CuriosityStream ex-officer may sell 25,000 shares

Former CuriosityStream officer linked entity Plan Z, LLC files to sell up to 25,000 CURI shares under Rule 144.

Rhea-AI Filing Summary

CuriosityStream Inc. (CURI) received a notice of proposed sale of restricted or control securities under Rule 144.

The notice states that up to 25,000 shares of CuriosityStream common stock may be sold through tastytrade, Inc., with an aggregate market value of $73,000.00 as of September 3, 2026. The sale is for the account of Plan Z, LLC, for which former officer Phillip B. (P. Brady) Hayden is managing member and an account stakeholder. The filing also lists prior open‑market purchases in 2024 and sales in June and September 2026 by the P. Brady Hayden Revocable Trust.

Key Figures

Shares proposed for sale: 25,000 shares Aggregate market value of proposed sale: $73,000.00 Broker: tastytrade, Inc. +5 more

8 metrics

Shares proposed for sale 25,000 shares Maximum CuriosityStream common shares to be sold under this Form 144

Aggregate market value of proposed sale $73,000.00 Market value of 25,000 CuriosityStream shares as of September 3, 2026

Broker tastytrade, Inc. Broker named for the 25,000-share proposed sale of CuriosityStream stock

Shares sold June 12, 2026 30,400 shares CuriosityStream common stock sold by P. Brady Hayden Revocable Trust for $77,888.40

Proceeds June 12, 2026 sale $77,888.40 Proceeds from sale of 30,400 CuriosityStream shares by the Revocable Trust

Shares sold September 3, 2026 80,931 shares CuriosityStream common stock sold by P. Brady Hayden Revocable Trust

Proceeds September 3, 2026 sale $25,953.67 Proceeds from sale of 80,931 CuriosityStream shares by the Revocable Trust

Date of notice September 3, 2026 Date the Form 144 notice regarding CuriosityStream shares was signed

Key Terms

Rule 144, Form 144, Open Market, Revocable Trust, +1 more

5 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.

Form 144 regulatory

"144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Open Market financial

"Purchase | Open Market | | | 5000"

An open market is a system where buying and selling of goods, services, or financial assets happen freely without restrictions or special controls. For investors, it means they can trade assets easily and quickly, which helps determine fair prices based on supply and demand. This environment encourages transparency and competition, making it easier to buy or sell with confidence.

Revocable Trust financial

"P. Brady Hayden Revocable Trust 8484 Georgia Ave"

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.

Common financial

"Common | tastytrade, Inc. 1330 W. Fulton St."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for CuriosityStream Inc. (CURI)?

It discloses a proposed sale under Rule 144 of up to 25,000 shares of CuriosityStream common stock, with an aggregate market value of $73,000.00, to be sold through tastytrade, Inc. for the account of Plan Z, LLC.

Who is the person associated with the proposed sale of CURI shares?

The notice is filed for the account of Plan Z, LLC, of which Phillip B. (P. Brady) Hayden, a former officer of CuriosityStream Inc., is the managing member and an account stakeholder.

How many CuriosityStream (CURI) shares are covered by this Form 144?

The filing covers a proposed sale of up to 25,000 shares of CuriosityStream common stock, with an indicated aggregate market value of $73,000.00 as of September 3, 2026.

What prior CuriosityStream (CURI) share sales are reported in the past three months?

The filing reports sales by the P. Brady Hayden Revocable Trust of 30,400 shares for $77,888.40 on June 12, 2026 and 80,931 shares for $25,953.67 on September 3, 2026.

What prior purchases of CuriosityStream (CURI) shares are listed in the Form 144?

The notice lists several open market purchases of CuriosityStream common stock in 2024, including transactions on May 13, May 15, May 17, May 24, May 30, May 31, June 3, and December 16, with share amounts ranging from 1,000 to 6,000 per trade.

When was the CuriosityStream (CURI) Form 144 notice filed?

The date of notice on the Form 144 is September 3, 2026.

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

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Available on EDGAR 09/03/2026 - 02:41 PM EDT Accepted by SEC EDGAR 09/03/2026 - 02:40 PM EDT 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	tastytrade, Inc. 1330 W. Fulton St. Suite 600 Chigaco IL 60607	25000	73000.00	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	05/15/2024	Purchase	Open Market			5000	05/15/2024	Cash
Common	05/17/2024	Purchase	Open Market			5000	05/17/2024	Cash
Common	05/24/2024	Purchase	Open Market			5000	05/24/2024	Cash
Common	05/30/2024	Purchase	Open Market			1000	05/30/2024	Cash
Common	05/13/2024	Purchase	Open Market			6000	05/31/2024	Cash
Common	06/03/2024	Purchase	Open Market			2000	06/03/2024	Cash
Common	12/16/2024	Purchase	Open Market			1000	12/16/2024	Cash

* 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
P. Brady Hayden Revocable Trust 8484 Georgia Ave Suite 700 Silver Spring MD 20910	Common	09/03/2026	80931	25953.67

144: Remarks and Signature

Remarks	This Notice of Proposed Sale of Securities for 25,000 common shares is on behalf of Plan Z, LLC, of which Phillip B. Hayden is managing member and 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	P. Brady Hayden
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)