Ouster, Inc. (OUST) Insider Trading

Last 12 months

Insiders bought $178k and sold $47.4M on the open market.

97% of the selling was scheduled in advance under 10b5-1 plans. Director Susan Heystee sold $324k on May 21, 21% of their stake, outside a plan.

Net open-market

−$47.2M

2 buys · 44 sales

Under a 10b5-1 plan

97%

of the value sold

Insiders who bought / sold

1 / 9

executives and directors

Last open-market buy

May 2026

May 11, 2026

Get an email when OUST's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Sep 14	Megan Chung General Counsel and Secretary	Sold10b5-1 plan	11,484	$33.96	$390k	5.7%	Form 4
Sep 14	Darien Spencer Chief Operating Officer	Sold10b5-1 plan	12,808	$33.96	$435k	4.3%	Form 4
Sep 14	Charles Angus Pacala President and CEO	Sold10b5-1 plan	30,385	$33.96	$1.03M	2.8%	Form 4
Sep 14	Cyrille Jacquemet Chief Revenue Officer	SoldNo plan	8,896	$33.96	$302k	7.8%	Form 4
Sep 14	Kenneth P. Gianella Chief Financial Officer	Sold10b5-1 plan	15,686	$33.96	$533k	6.0%	Form 4
Sep 14	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan	18,778	$33.96	$638k	5.6%	Form 4
Aug 18	Kenneth P. Gianella Chief Financial Officer	Sold10b5-1 plan 4 parts	40,000	$45.33 average	$1.81M	13%	Form 4
Aug 5 – 6	Stephen A Skaggs Director	Sold10b5-1 plan 2 parts	5,000	$45.54 average	$228k	7.5%	Form 4
Aug 4	Darien Spencer Chief Operating Officer	Sold10b5-1 plan	30,000	$45.00	$1.35M	9.1%	Form 4
Jun 22	Ted L Tewksbury III Director	Sold10b5-1 plan	1,695	$47.00	$80k	1.3%	Form 4
Jun 12	Kenneth P. Gianella Chief Financial Officer	Sold10b5-1 plan	54,337	$38.82	$2.11M	15%	Form 4
Jun 12	Charles Angus Pacala President and CEO	Sold10b5-1 plan	29,797	$38.82	$1.16M	2.7%	Form 4
Jun 12	Cyrille Jacquemet Chief Revenue Officer	SoldNo plan	8,723	$38.82	$339k	7.1%	Form 4
Jun 12	Darien Spencer Chief Operating Officer	Sold10b5-1 plan	12,559	$38.82	$488k	3.7%	Form 4
Jun 12	Megan Chung General Counsel and Secretary	Sold10b5-1 plan	11,261	$38.82	$437k	5.3%	Form 4
Jun 12	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan	18,414	$38.82	$715k	6.2%	Form 4
May 26	Cyrille Jacquemet Chief Revenue Officer	Sold10b5-1 plan	9,433	$40.00	$377k	7.1%	Form 4
May 22 – 26	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan 9 parts	384,426	$40.60 average	$15.6M	57%	Form 4
May 26	Darien Spencer Chief Operating Officer	Sold10b5-1 plan	30,001	$45.00	$1.35M	8.1%	Form 4
May 21	Susan Heystee Director	SoldNo plan	9,316	$34.81	$324k	21%	Form 4
May 13 – 15	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan 8 parts	180,750	$33.18 average	$6M	22%	Form 4
May 14	Cyrille Jacquemet Chief Revenue Officer	Sold10b5-1 plan	10,000	$35.00	$350k	7.0%	Form 4
May 11	Virginia Boulet Director	Bought 2 parts	1,658	$25.23 average	$42k	0.7%	Form 4
May 5	Stephen A Skaggs Director	Sold10b5-1 plan	5,000	$30.00	$150k	7.5%	Form 4
May 4 – 5	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan 2 parts	34,600	$30.08 average	$1.04M	4.6%	Form 4
Apr 22	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan	400	$30.00	$12k	<0.1%	Form 4
Apr 21	Stephen A Skaggs Director	Sold10b5-1 plan	5,000	$28.00	$140k	7.0%	Form 4
Apr 20 – 21	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan 4 parts	120,000	$27.57 average	$3.31M	14%	Form 4
Apr 17	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan	30,000	$25.15	$755k	4.0%	Form 4
Apr 16	Megan Chung General Counsel and Secretary	Sold10b5-1 plan	5,837	$24.70	$144k	2.7%	Form 4
Apr 14 – 15	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan 2 parts	60,000	$23.17 average	$1.39M	7.8%	Form 4
Mar 25	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan	40,000	$20.94	$838k	5.9%	Form 4
Mar 19	Ted L Tewksbury III Director	Sold10b5-1 plan	1,695	$20.00	$34k	1.4%	Form 4
Mar 12	Darien Spencer Chief Operating Officer	Sold10b5-1 plan	10,938	$23.43	$256k	3.3%	Form 4
Mar 12	Mark Frichtl Chief Technology Officer	Sold10b5-1 plan	15,689	$23.43	$368k	2.4%	Form 4
Mar 12	Megan Chung General Counsel and Secretary	Sold10b5-1 plan	9,593	$23.43	$225k	5.2%	Form 4
Mar 12	Charles Angus Pacala President and CEO	Sold10b5-1 plan	24,657	$23.43	$578k	2.5%	Form 4
Mar 6	Virginia Boulet Director	Bought	6,500	$20.95	$136k	2.9%	Form 4
Jan 16	Megan Chung General Counsel and Secretary	Sold10b5-1 plan	5,837	$27.24	$159k	3.1%	Form 4
Dec 19, 2025	Ted L Tewksbury III Director	Sold10b5-1 plan	1,695	$21.47	$36k	1.4%	Form 4

Sep 1410b5-1 plan
Megan Chung
General Counsel and Secretary · sold 11,484 at $33.96
$390k
5.7% of stake
Sep 1410b5-1 plan
Darien Spencer
Chief Operating Officer · sold 12,808 at $33.96
$435k
4.3% of stake
Sep 1410b5-1 plan
Charles Angus Pacala
President and CEO · sold 30,385 at $33.96
$1.03M
2.8% of stake
Sep 14No plan
Cyrille Jacquemet
Chief Revenue Officer · sold 8,896 at $33.96
$302k
7.8% of stake
Sep 1410b5-1 plan
Kenneth P. Gianella
Chief Financial Officer · sold 15,686 at $33.96
$533k
6.0% of stake
Sep 1410b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 18,778 at $33.96
$638k
5.6% of stake
Aug 1810b5-1 plan
Kenneth P. Gianella
Chief Financial Officer · sold 40,000 at avg $45.33
$1.81M
13% of stake
Aug 5 – 610b5-1 plan
Stephen A Skaggs
Director · sold 5,000 at avg $45.54
$228k
7.5% of stake
Aug 410b5-1 plan
Darien Spencer
Chief Operating Officer · sold 30,000 at $45.00
$1.35M
9.1% of stake
Jun 2210b5-1 plan
Ted L Tewksbury III
Director · sold 1,695 at $47.00
$80k
1.3% of stake
Jun 1210b5-1 plan
Kenneth P. Gianella
Chief Financial Officer · sold 54,337 at $38.82
$2.11M
15% of stake
Jun 1210b5-1 plan
Charles Angus Pacala
President and CEO · sold 29,797 at $38.82
$1.16M
2.7% of stake
Jun 12No plan
Cyrille Jacquemet
Chief Revenue Officer · sold 8,723 at $38.82
$339k
7.1% of stake
Jun 1210b5-1 plan
Darien Spencer
Chief Operating Officer · sold 12,559 at $38.82
$488k
3.7% of stake
Jun 1210b5-1 plan
Megan Chung
General Counsel and Secretary · sold 11,261 at $38.82
$437k
5.3% of stake
Jun 1210b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 18,414 at $38.82
$715k
6.2% of stake
May 2610b5-1 plan
Cyrille Jacquemet
Chief Revenue Officer · sold 9,433 at $40.00
$377k
7.1% of stake
May 22 – 2610b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 384,426 at avg $40.60
$15.6M
57% of stake
May 2610b5-1 plan
Darien Spencer
Chief Operating Officer · sold 30,001 at $45.00
$1.35M
8.1% of stake
May 21No plan
Susan Heystee
Director · sold 9,316 at $34.81
$324k
21% of stake
May 13 – 1510b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 180,750 at avg $33.18
$6M
22% of stake
May 1410b5-1 plan
Cyrille Jacquemet
Chief Revenue Officer · sold 10,000 at $35.00
$350k
7.0% of stake
May 11
Virginia Boulet
Director · bought 1,658 at avg $25.23
$42k
0.7% of stake
May 510b5-1 plan
Stephen A Skaggs
Director · sold 5,000 at $30.00
$150k
7.5% of stake
May 4 – 510b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 34,600 at avg $30.08
$1.04M
4.6% of stake
Apr 2210b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 400 at $30.00
$12k
<0.1% of stake
Apr 2110b5-1 plan
Stephen A Skaggs
Director · sold 5,000 at $28.00
$140k
7.0% of stake
Apr 20 – 2110b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 120,000 at avg $27.57
$3.31M
14% of stake
Apr 1710b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 30,000 at $25.15
$755k
4.0% of stake
Apr 1610b5-1 plan
Megan Chung
General Counsel and Secretary · sold 5,837 at $24.70
$144k
2.7% of stake
Apr 14 – 1510b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 60,000 at avg $23.17
$1.39M
7.8% of stake
Mar 2510b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 40,000 at $20.94
$838k
5.9% of stake
Mar 1910b5-1 plan
Ted L Tewksbury III
Director · sold 1,695 at $20.00
$34k
1.4% of stake
Mar 1210b5-1 plan
Darien Spencer
Chief Operating Officer · sold 10,938 at $23.43
$256k
3.3% of stake
Mar 1210b5-1 plan
Mark Frichtl
Chief Technology Officer · sold 15,689 at $23.43
$368k
2.4% of stake
Mar 1210b5-1 plan
Megan Chung
General Counsel and Secretary · sold 9,593 at $23.43
$225k
5.2% of stake
Mar 1210b5-1 plan
Charles Angus Pacala
President and CEO · sold 24,657 at $23.43
$578k
2.5% of stake
Mar 6
Virginia Boulet
Director · bought 6,500 at $20.95
$136k
2.9% of stake
Jan 1610b5-1 plan
Megan Chung
General Counsel and Secretary · sold 5,837 at $27.24
$159k
3.1% of stake
Dec 19, 202510b5-1 plan
Ted L Tewksbury III
Director · sold 1,695 at $21.47
$36k
1.4% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch OUST, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in OUST's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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