STANDARD BIOTOOLS INC. — Director's Dealing 2026

Mar 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: STANDARD BIOTOOLS INC. (LAB)
CIK: 0001162194
Period of Report: 2026-02-26

Reporting Person: Casdin Eli (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-26	Common Stock	A	52991	$1.17	Acquired	2954053	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	13939637	Indirect
Common Stock	2744219	Indirect
Common Stock	72100000	Indirect

Footnotes

F1: Represents Restricted Stock Units ("RSUs") that vest as to 25% on the last day of the last month of each fiscal quarter of 2026, subject to the Reporting Person's continued service through the applicable vesting date.

F2: The RSUs were issued to the Reporting Person, who elected to take RSUs in lieu of $62,000 in cash compensation for services as a board member.

F3: The securities are owned directly by Casdin Private Growth Equity Fund II, L.P. (the "Equity Fund II") and may be deemed to be indirectly beneficially owned by (i) Casdin Capital, LLC ("Casdin"), the investment adviser to the Equity Fund II, and (ii) Eli Casdin, the managing member of Casdin.

F4: The securities are owned directly by Casdin Private Growth Equity Fund, L.P. (the "Equity Fund") and may be deemed to be indirectly beneficially owned by (i) Casdin, the investment adviser to the Equity Fund, and (ii) Eli Casdin, the managing member of Casdin.

F5: The securities are owned directly by Casdin Partners Master Fund, L.P. (the "Master Fund") and may be deemed to be indirectly beneficially owned by (i) Casdin, the investment adviser to the Master Fund, (ii) Casdin Partners GP, LLC, the general partner of the Master Fund (the "GP"), and (iii) Eli Casdin, the managing member of Casdin and the GP.