BioLife Solutions, Inc. (BLFS) Ownership
BLFS ownership summary
as of October 17, 2026- Institutions
- 105.5% of shares outstanding
- Insiders
- 2.61% of shares outstanding
- Shares outstanding
- 48.9M
- Float
- 40.1M shares available to trade
- Short interest
- 10.82% 3.9M shares short
- Days to cover
- 4.54 short interest down 1.1% vs prior month
- Institutions 105.51%
- Insiders 2.61%
BLFS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | T. Rowe Price Investment Management,Inc. | 13.80% | 6.8M | $260.7M | +244,789 (+3.8%) | June 30, 2026 |
| 2 | BlackRock Inc | 13.03% | 6.4M | $246.2M | +273,780 (+4.5%) | June 30, 2026 |
| 3 | Casdin Capital, LLC | 9.51% | 4.7M | $179.7M | −1.3M (−21.9%) | June 30, 2026 |
| 4 | Amvescap Plc. | 4.58% | 2.2M | $86.5M | −108,109 (−4.6%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.01% | 2.0M | $75.8M | +46,376 (+2.4%) | June 30, 2026 |
| 6 | State Street Corp | 3.38% | 1.7M | $63.9M | +78,851 (+5.0%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.22% | 1.1M | $42.0M | +114,938 (+11.8%) | June 30, 2026 |
| 8 | Massachusetts Financial Services Company | 2.21% | 1.1M | $41.7M | −117,987 (−9.9%) | June 30, 2026 |
| 9 | Fred Alger Management, LLC | 2.20% | 1.1M | $41.6M | −2,358 (−0.2%) | June 30, 2026 |
| 10 | Dimensional Fund Advisors, Inc. | 2.14% | 1.0M | $40.4M | +10,495 (+1.0%) | June 30, 2026 |
| 11 | FMR Inc | 2.03% | 993K | $38.3M | −477,146 (−32.5%) | June 30, 2026 |
| 12 | Bank of America Corp | 1.94% | 950K | $36.7M | +46,056 (+5.1%) | June 30, 2026 |
| 13 | Vanguard Portfolio Management, LLC | 1.87% | 913K | $35.3M | +48,188 (+5.6%) | June 30, 2026 |
| 14 | Royal Bank of Canada | 1.82% | 891K | $34.4M | +5,610 (+0.6%) | June 30, 2026 |
| 15 | UBS Group AG | 1.70% | 832K | $32.1M | +566,165 (+212.9%) | June 30, 2026 |
| 16 | Stephens Inv Mgmt Group LLC | 1.45% | 709K | $27.4M | +35,537 (+5.3%) | June 30, 2026 |
| 17 | Millennium Management LLC | 1.28% | 626K | $24.2M | +625,658 (0.0%) | June 30, 2026 |
| 18 | Royce & Associates, LP | 1.28% | 624K | $24.1M | +39,864 (+6.8%) | June 30, 2026 |
| 19 | Geneva Capital Management | 1.19% | 582K | $22.5M | −157,662 (−21.3%) | June 30, 2026 |
| 20 | Cramer Rosenthal McGlynn LLC | 1.18% | 576K | $22.2M | −57,020 (−9.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 2.1M shares and 7 cut 2.2M.
BLFS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.23% | 2.6M | $98.9M | +648 (+0.0%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.99% | 1.5M | $56.4M | — | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.28% | 1.1M | $43.0M | −12,864 (−1.1%) | September 30, 2026 |
| 4 | T. Rowe Price Small-Cap Stock | 2.24% | 1.1M | $42.4M | −1.4M (−55.4%) | August 31, 2026 |
| 5 | Invesco Main Street Small Cap R6 | 1.60% | 784K | $30.3M | — | August 31, 2026 |
| 6 | T. Rowe Price Instl Small-Cap Stock | 1.30% | 638K | $24.7M | −688,705 (−51.9%) | August 31, 2026 |
| 7 | T. Rowe Price Small-Cap Value | 1.28% | 628K | $24.3M | −5,759 (−0.9%) | August 31, 2026 |
| 8 | Fidelity Small Cap Growth | 1.19% | 583K | $22.5M | — | July 31, 2026 |
| 9 | Arbitrage R | 1.14% | 560K | $21.6M | +560,140 (0.0%) | August 31, 2026 |
| 10 | Fidelity Small Cap Index | 0.95% | 466K | $18.0M | +3,838 (+0.8%) | July 31, 2026 |
| 11 | Invesco V.I. Main Street Small Cap I | 0.82% | 399K | $15.4M | −14,366 (−3.5%) | August 31, 2026 |
| 12 | State Street SPDR Port S&P 600 Sm CpETF | 0.81% | 394K | $15.2M | — | September 30, 2026 |
| 13 | Alger Small Cap Focus I | 0.79% | 386K | $14.9M | −636,388 (−62.2%) | July 31, 2026 |
| 14 | iShares Russell 2000 Value ETF | 0.67% | 326K | $12.6M | +494 (+0.2%) | September 30, 2026 |
| 15 | Vanguard Tax-Managed Small Cap Adm | 0.61% | 299K | $11.5M | — | August 31, 2026 |
| 16 | Fidelity Small Cap Growth K6 | 0.60% | 292K | $11.3M | — | July 31, 2026 |
| 17 | Vanguard Russell 2000 ETF | 0.50% | 245K | $9.5M | +5,536 (+2.3%) | August 31, 2026 |
| 18 | Royce Micro-Cap Trust | 0.48% | 234K | $9.0M | +8,111 (+3.6%) | June 30, 2026 |
| 19 | MoA Small Cap Growth Fund | 0.47% | 231K | $8.9M | −49,794 (−17.7%) | September 30, 2026 |
| 20 | Schwab US Small-Cap ETF™ | 0.46% | 227K | $8.8M | +153 (+0.1%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
BLFS insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-09 | Karen A Foster | Sell | $20.00 | 500 | $10,000 |
| 2026-03-05 | Karen A Foster | Sell | $20.15 | 96,923 | $2.0M |
| 2026-03-03 | Aby J Mathew | Sell | $20.74 | 529 | $10,971 |
| 2026-03-03 | Karen A Foster | Sell | $20.74 | 418 | $8,669 |
| 2026-03-03 | Sarah Aebersold | Sell | $20.74 | 219 | $4,542 |
| 2026-03-03 | Sean Werner | Sell | $20.74 | 111 | $2,302 |
| 2026-03-03 | Todd Berard | Sell | $20.74 | 353 | $7,321 |
| 2026-03-03 | Troy Wichterman | Sell | $20.74 | 588 | $12,195 |
| 2026-01-06 | Sarah Aebersold | Sell | $25.59 | 241 | $6,167 |
| 2026-01-06 | Troy Wichterman | Sell | $25.59 | 990 | $25,334 |
| 2026-01-06 | Todd Berard | Sell | $25.59 | 344 | $8,803 |
| 2026-01-06 | Karen A Foster | Sell | $25.59 | 335 | $8,573 |
| 2026-01-06 | Aby J Mathew | Sell | $25.59 | 405 | $10,364 |
| 2025-12-15 | Amy Duross | Sell | $24.60 | 2,000 | $49,200 |
| 2025-12-15 | Sarah Aebersold | Sell | $24.46 | 713 | $17,440 |
| 2025-12-09 | Aby J Mathew | Sell | $25.13 | 631 | $15,857 |
| 2025-12-09 | Karen A Foster | Sell | $25.13 | 519 | $13,042 |
| 2025-12-09 | Sarah Aebersold | Sell | $25.13 | 233 | $5,855 |
| 2025-12-09 | Todd Berard | Sell | $25.13 | 358 | $8,997 |
| 2025-12-09 | Troy Wichterman | Sell | $25.13 | 1,033 | $25,959 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
BLFS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns BLFS
Institutional investors own 105.5% of BioLife Solutions's shares and insiders 2.61%. The largest holder is T. Rowe Price Investment Management,Inc. with 13.80% of the shares (6.8M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 7 reduced their stake in the latest filings. Short interest is 10.82% of the float, or 4.54 days of average trading volume. The share count rose 302.8% since 2014.
Related: BLFS analyst forecast, BLFS key metrics. See the BLFS stock overview for the latest quote and news.
BLFS ownership FAQ
Who owns the most BioLife Solutions stock?
The largest shareholders of BioLife Solutions are T. Rowe Price Investment Management,Inc. (13.80%), BlackRock Inc (13.03%), Casdin Capital, LLC (9.51%), Amvescap Plc. (4.58%), Vanguard Capital Management, LLC (4.01%).
What percentage of BioLife Solutions is owned by institutions?
Institutions hold 105.5% of BioLife Solutions's shares outstanding; insiders hold 2.61%.
Which funds own BioLife Solutions?
The largest fund holders of BioLife Solutions are iShares Core S&P Small-Cap ETF (5.23%), Vanguard MStar Total Stk Mkt Idx Invest (2.99%), iShares Russell 2000 ETF (2.28%), T. Rowe Price Small-Cap Stock (2.24%), Invesco Main Street Small Cap R6 (1.60%).
What is BioLife Solutions's short interest?
3.9M shares of BioLife Solutions were sold short, 10.82% of the float; at the average daily volume it would take 4.54 days to cover.
Are insiders buying or selling BioLife Solutions?
Of the latest 20 reported insider transactions in BioLife Solutions (since December 9, 2025), 0 were purchases and 20 were sales.
How many shares of BioLife Solutions are outstanding?
BioLife Solutions has 48.9M shares outstanding, of which 40.1M are in the public float.