Issuer (NASDAQ: OUST) affiliate files to sell 4,316 shares; prior 10b5-1 trades listed

Rhea-AI Filing Summary

Affiliate files notice to sell 4,316 shares. The filing lists 4,316 shares of Common stock to be sold on 05/15/2026 in connection with an exercise of stock options for cash. The filing also itemizes multiple prior 10b5-1 sales by Mark Frichtl between 03/12/2026 and 05/14/2026, including transactions of 136,434 and 60,000 shares on specific dates with proceeds shown.

Insights

Securities Counsel

Form 144 notice for proposed resale and recent 10b5-1 dispositions.

The filing lists 4,316 shares to be sold on 05/15/2026 via an exercise of stock options for cash. It separately documents a series of executed 10b5-1 sales by Mark Frichtl with per-trade proceeds recorded.

Timing and cash-flow treatment are stated for each line item; further disclosure of who will receive proceeds beyond the stated cash method is not included in the excerpt. Subsequent filings would show settlement and any Rule 144 compliance details.

Key Figures

Shares to be sold: 4,316 shares 10b5-1 sale example: 136,434 shares 10b5-1 sale example: 60,000 shares +2 more

5 metrics

Shares to be sold 4,316 shares to be sold on <date>05/15/2026</date> via exercise of stock options

10b5-1 sale example 136,434 shares sale executed on <date>05/13/2026</date> with proceeds shown

10b5-1 sale example 60,000 shares sales executed on <date>04/21/2026</date> and <date>04/20/2026</date>

Proceeds example <money>$4,442,371.08</money> proceeds reported for the <date>05/13/2026</date> sale row in the excerpt

Range of recorded trade dates 03/12/2026–05/14/2026 dates of listed 10b5-1 sales by Mark Frichtl

Key Terms

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

4 terms

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.

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.

exercise of stock options financial

"Securities To Be Sold | Common | 05/15/2026 | Exercise of Stock Options"

cash financial

"4316 | 05/15/2026 | Cash"

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	4316	150455.76	63672949	05/15/2026	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	05/15/2026	Exercise of Stock Options	Issuer			4316	05/15/2026	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	05/14/2026	40000	1400000.00
10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	05/13/2026	136434	4442371.08
10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	05/05/2026	13451	403530.00
10b5-1 Sales for MARK FRICHTL 350 Treat Avenue San Francisco CA 94110	Common	05/04/2026	21149	637160.15
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

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Form 144 for OUST disclose about shares to be sold?

The notice lists 4,316 shares of Common stock to be sold on 05/15/2026 via an exercise of stock options for cash. The filing records the method as cash and the sale date for that lot.

Who executed recent 10b5-1 sales shown in the filing for OUST?

The filing attributes multiple 10b5-1 sales to Mark Frichtl between 03/12/2026 and 05/14/2026, listing individual trade sizes and proceeds for each transaction recorded.

How large were individual 10b5-1 transactions in the past three months?

Examples include a 136,434-share sale on 05/13/2026 and 60,000-share sales on 04/21/2026 and 04/20/2026, with proceeds shown per trade in the excerpt.

Does the filing state who receives the proceeds from the sales?

The filing records the method for the 4,316-share lot as cash, but it does not specify recipient details or allocation of proceeds beyond that description in the provided excerpt.