Ouster OUST Insider Ownership

NASDAQ OUST

$27.97 -2.34 (-7.72%)

As of: Oct 22, 2026 · 3:59 PM EDT

Insider Holdings by Owner

6.82Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

4.75%

▼-0.242% pp QoQ

Shares Held by Insiders

3.13Mn

filed for Sep 2026

▼-4.85% QoQ

Shares Outstanding

65.99Mn

65,990,437 shares

Direct Holdings

3.13Mn

Indirect: 0

Net Shares Traded (QoQ)

-159.63K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 21, 2026

Across the past 12 months, open-market trades by Ouster insiders totaled $178,006 in purchases (8.16K shares) and $47.36 million in sales (1.38Mn shares).

By number of insiders, Ouster saw one insider buy and 9 insiders sell on the open market over the past 12 months.
Among OUST insiders, Virginia Boulet (Director) bought the most stock on the open market in the past 12 months: $178,006 (8.16K shares), most recently on May 11, 2026.
Meanwhile, the largest open-market sales of OUST in the past 12 months were by Mark Frichtl (Chief Technology Officer), totaling $31.06 million (918.72K shares), most recently on September 14, 2026.
The latest open-market trade in OUST stock by an insider was a sale of 30.39K shares for $1.03 million by Charles Angus Pacala (President and CEO) on September 14, 2026.
In transactions other than open-market trades, Ouster insiders received 339.87K shares in stock awards, acquired 532.15K shares through option exercises and conversions and gave away 40.83K shares as gifts over the past 12 months.
Business Quant data puts insider holdings in OUST at 3.07Mn shares across insiders' latest Form 4 filings, down 6.65% from 3.29Mn shares at the end of Q2 2026 and down 12.67% from 3.52Mn shares at the end of Q3 2025.
None of the 3.07Mn shares held by Ouster insiders is held through trusts, partnerships or family members; all are direct holdings.
Business Quant counts 15 insiders with holdings in Ouster stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
Ouster's three biggest insider holders are Charles Angus Pacala (President and CEO, 1.04Mn shares), Mark Frichtl (Chief Technology Officer, 318.99K shares) and Darien Spencer (Chief Operating Officer, 287K shares), based on their latest Form 4 filings.
Of the shares held by OUST insiders, 33.90% belong to Charles Angus Pacala.
Institutions accounted for 53.89% of OUST's outstanding shares in Q2 2026, insiders about 4.66% per their latest Form 4 filings, and other investors, including the public, about 41.45%.
Over the trailing 12 months, 13 insiders reported transactions in OUST stock across 64 Form 4 filings.
These insider figures for Ouster are based on Form 4 filings through October 7, 2026.

Form 4 Holdings

Insiders Holding OUST

Insiders 26

Shares held 6.82Mn

Of outstanding 10.34%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Krishna Kantheti	TenPercentOwner	0	2,443,226	2,443,226	35.8%	17 Aug, 2023
2	Charles Angus Pacala	President And Ceo	1,604,197	0	1,604,197	23.5%	16 Sep, 2026
3	Mark Frichtl	Chief Technology Officer	318,987	0	318,987	4.7%	16 Sep, 2026
4	Darien Spencer	Chief Operating Officer	286,999	0	286,999	4.2%	16 Sep, 2026
5	Kenneth P. Gianella	Chief Financial Officer	245,328	0	245,328	3.6%	16 Sep, 2026
6	Anna Brunelle	Chief Financial Officer	232,062	0	232,062	3.4%	20 Dec, 2022
7	Virginia Boulet	Director	230,000	0	230,000	3.4%	12 May, 2026
8	Megan Chung	General Counsel And Secretary	189,291	0	189,291	2.8%	16 Sep, 2026
9	Mark Weinswig	Chief Financial Officer	173,960	0	173,960	2.6%	16 Dec, 2024
10	Remy W Trafelet	Director	166,145	0	166,145	2.4%	09 Jan, 2023
11	Ted L Iii Tewksbury	Director	124,999	0	124,999	1.8%	22 Jun, 2026
12	Cyrille Jacquemet	Chief Revenue Officer	105,539	0	105,539	1.5%	16 Sep, 2026
13	Nathan Dickerman	President Of Field Operations	104,069	0	104,069	1.5%	17 Aug, 2023
14	Ernest E Maddock	Director	88,902	0	88,902	1.3%	22 Jun, 2026
15	Christina Correia	Director	76,415	0	76,415	1.1%	22 Jun, 2026
16	Adam Dolinko	Officer	71,485	0	71,485	1.0%	14 Dec, 2022
17	Chen Geng	Interim Cfo	68,090	0	68,090	1.0%	25 Mar, 2025
18	Stephen A Skaggs	Director	61,415	0	61,415	0.9%	07 Aug, 2026
19	Karin Radstrom	Director	60,148	0	60,148	0.9%	09 Oct, 2024
20	Kristin Slanina	Director	46,421	0	46,421	0.7%	09 Jul, 2024
21	Susan Heystee	Interim Chief Revenue Officer	41,258	0	41,258	0.6%	07 Oct, 2026
22	Phillip Eyler	Director	20,383	0	20,383	0.3%	22 Jun, 2026
23	Riaz Valani	Director	18,625	0	18,625	0.3%	14 Feb, 2023
24	Emmanuel T Hernandez	Director	15,355	0	15,355	0.2%	09 Jan, 2023
25	Sundari Mitra	Director	13,931	0	13,931	0.2%	09 Jan, 2023
26	Calvo Jorge A Del	Director	13,395	0	13,395	0.2%	07 Oct, 2022

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

398 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
05 Oct, 2026	Susan Heystee	Director	Acquired A	779	$44.12	$34.37K	41,258	Direct
14 Sep, 2026	Mark Frichtl	Chief Technology Officer	Disposed S	18,778	$33.96	$637.69K	318,987	Direct
14 Sep, 2026	Darien Spencer	Chief Operating Officer	Disposed S	12,808	$33.96	$434.95K	286,999	Direct
14 Sep, 2026	Megan Chung	General Counsel And Secretary	Disposed S	11,484	$33.96	$389.99K	189,291	Direct
14 Sep, 2026	Kenneth P. Gianella	Chief Financial Officer	Disposed S	15,686	$33.96	$532.68K	245,328	Direct
14 Sep, 2026	Charles Angus Pacala	President And Ceo	Disposed S	30,385	$33.96	$1.03Mn	1,041,816	Direct
14 Sep, 2026	Cyrille Jacquemet	Chief Revenue Officer	Disposed S	8,896	$33.96	$302.09K	105,539	Direct
09 Sep, 2026	Megan Chung	General Counsel And Secretary	Disposed G	2,084	$0.00	$0	200,775	Direct
02 Sep, 2026	Mark Frichtl	Chief Technology Officer	Disposed G	38,745	$0.00	$0	337,765	Direct
26 Aug, 2026	Mark Frichtl	Chief Technology Officer	Acquired M	100,000	$14.22	$1.42Mn	376,510	Direct
26 Aug, 2026	Mark Frichtl	Chief Technology Officer	Disposed M	100,000	$0.00	$0	100,713	Direct
18 Aug, 2026	Kenneth P. Gianella	Chief Financial Officer	Disposed S	17,927	$44.65	$800.42K	283,087	Direct
18 Aug, 2026	Kenneth P. Gianella	Chief Financial Officer	Disposed S	13,364	$45.52	$608.39K	269,723	Direct
18 Aug, 2026	Kenneth P. Gianella	Chief Financial Officer	Disposed S	8,201	$46.40	$380.56K	261,522	Direct
18 Aug, 2026	Kenneth P. Gianella	Chief Financial Officer	Disposed S	508	$47.09	$23.92K	261,014	Direct
05 Aug, 2026	Stephen A Skaggs	Director	Disposed S	1,386	$46.48	$64.42K	65,029	Direct
06 Aug, 2026	Stephen A Skaggs	Director	Disposed S	3,614	$45.18	$163.28K	61,415	Direct
04 Aug, 2026	Darien Spencer	Chief Operating Officer	Disposed S	30,000	$45.00	$1.35Mn	299,807	Direct
06 Jul, 2026	Susan Heystee	Director	Acquired A	660	$49.83	$32.89K	40,479	Direct
17 Jun, 2026	Stephen A Skaggs	Director	Acquired A	4,725	$0.00	$0	66,415	Direct

Showing 1 to 20 of 398 transactions