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SCHEDULE Filed 2025-03-04 Event 2025-02-28 SEC 0000919574-25-001773 →

Casdin Capital, LLC STANDARD BIOTOOLS INC. LAB

Stake: 21.60% Shares: 80,864,315 CUSIP: 34385P108 Class: Common Stock, par value $0.001 per share

Item 4 — Purpose of Transaction

Eli Casdin is a member of the Board of Directors of the Issuer. The Reporting Persons have acquired their shares of the Issuer for investment purposes. The Reporting Persons intend to review their holdings in the Issuer on a continuing basis and, depending upon the price and availability of the Issuer's securities, subsequent developments affecting the Issuer, the business prospects of the Issuer, general stock market and economic conditions, tax considerations, investment considerations and/or other factors deemed relevant, may consider increasing or decreasing their investments in the Issuer. On January 5, 2024, the Issuer completed the previously announced merger pursuant to the Agreement and Plan of Merger, dated as of October 4, 2023 (the "Merger Agreement"), by and among the Issuer, SomaLogic, Inc., a Delaware corporation ("SomaLogic"), and Martis Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of the Issuer ("Merger Sub"). Pursuant to the Merger Agreement, Merger Sub merged with and into SomaLogic, with SomaLogic surviving as a wholly owned subsidiary of the Issuer (the "Merger"). At the consummation of the Merger, each issued and outstanding share of common stock of SomaLogic, par value $0.0001 per share ("SomaLogic Common Stock"), was converted into the right to receive 1.11 (the "Exchange Ratio") Shares, and cash in lieu of fractional shares. In addition, as of the effective time of the Merger, the Issuer assumed each SomaLogic stock incentive plan, each outstanding option to purchase shares of SomaLogic Common Stock (the "Options") and each outstanding restricted stock unit convertible into shares of SomaLogic Common Stock (the "RSUs," and together with the Options, the "Equity Awards"), whether vested or unvested. Each such Equity Award assumed by the Issuer will continue to have, and be subject to, the same terms and conditions applicable to such Equity Award immediately prior to the effective time of the Merger, except that (A) each such Option will be exercisable for that number of Shares equal to the number of shares of SomaLogic Common Stock subject to such Option immediately prior to the effective time of the Merger multiplied by the Exchange Ratio and rounded down to the next nearest Share, (B) the exercise price per share will be the exercise price per share in effect for that Option immediately prior to the effective time of the Merger divided by the Exchange Ratio and rounded up to the next nearest cent and (C) each such RSU will vest for that number of Shares equal to the number of shares of SomaLogic Common Stock subject to such RSU immediately prior to the effective time of the Merger multiplied by the Exchange Ratio and rounded to the next nearest Share. In addition, as of the effective time of the Merger, each SomaLogic warrant, each exercisable for one share of SomaLogic Common Stock, shall be treated in accordance with its terms. The description of the Merger Agreement and related transactions (including, without limitation, the Merger) is subject and qualified in its entirety by reference to the full text of the Merger Agreement, a copy of which is incorporated herein by reference to Exhibit 2.1 of the 8-K filed by the Issuer on January 5, 2024. Except as set forth in this Schedule 13D, none of the Reporting Persons have any plan or proposals that relate to or would result in any of the transactions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. However, each of the Reporting Persons reserves the right to change its plans at any time, as it deems appropriate, in light of its ongoing evaluation of (i) its business and liquidity objectives, (ii) the Issuer's financial condition, business, operations, competitive position, prospects and/or share price, (iii) industry, economic and/or securities markets conditions, (iv) alternative investment opportunities and (v) other relevant factors. Without limiting the generality of the preceding sentence, each of the Reporting Persons reserves the right (subject to any applicable restrictions under law or contracts by which it is bound) to at any time or from time to time (A) purchase or otherwise acquire additional shares of Common Stock or other securities of the Issuer, or instruments convertible into or exercisable for any such securities (collectively, "Issuer Securities"), in the open market, in privately negotiated transactions or otherwise, (B) sell, transfer or otherwise dispose of Issuer Securities in public or private transactions, (C) acquire or write options contracts, or enter into derivatives or hedging transactions, relating to Issuer Securities, (D) pledge Issuer Securities to secure obligations of the Reporting Persons and/or (E) encourage (including, without limitation, through any designated or nominated member of the Issuer's board of directors (the "Board of Directors") and/or communications with directors, management and existing or prospective security holders, investors or

Cross-References

Insider Activity (last 365d)
3 transactions
3 buys · 0 sales · 0 awards/exercises
Issuer Cluster
3 13D/G filings on this issuer
2 other filings besides this one
Filer Track Record
2 filings by this filer
1 other filing in the data moat
Short Interest · settle 2026-03-31
DTC 5.59
10,319,954 shares short · +24.6% vs prior

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $183K
Point72 Asset Mgmt

Post-Filing Returns · since 2025-02-28 on LAB

+1 day
-5.6%
+5 days
+12.1%
+30 days
+0.9%
+60 days
+8.4%
+90 days
-0.9%
+180 days
+19.6%

Anchor price 1.07 on closest trading day on/after 2025-02-28. Source: Yahoo Finance daily adj_close (split + dividend adjusted).

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-03-20 Egholm Michael director, officer Award 1,042,373
2026-03-20 Mackay Sean officer Award 272,107
2026-03-20 Kim Hanjoon Alex officer Award 323,173

Other 13D/G Filings on STANDARD BIOTOOLS INC.

FiledFormFilerStakeShares
2018-03-06 SC LEVIN CAPITAL STRATEGIES, L.P. view →
2018-01-11 SC LEVIN CAPITAL STRATEGIES, L.P. view →

Other Filings by Casdin Capital, LLC

FiledFormIssuerStakeShares
2025-03-07 SCHEDULE Tenaya Therapeutics, Inc. TNYA 4.30% 6,732,971 view →

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