Ouster (OUST) director Virginia Boulet adds 1,658 shares in May buys

Rhea-AI Filing Summary

Ouster, Inc. director Virginia Boulet reported buying additional common stock in open-market transactions. On May 11, 2026, she purchased a total of 1,658 shares of Ouster common stock in two trades at prices of $25.16 and $25.35 per share. Following these purchases, Boulet directly holds 230,000 shares of Ouster common stock.

Insider Trade Summary

Net Buyer: 1,658 shares ($41,831)

Net Buy 2 txns

Insider Boulet Virginia

Role null

Bought 1,658 shs ($42K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	608	$25.35	$15K
Purchase	Common Stock	1,050	$25.16	$26K

Holdings After Transaction: Common Stock — 228,950 shares (Direct, null)

Footnotes (1)

Key Figures

Total shares purchased: 1,658 shares First trade size: 1,050 shares First trade price: $25.16 per share +4 more

7 metrics

Total shares purchased 1,658 shares Open-market purchases on May 11, 2026

First trade size 1,050 shares Common Stock, open-market purchase at $25.16 per share

First trade price $25.16 per share Common Stock, open-market purchase on May 11, 2026

Second trade size 608 shares Common Stock, open-market purchase at $25.35 per share

Second trade price $25.35 per share Common Stock, open-market purchase on May 11, 2026

Shares owned after transactions 230,000 shares Direct ownership following May 11, 2026 purchases

Net buy direction 1,658 net-buy shares Form 4 transaction summary for May 11, 2026

Key Terms

open-market purchase, Common Stock, Form 4, transaction code P, +1 more

5 terms

open-market purchase financial

"transaction_action is described as an open-market purchase of Common Stock"

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

Common Stock financial

"security_title for both transactions is listed as Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 financial

"Insider transaction is reported on a Form 4 filing"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

transaction code P financial

"transaction_code P indicates a purchase in open market or private transaction"

net-buy financial

"transactionSummary shows a net-buy direction of 1,658 shares"

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Boulet Virginia

(Last) (First) (Middle)

350 TREAT AVENUE

(Street)

SAN FRANCISCO CALIFORNIA 94110

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Ouster, Inc. [ OUST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/11/2026		P		608	A	$25.35	228,950	D
Common Stock	05/11/2026		P		1,050	A	$25.16	230,000	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Megan Chung, as Attorney-in-Fact for Virginia Boulet	05/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Ouster (OUST) disclose for Virginia Boulet?

Ouster disclosed that director Virginia Boulet bought additional common stock in open-market trades. She acquired a total of 1,658 shares of Ouster common stock on May 11, 2026, according to the Form 4 filing.

How many Ouster (OUST) shares did director Virginia Boulet buy?

Director Virginia Boulet bought 1,658 shares of Ouster common stock. The purchases were split into two transactions of 1,050 shares and 608 shares, both executed on May 11, 2026 as open-market purchases.

At what prices did Virginia Boulet purchase Ouster (OUST) stock?

Virginia Boulet bought Ouster common stock at $25.16 and $25.35 per share. These prices reflect two separate open-market purchase transactions executed on May 11, 2026, as reported in the Form 4 insider filing.

How many Ouster (OUST) shares does Virginia Boulet own after the transactions?

After the reported purchases, Virginia Boulet directly owns 230,000 shares of Ouster common stock. This post-transaction holding figure comes from the Form 4 and reflects her direct ownership position following the May 11, 2026 trades.

Were Virginia Boulet’s Ouster (OUST) trades open-market purchases?

Yes. The Form 4 classifies both transactions as open-market purchases of Ouster common stock. They are coded as transaction type P, described as purchases in open-market or private transactions on May 11, 2026.