Ouster holder plans $1.81M sale of 40,000 shares

Ouster, Inc. (symbol OUST) received a notice under Rule 144 that Kenneth Gianella intends to sell 40,000 shares of Ouster common stock, held as restricted stock, through Morgan Stanley Smith Barney LLC.

Rhea-AI Filing Summary

Ouster, Inc. (symbol OUST) received a notice under Rule 144 that Kenneth Gianella intends to sell 40,000 shares of Ouster common stock, held as restricted stock, through Morgan Stanley Smith Barney LLC. The shares have an indicated aggregate market value of $1,813,279.00. The notice also lists a prior sale by Gianella of 54,337 shares of common stock for $2,109,539.21 within the past three months.

Key Figures

Planned shares to be sold: 40,000 shares Aggregate market value of planned sale: $1,813,279.00 Shares outstanding: 72,112,333 shares +4 more

7 metrics

Planned shares to be sold 40,000 shares Common stock to be sold under Rule 144 for Kenneth Gianella

Aggregate market value of planned sale $1,813,279.00 Reported value for 40,000 Ouster common shares to be sold

Shares outstanding 72,112,333 shares Common shares figure listed alongside the planned Rule 144 sale

Shares sold in past 3 months 54,337 shares Common stock sold by Kenneth Gianella on 06/12/2026

Aggregate value of past 3-month sales $2,109,539.21 Value of 54,337 Ouster common shares sold on 06/12/2026

Proposed sale date 08/18/2026 Date associated with planned Rule 144 sale of 40,000 shares

Acquisition date of restricted stock 06/11/2026 Date listed for the restricted stock to be sold under Rule 144

Key Terms

Rule 144, Restricted Stock, aggregate market value

3 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 financial

"Common | 06/11/2026 | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC ... | 40000 | 1813279.00"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

What does the Form 144 filing for OUST disclose about Kenneth Gianella's planned sale?

The filing discloses that Kenneth Gianella plans to sell 40,000 shares of Ouster common stock under Rule 144. These are restricted shares with an indicated aggregate market value of $1,813,279.00, to be sold through Morgan Stanley Smith Barney LLC.

How many Ouster (OUST) shares has Kenneth Gianella sold in the past three months?

The notice states that Gianella has sold 54,337 shares of Ouster common stock in the past three months. Those shares were sold on 06/12/2026 for an aggregate value of $2,109,539.21, as reported in the Rule 144 disclosure.

What type of OUST securities is Kenneth Gianella selling under this Form 144?

Gianella is selling common stock of Ouster, described as restricted stock in the filing. These 40,000 restricted shares are to be sold for the account of Gianella under Rule 144, which governs resales of restricted and control securities.

Which broker is handling Kenneth Gianella's planned OUST share sale?

The planned sale of Ouster (OUST) shares is to be executed through Morgan Stanley Smith Barney LLC. The filing lists the brokerage’s Executive Financial Services office at 1 New York Plaza, 8th Floor, New York, NY 10004 as the intermediary for the transaction.

What aggregate market value is reported for Kenneth Gianella's planned OUST share sale?

For the planned sale of 40,000 Ouster shares, the filing reports an aggregate market value of $1,813,279.00. This figure reflects the market value used for the Rule 144 notice and is tied to the NASDAQ-listed common stock.

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

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Accepted by SEC EDGAR 08/18/2026 - 04:04 PM EDT 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	0001677143
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	KENNETH GIANELLA
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	40000	1813279.00	72112333	08/18/2026	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	06/11/2026	Restricted Stock	Issuer			40000	06/11/2026	Not Applicable

* 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
KENNETH GIANELLA 350 Treat Avenue San Francisco CA 94110	Common	06/12/2026	54337	2109539.21

144: Remarks and Signature

Remarks
Date of Notice	08/18/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/19/2026
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/ Kenneth P Gianella
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)