Sean Mackay - 20 Aug 2026 Form 4 Insider Report for STANDARD BIOTOOLS INC. (LAB)

Reporting relationship: SVP & Chief Business Officer
Issuer ticker: LAB
Reported as of: 20 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 24 Aug 2026, 17:06:57 UTC
Prior SEC filing: 23 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Sean Mackay by Tomone Tanaka, Attorney-in-Fact

Key filing fact

Sean Mackay filed Form 4 for STANDARD BIOTOOLS INC. (LAB) on 24 Aug 2026.

Key facts

This page summarizes Sean Mackay's Form 4 filing for STANDARD BIOTOOLS INC. (LAB).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 24 Aug 2026, 17:06.

Change

Previous filing in this sequence was filed on 23 Jun 2026.
Current net transaction value: $0.

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 0001875501 Primary reporting owner

Mackay Sean

Relationship: SVP & Chief Business Officer
Address: C/O STANDARD BIOTOOLS INC., 50 MILK STREET, 10TH FLOOR, BOSTON
Signature: /s/ Sean Mackay by Tomone Tanaka, Attorney-in-Fact
Signature date: 24 Aug 2026

Reported non-derivative transactions

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

LAB transaction

Common Stock

Tax liability

Transaction value
Shares: -25,729
Change %: -1.7%
Price: $0.6720^*
Shares after: 1,480,823
Date: 20 Aug 2026
Ownership: Direct
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The shares were withheld from the reporting person to satisfy the tax withholding obligations that arose upon the vesting of restricted stock units ("RSUs") granted to the reporting person on May 20, 2024, March 21, 2025 and March 20, 2026, which grants were originally reported on Form 3 and Form 4s filed with the U.S. Securities and Exchange Commission on September 3, 2024, March 24, 2025 and April 8, 2026.