CURI

SEC source: 0002154205-26-000008 · wk-form4a_1789678396.xml · derivative · entry 1

Piche Sean Adam · CIK 0002154205 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,000

Underlying: Common Stock · 150,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On September 1, 2026, the Company granted Mr. Piche 150,000 RSUs under the Company's Inducement Equity Incentive Plan. The RSUs will vest in four tranches of 75,000 on the first anniversary of the grant date, and 25,000 each on the second, third and fourth anniversaries of the grant date.

F1 · derivative.exercise_date: On September 1, 2026, the Company granted Mr. Piche 150,000 RSUs under the Company's Inducement Equity Incentive Plan. The RSUs will vest in four tranches of 75,000 on the first anniversary of the grant date, and 25,000 each on the second, third and fourth anniversaries of the grant date.

F1 · derivative.expiration_date: On September 1, 2026, the Company granted Mr. Piche 150,000 RSUs under the Company's Inducement Equity Incentive Plan. The RSUs will vest in four tranches of 75,000 on the first anniversary of the grant date, and 25,000 each on the second, third and fourth anniversaries of the grant date.

SEC source: 0002154205-26-000006 · wk-form4_1789588301.xml · derivative · entry 1

Piche Sean Adam · CIK 0002154205 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,000

Underlying: Common Stock · 150,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On September 1, 2026, the Company granted Mr. Piche 150,000 RSUs under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 75,000 on the first anniversary, and 25,000 each on the second, third and fourth anniversaries of the grant date.

F1 · derivative.exercise_date: On September 1, 2026, the Company granted Mr. Piche 150,000 RSUs under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 75,000 on the first anniversary, and 25,000 each on the second, third and fourth anniversaries of the grant date.

F1 · derivative.expiration_date: On September 1, 2026, the Company granted Mr. Piche 150,000 RSUs under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 75,000 on the first anniversary, and 25,000 each on the second, third and fourth anniversaries of the grant date.

SEC source: 0001628280-26-059745 · wk-form4_1788280168.xml · nonDerivative · entry 1

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,021,260

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.56 to $2.62, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote to this Form 4.

SEC source: 0001628280-26-059526 · wk-form4_1788198076.xml · nonDerivative · entry 1

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,001,260

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.52 to $2.57, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote to this Form 4.

SEC source: 0001628280-26-050911 · wk-form4_1785425706.xml · derivative · entry 3

Cudahy Theresa Ellen · CIK 0001827522 · COO and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 562,500

Underlying: Common Stock · 187,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On July 25, 2025, the Company granted Ms. Cudahy 750,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 187,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 187,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.exercise_price: On July 24, 2026, the first tranche of 187,500 RSUs vested on the first anniversary of the grant date and these RSUs were settled on a one-for-one basis in shares of the Company's common stock on July 28, 2026.

F1 · price: On July 25, 2025, the Company granted Ms. Cudahy 750,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 187,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 187,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · price: On July 24, 2026, the first tranche of 187,500 RSUs vested on the first anniversary of the grant date and these RSUs were settled on a one-for-one basis in shares of the Company's common stock on July 28, 2026.

F1 · derivative.exercise_date: On July 25, 2025, the Company granted Ms. Cudahy 750,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 187,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 187,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.exercise_date: On July 24, 2026, the first tranche of 187,500 RSUs vested on the first anniversary of the grant date and these RSUs were settled on a one-for-one basis in shares of the Company's common stock on July 28, 2026.

F1 · derivative.expiration_date: On July 25, 2025, the Company granted Ms. Cudahy 750,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 187,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 187,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.expiration_date: On July 24, 2026, the first tranche of 187,500 RSUs vested on the first anniversary of the grant date and these RSUs were settled on a one-for-one basis in shares of the Company's common stock on July 28, 2026.

SEC source: 0001628280-26-050911 · wk-form4_1785425706.xml · nonDerivative · entry 2

Cudahy Theresa Ellen · CIK 0001827522 · COO and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 643,749

F3 · shares: Represents the withholding of shares of the Company's common stock for tax purposes in connection with the vesting of restricted stock units previously granted.

SEC source: 0001628280-26-050911 · wk-form4_1785425706.xml · nonDerivative · entry 1

Cudahy Theresa Ellen · CIK 0001827522 · COO and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 696,380

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: On July 25, 2025, the Company granted Ms. Cudahy 750,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 187,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 187,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · price: On July 24, 2026, the first tranche of 187,500 RSUs vested on the first anniversary of the grant date and these RSUs were settled on a one-for-one basis in shares of the Company's common stock on July 28, 2026.

SEC source: 0001628280-26-050205 · wk-form4_1785270835.xml · nonDerivative · entry 4

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by P. Brady Hayden Revocable Trust, of which Mr. Hayden is the trustee.

Disclosed balance after: 80,931

F4 · shares: Reflects the exempt transfer of 9,664 shares from Mr. Hayden to P. Brady Hayden Revocable Trust on July 27, 2026, for no consideration. The reporting person is trustee of the trust and the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

F4 · price: Reflects the exempt transfer of 9,664 shares from Mr. Hayden to P. Brady Hayden Revocable Trust on July 27, 2026, for no consideration. The reporting person is trustee of the trust and the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

F4 · ownership.direct: Reflects the exempt transfer of 9,664 shares from Mr. Hayden to P. Brady Hayden Revocable Trust on July 27, 2026, for no consideration. The reporting person is trustee of the trust and the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

SEC source: 0001628280-26-050205 · wk-form4_1785270835.xml · nonDerivative · entry 3

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F4 · shares: Reflects the exempt transfer of 9,664 shares from Mr. Hayden to P. Brady Hayden Revocable Trust on July 27, 2026, for no consideration. The reporting person is trustee of the trust and the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

F4 · price: Reflects the exempt transfer of 9,664 shares from Mr. Hayden to P. Brady Hayden Revocable Trust on July 27, 2026, for no consideration. The reporting person is trustee of the trust and the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

F4 · ownership.direct: Reflects the exempt transfer of 9,664 shares from Mr. Hayden to P. Brady Hayden Revocable Trust on July 27, 2026, for no consideration. The reporting person is trustee of the trust and the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

SEC source: 0001628280-26-050202 · wk-form4_1785270682.xml · derivative · entry 3

Reed Rebecca R · CIK 0002051144 · Gen Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,500

Underlying: Common Stock · 37,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On July 25, 2025, the Company granted Ms. Reed 150,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 37,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 37,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.exercise_price: On July 24, 2026, the first tranche of 37,500 RSUs vested on the first anniversary of the grant date.

F1 · price: On July 25, 2025, the Company granted Ms. Reed 150,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 37,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 37,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · price: On July 24, 2026, the first tranche of 37,500 RSUs vested on the first anniversary of the grant date.

F1 · derivative.exercise_date: On July 25, 2025, the Company granted Ms. Reed 150,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 37,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 37,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.exercise_date: On July 24, 2026, the first tranche of 37,500 RSUs vested on the first anniversary of the grant date.

F1 · derivative.expiration_date: On July 25, 2025, the Company granted Ms. Reed 150,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 37,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 37,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.expiration_date: On July 24, 2026, the first tranche of 37,500 RSUs vested on the first anniversary of the grant date.

SEC source: 0001628280-26-050202 · wk-form4_1785270682.xml · nonDerivative · entry 2

Reed Rebecca R · CIK 0002051144 · Gen Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,533

F3 · shares: Represents the withholding of shares of the Company's common stock for tax purposes in connection with the vesting of restricted stock units previously granted.

SEC source: 0001628280-26-050202 · wk-form4_1785270682.xml · nonDerivative · entry 1

Reed Rebecca R · CIK 0002051144 · Gen Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,638

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: On July 25, 2025, the Company granted Ms. Reed 150,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 37,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 37,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · price: On July 24, 2026, the first tranche of 37,500 RSUs vested on the first anniversary of the grant date.

SEC source: 0001628280-26-050205 · wk-form4_1785270835.xml · derivative · entry 6

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,500

Underlying: Common Stock · 17,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On July 25, 2025, the Company granted Mr. Hayden 70,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 17,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 17,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.exercise_price: On July 24, 2026, 17,500 RSUs vested on the first anniversary of the grant date..

F1 · price: On July 25, 2025, the Company granted Mr. Hayden 70,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 17,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 17,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · price: On July 24, 2026, 17,500 RSUs vested on the first anniversary of the grant date..

F1 · derivative.exercise_date: On July 25, 2025, the Company granted Mr. Hayden 70,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 17,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 17,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.exercise_date: On July 24, 2026, 17,500 RSUs vested on the first anniversary of the grant date..

F1 · derivative.expiration_date: On July 25, 2025, the Company granted Mr. Hayden 70,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 17,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 17,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · derivative.expiration_date: On July 24, 2026, 17,500 RSUs vested on the first anniversary of the grant date..

SEC source: 0001628280-26-050205 · wk-form4_1785270835.xml · nonDerivative · entry 2

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,664

F3 · price: Represents the withholding of shares of the Company's common stock for tax purposes in connection with the vesting of restricted stock units previously granted.

SEC source: 0001628280-26-050205 · wk-form4_1785270835.xml · nonDerivative · entry 1

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,500

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: On July 25, 2025, the Company granted Mr. Hayden 70,000 restricted stock units ("RSUs") under the Company's 2020 Omnibus Incentive Plan. The RSUs granted may vest in four tranches of 17,500 each upon the date the Board determines that the applicable performance condition has been achieved: (i) the common stock of the Company achieves a 10-day volume weighted average price (VWAP) of $6.50; (ii) the common stock achieves a 10-day VWAP of $7.50; (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. In the event that the Performance Conditions are not met, the RSUs granted will vest in four equal installments of 17,500 on each of the first, second, third and fourth anniversaries of the grant date, and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F2 · price: On July 24, 2026, 17,500 RSUs vested on the first anniversary of the grant date..

SEC source: 0001628280-26-043613 · wk-form4_1781644129.xml · nonDerivative · entry 1

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · Held by P. Brady Hayden Revocable Trust, of which Mr. Hayden is the trustee.

Disclosed balance after: 71,267

F1 · shares: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.525 to $2.598, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4.

F2 · shares: Shares were sold for tax planning purposes.

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.525 to $2.598, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4.

F2 · price: Shares were sold for tax planning purposes.

F3 · ownership.nature: The reporting person is trustee of the trust, and the reporting person is the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

SEC source: 0001628280-26-043612 · wk-form4_1781644109.xml · nonDerivative · entry 1

Keeley Patrick J. · CIK 0001827521 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 188,450

F1 · kind: On June 12, 2026, the Company purchased 31,559 shares directly from Mr. Keeley under the Company's share repurchase program. The per-share price was based on a five-day volume-weighted average price calculated as of the transaction date in a transaction approved by the Audit Committee of the Company's Board of Directors.

F1 · price: On June 12, 2026, the Company purchased 31,559 shares directly from Mr. Keeley under the Company's share repurchase program. The per-share price was based on a five-day volume-weighted average price calculated as of the transaction date in a transaction approved by the Audit Committee of the Company's Board of Directors.

SEC source: 0001628280-26-039455 · wk-form4_1780344242.xml · nonDerivative · entry 1

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,971,260

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.75 to $2.78, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote to this Form 4.

SEC source: 0001628280-26-039135 · wk-form4_1780084966.xml · nonDerivative · entry 1

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,945,516

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.68 to $2.775, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote to this Form 4.

SEC source: 0001628280-26-038781 · wk-form4_1779998461.xml · nonDerivative · entry 1

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,851,260

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.59 to $2.70, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote to this Form 4.

SEC source: 0001628280-26-017677 · wk-form4_1773431718.xml · derivative · entry 3

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,200,000

Underlying: Common Stock · 600,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: 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 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 ("Agreement") will be cancelled. The dividend equivalents rights entitle Mr. Stinchcomb to payout of dividends accrued on each unvested RSU to the extent such RSUs vest and are distributed under the Agreement.

F2 · derivative.exercise_price: On March 10, 2026, the Board determined that the Company met the second performance condition of the award by achieving 40% revenue growth and 35% adjusted free cash flow growth for the full year 2025 compared to 2024, and thereby triggering the vesting of the second tranche of the Award, or 600,000 RSUs.

F1 · price: 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 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 ("Agreement") will be cancelled. The dividend equivalents rights entitle Mr. Stinchcomb to payout of dividends accrued on each unvested RSU to the extent such RSUs vest and are distributed under the Agreement.

F2 · price: On March 10, 2026, the Board determined that the Company met the second performance condition of the award by achieving 40% revenue growth and 35% adjusted free cash flow growth for the full year 2025 compared to 2024, and thereby triggering the vesting of the second tranche of the Award, or 600,000 RSUs.

F1 · derivative.exercise_date: 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 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 ("Agreement") will be cancelled. The dividend equivalents rights entitle Mr. Stinchcomb to payout of dividends accrued on each unvested RSU to the extent such RSUs vest and are distributed under the Agreement.

F2 · derivative.exercise_date: On March 10, 2026, the Board determined that the Company met the second performance condition of the award by achieving 40% revenue growth and 35% adjusted free cash flow growth for the full year 2025 compared to 2024, and thereby triggering the vesting of the second tranche of the Award, or 600,000 RSUs.

F1 · derivative.expiration_date: 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 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 ("Agreement") will be cancelled. The dividend equivalents rights entitle Mr. Stinchcomb to payout of dividends accrued on each unvested RSU to the extent such RSUs vest and are distributed under the Agreement.

F2 · derivative.expiration_date: On March 10, 2026, the Board determined that the Company met the second performance condition of the award by achieving 40% revenue growth and 35% adjusted free cash flow growth for the full year 2025 compared to 2024, and thereby triggering the vesting of the second tranche of the Award, or 600,000 RSUs.

SEC source: 0001628280-26-017677 · wk-form4_1773431718.xml · nonDerivative · entry 2

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,821,260

F3 · shares: Represents the withholding of shares of the Company's common stock for tax purposes in connection with the vesting of restricted stock units previously granted

SEC source: 0001628280-26-017677 · wk-form4_1773431718.xml · nonDerivative · entry 1

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,017,998

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: 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 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 ("Agreement") will be cancelled. The dividend equivalents rights entitle Mr. Stinchcomb to payout of dividends accrued on each unvested RSU to the extent such RSUs vest and are distributed under the Agreement.

F2 · price: On March 10, 2026, the Board determined that the Company met the second performance condition of the award by achieving 40% revenue growth and 35% adjusted free cash flow growth for the full year 2025 compared to 2024, and thereby triggering the vesting of the second tranche of the Award, or 600,000 RSUs.

SEC source: 0001628280-26-007777 · wk-form4_1770934013.xml · derivative · entry 1

Reed Rebecca R · CIK 0002051144 · Gen Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Common Stock · 30,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On February 10, 2026, the Company granted Ms. Reed 30,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 7,500 each on the first, second, third and fourth anniversaries of the grant date. Each RSU represents the right to receive one share of common stock and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F1 · derivative.exercise_date: On February 10, 2026, the Company granted Ms. Reed 30,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 7,500 each on the first, second, third and fourth anniversaries of the grant date. Each RSU represents the right to receive one share of common stock and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F1 · derivative.expiration_date: On February 10, 2026, the Company granted Ms. Reed 30,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 7,500 each on the first, second, third and fourth anniversaries of the grant date. Each RSU represents the right to receive one share of common stock and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

SEC source: 0001628280-26-007776 · wk-form4_1770934007.xml · derivative · entry 1

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Common Stock · 30,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On February 10, 2026, the Company granted Mr. Hayden 30,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 7,500 each on the first, second, third and fourth anniversaries of the grant date. Each RSU represents the right to receive one share of common stock and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F1 · derivative.exercise_date: On February 10, 2026, the Company granted Mr. Hayden 30,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 7,500 each on the first, second, third and fourth anniversaries of the grant date. Each RSU represents the right to receive one share of common stock and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F1 · derivative.expiration_date: On February 10, 2026, the Company granted Mr. Hayden 30,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 7,500 each on the first, second, third and fourth anniversaries of the grant date. Each RSU represents the right to receive one share of common stock and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

SEC source: 0001628280-26-007778 · wk-form4_1770934000.xml · derivative · entry 2

Vilade John Thomas Jr · CIK 0002110455 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 100,000 shares

Expires not disclosed

F2 · derivative.exercise_price: Each RSU represents the right to receive one share of common stock and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F3 · derivative.exercise_price: On February 10, 2026, the Company granted Mr. Vilade 100,000 RSUs with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 25,000 each on the first, second, third and fourth anniversaries of the grant date.

F3 · derivative.exercise_date: On February 10, 2026, the Company granted Mr. Vilade 100,000 RSUs with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 25,000 each on the first, second, third and fourth anniversaries of the grant date.

F3 · derivative.expiration_date: On February 10, 2026, the Company granted Mr. Vilade 100,000 RSUs with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs will vest in four tranches of 25,000 each on the first, second, third and fourth anniversaries of the grant date.

SEC source: 0001628280-26-007778 · wk-form4_1770934000.xml · derivative · entry 1

Vilade John Thomas Jr · CIK 0002110455 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,000

Underlying: Common Stock · 150,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On February 10, 2026, the Company granted Mr. Vilade 150,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs granted will vest in four tranches of 37,500 each upon the date the Board of Directors determines that the applicable performance condition has been achieved: (i) the Company's common stock achieves a 10-day Volume Weighted Average Price (VWAP) of $6.50 or achievement of 2026 Company annual bonus plan targets (at 100%); (ii) the common stock achieves a 10-day VWAP of $7.50 or achievement of 2027 Company annual bonus plan targets (at 100%); (iii) the common stock achieves a 10-day VWAP of $9.50 or achievement of 2028 Company annual bonus plan targets (at 100%); and (iv) the common stock achieves a 10-day VWAP of $11.50 or achievement of 2029 Company annual bonus plan targets (at 100%). Any RSUs not earned by January 31, 2030, will be cancelled.

F2 · derivative.exercise_price: Each RSU represents the right to receive one share of common stock and will be settled upon vesting (or within 30 days thereafter). All vesting events are subject to continued employment on each applicable vesting date.

F1 · derivative.exercise_date: On February 10, 2026, the Company granted Mr. Vilade 150,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs granted will vest in four tranches of 37,500 each upon the date the Board of Directors determines that the applicable performance condition has been achieved: (i) the Company's common stock achieves a 10-day Volume Weighted Average Price (VWAP) of $6.50 or achievement of 2026 Company annual bonus plan targets (at 100%); (ii) the common stock achieves a 10-day VWAP of $7.50 or achievement of 2027 Company annual bonus plan targets (at 100%); (iii) the common stock achieves a 10-day VWAP of $9.50 or achievement of 2028 Company annual bonus plan targets (at 100%); and (iv) the common stock achieves a 10-day VWAP of $11.50 or achievement of 2029 Company annual bonus plan targets (at 100%). Any RSUs not earned by January 31, 2030, will be cancelled.

F1 · derivative.expiration_date: On February 10, 2026, the Company granted Mr. Vilade 150,000 restricted stock units (RSUs) with tandem dividend equivalent rights under the Company's 2020 Omnibus Incentive Plan. The RSUs granted will vest in four tranches of 37,500 each upon the date the Board of Directors determines that the applicable performance condition has been achieved: (i) the Company's common stock achieves a 10-day Volume Weighted Average Price (VWAP) of $6.50 or achievement of 2026 Company annual bonus plan targets (at 100%); (ii) the common stock achieves a 10-day VWAP of $7.50 or achievement of 2027 Company annual bonus plan targets (at 100%); (iii) the common stock achieves a 10-day VWAP of $9.50 or achievement of 2028 Company annual bonus plan targets (at 100%); and (iv) the common stock achieves a 10-day VWAP of $11.50 or achievement of 2029 Company annual bonus plan targets (at 100%). Any RSUs not earned by January 31, 2030, will be cancelled.

SEC source: 0001628280-26-005966 · wk-form4_1770395680.xml · derivative · entry 3

Hendricks Andrew · CIK 0001841743 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,780

Underlying: Common Stock · 18,780 shares

Expires not disclosed

F2 · derivative.exercise_price: On Feb 4, 2026 the Company granted Mr. Hendricks 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.exercise_date: On Feb 4, 2026 the Company granted Mr. Hendricks 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.expiration_date: On Feb 4, 2026 the Company granted Mr. Hendricks 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · balance_after: On Feb 4, 2026 the Company granted Mr. Hendricks 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

SEC source: 0001628280-26-005966 · wk-form4_1770395680.xml · derivative · entry 2

Hendricks Andrew · CIK 0001841743 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 38,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Hendricks under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · derivative.exercise_date: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Hendricks under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · derivative.expiration_date: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Hendricks under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

SEC source: 0001628280-26-005966 · wk-form4_1770395680.xml · nonDerivative · entry 1

Hendricks Andrew · CIK 0001841743 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 163,383

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Hendricks under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · shares: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Hendricks under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · price: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Hendricks under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

SEC source: 0001628280-26-006007 · wk-form4_1770401743.xml · derivative · entry 1

HENDRICKS JOHN S · CIK 0001259263 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,439

Underlying: Common Stock · 27,439 shares

Expires not disclosed

F1 · derivative.exercise_price: On Feb 4, 2026 the Company granted Mr. Hendricks 27,439 restricted stock units under the Company's 2020 Omnibus Incentive Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F1 · derivative.exercise_date: On Feb 4, 2026 the Company granted Mr. Hendricks 27,439 restricted stock units under the Company's 2020 Omnibus Incentive Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F1 · derivative.expiration_date: On Feb 4, 2026 the Company granted Mr. Hendricks 27,439 restricted stock units under the Company's 2020 Omnibus Incentive Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F1 · balance_after: On Feb 4, 2026 the Company granted Mr. Hendricks 27,439 restricted stock units under the Company's 2020 Omnibus Incentive Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

SEC source: 0001628280-26-005997 · wk-form4_1770400263.xml · derivative · entry 3

Hendricks Elizabeth Ann · CIK 0001827456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,780

Underlying: Common Stock · 18,780 shares

Expires not disclosed

F2 · derivative.exercise_price: On Feb 4, 2026 the Company granted Ms. Saravia 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.exercise_date: On Feb 4, 2026 the Company granted Ms. Saravia 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.expiration_date: On Feb 4, 2026 the Company granted Ms. Saravia 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · balance_after: On Feb 4, 2026 the Company granted Ms. Saravia 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

SEC source: 0001628280-26-005997 · wk-form4_1770400263.xml · derivative · entry 2

Hendricks Elizabeth Ann · CIK 0001827456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 38,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On February 4, 2026, 38,500 restricted stock units previously granted to Ms. Saravia under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · derivative.exercise_date: On February 4, 2026, 38,500 restricted stock units previously granted to Ms. Saravia under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · derivative.expiration_date: On February 4, 2026, 38,500 restricted stock units previously granted to Ms. Saravia under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

SEC source: 0001628280-26-005997 · wk-form4_1770400263.xml · nonDerivative · entry 1

Hendricks Elizabeth Ann · CIK 0001827456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 172,785

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: On February 4, 2026, 38,500 restricted stock units previously granted to Ms. Saravia under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · shares: On February 4, 2026, 38,500 restricted stock units previously granted to Ms. Saravia under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · price: On February 4, 2026, 38,500 restricted stock units previously granted to Ms. Saravia under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

SEC source: 0001628280-26-005981 · wk-form4_1770398379.xml · derivative · entry 4

HUBERMAN JONATHAN · CIK 0001228716 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,341

Underlying: Common Stock · 21,341 shares

Expires not disclosed

F3 · derivative.exercise_price: On Feb 4, 2026 the Company granted Mr. Huberman 21,341 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F3 · derivative.exercise_date: On Feb 4, 2026 the Company granted Mr. Huberman 21,341 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F3 · derivative.expiration_date: On Feb 4, 2026 the Company granted Mr. Huberman 21,341 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F3 · balance_after: On Feb 4, 2026 the Company granted Mr. Huberman 21,341 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

SEC source: 0001628280-26-005981 · wk-form4_1770398379.xml · derivative · entry 3

HUBERMAN JONATHAN · CIK 0001228716 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 43,750 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Huberman under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · derivative.exercise_date: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Huberman under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · derivative.expiration_date: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Huberman under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

SEC source: 0001628280-26-005981 · wk-form4_1770398379.xml · nonDerivative · entry 1

HUBERMAN JONATHAN · CIK 0001228716 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 188,450

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Huberman under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · shares: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Huberman under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · price: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Huberman under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

SEC source: 0001628280-26-005987 · wk-form4_1770399706.xml · derivative · entry 3

Nikzad Michael · CIK 0001783048 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,780

Underlying: Common Stock · 18,780 shares

Expires not disclosed

F2 · derivative.exercise_price: On Feb 4, 2026 the Company granted Mr. Nikzad 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.exercise_date: On Feb 4, 2026 the Company granted Mr. Nikzad 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.expiration_date: On Feb 4, 2026 the Company granted Mr. Nikzad 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · balance_after: On Feb 4, 2026 the Company granted Mr. Nikzad 18,780 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

SEC source: 0001628280-26-005987 · wk-form4_1770399706.xml · derivative · entry 2

Nikzad Michael · CIK 0001783048 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 38,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Nikzad under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

F1 · derivative.exercise_date: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Nikzad under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

F1 · derivative.expiration_date: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Nikzad under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

SEC source: 0001628280-26-005987 · wk-form4_1770399706.xml · nonDerivative · entry 1

Nikzad Michael · CIK 0001783048 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 196,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Nikzad under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

F1 · shares: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Nikzad under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

F1 · price: On February 4, 2026, 38,500 restricted stock units previously granted to Mr. Nikzad under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

SEC source: 0001628280-26-005960 · wk-form4_1770394085.xml · derivative · entry 3

Blank Matthew · CIK 0001511516 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 37,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On February 4, 2026, 37,000 restricted stock units previously granted to Mr. Blank under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · derivative.exercise_date: On February 4, 2026, 37,000 restricted stock units previously granted to Mr. Blank under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · derivative.expiration_date: On February 4, 2026, 37,000 restricted stock units previously granted to Mr. Blank under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

SEC source: 0001628280-26-005960 · wk-form4_1770394085.xml · derivative · entry 2

Blank Matthew · CIK 0001511516 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,049

Underlying: Common Stock · 18,049 shares

Expires not disclosed

F2 · derivative.exercise_price: On Feb 4, 2026 the Company granted Mr. Blank 18,049 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.exercise_date: On Feb 4, 2026 the Company granted Mr. Blank 18,049 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.expiration_date: On Feb 4, 2026 the Company granted Mr. Blank 18,049 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · balance_after: On Feb 4, 2026 the Company granted Mr. Blank 18,049 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

SEC source: 0001628280-26-005960 · wk-form4_1770394085.xml · nonDerivative · entry 1

Blank Matthew · CIK 0001511516 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 168,221

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: On February 4, 2026, 37,000 restricted stock units previously granted to Mr. Blank under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · shares: On February 4, 2026, 37,000 restricted stock units previously granted to Mr. Blank under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

F1 · price: On February 4, 2026, 37,000 restricted stock units previously granted to Mr. Blank under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis.

SEC source: 0001628280-26-005972 · wk-form4_1770396752.xml · derivative · entry 3

Keeley Patrick J. · CIK 0001827521 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,341

Underlying: Common Stock · 21,341 shares

Expires not disclosed

F2 · derivative.exercise_price: On Feb 4, 2026 the Company granted Mr. Keeley 21,341 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.exercise_date: On Feb 4, 2026 the Company granted Mr. Keeley 21,341 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · derivative.expiration_date: On Feb 4, 2026 the Company granted Mr. Keeley 21,341 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

F2 · balance_after: On Feb 4, 2026 the Company granted Mr. Keeley 21,341 restricted stock units under the Plan. Each restricted stock unit represents a contingent right to receive one share of common stock. The restricted stock units granted will vest on Feb 4, 2027, and will be settled upon vesting (or within 30 days thereafter).

SEC source: 0001628280-26-005972 · wk-form4_1770396752.xml · derivative · entry 2

Keeley Patrick J. · CIK 0001827521 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 43,750 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Keeley under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

F1 · derivative.exercise_date: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Keeley under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

F1 · derivative.expiration_date: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Keeley under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

SEC source: 0001628280-26-005972 · wk-form4_1770396752.xml · nonDerivative · entry 1

Keeley Patrick J. · CIK 0001827521 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 220,009

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Keeley under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

F1 · shares: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Keeley under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

F1 · price: On February 4, 2026, 43,750 restricted stock units previously granted to Mr. Keeley under the Company's 2020 Omnibus Incentive Plan (the "Plan") vested and converted into shares of the Company's common stock on a one-for-one basis

SEC source: 0001628280-26-000186 · wk-form4_1767390505.xml · nonDerivative · entry 1

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Indirect · Held by P. Brady Hayden Revocable Trust, of which Mr. Hayden is the trustee.

Disclosed balance after: 101,667

F1 · shares: Shares sold pursuant to a 10b5-1 plan which Mr. Hayden entered into on May 30, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.73 to $3.81, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4.

F3 · ownership.nature: The reporting person is trustee of the trust, and the reporting person is the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

SEC source: 0001628280-25-057038 · wk-form4_1765834408.xml · nonDerivative · entry 1

Hayden Phillip Brady · CIK 0001938940 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Indirect · Held by P. Brady Hayden Revocable Trust, of which Mr. Hayden is the trustee.

Disclosed balance after: 119,141

F1 · shares: Shares sold pursuant to a 10b5-1 plan which Mr. Hayden entered into on May 30, 2025.

F2 · ownership.nature: The reporting person is trustee of the trust, and the reporting person is the sole beneficiary of the trust. The reporting person remains the beneficial owner of the securities held by the trust.

SEC source: 0001628280-25-056741 · wk-form4_1765573211.xml · nonDerivative · entry 1

Cudahy Theresa Ellen · CIK 0001827522 · COO and Secretary

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 508,880

F1 · shares: Shares sold pursuant to a 10b5-1 plan which Ms. Cudahy entered into on August 13, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.97 to $4.99, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4.

SEC source: 0001628280-25-053994 · wk-form4_1764106131.xml · nonDerivative · entry 1

Stinchcomb Clinton Larry · CIK 0001827441 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,417,998

F1 · shares: Sales were made for estate and tax planning purposes.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.60 to $4.70, inclusive. The reporting person undertakes to provide to CuriosityStream Inc., any security holder of CuriosityStream Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4.