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LAB - Standard Biotools Inc.

Insider Purchase by Casdin Partners Master Fund, L.P. (Dir, 10%)

6 Months
After Trade
Before Trade

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Trade Summary

3 months ago, Casdin Partners Master Fund, L.P., serving as Dir, 10% owner at Standard Biotools Inc. (LAB), purchased 1,075,000 shares at $1.28 per share, for a total transaction value of $1,374,575.00. Following this transaction, Casdin Partners Master Fund, L.P. now holds 83,634,918 shares of LAB.

This purchase represents a 1.00% increase in Casdin Partners Master Fund, L.P.'s stake in the company. This is considered a medium-conviction trade.

The trade was executed on Tuesday, November 18, 2025 and publicly disclosed via SEC Form 4 filing on Thursday, November 20, 2025, 2 days after the trade was made.

Standard Biotools Inc. operates in the HEALTHCARE sector, specifically within the MEDICAL DEVICES industry. Insider buying activity in this sector can provide valuable signals about industry trends and company-specific developments.

Casdin Partners Master Fund, L.P.

Dir, 10%

Casdin Partners Master Fund, L.P. is a Delaware-incorporated investment fund (EIN: 770513190) focused on the life sciences sector, including healthcare, biotechnology, synthetic biology, and related technologies.[[4]](https://whalewisdom.com/filer/casdin-partners-master-fund-lp)[[8]](https://www.sec.gov/Archives/edgar/data/1162194/000091957424000224/0000919574-24-000224-index.htm)[[3]](https://casdincapital.com) Headquartered at Walker House, 87 Mary Street, George Town, Cayman Islands, it operates as part of the Casdin Capital ecosystem, which invests in companies leveraging molecular information for innovation in diagnostics, precision therapies, genomics, and data platforms.[[3]](https://casdincapital.com)[[5]](https://www.dnb.com/business-directory/company-profiles.casdin_partners_master_fund_lp.d3229e1a6ebdd368aedfa449a74431b3.html) The fund serves as a Director and 10% Owner of Standard BioTools Inc. (LAB), holding approximately 91,684,918 shares as of recent filings, with notable transactions including purchases and awards in 2024.[[1]](https://www.gurufocus.com/insider/34986/casdin-partners-master-fund,-l.p.)[[2]](https://fintel.io/n/casdin-partners-master-fund) It has a history of active investments as a 10% Owner or Director in biotech firms such as BioLife Solutions (BLFS), GeneDx Holdings (WGS), MaxCyte (MXCT), and others, reflecting a strategy of building significant positions in high-growth life sciences companies.[[2]](https://fintel.io/n/casdin-partners-master-fund) Eli Casdin, managing member of the associated Casdin entity and general partner, oversees its investment advisory activities.[[6]](https://www.sec.gov/Archives/edgar/data/834365/000091957425004704/xslSCHEDULE_13D_X01/primary_doc.xml)

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Trade Price

$1.28

Quantity

1,075,000

Total Value

$1,374,575.00

Shares Owned

83,634,918

Trade Date

Tuesday, November 18, 2025

96 days ago

SEC Filing Date

Thursday, November 20, 2025

Filed 2 days after trade

HEALTHCAREMEDICAL DEVICES

About Standard Biotools Inc.

Company Overview

No company information available
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