CuriosityStream ex-officer to sell 80,931 shares

Rhea-AI Filing Summary

CuriosityStream Inc. (CURI) received a notice under Rule 144 that former officer Hayden Phillip Brady, through Fidelity Brokerage Services LLC, plans to sell 80,931 shares of CuriosityStream common stock on or after September 3, 2026 on NASDAQ, with an aggregate market value of $235,991.17.

The shares relate to restricted stock vesting events of 71,267 shares on November 11, 2025 and 9,664 shares on July 24, 2026, both received as compensation. A prior sale of 30,400 shares for $77,888.40 on June 12, 2026 was made in the P. Brady Hayden Revocable Trust account.

Key Figures

Shares to be sold: 80,931 shares Aggregate market value of planned sale: $235,991.17 Past 3 months shares sold: 30,400 shares +4 more

7 metrics

Shares to be sold 80,931 shares Common stock planned for sale on or after September 3, 2026 under Rule 144

Aggregate market value of planned sale $235,991.17 Estimated value of 80,931 CuriosityStream common shares to be sold

Past 3 months shares sold 30,400 shares Common stock sold on June 12, 2026 from the P. Brady Hayden Revocable Trust

Proceeds from past sale $77,888.40 Total consideration for 30,400 shares sold on June 12, 2026

Restricted stock vesting (2025) 71,267 shares Restricted stock vesting on November 11, 2025 received from issuer as compensation

Restricted stock vesting (2026) 9,664 shares Restricted stock vesting on July 24, 2026 received from issuer as compensation

Date of notice September 3, 2026 Date the Rule 144 notice relating to CuriosityStream common stock was filed

Key Terms

Rule 144, Restricted Stock Vesting, Revocable Trust, aggregate

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 11/11/2025 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Revocable Trust financial

"P. Brady Hayden Revocable Trust 8484 Georgia Ave Suite 700 Silver Spring MD 20910"

A revocable trust is a legal arrangement where the person who creates it keeps control and can change or cancel the trust at any time, while naming who will manage and receive the assets later. Think of it like a flexible folder for your investments and property that can be relabeled or reworked as circumstances change; it matters to investors because it determines how ownership is recorded, how easily assets transfer on incapacity or death, and whether holdings bypass public probate proceedings.

aggregate financial

"80931 | 235991.17 | 59338028 | 09/03/2026 | NASDAQ"

A combined total or summary created by adding together multiple parts or data points. Used as a noun and a verb, it means pooling individual items (sales, revenues, assets, transactions, or data) into one overall figure so stakeholders can see the big picture; like pouring many small jars into a single container to measure the total amount. Aggregate figures matter to investors because they show the overall size, trend, or exposure of a business or market rather than the detail of each component.

FAQ

What does the Form 144 filing for CURI disclose about planned share sales?

The notice reports that former officer Hayden Phillip Brady intends to sell 80,931 shares of CuriosityStream common stock through Fidelity Brokerage Services LLC on or after September 3, 2026, with an aggregate market value of approximately $235,991.17 on NASDAQ.

How many CuriosityStream (CURI) shares has this insider sold recently?

The filing states that 30,400 shares of CuriosityStream common stock were sold on June 12, 2026 for total proceeds of $77,888.40 from the P. Brady Hayden Revocable Trust account associated with Hayden Phillip Brady.

What is the source of the CuriosityStream (CURI) shares covered by this Form 144?

The 80,931 shares to be sold come from restricted stock vesting events: 71,267 shares vested on November 11, 2025 and 9,664 shares vested on July 24, 2026, both received from the issuer as compensation.

Who is selling CuriosityStream (CURI) shares under this Rule 144 notice?

The person for whose account the securities are to be sold is Hayden Phillip Brady, identified as a former officer of CuriosityStream Inc. Sales are executed via Fidelity Brokerage Services LLC, with a related account in the P. Brady Hayden Revocable Trust.

On which market will the CuriosityStream (CURI) shares under this Form 144 be sold?

The filing indicates that the 80,931 shares of CuriosityStream common stock covered by the notice are expected to be sold on the NASDAQ market, with Fidelity Brokerage Services LLC listed as the broker handling the transactions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/03/2026 - 12:26 PM Accepted by SEC EDGAR 09/03/2026 - 12:25 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001938940
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	CuriosityStream Inc.
SEC File Number	001-39139
Address of Issuer	8484 GEORGIA AVE. SUITE 700 SILVER SPRING MARYLAND 20910
Phone	301-755-2050
Name of Person for Whose Account the Securities are To Be Sold	Hayden Phillip Brady
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Former Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	80931	235991.17	59338028	09/03/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	11/11/2025	Restricted Stock Vesting	Issuer			71267	11/11/2025	Compensation
Common	07/24/2026	Restricted Stock Vesting	Issuer			9664	07/24/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
P. Brady Hayden Revocable Trust 8484 Georgia Ave Suite 700 Silver Spring MD 20910	Common	06/12/2026	30400	77888.40

144: Remarks and Signature

Remarks	The sale today and the sale during the past 3 months occurred in the P. Brady Hayden Revocable Trust account of which Phillip B. Hayden is an account stakeholder.
Date of Notice	09/03/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Jared Cook, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Phillip B. Hayden
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)