STANDARD BIOTOOLS INC. — Director's Dealing 2024

Aug 14, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: STANDARD BIOTOOLS INC. (LAB)
CIK: 0001162194
Period of Report: 2024-08-09

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
2024-08-09	Common Stock	P	525408	$1.6149	Acquired	49525821	Indirect
2024-08-12	Common Stock	P	500000	$1.6412	Acquired	50025821	Indirect
2024-08-13	Common Stock	P	550000	$1.6192	Acquired	50575821	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 purchase of certain Shares reported herein were matchable under Section 16(b) of the Securities Exchange Act of 1934 with the sale of Shares at a price of $2.05 per share by an entity in which Casdin Capital, LLC ("Casdin"), Casdin Partners GP, LLC (the "GP") and Eli Casdin (collectively with Casdin and the GP, the "Disgorging Parties") had a pecuniary interest on the Disgorging Parties' Form 4 filed on June 21, 2024. The Disgorging Parties agree to pay to Issuer, upon settlement of the purchase, an additional $57.27 than the amount reported on the Disgorging Parties' Form 4 filed on August 6, 2024, which represents the full amount of the profit realized by the Disgorging Parties, as a result of their pecuniary interest in the entity what made the sale referenced above, in connection with the short-swing transaction.

F2: The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $1.611 to $1.62. 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.

F3: 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) the GP, the general partner of the Master Fund, and (iii) Eli Casdin, the managing member of Casdin and the GP.

F4: The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $1.6331 to $1.6978. 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 price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions within the range of $1.6151 to $1.6303. 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.

F6: 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.

F7: 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.

F8: 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.

F9: The securities are owned directly by Eli Casdin.

F10: 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.