Ouster director granted 4,725 restricted stock units

MADDOCK ERNEST E reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

MADDOCK ERNEST E reported acquisition or exercise transactions in this Form 4 filing.

Ouster, Inc. director Ernest E. Maddock received a grant of 4,725 shares of common stock on June 17, 2026, reported as a compensation-related award at no purchase price. Following this grant, his direct holdings increased to 88,902 shares of Ouster common stock.

The award represents restricted stock units, each giving a right to one share of common stock. These units vest in quarterly installments through the earlier of June 17, 2027 or Ouster’s next annual meeting of stockholders, as long as Maddock continues to serve the company.

Insider Trade Summary

Grant/Award: 4,725 shares

Grant/Award 1 txn

Insider MADDOCK ERNEST E

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	4,725	$0.00	$0.00

Holdings After Transaction: Common Stock — 88,902 shares (Direct)

Footnotes (1)

1. F1. Represents Ouster, Inc. (the "Company") restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Company's common stock. The RSUs vest in quarterly installments through the earlier of June 17, 2027 or the Company's next annual meeting of stockholders, subject to the Reporting Person's continued service through the applicable vesting date.

Key Figures

RSU grant size: 4,725 units Holdings after transaction: 88,902 shares Grant price per share: $0.00 per share +1 more

4 metrics

RSU grant size 4,725 units Restricted stock units granted on June 17, 2026

Holdings after transaction 88,902 shares Total Ouster common shares held directly after grant

Grant price per share $0.00 per share Compensation-related award, no purchase price paid

Vesting schedule end date June 17, 2027 RSUs vest quarterly through earlier of this date or next annual meeting

Key Terms

restricted stock units ("RSUs"), contingent right, vest in quarterly installments, annual meeting of stockholders

4 terms

restricted stock units ("RSUs") financial

"Represents Ouster, Inc. (the "Company") restricted stock units ("RSUs")."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

contingent right financial

"Each RSU represents a contingent right to receive one share of the Company's common stock."

vest in quarterly installments financial

"The RSUs vest in quarterly installments through the earlier of June 17, 2027 or the Company's next annual meeting"

annual meeting of stockholders financial

"through the earlier of June 17, 2027 or the Company's next annual meeting of stockholders"

FAQ

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

What did Ouster (OUST) director Ernest E. Maddock report in this Form 4?

Ernest E. Maddock reported receiving a grant of 4,725 restricted stock units in Ouster common stock. This is a compensation-related award at no purchase price, increasing his direct holdings to 88,902 shares after the transaction, according to the Form 4 disclosure.

How many Ouster (OUST) shares did Ernest E. Maddock hold after the grant?

After the grant, Ernest E. Maddock directly held 88,902 shares of Ouster common stock. This total includes the newly awarded 4,725 restricted stock units, each representing a contingent right to receive one share upon vesting under the award’s terms.

Is Ernest E. Maddock’s Ouster (OUST) transaction a market purchase or a compensation award?

The transaction is a compensation award, not a market purchase. The Form 4 shows transaction code "A" for a grant or award, with a price per share of $0.00, indicating restricted stock units granted as part of director compensation rather than open-market buying.

How do Ernest E. Maddock’s Ouster (OUST) RSUs from this grant vest?

The restricted stock units vest in quarterly installments. Vesting continues until the earlier of June 17, 2027 or Ouster’s next annual meeting of stockholders, and is conditioned on Maddock’s continued service with the company through each applicable vesting date.

What does each restricted stock unit (RSU) in the Ouster (OUST) grant represent?

Each restricted stock unit represents a contingent right to receive one share of Ouster’s common stock. The units convert into actual shares only as they vest over time, subject to Ernest E. Maddock continuing his service with the company through each vesting date.

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

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Accepted by SEC EDGAR 06/22/2026 - 05:35 PM EDT 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^*

MADDOCK ERNEST E

(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)
06/17/2026

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	06/17/2026		A		4,725(1)	A	$0.00	88,902	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. Represents Ouster, Inc. (the "Company") restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Company's common stock. The RSUs vest in quarterly installments through the earlier of June 17, 2027 or the Company's next annual meeting of stockholders, subject to the Reporting Person's continued service through the applicable vesting date.

	/s/ Megan Chung, as Attorney-in-Fact for Ernest E Maddock	06/22/2026
	** 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)