Form 4 for OUST Ouster, Inc.

Accepted 2026-08-28 18:43:31 ET · period of report 2026-08-26 · accession 0001193125-26-374910 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
D	2026-08-28 18:43	2026-08-26	OUST	Frichtl Mark	CTO	M - OptEx	$14.22	+100.0K	376.5K	+36%	+$1.42M
D	2026-08-28 18:43	2026-08-26	OUST	Frichtl Mark	CTO	M - OptEx	$0.00	-100.0K	100.7K	-50%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-08-26	M	A	100,000	$14.22	376,510	D	—	—	(F1) The shares received upon exercise remain subject to a lock-up period that expires at the close of business on August 31, 2026, pursuant to the lock-up agreement entered into for the Registrant's offering of common stock that closed on July 6, 2026.
2	Derivative	Incentive Stock Option	2026-08-26	M	D	100,000	$0.00	100,713	D	$14.22 · — to 2030-10-01	100,000 Common Stock	(F3) On the Reporting Person's Form 4 dated March 15, 2021 in which this option grant was reported, incentive stock options and non-qualified stock options were reported in the aggregate. All non-qualified stock options have since been exercised, with 100,713 incentive stock options remaining. (F2) The options are fully vested and exercisable. (F3) On the Reporting Person's Form 4 dated March 15, 2021 in which this option grant was reported, incentive stock options and non-qualified stock options were reported in the aggregate. All non-qualified stock options have since been exercised, with 100,713 incentive stock options remaining.