CuriosityStream (CURI) CEO receives 600K shares from RSU vesting, with tax withholding

Rhea-AI Filing Summary

CuriosityStream Inc. reported that President and CEO Clinton Larry Stinchcomb had 600,000 performance-based restricted stock units convert into common stock after the Board determined on March 10, 2026 that the company met the second performance condition tied to 2025 revenue and adjusted free cash flow growth.

In connection with this vesting, 196,738 common shares were withheld at $3.27 per share to cover tax obligations, a non-market disposition. Following these transactions, Stinchcomb owns 2,821,260 shares of CuriosityStream common stock directly.

Insider Trade Summary

600,000 shares exercised/converted

Mixed 3 txns

Insider Stinchcomb Clinton Larry

Role President and CEO

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	600,000	$0.00	--
Exercise	Common Stock	600,000	$0.00	--
Tax Withholding	Common Stock	196,738	$3.27	$643K

Holdings After Transaction: Restricted Stock Units — 1,200,000 shares (Direct); Common Stock — 3,017,998 shares (Direct)

Footnotes (1)

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 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. 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. 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

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Stinchcomb Clinton Larry

(Last) (First) (Middle)

8484 GEORGIA AVE., SUITE 700

(Street)

SILVER SPRING MD 20910

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/11/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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
Common Stock	03/11/2026		M		600,000	A	(1)(2)	3,017,998	D
Common Stock	03/11/2026		F		196,738(3)	D	$3.27	2,821,260	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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)	03/11/2026	03/11/2026	M			600,000	(1)(2)	(1)(2)	Common Stock	600,000	(1)(2)	1,200,000	D

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 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.

2. 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.

3. 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

Remarks:

	/s/ P. Brady Hayden as attorney-in-fact for Clint Stinchcomb	03/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did CuriosityStream (CURI) disclose for CEO Clinton Stinchcomb?

CuriosityStream reported that CEO Clinton Larry Stinchcomb had 600,000 performance-based RSUs convert into common stock. These units vested after the company met a second performance condition, and the resulting shares increased his direct common stock holdings while a portion was withheld for taxes.

Why did 600,000 CuriosityStream RSUs vest for Clinton Stinchcomb?

The 600,000 RSUs vested after the Board determined on March 10, 2026 that CuriosityStream achieved required 2025 performance goals. These conditions were based on 40% revenue growth and 35% adjusted free cash flow growth for full-year 2025 compared to 2024, triggering the second tranche.

How many CuriosityStream shares were withheld for taxes in this Form 4?

In connection with the RSU vesting and conversion, 196,738 shares of CuriosityStream common stock were withheld for tax purposes. The withholding price was $3.27 per share, reflecting a non-market disposition rather than an open-market sale of stock by the CEO.

What are Clinton Stinchcomb’s CuriosityStream holdings after the reported transactions?

After the March 11, 2026 transactions, Clinton Stinchcomb directly holds 2,821,260 shares of CuriosityStream common stock. This figure reflects the 600,000 newly issued shares from the RSU conversion, net of the 196,738 shares withheld to satisfy associated tax obligations on the vesting event.

How were Clinton Stinchcomb’s CuriosityStream RSUs originally granted?

On July 15, 2025, CuriosityStream granted Clinton Stinchcomb 2,400,000 performance-based RSUs under its 2020 Omnibus Incentive Plan. Each RSU represents one common share and includes dividend equivalent rights, with vesting tied to specific stock price or financial performance goals and continued employment conditions.

Was the CuriosityStream CEO’s tax-related share disposition an open-market sale?

No, the disposition was not an open-market sale. The 196,738 CuriosityStream shares were withheld by the company to cover tax liabilities arising from the RSU vesting. This type of F-code transaction reflects tax withholding mechanics rather than a discretionary sale into the market.