STANDARD BIOTOOLS INC. — Director's Dealing 2024

Aug 22, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: STANDARD BIOTOOLS INC. (LAB)
CIK: 0001162194
Period of Report: 2024-08-19

Reporting Person: Casdin Partners Master Fund, L.P. (Director, 10% Owner)
Reporting Person: Casdin Eli (Director, 10% Owner)
Reporting Person: Casdin Capital, LLC (Director, 10% Owner)
Reporting Person: Casdin Partners GP, LLC (Director, 10% Owner)
Reporting Person: Casdin Private Growth Equity Fund II, L.P. (Director)
Reporting Person: Casdin Private Growth Equity Fund II GP, LLC (Director)
Reporting Person: Casdin Private Growth Equity Fund, L.P. (Director)
Reporting Person: Casdin Amplify Fund, LP (Director)
Reporting Person: CASDIN PRIVATE GROWTH EQUITY FUND GP, LLC (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-08-19	Common Stock	P	250000	$1.8529	Acquired	52025821	Indirect
2024-08-20	Common Stock	P	500000	$1.8734	Acquired	52525821	Indirect
2024-08-21	Common Stock	P	500000	$1.9039	Acquired	53025821	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	545000	Indirect
Common Stock	13939637	Indirect
Common Stock	2781432	Direct
Common Stock	2744219	Indirect

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $1.8279 to $1.8749. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares bought at each separate price within the range set forth in this footnote.

F2: 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 Capital, LLC ("Casdin"), the investment adviser to the Master Fund, (ii) Casdin Partners GP, LLC (the "GP"), the general partner of the Master Fund, and (iii) Eli Casdin, the managing member of Casdin and the GP.

F3: The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $1.8596 to $1.8828. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares bought at each separate price within the range set forth in this footnote.

F4: The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $1.8927 to $1.9364. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares bought at each separate price within the range set forth in this footnote.

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

F6: 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, the investment adviser to the Equity Fund II, and (ii) Eli Casdin, the managing member of Casdin.

F7: Includes Restricted Stock United ("RSUs"). Certain RSUs vest in full on the earlier to occur of June 28, 2025 and one day prior to the date of the Company's next annual meeting of stockholders, subject to the Reporting Person's continued service through the applicable vesting date and other RSUs vested as to 25% on July 23, 2024 and thereafter in two equal installments on the 15th day of the last month of each remaining fiscal quarter of 2024, subject to the Reporting Person's continued service through the applicable vesting date.

F8: The securities are owned directly by Eli Casdin.

F9: 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.