Ouster officer plans $467K stock sale for taxes

Ouster, Inc. (OUST) reports that officer Megan Chung has filed notice of a proposed sale under Rule 144 of up to 12,447 shares of common stock through E*TRADE, with sales expected on or after September 11, 2026.

Available on EDGAR 09/11/2026 - 09:21 PM EDT Accepted by SEC EDGAR 09/11/2026 - 09:20 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Ouster, Inc. (OUST) reports that officer Megan Chung has filed notice of a proposed sale under Rule 144 of up to 12,447 shares of common stock through E*TRADE, with sales expected on or after September 11, 2026. The shares relate to restricted stock units granted for services, and the filing states the sales are intended to cover withholding taxes upon vesting. Chung previously sold 11,261 shares of common stock on June 12, 2026.

Key Figures

Shares proposed for sale: 12,447 shares Proposed aggregate market value: $466,638.03 Shares sold in prior 3 months: 11,261 shares +2 more

5 metrics

Shares proposed for sale 12,447 shares Common stock under Rule 144, through E*TRADE, on or after September 11, 2026

Proposed aggregate market value $466,638.03 Aggregate market value of the 12,447 Ouster common shares covered by the notice

Shares sold in prior 3 months 11,261 shares Common stock sold on June 12, 2026 during the preceding three months

Aggregate value of prior sale $437,185.80 Value of 11,261 Ouster common shares sold on June 12, 2026

RSU grant sizes 4,500; 13,333; 3,844 units Restricted stock units granted on March 16, 2023; March 21, 2025; and April 11, 2026

Key Terms

Rule 144, restricted stock units, incentive award plan, withholding taxes

4 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.

restricted stock units financial

"Restricted stock units awarded under incentive award plan"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

incentive award plan financial

"Restricted stock units awarded under incentive award plan"

An incentive award plan is a formal program that rewards employees, executives, or directors with cash, stock, options, or other pay when the company meets set goals or performance targets. Like a sales commission or a loyalty program that pays out when you hit milestones, it’s designed to align staff behavior with company objectives; investors care because it affects a company’s costs, share count (dilution), leadership incentives, and long-term value creation.

withholding taxes financial

"Shares are to be sold to cover withholding taxes upon vesting"

Withholding taxes are amounts a payer or government takes out of payments — such as wages, interest, or dividends — before the recipient gets the money, functioning like a cashier keeping part of a bill to pay taxes on your behalf. For investors this matters because it reduces the cash they actually receive, affects net returns and yield calculations, and may require additional paperwork or treaty claims to recover or offset the withheld amount against final tax bills.

FAQ

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

What does OUST’s Form 144 filing by officer Megan Chung disclose?

It discloses that officer Megan Chung plans a potential Rule 144 sale of up to 12,447 shares of Ouster, Inc. common stock through E*TRADE on or after September 11, 2026, primarily to cover withholding taxes on vesting restricted stock units.

How many Ouster (OUST) shares are proposed to be sold under this Form 144?

The notice covers a proposed sale of up to 12,447 shares of Ouster, Inc. common stock, to be sold through E*TRADE Financial Corporation, with a proposed sale date of September 11, 2026.

What is the stated purpose of the planned OUST share sale by Megan Chung?

The filing states that the Ouster shares are to be sold to cover withholding taxes upon vesting of restricted stock units that were awarded under the company’s incentive award plan for services rendered.

What prior Ouster (OUST) stock sales by Megan Chung are disclosed?

The Form 144 reports that 11,261 shares of Ouster common stock were sold on June 12, 2026, for an aggregate value of $437,185.80 during the three months preceding the notice.

Which RSU grants are associated with the OUST shares in this Form 144?

The shares relate to restricted stock units awarded under an incentive plan on March 16, 2023 (4,500 RSUs), March 21, 2025 (13,333 RSUs), and April 11, 2026 (3,844 RSUs), all granted as compensation for services rendered.

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	0001966411
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) 9490108
Name of Person for Whose Account the Securities are To Be Sold	Chung Megan
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 Stock	ETRADE FINANCIAL CORPORATION 3 EDISON DRIVE ALPHARETTA GA 30005	12447	466638.03	72112333	09/11/2026	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 Stock	09/11/2026	Restricted stock units awarded under incentive award plan	Issuer			4500	03/16/2023	Services rendered
Common Stock	09/11/2026	Restricted stock units awarded under incentive award plan	Issuer			13333	03/21/2025	Services rendered
Common Stock	09/11/2026	Restricted stock units awarded under incentive award plan	Issuer			3844	04/11/2026	Services rendered

* 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
Megan Chung 350 TREAT AVENUE SAN FRANCISCO CA 94110	Common Stock	06/12/2026	11261	437185.80

144: Remarks and Signature

Remarks	Shares are to be sold to cover withholding taxes upon vesting of restricted stock units.
Date of Notice	09/11/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/20/2025
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/ Megan Chung
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)