Senior insider sale

Chief Technology Officer at OUSTER, INC. — senior position signals high conviction

$17.77M

597.12K shares

What this filing means

FRICHTL MARK plans to sell 597.12K shares of OUSTER, INC. valued at approximately $17.77M. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.

FRICHTL MARK

Filed: 5/22/2026ACC: 0001950047-26-004987

InsiderFRICHTL MARKCIK 1847596

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IssuerOUSTER, INC.CIK 1816581

Officer· Chief Technology Officer

Since Mar 2021

597.12K

Shares to sell

$17.77M

Approx. market value

115.68K

Acquired (3 months)

Planned

13 completed

Securities Acquired — Last 3 Months2

Sort

Exercise of Stock Options

Cash

5/22/2026

50.06K

Founders Shares

N/A

9/3/2015

65.62K

Total acquired115.68K

Acquisition Date	Type	Amount Acquired	Gift
5/22/2026	Exercise of Stock Options Cash	50.06K	—
9/3/2015	Founders Shares N/A	65.62K	—
Total		115.68K

Planned & Completed Dispositions14

Sort

Completed

—Completed

Units to sell

4.32K

Market value

$155.4K

5/15/2026

—Completed

Units to sell

40K

Market value

$1.40M

5/14/2026

—Completed

Units to sell

136.43K

Market value

$4.44M

5/13/2026

—Completed

Units to sell

13.45K

Market value

$403.5K

5/5/2026

—Completed

Units to sell

21.15K

Market value

$637.2K

5/4/2026

—Completed

Units to sell

400.00

Market value

$12.0K

4/22/2026

—Completed

Units to sell

60K

Market value

$1.71M

4/21/2026

—Completed

Units to sell

60K

Market value

$1.59M

4/20/2026

—Completed

Units to sell

30K

Market value

$754.4K

4/17/2026

—Completed

Units to sell

20K

Market value

$480.0K

4/15/2026

—Completed

Units to sell

40K

Market value

$910.2K

4/14/2026

—Completed

Units to sell

40K

Market value

$837.6K

3/25/2026

—Completed

Units to sell

15.69K

Market value

$367.6K

3/12/2026

Planned — Approximate Date

NASDAQPlanned

Units to sell

115.68K

Market value

$4.06M

5/22/2026

Total

Units

597.12K

Value

$17.77M

Date	Units to Sell	Approx. Market Value	Exchange	Status
Completed
5/15/2026	4.32K	$155.4K	—	Completed
5/14/2026	40K	$1.40M	—	Completed
5/13/2026	136.43K	$4.44M	—	Completed
5/5/2026	13.45K	$403.5K	—	Completed
5/4/2026	21.15K	$637.2K	—	Completed
4/22/2026	400.00	$12.0K	—	Completed
4/21/2026	60K	$1.71M	—	Completed
4/20/2026	60K	$1.59M	—	Completed
4/17/2026	30K	$754.4K	—	Completed
4/15/2026	20K	$480.0K	—	Completed
4/14/2026	40K	$910.2K	—	Completed
3/25/2026	40K	$837.6K	—	Completed
3/12/2026	15.69K	$367.6K	—	Completed
Planned — Approximate Date
5/22/2026	115.68K	$4.06M	NASDAQ	Planned
Total	597.12K	$17.77M