STOCK TITAN

Ouster (NYSE: OUST) CTO sells 60K shares under Rule 10b5-1 plan

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Ouster, Inc. Chief Technology Officer Mark Frichtl exercised stock options and sold shares in pre-planned transactions. On April 14–15, he exercised options for 60,000 shares of common stock at an exercise price of $2.13 per share and received common shares.

Over the same dates, he sold 60,000 common shares in open‑market trades at weighted average prices of $22.7562 and $24.00 per share, pursuant to a Rule 10b5-1 plan dated December 15, 2025 that includes sales for tax planning purposes. After these transactions, he directly holds 712,297 shares of Ouster common stock.

Positive

  • None.

Negative

  • None.
Insider Frichtl Mark
Role Chief Technology Officer
Sold 60,000 shs ($1.39M)
Type Security Shares Price Value
Exercise Non-Qualified Stock Option 20,000 $0.00 --
Exercise Common Stock 20,000 $2.13 $43K
Sale Common Stock 20,000 $24.00 $480K
Exercise Non-Qualified Stock Option 40,000 $0.00 --
Exercise Common Stock 40,000 $2.13 $85K
Sale Common Stock 40,000 $22.7562 $910K
Holdings After Transaction: Non-Qualified Stock Option — 216,434 shares (Direct); Common Stock — 732,297 shares (Direct)
Footnotes (1)
  1. Reflects shares sold pursuant to a Rule 10b5-1 plan dated December 15, 2025. Includes sales made for tax planning purposes. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.22 to $23.14. 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. The options are fully vested and exercisable.
Options exercised 60,000 shares Non-qualified stock options exercised at $2.13 per share on April 14–15, 2026
Exercise price $2.13/share Conversion or exercise price of non-qualified stock options
Shares sold 60,000 shares Common stock sold in open-market transactions on April 14–15, 2026
Sale price April 14 $22.7562 Weighted average sale price; trades between $22.22 and $23.14
Sale price April 15 $24.00 Per-share price for 20,000 common shares sold on April 15, 2026
Post-transaction holdings 712,297 shares Common stock directly owned after the reported transactions
Rule 10b5-1 plan date December 15, 2025 Date of trading plan governing reported sales and tax planning transactions
Option expiration October 1, 2030 Original expiration date of the non-qualified stock options before exercise
Non-Qualified Stock Option financial
"security_title: "Non-Qualified Stock Option" with underlying common stock"
A non-qualified stock option (NSO) is a contract that lets an employee or service provider buy company shares at a fixed price for a set period, like a voucher to purchase stock later at today’s price. It matters to investors because exercising NSOs creates ordinary income for the holder and can increase share count, affecting a company’s earnings and ownership mix; think of it as a future sale that can dilute existing shareholders and has immediate tax consequences for the recipient.
Rule 10b5-1 plan regulatory
"Reflects shares sold pursuant to a Rule 10b5-1 plan dated December 15, 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.
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.
fully vested and exercisable financial
"The options are fully vested and exercisable."
open-market sale financial
"transaction_action: "open-market sale" for common stock transactions"
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.
derivative security financial
"transaction_code_description: "Exercise or conversion of derivative security""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
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*
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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Technology Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/14/2026
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 Stock04/14/2026M40,000A$2.13752,297D
Common Stock04/14/2026S40,000(1)D$22.7562(2)712,297D
Common Stock04/15/2026M20,000A$2.13732,297D
Common Stock04/15/2026S20,000(1)D$24712,297D
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
Non-Qualified Stock Option$2.1304/14/2026M40,000 (3)10/01/2030Common Stock40,000$0.00236,434D
Non-Qualified Stock Option$2.1304/15/2026M20,000 (3)10/01/2030Common Stock20,000$0.00216,434D
Explanation of Responses:
1. Reflects shares sold pursuant to a Rule 10b5-1 plan dated December 15, 2025. Includes sales made for tax planning purposes.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.22 to $23.14. 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. The options are fully vested and exercisable.
/s/ Megan Chung, as Attorney-in-Fact for Mark Frichtl04/15/2026
** 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 did Ouster (OUST) CTO Mark Frichtl report in this Form 4?

Mark Frichtl reported exercising stock options and selling shares of Ouster common stock. He exercised options for 60,000 shares at $2.13 per share and sold 60,000 shares in open‑market transactions while remaining a significant direct shareholder.

How many Ouster (OUST) shares did the CTO sell and at what prices?

He sold 60,000 Ouster common shares over two days. Shares on April 14 sold at a weighted average price of $22.7562, and on April 15 at $24.00 per share, across multiple transactions within disclosed price ranges.

What options did the Ouster (OUST) CTO exercise in this filing?

He exercised non-qualified stock options covering 60,000 Ouster common shares at an exercise price of $2.13 per share. The options were fully vested and exercisable, with an original expiration date of October 1, 2030 before exercise.

Were the Ouster (OUST) CTO share sales pre-planned under Rule 10b5-1?

Yes. The filing states the sales were made under a Rule 10b5-1 trading plan dated December 15, 2025. It also notes that the transactions include sales made for tax planning purposes, indicating they were scheduled in advance.

How many Ouster (OUST) shares does the CTO hold after these transactions?

Following the reported exercises and sales, Mark Frichtl directly owns 712,297 shares of Ouster common stock. This post-transaction balance reflects his remaining equity stake after exercising options and selling 60,000 shares in the open market.

What is the significance of the weighted average price disclosure for Ouster (OUST)?

The weighted average price disclosure explains that shares were sold in multiple trades within a range of $22.22 to $23.14. The filer offers to provide full trade-by-trade detail to the company, investors, or regulators upon request for transparency.