BioLife Solutions, Inc.
BioLife Solutions, Inc. (BLFS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BLFS · as of Sep 30, 2025
Ownership Breakdown
191
Institutional Holders
▼ 2 vs Q2
$1.23B
Total Inst. Value
▲ $153.61M vs Q2
48.86M
Shares Outstanding
freeFloat 87.69%
48.29M
13F Shares Held
▼ 1.60M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
BLFS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
CASDIN CAPITAL, LLC electromedical & electrotherapeutic apparatus | 6.71M | 14.03% | 14.03% | $171.10B | Nov 14, 2025 | ▼ 1.00M |
BLACKROCK, INC. electromedical & electrotherapeutic apparatus | 5.60M | 11.72% | 11.72% | $142.87B | Nov 12, 2025 | ▲ 62.9K |
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. electromedical & electrotherapeutic apparatus | 4.07M | 8.51% | 8.51% | $103.75B | Nov 14, 2025 | ▼ 179.9K |
INVESCO LTD. electromedical & electrotherapeutic apparatus | 3.60M | 7.53% | 7.53% | $91.82B | Nov 13, 2025 | ▲ 18.7K |
VANGUARD GROUP INC electromedical & electrotherapeutic apparatus | 2.97M | 6.21% | 6.21% | $75.70B | Nov 7, 2025 | ▲ 70.2K |
STATE STREET CORP electromedical & electrotherapeutic apparatus | 1.46M | 3.05% | 3.05% | $37.16B | Nov 14, 2025 | ▲ 47.6K |
FRED ALGER MANAGEMENT, LLC electromedical & electrotherapeutic apparatus | 1.11M | 2.32% | 2.32% | $28.29B | Nov 14, 2025 | ▼ 139.1K |
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ electromedical & electrotherapeutic apparatus | 1.10M | 2.30% | 2.30% | $27.99B | Oct 29, 2025 | ▼ 4.7K |
FMR LLC electromedical & electrotherapeutic apparatus | 1.02M | 2.13% | 2.13% | $25.91B | Nov 13, 2025 | ▲ 1.01M |
ROCKEFELLER CAPITAL MANAGEMENT L.P. electromedical & electrotherapeutic apparatus | 1.01M | 2.11% | 2.11% | $25.77B | Nov 14, 2025 | ▼ 16.3K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
21
Increased
+1.93M shares1
New Positions
first time holders25
Decreased
−3.00M shares0
Sold Out
fully exitedNet shares change (top 50)
1.07M
+1.93M / −3.00M
Net new holders
-3
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
BLFS insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
6
Sell transactions
0.00
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Casdin Partners Master Fund, L.P. 10 percent owner | May 19, 2026 | Sale | 300,000 | $22.65 | $6.79M | 5.66M | Form 4 ↗ |
Casdin Partners Master Fund, L.P. 10 percent owner | May 20, 2026 | Sale | 250,000 | $23.70 | $5.92M | 5.41M | Form 4 ↗ |
Casdin Partners Master Fund, L.P. 10 percent owner | May 21, 2026 | Sale | 650,000 | $23.70 | $15.40M | 4.76M | Form 4 ↗ |
Mathew Aby J. EVP & Chief Scientific Officer | Apr 8, 2026 | Tax Withhold | 515 | $19.27 | $9.9K | 390.2K | Form 4 ↗ |
Berard Todd Chief Marketing Officer | Apr 8, 2026 | Tax Withhold | 293 | $19.27 | $5.6K | 163.8K | Form 4 ↗ |
Wichterman Troy Chief Financial Officer | Apr 8, 2026 | Tax Withhold | 844 | $19.27 | $16.3K | 216.1K | Form 4 ↗ |
Foster Karen A. Chief Quality and Operations | Mar 23, 2026 | Sale | 2,577 | $19.17 | $49.4K | 108.8K | Form 4 ↗ |
DE GREEF RODERICK President and CEO | Mar 19, 2026 | Tax Withhold | 11,101 | $19.12 | $212.3K | 733.7K | Form 4 ↗ |
Berard Todd Chief Marketing Officer | Mar 19, 2026 | Tax Withhold | 1,879 | $19.12 | $35.9K | 164.1K | Form 4 ↗ |
Werner Sean Chief Technology Officer | Mar 19, 2026 | Tax Withhold | 1,681 | $19.12 | $32.1K | 48.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
BioLife Solutions, Inc. (BLFS) is primarily owned by institutional investors, who hold approximately 98.8% of total shares outstanding. Company insiders own approximately 12.31%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of BioLife Solutions, Inc. is CASDIN CAPITAL, LLC, holding approximately 6.71 million shares — equal to 14.03% of outstanding shares — as of September 30, 2025.
A total of 191 institutional investors currently hold BLFS stock, with a combined institutional value of approximately $1.23 billion as of the most recent 13F filing period.
Frequently asked questions
BLFS ownershipBioLife Solutions, Inc. (BLFS) is primarily owned by institutional investors, who hold approximately 98.8% of shares. The largest shareholder is CASDIN CAPITAL, LLC with a 14.03% stake. Company insiders hold 12.31%. Data sourced from SEC Form 13F as of September 30, 2025.