Ouster director sells 9,316 shares in open trade

Ouster, Inc. director Susan Heystee reported an open-market sale of Common Stock.

Rhea-AI Filing Summary

Ouster, Inc. director Susan Heystee reported an open-market sale of Common Stock. She sold 9,316 shares on May 21, 2026 at an average price of $34.805 per share. After this transaction, she directly holds 35,093.7 shares of Ouster common stock.

Insights

Equity ownership analyst

Director executes a modest open-market sale while retaining a sizeable position.

Director Susan Heystee sold 9,316 shares of Ouster, Inc. Common Stock in an open-market transaction at $34.805 per share. The Form 4 shows this as a straightforward sale of non-derivative common shares.

Following the sale, Heystee directly holds 35,093.7 shares, indicating she retains a meaningful equity stake. With no derivative positions listed in this filing and no trading-plan footnotes provided in the excerpt, the event appears as a routine portfolio adjustment based solely on the available data.

Insider Trade Summary

Net Seller: 9,316 shares

Net Sell 1 txn

Insider Heystee Susan

Role Director

Sold 9,316 shs ($324K)

Type	Security	Shares	Price	Value
Sale	Common Stock	9,316	$34.805	$324K

Holdings After Transaction: Common Stock — 35,093.7 shares (Direct)

Key Figures

Shares sold: 9,316 shares Sale price: $34.805 per share Shares owned after: 35,093.7 shares +2 more

5 metrics

Shares sold 9,316 shares Open-market sale of Ouster Common Stock

Sale price $34.805 per share Average price for the reported sale

Shares owned after 35,093.7 shares Direct holdings following the transaction

Transaction date May 21, 2026 Date of the open-market sale

Transaction code S Sale in open market or private transaction

Key Terms

Common Stock, open-market sale, Form 4

3 terms

Common Stock financial

"security_title: "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.

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

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.

FAQ

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

What insider transaction did Ouster (OUST) director Susan Heystee report?

Ouster director Susan Heystee reported selling 9,316 shares of Common Stock. The trade was an open-market sale at an average price of $34.805 per share, according to the Form 4 transaction details.

What price did Susan Heystee receive for her Ouster (OUST) share sale?

Susan Heystee’s reported sale of Ouster Common Stock was executed at an average price of $34.805 per share. This price reflects the consideration received per share in the open-market transaction disclosed in the Form 4 filing.

How many Ouster (OUST) shares does Susan Heystee hold after the sale?

After the reported transaction, Susan Heystee directly holds 35,093.7 shares of Ouster Common Stock. This post-transaction balance is disclosed in the Form 4 as her total direct ownership following the 9,316-share sale.

Was the Ouster (OUST) insider transaction a buy or a sell?

The insider transaction was a sale. The Form 4 lists transaction code “S” and identifies the event as an open-market sale of 9,316 Ouster Common Stock shares by director Susan Heystee at $34.805 per share.

Did the Ouster (OUST) Form 4 include any derivative securities for Susan Heystee?

The Form 4 excerpt shows no derivative transactions for Susan Heystee. The derivativeSummary is empty, and the reported activity involves only non-derivative Ouster Common Stock sold in an open-market transaction.

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

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Accepted by SEC EDGAR 05/22/2026 - 06:04 PM Learn about SEC filing dates

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^*

Heystee Susan

(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)
05/21/2026

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	05/21/2026		S		9,316	D	$34.805	35,093.7	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 Mark Frichtl	05/22/2026
	** 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)