Sec Form 4 Filing - Stinchcomb Clinton Larry @ CuriosityStream Inc. - 2025-07-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Stinchcomb Clinton Larry 2. Issuer Name and Ticker or Trading Symbol CuriosityStream Inc. [ CURI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) 8484 GEORGIA AVE., SUITE 700 3. Date of Earliest Transaction (MM/DD/YY) 07/15/2025 (Street) SILVER SPRING, MD20910 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units ( 1 ) ( 2 ) 07/15/2025 A 2,400,000 ( 1 )( 2 ) ( 1 )( 2 ) Common Stock 2,400,000 $ 0 2,400,000 D

Reporting Owners Reporting Owner Name / Address < b> Relationships Director 10% Owner Officer Other Stinchcomb Clinton Larry 8484 GEORGIA AVE., SUITE 700 SILVER SPRING, MD20910 X President and CEO Signatures /s/ Talha Sarhandi as attorney-in-fact for Clint Stinchcomb 07/16/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On July 15, 2025, the Company granted Mr. Stinchcomb 2,400,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the 2020 Omnibus Incentive Plan. Each RSU represents the right to receive one share of common stock. The RSUs granted are performance-based, subject to the Company's achieving certain stock price or financial performance goals. All vesting is subject to continued employment on the applicable vesting date and any RSUs not earned during the term of Mr. Stinchcomb's employment agreement will be cancelled. The dividend equivalents entitle Mr. Stinchcomb to payout of dividends accrued on each unvested RSU to the extent such RSUs vest and are distributed under the Agreement. ( 2 )The RSUs granted will vest in four equal tranches of 600,000 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the Company common stock achieves a 10 day volume weighted average price (VWAP) of $6.50, or the Company achieves 35% year over year revenue growth for the period January 1 through June 30, 2025, compared to the same period in 2024; (ii) the common stock achieves a 10-day VWAP of $7.50, or the Company achieves 40% revenue growth and 35% adjusted free cash flow growth for the full year 2025 compared to 2024; (iii) the common stock achieves a 10-day VWAP of $9.50; and (iv) the common stock achieves a 10-day VWAP of $11.50.

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