[144] Ouster, Inc. SEC Filing

OUST affiliate files Form 144 reporting proposed and recent sales of Common Stock.

Rhea-AI Filing Summary

OUST affiliate files Form 144 reporting proposed and recent sales of Common Stock. The filing lists 20,000 shares to be sold on 04/15/2026 in connection with an Exercise of Stock Options and shows prior 10b5-1 sales by Mark Frichtl: 40,000 shares on 04/14/2026 for $910,248, 40,000 shares on 03/25/2026 for $837,576, and 15,689 shares on 03/12/2026 for $367,637.20.

Insights

Corporate Governance Analyst

Routine affiliate liquidation under Form 144 and 10b5-1 plans; no claim of misconduct.

Form 144 shows a scheduled sale of 20,000 shares tied to an Exercise of Stock Options on 04/15/2026. The filing also documents multiple recent 10b5-1 sales by Mark Frichtl, which are prearranged trading mechanisms commonly used for orderly dispositions.

These entries are procedural disclosures required by securities rules. Subsequent filings may report settlement and actual sale proceeds.

FAQ

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

What does OUST's Form 144 report about the 04/15/2026 transaction?

It reports a proposed sale of 20,000 shares of Common Stock tied to an Exercise of Stock Options scheduled for 04/15/2026. The filing lists the transaction method as Cash and the broker as Morgan Stanley Smith Barney LLC.

Who conducted prior sales disclosed in the Form 144 and how many shares were sold?

The filing shows prior 10b5-1 sales by Mark Frichtl: 40,000 shares on 04/14/2026, 40,000 shares on 03/25/2026, and 15,689 shares on 03/12/2026.

What proceeds are shown for the recent 10b5-1 sales in OUST's filing?

The Form 144 lists proceeds of $910,248 for 40,000 shares on 04/14/2026, $837,576 for 40,000 shares on 03/25/2026, and $367,637.20 for 15,689 shares on 03/12/2026.

Does this Form 144 indicate a Rule 10b5-1 plan was used for sales?

Yes. The filing explicitly labels the recent transactions as 10b5-1 Sales for Mark Frichtl, indicating those dispositions were executed under prearranged trading plans disclosed in the filing.

Which broker is named for the proposed sale in the Form 144?

The filing names Morgan Stanley Smith Barney LLC, 1 New York Plaza as the broker for the securities to be sold and lists the exchange as NASDAQ.

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

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Accepted by SEC EDGAR 04/15/2026 - 04:53 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	0001847596
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	Ouster, Inc.
SEC File Number	001-39463
Address of Issuer	350 Treat Avenue San Francisco CALIFORNIA 94110
Phone	4159490108
Name of Person for Whose Account the Securities are To Be Sold	MARK FRICHTL
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	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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	20000	468400.00	62803991	04/15/2026	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	04/15/2026	Exercise of Stock Options	Issuer			20000	04/15/2026	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
10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	04/14/2026	40000	910248.00
10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	03/25/2026	40000	837576.00
MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	03/12/2026	15689	367637.20

144: Remarks and Signature

Remarks
Date of Notice	04/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/15/2025
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/ Mark Frichtl
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)