BioLife Solutions, Inc. (BLFS)10% owner sold ~$15.4M

~$15.4M

Approx. value · 650K sh @ $23.70

4.76M

Holds after · shares reported

Traded

May 21, 2026

Filed

May 21, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Mar 23, 2026InsiderOfficer sold ~$49K of BLFS shares in the open market
2. May 7, 2026Company filing · Form 8-K · ResultsReported its results
3. May 19, 2026Insider10% owner sold ~$6.79M of BLFS shares in the open market
4. May 20, 2026Insider10% owner sold ~$5.92M of BLFS shares in the open market
5. May 21, 2026 · this disclosureInsider10% owner sold ~$15.4M of BLFS shares in the open market

What came next

1. Jul 21, 2026Company filing · Form 8-K · Material agreement, Reg FDSigned an important agreement, and shared information with investors
2. Aug 6, 2026Company filing · Form 8-K · ResultsReported its results
3. Aug 20, 2026Federal contract · $45K obligatedDepartment of Health and Human Services awarded BIOLIFE SOLUTIONS INC: $45K obligated to date

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for BioLife Solutions, Inc.

For BioLife Solutions, Inc., OQRO holds 1 federal contract award dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its BLFS page.

Other recent filings by Casdin Partners Master Fund, L.P., 10% owner

• SEC Form 4 at BioLife Solutions, Inc. (BLFS)May 21, 2026
• SEC Form 4 at BioLife Solutions, Inc. (BLFS)May 21, 2026
• SEC Form 4 at BioLife Solutions, Inc. (BLFS)Oct 17, 2025
• SEC Form 4 at Standard Biotools (LAB)Sep 12, 2025
• SEC Form 4 at Standard Biotools (LAB)Sep 5, 2025

The full history of Casdin Partners Master Fund, L.P., 10% owner is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at BioLife Solutions, Inc.

• USAspending.gov award recordAug 31, 2026
• SEC Form 4May 21, 2026
• SEC Form 4May 21, 2026
• SEC Form 4Mar 31, 2026
• SEC Form 4Mar 9, 2026
• SEC Form 4Mar 9, 2026

Everything OQRO holds on this company is on its BLFS page.