James R. Gibson II - 06 Oct 2026 Form 4 Insider Report for PACIFIC BIOSCIENCES OF CALIFORNIA, INC. (PACB)

Reporting relationship: Chief Financial Officer
Issuer ticker: PACB
Reported as of: 06 Oct 2026
Net transaction value: -$2,056,921
SEC form: 4
Accepted by SEC: 08 Oct 2026, 16:07:43 UTC
Prior SEC filing: 03 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Brett Atkins, Attorney-in-fact

Key filing fact

James R. Gibson II filed Form 4 for PACIFIC BIOSCIENCES OF CALIFORNIA, INC. (PACB) on 08 Oct 2026.

Key facts

This page summarizes James R. Gibson II's Form 4 filing for PACIFIC BIOSCIENCES OF CALIFORNIA, INC. (PACB).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 08 Oct 2026, 16:07.

Change

Previous filing in this sequence was filed on 03 Apr 2026.
Current net transaction value: -$2,056,921.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001384133 Primary reporting owner

Gibson James R II

Relationship: Chief Financial Officer
Address: PACIFIC BIOSCIENCES OF CALIFORNIA, INC., 1305 O'BRIEN DRIVE, MENLO PARK
Signature: /s/ Brett Atkins, Attorney-in-fact
Signature date: 08 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

PACB transaction

Common Stock

Options Exercise

Transaction value
Shares: +500,000
Change %: +40%
Price: $1.18^*
Shares after: 1,745,663
Date: 06 Oct 2026
Ownership: Direct

PACB transaction

Common Stock

Sale

Transaction value: $2,056,921
Shares: -661,815
Change %: -38%
Price: $3.11
Shares after: 1,083,848
Date: 06 Oct 2026
Ownership: Direct
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

PACB transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -500,000
Change %: -25%
Price: $0.000000^*
Shares after: 1,500,000
Date: 06 Oct 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 500,000
Exercise price: $1.18
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 22, 2026.

Footnote F2

This sale price represents the weighted average sale price of the shares sold ranging from $3.00 to $3.33 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

Footnote F3

1/4th of the shares subject to the option vested on the one year anniversary of the date of grant, and the balance of shares vest monthly thereafter over the next three years, provided that the Reporting Person continues to serve through each vesting date.

SEC remarks

Chief Financial Officer