Mark Frichtl - 22 May 2026 Form 4 Insider Report for Ouster, Inc. (OUST)

Reporting relationship: Chief Technology Officer
Issuer ticker: OUST
Reported as of: 22 May 2026
Net transaction value: -$15,606,971
SEC form: 4
Accepted by SEC: 27 May 2026, 17:14:58 UTC
Prior SEC filing: 15 May 2026
Next SEC filing: 16 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Megan Chung, as Attorney-in-Fact for Mark Frichtl

Key filing fact

Mark Frichtl filed Form 4 for Ouster, Inc. (OUST) on 27 May 2026.

Key facts

This page summarizes Mark Frichtl's Form 4 filing for Ouster, Inc. (OUST).
11 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 27 May 2026, 17:14.

Change

Previous filing in this sequence was filed on 15 May 2026.
Current net transaction value: -$15,606,971.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001847596 Primary reporting owner

Frichtl Mark

Relationship: Chief Technology Officer
Address: 350 TREAT AVENUE, SAN FRANCISCO
Signature: /s/ Megan Chung, as Attorney-in-Fact for Mark Frichtl
Signature date: 27 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OUST transaction

Common Stock

Options Exercise

Transaction value
Shares: +50,063
Change %: +8%
Price: $14.22^*
Shares after: 679,350
Date: 22 May 2026
Ownership: Direct
Footnotes: F1

OUST transaction

Common Stock

Sale

Transaction value: $1,298,434
Shares: -35,684
Change %: -5.3%
Price: $36.39
Shares after: 643,666
Date: 22 May 2026
Ownership: Direct
Footnotes: F2, F3

OUST transaction

Common Stock

Sale

Transaction value: $1,486,564
Shares: -40,000
Change %: -6.2%
Price: $37.16
Shares after: 603,666
Date: 22 May 2026
Ownership: Direct
Footnotes: F2, F4

OUST transaction

Common Stock

Sale

Transaction value: $770,228
Shares: -19,669
Change %: -3.3%
Price: $39.16
Shares after: 583,997
Date: 26 May 2026
Ownership: Direct
Footnotes: F2, F5

OUST transaction

Common Stock

Sale

Transaction value: $3,058,976
Shares: -76,582
Change %: -13%
Price: $39.94
Shares after: 507,415
Date: 26 May 2026
Ownership: Direct
Footnotes: F2, F6

OUST transaction

Common Stock

Sale

Transaction value: $2,885,815
Shares: -70,558
Change %: -14%
Price: $40.90
Shares after: 436,857
Date: 26 May 2026
Ownership: Direct
Footnotes: F2, F7

OUST transaction

Common Stock

Sale

Transaction value: $2,023,564
Shares: -48,191
Change %: -11%
Price: $41.99
Shares after: 388,666
Date: 26 May 2026
Ownership: Direct
Footnotes: F2, F8

OUST transaction

Common Stock

Sale

Transaction value: $1,935,000
Shares: -45,000
Change %: -12%
Price: $43.00
Shares after: 343,666
Date: 26 May 2026
Ownership: Direct
Footnotes: F2

OUST transaction

Common Stock

Sale

Transaction value: $1,980,000
Shares: -45,000
Change %: -13%
Price: $44.00
Shares after: 298,666
Date: 26 May 2026
Ownership: Direct
Footnotes: F2

OUST transaction

Common Stock

Sale

Transaction value: $168,390
Shares: -3,742
Change %: -1.3%
Price: $45.00
Shares after: 294,924
Date: 26 May 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

OUST transaction Derivative

Non-Qualified Stock Option

Options Exercise

Transaction value
Shares: -50,063
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 22 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 50,063
Exercise price: $14.22
Footnotes: F9

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 9 footnotes

Footnote F1

Includes 649 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.

Footnote F2

Reflects shares sold pursuant to a Rule 10b5-1 plan dated December 15, 2025.

Footnote F3

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.00 to $36.99. 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.

Footnote F4

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $37.00 to $37.50. 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.

Footnote F5

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.39 to $39.385. 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.

Footnote F6

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $39.39 to $40.38. 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.

Footnote F7

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.39 to $41.07. 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.

Footnote F8

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.50 to $42.06. 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.

Footnote F9

The options are fully vested and exercisable.