Pacific Biosciences Of California PACB Insider Ownership

NASDAQ PACB

$1.96 +0.12 (+6.52%)

At close: Oct 20, 2026 · 4:00 PM EDT

Insider Holdings by Owner

11.11Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

3.05%

▼-0.131% pp QoQ

Shares Held by Insiders

9.48Mn

filed for Sep 2026

▼-4.12% QoQ

Shares Outstanding

310.81Mn

310,810,000 shares

Direct Holdings

9.48Mn

Indirect: 0

Net Shares Traded (QoQ)

-407.51K

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 10, 2026

Over the trailing 12 months, PACB insiders sold $3.37 million worth of shares (1.51Mn shares) in open-market trades, with no open-market purchases.

Pacific Biosciences of California's open-market sales in the past 12 months came from 4 insiders; no insider bought.
James R. Gibson II (Officer) sold the most Pacific Biosciences of California stock on the open market over the past 12 months, $2.18 million (750K shares), most recently on October 6, 2026.
Away from the open market, PACB insiders received 2.45Mn shares in stock awards and acquired 500K shares through option exercises and conversions over the last 12 months.
According to Business Quant data, insiders at Pacific Biosciences of California reported 8.62Mn shares in total in their latest Form 4 filings, down 1.92% from 8.79Mn shares at the end of Q3 2025.
PACB's insiders hold all 8.62Mn shares directly, in their own names, with no indirect holdings.
Per Business Quant, 13 insiders of PACB hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
Pacific Biosciences of California's top three insider holders by shares held are Christian O. Henry (Officer, 3.58Mn shares), Mark Van Oene (Officer, 2.71Mn shares) and James R. Gibson II (Officer, 1.08Mn shares).
Christian O. Henry holds 41.54% of the combined insider position in Pacific Biosciences of California.
Institutional holders reported 61.48% of Pacific Biosciences of California's outstanding shares for Q2 2026; insiders' latest Form 4 filings put their stake at about 2.77%, and other investors, including the public, hold the remaining 35.75%.
Over the past 12 months, 12 insiders reported transactions in Pacific Biosciences of California stock in 24 Form 4 filings.
Insider figures for PACB include Form 4 filings through October 8, 2026.

Form 4 Holdings

Insiders Holding PACB

Insiders 17

Shares held 11.11Mn

Of outstanding 3.57%

#	Insider	Position	Direct	Total	Share of Insiders	Last Filed
1	Christian O Henry	President Ceo	4,254,171	4,254,171	38.3%	04 Mar, 2026
2	Oene Mark Van	Chief Operating Officer	2,705,853	2,705,853	24.4%	18 Aug, 2026
3	James R Ii Gibson	Officer	1,083,848	1,083,848	9.8%	08 Oct, 2026
4	Jeff Eidel	Officer	869,730	869,730	7.8%	20 Aug, 2024
5	Susan G. Kim	Chief Financial Officer	695,654	695,654	6.3%	02 Oct, 2024
6	Kathy Ordonez	Chief Commercial Officer	403,037	403,037	3.6%	20 Jun, 2024
7	Michele Farmer	Chief Accounting Officer	305,948	305,948	2.8%	04 Mar, 2026
8	Peter Fromen	Chief Commercial Officer	190,280	190,280	1.7%	04 Mar, 2022
9	John F Milligan	Director	132,821	132,821	1.2%	20 Jun, 2024
10	Marshall Mohr	Director	132,821	132,821	1.2%	20 Jun, 2024
11	Christopher Gibson	Director	111,386	111,386	1.0%	10 Apr, 2026
12	David W Meline	Director	57,116	57,116	0.5%	20 Jun, 2024
13	Christopher M Smith	Director	54,099	54,099	0.5%	03 Feb, 2025
14	William W. Ericson	Director	41,616	41,616	0.4%	20 Jun, 2024
15	Hannah Valantine	Director	22,821	22,821	0.2%	20 Jun, 2024
16	Lucy Shapiro	Director	22,821	22,821	0.2%	20 Jun, 2024
17	Randall S Livingston	Director	22,821	22,821	0.2%	20 Jun, 2024

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

625 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
06 Oct, 2026	James R Ii Gibson	Officer	Acquired M	500,000	$1.18	$590.00K	1,745,663	Direct
06 Oct, 2026	James R Ii Gibson	Officer	Disposed S	661,815	$3.11	$2.06Mn	1,083,848	Direct
06 Oct, 2026	James R Ii Gibson	Officer	Disposed M	500,000	$0.00	$0	1,500,000	Direct
17 Aug, 2026	Oene Mark Van	Officer	Disposed S	26,911	$1.13	$30.41K	2,705,853	Direct
10 Aug, 2026	Oene Mark Van	Officer	Acquired A	489,130	$0.00	$0	2,732,764	Direct
10 Aug, 2026	Oene Mark Van	Officer	Acquired A	1,967,888	$0.00	$0	1,967,888	Direct
03 Jun, 2026	John F Milligan	Director	Acquired A	223,492	$0.00	$0	223,492	Direct
03 Jun, 2026	Christopher M Smith	Director	Acquired A	223,492	$0.00	$0	223,492	Direct
03 Jun, 2026	Kathy Ordonez	Director	Acquired A	223,492	$0.00	$0	223,492	Direct
03 Jun, 2026	Randall S Livingston	Director	Acquired A	223,492	$0.00	$0	223,492	Direct
03 Jun, 2026	Hannah Valantine	Director	Acquired A	223,492	$0.00	$0	223,492	Direct
03 Jun, 2026	Marshall Mohr	Director	Acquired A	223,492	$0.00	$0	223,492	Direct
03 Jun, 2026	Christopher Gibson	Director	Acquired A	74,497	$0.00	$0	74,497	Direct
03 Jun, 2026	William W. Ericson	Director	Acquired A	223,492	$0.00	$0	223,492	Direct
08 Apr, 2026	Christopher Gibson	Director	Acquired A	57,473	$0.00	$0	111,386	Direct
08 Apr, 2026	Christopher Gibson	Director	Acquired A	77,842	$0.00	$0	77,842	Direct
01 Apr, 2026	James R Ii Gibson	Officer	Disposed S	88,185	$1.37	$120.81K	1,245,663	Direct
03 Mar, 2026	Christopher Gibson	Director	Acquired A	53,913	$0.00	$0	53,913	Direct
03 Mar, 2026	Christopher Gibson	Director	Acquired A	73,087	$0.00	$0	73,087	Direct
03 Mar, 2026	Christian O Henry	Officer	Disposed S	12,497	$1.51	$18.92K	3,581,813	Direct

Showing 1 to 20 of 625 transactions