Ouster (OUST) legal chief sells 5,837 shares mainly for tax planning

Rhea-AI Filing Summary

Ouster, Inc. General Counsel and Secretary Megan Chung completed an open-market sale of 5,837 shares of common stock at $24.70 per share on April 16, 2026. A footnote states the sale was made primarily for tax planning purposes.

Following this transaction, Chung continues to hold 213,836 shares of Ouster common stock directly, indicating she retained the vast majority of her position.

Insider Trade Summary 10b5-1

Net Seller: 5,837 shares ($144,174)

Net Sell 1 txn

Insider Chung Megan

Role General Counsel and Secretary

Sold 5,837 shs ($144K)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,837	$24.70	$144K

Holdings After Transaction: Common Stock — 213,836 shares (Direct)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 5,837 shares Sale price: $24.70 per share Shares held after sale: 213,836 shares

3 metrics

Shares sold 5,837 shares Open-market sale on April 16, 2026

Sale price $24.70 per share Price for common stock sold

Shares held after sale 213,836 shares Direct ownership following transaction

Key Terms

open-market sale, tax planning purposes, General Counsel and Secretary

3 terms

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.

tax planning purposes financial

"Reflects sale transactions made primarily for tax planning purposes."

General Counsel and Secretary financial

"officer_title: "General Counsel and Secretary""

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).

X

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^*

Chung Megan

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel and Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/16/2026

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	04/16/2026		S		5,837(1)	D	$24.7	213,836	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:

1. Reflects sale transactions made primarily for tax planning purposes.

Remarks:

All sale transactions reported herein were made pursuant to a Rule 10b5-1 trading plan dated June 4, 2025.

	/s/ Megan Chung	04/17/2026
	** 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) report for Megan Chung?

Ouster reported that General Counsel and Secretary Megan Chung executed an open-market sale of 5,837 shares of common stock. The transaction occurred on April 16, 2026, and was described in a footnote as being primarily for tax planning purposes.

How many Ouster (OUST) shares did Megan Chung sell and at what price?

Megan Chung sold 5,837 shares of Ouster common stock at a price of $24.70 per share. This was an open-market sale reported in a Form 4 insider filing covering the transaction dated April 16, 2026.

How many Ouster (OUST) shares does Megan Chung hold after the sale?

After the reported sale, Megan Chung directly holds 213,836 shares of Ouster common stock. This indicates that the transaction involved only a small fraction of her overall position, with the bulk of her ownership remaining intact.

What was the stated purpose of Megan Chung’s Ouster (OUST) stock sale?

A footnote explains that Megan Chung’s sale of 5,837 Ouster shares was conducted primarily for tax planning purposes. This suggests the transaction was more about managing personal tax obligations than signaling a change in her view of the company.

Was the Ouster (OUST) insider trade by Megan Chung an open-market sale?

Yes. The Form 4 characterizes Megan Chung’s transaction as an open-market sale of common stock. The filing uses transaction code “S,” which denotes a sale in the open market or a private transaction under SEC reporting conventions.