X0508 4 2025-11-11 0 0001776909 CuriosityStream Inc. CURI 0001827441 Stinchcomb Clinton Larry 8484 GEORGIA AVE., SUITE 700 SILVER SPRING MD 20910 1 1 0 0 President and CEO 0 Common Stock 2025-11-11 4 M 0 603333 A 2973105 D Common Stock 2025-11-11 4 F 0 237355 3.75 D 2735750 D Restricted Stock Units 2025-11-11 4 M 0 603333 D Common Stock 603333 0 D On October 9, 2024, the Company granted Clinton Stinchcomb 905,000 performance-based restricted stock units ("RSUs") under the 2020 Omnibus Incentive Plan (the "Award"). Each RSU represents a contingent right to receive one share of common stock. On May 7, 2025, the Board determined that the Company met the first performance condition of the Award, for having then achieved more than $4,500,000 in adjusted free cash flow since October 1, 2024, and thereby triggering the vesting of one-third of the Award, or 301,667 RSUs. On November 11, 2025, the Board determined that the Company met the second performance condition of the Award, by achieving more than $9,000,000 in adjusted free cash flow between October 1, 2024 and September 30, 2025, and thereby triggering the vesting of two-thirds of the Award, or 603,333 RSUs. 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. /s/ P. Brady Hayden as attorney-in-fact for Clint Stinchcomb 2025-11-13