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 Mar 31, 2025
Ownership Breakdown
193
Institutional Holders
▲ 10 vs Q4
$1.13B
Total Inst. Value
▼ $89.36M vs Q4
48.86M
Shares Outstanding
freeFloat 87.69%
48.19M
13F Shares Held
▲ 1.36M vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
CASDIN CAPITAL, LLC electromedical & electrotherapeutic apparatus | 8.71M | 18.47% | 18.47% | $198.87B | May 15, 2025 | — held |
BLACKROCK, INC. electromedical & electrotherapeutic apparatus | 5.47M | 11.61% | 11.61% | $124.99B | May 2, 2025 | ▼ 130.6K |
INVESCO LTD. electromedical & electrotherapeutic apparatus | 3.55M | 7.53% | 7.53% | $81.11B | May 12, 2025 | ▲ 311.6K |
VANGUARD GROUP INC electromedical & electrotherapeutic apparatus | 2.80M | 5.95% | 5.95% | $64.05B | May 9, 2025 | ▼ 32.1K |
FRED ALGER MANAGEMENT, LLC electromedical & electrotherapeutic apparatus | 1.53M | 3.25% | 3.25% | $35.02B | May 16, 2025 | ▼ 61.1K |
STATE STREET CORP electromedical & electrotherapeutic apparatus | 1.43M | 3.04% | 3.04% | $32.75B | May 15, 2025 | ▼ 35.3K |
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. electromedical & electrotherapeutic apparatus | 1.35M | 2.86% | 2.86% | $30.79B | May 14, 2025 | NEW |
AMERIPRISE FINANCIAL INC electromedical & electrotherapeutic apparatus | 970.4K | 2.06% | 2.06% | $22.16B | May 14, 2025 | ▲ 131.3K |
ROCKEFELLER CAPITAL MANAGEMENT L.P. electromedical & electrotherapeutic apparatus | 964.3K | 2.05% | 2.05% | $22.02B | May 14, 2025 | ▲ 142.5K |
PALISADE CAPITAL MANAGEMENT, LP electromedical & electrotherapeutic apparatus | 947.1K | 2.01% | 2.01% | $21.63B | Apr 29, 2025 | ▲ 113.9K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
23
Increased
+1.87M shares3
New Positions
first time holders21
Decreased
−1.76M shares0
Sold Out
fully exitedNet shares change (top 50)
+112.1K
+1.87M / −1.76M
Net new holders
+5
3 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 98.6% 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 8.71 million shares — equal to 18.47% of outstanding shares — as of March 31, 2025.
A total of 193 institutional investors currently hold BLFS stock, with a combined institutional value of approximately $1.13 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 98.6% of shares. The largest shareholder is CASDIN CAPITAL, LLC with a 18.47% stake. Company insiders hold 12.31%. Data sourced from SEC Form 13F as of March 31, 2025.