Form 144: Mark Frichtl to Resell 34,600 OUST Shares

Mark Frichtl reports a proposed sale of 34,600 shares of Common Stock by notice on 05/04/2026, tied to an exercise of stock options with cash settlement.

Rhea-AI Filing Summary

Mark Frichtl reports a proposed sale of 34,600 shares of Common Stock by notice on 05/04/2026, tied to an exercise of stock options with cash settlement. The filing also lists prior 10b5-1 sales during March–April 2026, including transactions of 60,000 shares on 04/21/2026 and 60,000 shares on 04/20/2026.

Insights

Securities Compliance Analyst

Form 144 notifies the market of an affiliate sale via option exercise and planned resale.

The filing records a proposed sale of 34,600 shares on 05/04/2026 following an exercise of stock options, and enumerates multiple executed 10b5-1 sales in March–April 2026. This is a disclosure step required under resale rules.

Timing and actual settlement depend on execution mechanics; subsequent Form 4/5 or broker reports would confirm completed sales.

Insider-Transaction Analyst

Recent pattern shows systematic 10b5-1 selling activity by the reporting person.

The excerpt lists several executed 10b5-1 sales: e.g., 60,000 shares on 04/21/2026 ($1,713,861.00) and 60,000 shares on 04/20/2026 ($1,594,806.00). These entries document past dispositions and the new notice signals an additional planned resale.

Further filings or trade reports would provide final execution details and resulting holdings.

Key Figures

Proposed resale: 34,600 shares 10b5-1 sale: 60,000 shares 10b5-1 sale: 60,000 shares +2 more

5 metrics

Proposed resale 34,600 shares planned sale on 05/04/2026 tied to option exercise

10b5-1 sale 60,000 shares executed on 04/21/2026 with $1,713,861.00 proceeds

10b5-1 sale 60,000 shares executed on 04/20/2026 with $1,594,806.00 proceeds

10b5-1 sale 15,689 shares executed on 03/12/2026 with $367,637.20 proceeds

Broker/Dealer Morgan Stanley Smith Barney LLC listed as executing broker on the filing

Key Terms

Form 144, 10b5-1, exercise of stock options, cash settlement

4 terms

Form 144 regulatory

"Filer Information | 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.

10b5-1 regulatory

"10b5-1 Sales for MARK FRICHTL 350 Treat Avenue"

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

"Securities To Be Sold | Exercise of Stock Options"

cash settlement financial

"05/04/2026 | Exercise of Stock Options | Cash"

Cash settlement is a process where, instead of exchanging physical assets like stocks or commodities, the parties involved settle the difference in value with money after a contract ends. For investors, it simplifies transactions by avoiding the need to handle or deliver the actual asset, making it quicker and more convenient to complete trades. This method ensures a straightforward way to settle agreements based on their final value.

FAQ

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

What does Mark Frichtl's Form 144 for OUST report?

It reports a proposed resale of 34,600 shares on 05/04/2026 following an exercise of stock options. The filing also lists prior 10b5-1 sales executed in March–April 2026.

Were there recent 10b5-1 sales by the reporting person?

Yes. The filing lists multiple 10b5-1 sales, including 60,000 shares on 04/21/2026 and 60,000 shares on 04/20/2026, with proceeds shown beside each trade.

Does the Form 144 confirm the sales have settled?

No. Form 144 provides notice of a proposed resale and lists past executed sales; it does not by itself confirm final settlement of the newly proposed 34,600-share sale.

What method is cited for the planned sale in the filing?

The planned sale is tied to an exercise of stock options and is listed with a cash settlement method on 05/04/2026 in the filing excerpt.

Will this Form 144 change OUST's outstanding share count?

This notice does not state a change to shares outstanding. It records a proposed resale of 34,600 shares; any change to outstanding shares would appear in separate company disclosures.

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

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Accepted by SEC EDGAR 05/04/2026 - 04:33 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	(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	34600	915170.00	62803991	05/04/2026	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	05/04/2026	Exercise of Stock Options	Issuer			34600	05/04/2026	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	04/22/2026	400	12000.00
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	The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
Date of Notice	05/04/2026
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)