Ouster's Charles Pacala plans $1.23M stock sale

Form 144 reports Charles Angus Pacala’s planned Ouster stock sales linked to RSU vesting and tax withholding.

Rhea-AI Filing Summary

Ouster, Inc. (OUST) received a Rule 144 notice relating to planned sales of its common stock by Charles Angus Pacala. The notice covers 32,934 shares, tied to restricted stock units awarded under an incentive award plan, with the filer stating the shares are to be sold to cover withholding taxes upon vesting.

Key Figures

Shares to be sold under Rule 144: 32,934 shares Aggregate market value of shares to be sold: $1,234,695.66 Shares outstanding of the class: 72,112,333 shares +5 more

8 metrics

Shares to be sold under Rule 144 32,934 shares Common stock covered by the notice as of September 11, 2026

Aggregate market value of shares to be sold $1,234,695.66 Value associated with the 32,934 shares of common stock

Shares outstanding of the class 72,112,333 shares Common stock outstanding as referenced alongside the planned sale

RSU award 1 45,833 shares Restricted stock units awarded March 31, 2025 under incentive award plan

RSU award 2 11,531 shares Restricted stock units awarded April 12, 2026 under incentive award plan

Shares sold in past 3 months 29,797 shares Common stock sold on June 12, 2026

Proceeds from past 3-month sale $1,156,808.93 Total value of 29,797 shares of common stock sold June 12, 2026

Date of Notice September 11, 2026 Date of the Rule 144 notice filing

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 the Form 144 filing disclose for OUST (Ouster, Inc.)?

It discloses that Charles Angus Pacala plans to sell 32,934 shares of Ouster common stock under Rule 144, with the shares related to restricted stock units from an incentive award plan and intended to cover withholding taxes upon vesting.

How many Ouster (OUST) shares are covered by the planned Rule 144 sale?

The notice covers 32,934 shares of Ouster common stock, with an indicated aggregate market value of $1,234,695.66 and 72,112,333 shares of the class stated as outstanding as of the listed sale date.

What RSU-related OUST shares are referenced in the Form 144?

The filing lists two restricted stock unit awards: 45,833 shares dated March 31, 2025 and 11,531 shares dated April 12, 2026, both described as restricted stock units awarded under an incentive award plan for services rendered.

What prior Ouster (OUST) stock sales are reported in the last 3 months?

The filing reports that on June 12, 2026, 29,797 shares of Ouster common stock were sold for $1,156,808.93 in total during the past three months, in the section detailing recent sales.

What reason is given for the planned OUST share sales in this Form 144?

The remarks state that the shares are to be sold to cover withholding taxes upon vesting of restricted stock units, indicating the sales are associated with tax obligations arising from RSU vesting.

When is the planned Ouster (OUST) stock sale under Rule 144 dated?

The securities information section references a sale date of September 11, 2026 for the 32,934 shares of Ouster common stock to be sold through the named broker on NASDAQ.

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

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Available on EDGAR 09/11/2026 - 09:03 PM Accepted by SEC EDGAR 09/11/2026 - 09:02 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	0001848817
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	Pacala Charles Angus
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
Relationship to Issuer	Director

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	32934	1234695.66	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			45833	03/31/2025	Services rendered
Common Stock	09/11/2026	Restricted stock units awarded under incentive award plan	Issuer			11531	04/12/2026	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
Charles Angus Pacala 350 TREAT AVENUE SAN FRANCISCO CA 94110	Common Stock	06/12/2026	29797	1156808.93

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	06/09/2025
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, as Attorney-in-Fact for Charles Angus Pacala
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)