PACIFIC BIOSCIENCES OF CALIFORNIA, INC. (PACB) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-06-04

PACIFIC BIOSCIENCES OF CALIFORNIA, INC. (PACB) has filed 8 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-04. 3 Form 8-K material event filings were reported by PACB in the last 90 days. InsiderAlpha tracks every PACB SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About PACIFIC BIOSCIENCES OF CALIFORNIA, INC. (PACB)

SEC CIK	0001299130

90-Day SEC Filing Activity

Form 4 filings (90d)	8
Form 8-K filings (90d)	3
Latest Form 4 filing	2026-06-04

Recent PACB Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-04-08	Gibson Christopher	Director	A — Grant or award	57.5K	$0.00	—	SEC
2026-04-01	Gibson James R II	See Remarks	S — Open-market sale	88.2K	$1.37	$121K	SEC
2026-03-03	HENRY CHRISTIAN O	See Remarks	S — Open-market sale	12.5K	$1.51	$19K	SEC
2026-03-03	Gibson Christopher	Director	A — Grant or award	53.9K	$0.00	—	SEC
2026-03-03	Farmer Michele	See Remarks	S — Open-market sale	3.0K	$1.51	$5K	SEC
2026-03-03	Van Oene Mark	See Remarks	S — Open-market sale	6.5K	$1.51	$10K	SEC
2026-02-27	Farmer Michele	See Remarks	A — Grant or award	89.8K	$0.00	—	SEC
2026-02-27	Gibson James R II	See Remarks	A — Grant or award	333.8K	$0.00	—	SEC
2026-02-27	Van Oene Mark	See Remarks	A — Grant or award	500.0K	$0.00	—	SEC
2026-02-27	HENRY CHRISTIAN O	See Remarks	A — Grant or award	920.8K	$0.00	—	SEC
2026-02-18	Farmer Michele	See Remarks	S — Open-market sale	15.0K	$1.63	$24K	SEC
2026-02-18	Van Oene Mark	See Remarks	S — Open-market sale	55.1K	$1.63	$90K	SEC
2026-02-18	HENRY CHRISTIAN O	See Remarks	S — Open-market sale	140.9K	$1.63	$229K	SEC
2026-02-17	Van Oene Mark	See Remarks	S — Open-market sale	129.8K	$1.58	$205K	SEC
2026-02-17	HENRY CHRISTIAN O	See Remarks	S — Open-market sale	331.8K	$1.58	$523K	SEC

All transactions sourced from SEC EDGAR Form 4 filings for PACIFIC BIOSCIENCES OF CALIFORNIA, INC. (PACB). Updated in real time as new filings are submitted to the SEC.

Most-Active PACB Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
Gibson Christopher	1	—
MOHR MARSHALL	1	—
MILLIGAN JOHN F	1	—
Valantine Hannah	1	—
ORDONEZ KATHY	1	—

Recent PACB Form 8-K Material Events

2026-07-09 — Item 5.02 [SEC]
2026-06-04 — Item 5.02, 5.07, 9.01 [SEC]
2026-05-07 — Item 2.02, 9.01 [SEC]
2026-03-06 — Item 5.02, 7.01 · Leadership · neutral [SEC]
Chief Accounting Officer Michele Farmer resigned effective March 21, 2026, to pursue another opportunity. CFO Jim R. Gibson will assume the principal accounting officer role in addition to his CFO duties, with no compensation changes.
2026-03-05 — Item 5.02, 7.01, 9.01 · Leadership · neutral [SEC]
Pacific Biosciences appointed Christopher Gibson, Ph.D. as a Class I director effective March 3, 2026, increasing the board size to ten members. Dr. Gibson was also appointed to the Science and Technology Committee. This is a routine board expansion with no material business impl

Recent Insider Filings

2026-06-04 — MOHR MARSHALL (Director)
2026-06-04 — Gibson Christopher (Director)
2026-06-04 — Smith Christopher M (Director)
2026-06-04 — Valantine Hannah (Director)
2026-06-04 — LIVINGSTON RANDALL S (Director)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in PACB insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

PACB Insider Trading — FAQ

What is the latest insider trade for PACB?: PACIFIC BIOSCIENCES OF CALIFORNIA, INC. (PACB) had 8 insider filings in the last 90 days, with the most recent on 2026-06-04. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying PACB stock?: 0 insider purchases of PACB were filed in the last 90 days.
How many insiders are selling PACB stock?: 0 insider sales of PACB were filed in the last 90 days.
Where can I see PACB SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every PACB SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

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