Plan subject to the terms and conditions of the plan at the discretion of the Board. Your target bonus will be increased to 100% of your annual base salary. Your bonus is based on companywide financial metrics and successful completion of established MBOs. The plan is subject to change at any time at the company’s discretion, in accordance with applicable law. For the 2025 bonus year, your bonus will be 100% calculated on your time as Chief Technology Officer calculated based upon your prior base salary and target bonus.

You will continue to participate in the Company’s 2025 Omnibus Equity Incentive Plan, and you are being recommended for a promotional grant with a grant-date fair value of $3,500,000.00, split equally (50%/50%) between Performance Based RSUs and Time Based RSUs. The grant date is expected to be on the Monday of the first month following your start date. The vesting schedule for the Time Based RSUs will be as follows: 25% of your Time-Based RSUs will vest on the first anniversary of your grant date, and the remaining 75% will vest quarterly thereafter such that your Time-Based RSUs are vested in four years. The Performance Based RSUs are cliff vested, and the payout amount will be determined at the end of the third year following the date of grant. You will be provided grant agreements within a month of your start date under separate cover.

You will continue participation in the health and welfare programs and the 401(k) Retirement Savings Plan. While the need is not anticipated, you will continue to be eligible under the Ichor Amended and Restated Select Severance Plan (attachment provided).

You will continue to be eligible for time off under our Executive & Senior Management Vacation Policy. There is no vacation accrual or limit under this policy, and no payout upon separation because there is no vacation accrual.

Per Company policy, your employment is considered “at will.” This means that either you or the Company may terminate the employment relationship at any time, with or without cause or notice.

You will continue to be covered by the Company’s Directors and Officers liability insurance policy to the same extent as other senior executive officers and directors of the Company in accordance with the terms and conditions of the applicable policy.

Your compensation is subject to the Company’s Clawback Policy (as amended from time to time) adopted by the Board of Directors pursuant to Rule 10D-1 under the Securities Exchange Act of 1934 and the applicable Nasdaq listing standards. You acknowledge and agree that any incentive-based compensation awarded to you may be recovered by the Company in accordance with that policy and applicable law.

With respect to the nature of your employment relationship with the Company, this letter constitutes the full, complete, and final agreement between you and the Company. Additionally, no element of the compensation plan listed above can be assigned or transferred by you to any other person, company, or entity of any type.

This letter shall be governed by the laws of the State of California.

This offer of employment, if not previously accepted by you, will expire five (5) days from the date of this letter.

If you wish to accept this offer, please sign and return this to me.

We are excited to have you lead the Ichor team and trust that this letter finds you mutually excited about your new opportunity with us! Should you have any questions, please contact me at [Phone Number Redacted].

Sincerely,

/s/ Diana Finucane

Diana Finucane Chief Human Resources Officer I, the undersigned, understand and agree to the terms and conditions of employment set forth in this letter.

I understand and agree that the terms of this letter supersede any and all prior or contemporaneous agreements and/or promises concerning the terms of my employment and that there are no other promises, expressed or implied, concerning the terms of my employment with Ichor Systems, Inc., other than those expressly set forth or reference herein.

FREMONT, CA., November 3, 2025 —Ichor Holdings, Ltd. (NASDAQ: ICHR), a leader in the design, engineering, and manufacturing of critical fluid delivery subsystems and components for semiconductor capital equipment, today announced that its Board of Directors has unanimously approved a succession plan for executive management of the company. Effective immediately, CTO Phil Barros has been promoted to chief executive officer, and appointed to the company’s Board of Directors.

Mr. Barros’ promotion to CEO comes after more than 20 years of rising through the leadership ranks at Ichor, with executive roles spanning engineering, product management, sales, account management, corporate development, and strategy. In serving as the company’s chief technical officer since 2015 and as senior vice president of engineering of Ichor since 2010, Mr. Barros led the development of the complete suite of proprietary valves, fittings, and substrate components now qualified or in final qualification stages with Ichor’s major customers. Earlier roles included several years as director of systems engineering at Celerity, a predecessor company to Ichor, and as engineering project manager at Applied Materials, Inc. Mr. Barros earned his B.S. in mechanical engineering from San Jose State University and has advanced his education through executive programs at both Stanford University and the University of California, Berkeley. A proven technology leader with a passion for innovation, Mr. Barros personally holds multiple patents. His technology background and business experience make him ideally suited to lead the next phase of the company’s growth and success.

“Phil has been instrumental in developing our technology roadmap in close partnership with our leading customers, creating innovative and proprietary products that drive customer value, and we are confident that he is the right person to drive Ichor to the next level,” said Iain MacKenzie, chairman of Ichor. “The leadership transition we are announcing today represents the culmination of a thoughtful succession planning process led by our Board over the past several months, during which time we have considered both internal and external candidates. With Ichor’s product development strategy fundamental to the company’s future revenue growth and increased profitability objectives, we believe that Phil’s deep knowledge of our business and vision for the future will help drive Ichor’s future success.”

“I am honored to have been chosen by the Board of Directors to lead Ichor into the next exciting phase of growth for our company,” said Phil Barros. “Ichor’s evolution from a value-added manufacturing partner to a leading provider of critical and proprietary components employed to address complex fluid delivery requirements for our customers, is just beginning to take shape. I look forward to working with our entire executive team and our talented employees to drive growth and increased profitability for Ichor as we execute on our vision for technology leadership.”

We are a leader in the design, engineering and manufacturing of critical fluid delivery subsystems and components primarily for semiconductor capital equipment, as well as other industries such as defense/aerospace and medical. Our primary product offerings include gas and chemical delivery subsystems, collectively known as fluid delivery subsystems, which are key elements of the process tools used in the manufacturing of semiconductor devices. Our gas delivery subsystems deliver, monitor and control precise quantities of the specialized gases used in semiconductor manufacturing processes such as etch and deposition. Our chemical delivery subsystems precisely blend and dispense the reactive liquid chemistries used in semiconductor manufacturing processes such as chemical-mechanical planarization, electroplating, and cleaning. We also provide precision-machined components, weldments, e-beam and laser welded components, precision vacuum and hydrogen brazing, surface treatment technologies, and other proprietary products. We are headquartered in Fremont, CA.

https://ir.ichorsystems.com/ Certain statements in this release are “forward-looking statements” made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The words “anticipate,” “believe,” “contemplate,” “designed,” “estimate,” “expect,” “forecast,” “goal,” “guidance,” “intend,” “may,” “outlook,” “plan,” “predict,” “project,” “see,” “seek,” “target,” “would” and similar expressions or variations or negatives of these words are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Examples of forward-looking statements include, but are not limited to, future plans for Ichor, and expressions of confidence in Ichor’s future as well as any other statement that does not directly relate to any historical fact. Such forward-looking statements are based on our current expectations about future events as of the date hereof and involve many risks and uncertainties that could cause our actual results to differ materially from those expressed or implied in our forward-looking statements. Our actual results and outcomes could differ materially from those included in these forward-looking statements as a result of various factors, including, but not limited to: risks associated with management transitions, including potential difficulties in implementing organizational changes, new strategies and tactics developed by a new management team, and possible disruptions in the event of further changes in the management team; retention efforts and relationships with external stakeholders due to the changes in our management team; challenges in attracting and retaining qualified personnel; geopolitical, economic and market conditions, including high inflation, changes to trade, fiscal and monetary policy, high interest rates, currency fluctuations, challenges in the supply chain and any disruptions in the global economy as a result of the conflicts in Ukraine and the Middle East; dependence on expenditures by manufacturers and cyclical downturns in the semiconductor capital equipment industry; reliance on a very small number of original equipment manufacturers (“OEMs”) for a significant portion of sales; negotiating leverage held by our customers; competitiveness and rapid evolution of the industries in which we participate; keeping pace with developments in the industries we serve and with technological innovation generally; designing, developing and introducing new products that are accepted by OEMs in order to retain our existing customers and obtain new customers; managing our manufacturing and procurement process effectively; defects in our products that could damage our reputation, decrease market acceptance and result in potentially costly litigation; and our dependence on a limited number of suppliers. Additional information concerning these and other factors can be found in our filings with the Securities and Exchange Commission (the “SEC”), including other risks, relevant factors, and uncertainties identified in the “Risk Factors” section of our Annual Report on Form 10 K for the year ended December 27, 2024 and any other periodic reports that we may file with the SEC.

All forward-looking statements in this press release are based upon information available to us as of the date hereof, and qualified in their entirety by this cautionary statement. We undertake no obligation to update or revise any forward-looking statements contained herein, whether as a result of actual results, changes in our expectations, future events or developments, or otherwise, except as required by law.

Greg Swyt, CFO 510-897-5200

Claire McAdams, IR & Strategic Initiatives 530-265-9899

IR@ichorsystems.com

Source: Ichor Holdings, Ltd.