Ouster, Inc. (OUST) director sells 5,000 shares under 10b5-1 plan

Rhea-AI Filing Summary

Ouster, Inc. director Stephen A. Skaggs sold 5,000 shares of Common Stock in an open-market transaction at $28.00 per share. After this sale, he directly holds 66,690 shares. The transaction was executed pursuant to a pre-arranged Rule 10b5-1 trading plan dated September 8, 2025.

Insider Trade Summary 10b5-1

Net Seller: 5,000 shares ($140,000)

Net Sell 1 txn

Insider SKAGGS STEPHEN A

Role null

Sold 5,000 shs ($140K)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,000	$28.00	$140K

Holdings After Transaction: Common Stock — 66,690 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 5,000 shares Sale price: $28.00 per share Shares held after: 66,690 shares

3 metrics

Shares sold 5,000 shares Open-market sale of Common Stock

Sale price $28.00 per share Price received for sold shares

Shares held after 66,690 shares Director’s direct holdings post-transaction

Key Terms

Rule 10b5-1 plan, open-market sale, Common Stock

3 terms

Rule 10b5-1 plan regulatory

"Reflects shares sold pursuant to a Rule 10b5-1 plan dated September 8, 2025."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

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.

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.

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^*

SKAGGS STEPHEN A

(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)
04/21/2026

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	04/21/2026		S		5,000(1)	D	$28	66,690	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 shares sold pursuant to a Rule 10b5-1 plan dated September 8, 2025.

	/s/ Megan Chung, as Attorney-in-Fact for Stephen A. Skaggs	04/22/2026
	** 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)

FAQ

What insider transaction did Ouster (OUST) report in this Form 4?

Ouster reported that director Stephen A. Skaggs sold 5,000 shares of Common Stock at $28.00 per share. This open-market sale was disclosed in a Form 4 insider trading report filed with regulators for transparency.

How many Ouster (OUST) shares does Stephen A. Skaggs hold after the sale?

Following the reported transaction, Stephen A. Skaggs directly holds 66,690 shares of Ouster Common Stock. This figure reflects his remaining position after selling 5,000 shares in the open market at $28.00 per share.

Was the Ouster (OUST) insider sale made under a Rule 10b5-1 plan?

Yes. The filing notes the 5,000-share sale was made under a Rule 10b5-1 trading plan dated September 8, 2025, indicating the transaction was pre-scheduled rather than timed discretionarily by the director.

What price did the Ouster (OUST) director receive for the sold shares?

The director’s 5,000 Ouster shares were sold at an average price of $28.00 per share. This reflects the per-share consideration received in the open-market or private transaction reported in the Form 4 filing.

What does an open-market sale by an Ouster (OUST) director mean for investors?

An open-market sale means the director sold shares through regular trading venues at market prices. Because this sale occurred under a Rule 10b5-1 plan, its timing was pre-arranged and may reflect routine portfolio or liquidity management.