OUST Form 144: 400 shares listed; multiple 10b5-1 trades

OUST reported a notice under Form 144 covering proposed sales of common stock.

Accepted by SEC EDGAR 04/22/2026 - 04:22 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

OUST reported a notice under Form 144 covering proposed sales of common stock. The filing lists 400 shares related to the exercise of stock options and multiple prior 10b5-1 sales by Mark Frichtl totaling samples of 60,000, 60,000, and 30,000 shares on April 21, April 20, and April 17, 2026 respectively. The broker listed is Morgan Stanley Smith Barney LLC.

Key Figures

Shares listed to be sold: 400 shares 10b5-1 sale example: 60,000 shares 10b5-1 sale example: 60,000 shares +2 more

5 metrics

Shares listed to be sold 400 shares Exercise of Stock Options, 04/22/2026

10b5-1 sale example 60,000 shares Sale on 04/21/2026 by Mark Frichtl

10b5-1 sale example 60,000 shares Sale on 04/20/2026 by Mark Frichtl

10b5-1 sale example 30,000 shares Sale on 04/17/2026 by Mark Frichtl

Proceeds shown (example) $1,713,861.00 Proceeds line associated with a 60,000-share entry (04/21/2026)

Key Terms

Form 144, 10b5-1, Exercise of Stock Options

3 terms

Form 144 regulatory

"144: Filer Information 144: Issuer Information 144: Securities 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.

10b5-1 regulatory

"10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Exercise of Stock Options financial

"Common | 04/22/2026 | Exercise of Stock Options"

FAQ

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

What does the OUST Form 144 disclose?

The Form 144 notifies of proposed sales of common stock; it shows 400 shares tied to an option exercise and lists recent 10b5-1 sales by Mark Frichtl, including multiple trades on April 2026. The broker named is Morgan Stanley Smith Barney LLC.

How many shares were listed from recent 10b5-1 sales in the filing?

The filing records several 10b5-1 sales by Mark Frichtl including 60,000 on 04/21/2026, 60,000 on 04/20/2026, and 30,000 on 04/17/2026. Other dated trades are also listed in the excerpt.

Who is the selling party named in the OUST Form 144?

The selling party identified is Mark Frichtl of San Francisco, with multiple 10b5-1 sales listed. The broker handling the transaction is Morgan Stanley Smith Barney LLC located at 1 New York Plaza, 8th Floor.

Does the Form 144 show the sale method or consideration?

The excerpt lists an Exercise of Stock Options for 400 shares and indicates Cash as consideration. Other entries record completed 10b5-1 sales with gross proceeds figures for individual dates.

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

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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	(415)949-0108
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	400	11044.00	62803991	04/22/2026	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	04/22/2026	Exercise of Stock Options	Issuer			400	04/22/2026	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	04/21/2026	60000	1713861.00
10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	04/20/2026	60000	1594806.00
10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	04/17/2026	30000	754395.00
10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	04/15/2026	20000	480000.00
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	04/22/2026
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)