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Date of Report (Date of earliest event reported): August 5, 2025

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o On August 5, 2025, CuriosityStream Inc. (the "Company" or "CuriosityStream") announced its financial results for the second quarter ended June 30, 2025, in a press release dated August 5, 2025 (the "Press Release"). The full text of the Press Release is furnished as Exhibit 99.1 to this Current Report on Form 8-K (this “Current Report”) and is incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information furnished under Item 2.02 of this Current Report (including Exhibit 99.1) is deemed to be “furnished” and shall not be deemed “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall such information be deemed to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

On August 5, 2025, the Company announced that the Company's Board of Directors approved the declaration of a quarterly cash dividend of $0.08 per share of the Company's Common Stock payable on September 19, 2025, to stockholders of record on September 5, 2025.

Certain statements in this Current Report on Form 8-K may be considered “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 including, but not limited to, CuriosityStream’s expectations or predictions of future financial or business performance or conditions, plans to pay regular dividends, consumers’ valuation of factual content, and the Company’s continued success. Forward-looking statements are inherently subject to risks, uncertainties and assumptions. Generally, statements that are not historical facts, including statements concerning possible or assumed future actions, business strategies, events or results of operations, are forward-looking statements. These statements may be preceded by, followed by or include the words “believes,” “estimates,” “expects,” “projects,” “forecasts,” “may,” “will,” “should,” “seeks,” “plans,” “scheduled,” “anticipates,” “predicts” or “intends” or similar expressions. Such forward-looking statements involve risks and uncertainties that may cause actual events, results or performance to differ materially from those indicated by such statements. Certain of these risks are identified and discussed under “Risk Factors” in CuriosityStream’s Annual Report on Form 10-K for the year ended December 31, 2024, that we filed with the Securities and Exchange Commission (the “SEC”) on March 25, 2025, and in CuriosityStream’s other SEC filings. These risk factors are important to consider in determining future results and should be reviewed in their entirety. Forward-looking statements are based on the current belief of the management of CuriosityStream, based on currently available information, as to the outcome and timing of future events, and involve factors, risks, and uncertainties that may cause actual results in future periods to differ materially from such statements. However, there can be no assurance that the events, results or trends identified in these forward-looking statements will occur or be achieved. Forward-looking statements speak only as of the date they are made, and CuriosityStream is not under any obligation, and expressly disclaims any obligation to update, alter or otherwise revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law. Readers should carefully review the statements set forth in the reports that CuriosityStream has filed or will file from time to time with the SEC.

In addition to factors previously disclosed in CuriosityStream’s reports filed with the SEC and those identified elsewhere in this communication, the following factors, among others, could cause actual results to differ materially from forward-looking statements or historical performance: (i) risks related to CuriosityStream’s ability to maintain and develop new and existing revenue-generating relationships and partnerships or to significantly increase CuriosityStream’s subscriber base and retain customers; (ii) the effects of pending and future legislation; (iii) risks of the internet, online commerce and media industry; (iv) the highly competitive nature of the internet, online commerce and media industry and CuriosityStream’s ability to compete therein; (v) litigation, complaints, and/or adverse publicity; and (vi) privacy and data protection laws, privacy or data breaches, or the loss of data.

(d)Exhibits

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this Current Report to be signed on its behalf by the undersigned hereunto duly authorized.