STOCK TITAN

Ouster (NYSE: OUST) CEO sells 29,797 shares in tax-cover transaction

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Ouster, Inc. President and CEO Charles Angus Pacala reported an open-market sale of 29,797 shares of common stock at a weighted average price of $38.823 per share. According to the footnotes, these shares were sold to cover withholding taxes due on recently vested restricted stock units under a Rule 10b5-1 “sale to cover” instruction.

After the transaction, Pacala directly holds 1,072,201 shares of Ouster common stock, which includes 2,962 shares acquired on May 15, 2026 through the company’s Amended and Restated 2022 Employee Stock Purchase Plan.

Positive

  • None.

Negative

  • None.
Insider Pacala Charles Angus
Role President and CEO
Sold 29,797 shs ($1.16M)
Type Security Shares Price Value
Sale Common Stock 29,797 $38.823 $1.16M
Holdings After Transaction: Common Stock — 1,072,201 shares (Direct, null)
Footnotes (1)
  1. Reflects shares sold to cover withholding taxes incurred upon the vesting and settlement of restricted stock units pursuant to a Rule 10b5-1 sale to cover instruction letter dated June 9, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.82 to $39.60. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Includes 2,962 shares of common stock acquired by the Reporting Person on May 15, 2026, pursuant to the Company's Amended and Restated 2022 Employee Stock Purchase Plan.
Shares sold 29,797 shares Open-market sale on June 12, 2026 to cover tax withholding
Weighted average sale price $38.823 per share Common stock sold in multiple transactions
Post-transaction holdings 1,072,201 shares Common stock directly owned after the sale
Trade price range $38.82–$39.60 per share Range of prices for the multiple sale transactions
ESPP acquisition 2,962 shares Shares acquired May 15, 2026 under 2022 Employee Stock Purchase Plan
Rule 10b5-1 regulatory
"pursuant to a Rule 10b5-1 sale to cover instruction letter dated June 9, 2025"
Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.
restricted stock units financial
"withholding taxes incurred upon the vesting and settlement of restricted stock units"
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.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Employee Stock Purchase Plan financial
"pursuant to the Company's Amended and Restated 2022 Employee Stock Purchase Plan."
An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.
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SEC Form 4
FORM 4UNITED 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*
Pacala Charles Angus

(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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
President and CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/12/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock06/12/2026S29,797(1)D$38.823(2)1,072,201(3)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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Reflects shares sold to cover withholding taxes incurred upon the vesting and settlement of restricted stock units pursuant to a Rule 10b5-1 sale to cover instruction letter dated June 9, 2025.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.82 to $39.60. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
3. Includes 2,962 shares of common stock acquired by the Reporting Person on May 15, 2026, pursuant to the Company's Amended and Restated 2022 Employee Stock Purchase Plan.
/s/ Megan Chung, as Attorney-in-Fact for Angus Pacala06/16/2026
** Signature of Reporting PersonDate
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 its CEO?

Ouster reported that President and CEO Charles Angus Pacala sold 29,797 shares of common stock at a weighted average price of $38.823 per share. The sale was executed in the open market and disclosed on a Form 4 insider trading report.

Why did Ouster CEO Charles Pacala sell 29,797 OUST shares?

The 29,797 shares were sold to cover withholding taxes triggered by the vesting and settlement of restricted stock units. The sale followed a Rule 10b5-1 “sale to cover” instruction letter, indicating a pre-arranged, tax-related transaction rather than a discretionary portfolio change.

What price did the Ouster CEO receive for the sold OUST shares?

The reported weighted average sale price was $38.823 per share. Footnotes state the shares were sold in multiple transactions at prices ranging from $38.82 to $39.60, with detailed trade breakdowns available upon request from the company or regulators.

How many Ouster (OUST) shares does the CEO still own after this sale?

After the sale, Charles Pacala directly owns 1,072,201 shares of Ouster common stock. This total includes 2,962 shares he acquired on May 15, 2026 under Ouster’s Amended and Restated 2022 Employee Stock Purchase Plan, in addition to previously held shares.

Was the Ouster CEO’s sale under a Rule 10b5-1 trading arrangement?

Yes. The footnotes explain the sale was executed under a Rule 10b5-1 “sale to cover” instruction letter dated June 9, 2025. Such arrangements pre-schedule trades, especially for covering tax obligations on equity awards, reducing the role of timing discretion by the insider.

Did the Ouster CEO recently acquire additional OUST shares through a company plan?

Yes. The filing notes that Pacala acquired 2,962 shares of Ouster common stock on May 15, 2026 through the company’s Amended and Restated 2022 Employee Stock Purchase Plan. These shares are included in his post-transaction direct ownership total of 1,072,201 shares.