Ouster (OUST) CTO receives 75,415 RSU grant, holdings rise to 712,297 shares

Rhea-AI Filing Summary

Frichtl Mark reported acquisition or exercise transactions in this Form 4 filing.

Ouster, Inc. Chief Technology Officer Mark Frichtl received a grant of 75,415 restricted stock units of common stock as equity compensation. The RSUs vest in 12 equal quarterly installments beginning on March 11, 2026, contingent on his continued service. Following this award, he holds 712,297 shares of common stock directly.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Frichtl Mark

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	75,415	$0.00	--

Holdings After Transaction: Common Stock — 712,297 shares (Direct)

Footnotes (1)

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Key Figures

RSUs granted: 75,415 units Transaction price per RSU: $0.0000 per unit Shares after transaction: 712,297 shares +2 more

5 metrics

RSUs granted 75,415 units Restricted stock units of common stock granted April 11, 2026

Transaction price per RSU $0.0000 per unit Equity compensation award, not open-market purchase

Shares after transaction 712,297 shares Common stock beneficially owned directly after the grant

Vesting schedule 1/12 quarterly Each quarter after March 11, 2026 vesting commencement date

Vesting commencement date March 11, 2026 Quarterly vesting anniversaries measured from this date

Key Terms

restricted stock units, RSUs, vesting commencement date, contingent right, +1 more

5 terms

restricted stock units financial

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

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

RSUs financial

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

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

vesting commencement date financial

"on each quarterly anniversary of March 11, 2026, the vesting commencement date"

The vesting commencement date is the starting point when an employee begins earning ownership rights to their promised benefits, such as stock options or retirement contributions. Think of it like the day a savings account is opened—only after this date do the benefits start to grow and become fully available over time. It matters to investors because it marks when the clock begins ticking toward full ownership, affecting the timing and value of these benefits.

contingent right financial

"Each RSU represents a contingent right to receive one share"

continued service financial

"subject to the reporting person's continued service through the applicable vesting date"

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^*

Frichtl Mark

(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)
	Chief Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/11/2026

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	04/11/2026		A		75,415(1)	A	$0	712,297	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 as to 1/12 of the total number of RSUs on each quarterly anniversary of March 11, 2026, the vesting commencement date, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

	/s/ Megan Chung, as Attorney-in-Fact for Mark Frichtl	04/14/2026
	** 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 Mark Frichtl?

Ouster reported that Chief Technology Officer Mark Frichtl received a grant of 75,415 restricted stock units of common stock. This is a compensation-related equity award, not an open-market purchase, and increases his direct holdings reported after the transaction.

How do the new RSUs for Ouster (OUST) CTO vest?

The 75,415 Ouster RSUs vest as to one-twelfth of the total grant on each quarterly anniversary of March 11, 2026. Vesting depends on Mark Frichtl’s continued service to the company through each applicable vesting date.

What does each Ouster (OUST) RSU granted to the CTO represent?

Each restricted stock unit granted to Ouster’s CTO represents a contingent right to receive one share of Ouster common stock. The RSUs have no expiration date and convert into shares as they vest over the scheduled quarterly installments.

How many Ouster (OUST) shares does Mark Frichtl hold after this Form 4 transaction?

After the reported RSU grant, Mark Frichtl is shown as beneficially owning 712,297 shares of Ouster common stock directly. This figure reflects his position following the April 11, 2026 acquisition reported on the Form 4.

Was there a purchase price for the Ouster (OUST) RSUs granted to the CTO?

The Form 4 shows a transaction price per share of $0.0000 for the 75,415 RSUs. This reflects that the award is part of equity compensation, rather than a cash-funded open-market purchase of Ouster common stock.