Comparable stake leader
Casdin Capital, LLC
SEC ownership of BIOLIFE SOLUTIONS INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000834365.
Disclosed value leader
T. Rowe Price Investment Management, Inc.
Comparable rows
50/50
Latest evidence
17 Sep 2026
- Public ticker
- BLFS on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Casdin Capital, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Casdin Capital, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
17 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000834365
- Issuer location
- Bothell, WA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of BIOLIFE SOLUTIONS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Casdin Capital, LLC
Disclosed value leader
T. Rowe Price Investment ...
Comparable rows
50/50
Latest evidence
17 Sep 2026
13F
13D/G
3/4/5
Lead comparable stake: 9.7%
13D/G row: Casdin Capital, LLC
Showing 1-8 of 50 holder rows.
Quick read
Casdin Capital, LLC leads the comparable SEC ownership view at 9.7%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Casdin Capital, LLC's linked filing trail.
Comparable ownership
Top 5
Casdin Capital, LLC
9.7%
T. Rowe Price Investment Manageme...
7.5%
GLAZER CAPITAL, LLC
5.5%
Invesco Ltd.
4.9%
Casdin Partners GP, LLC
9.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Casdin Capital, LLC |
13F
13D/G
3/4/5
Company · 10%+ Owner
|
9.7%
from 13D/G
|
$131,457,200
4,655,000 shares
|
— | 30 Jun 2026 |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
Company
|
7.5%
from 13D/G
|
$190,653,000
6,751,135 shares
|
— | 30 Jun 2026 |
| GLAZER CAPITAL, LLC |
13D/G
|
5.5%
|
$99,874,489
2,685,520 shares
|
$0 | 17 Sep 2026 |
| Invesco Ltd. |
13F
13D/G
Company
|
4.9%
from 13D/G
|
$63,269,546
2,240,423 shares
|
— | 30 Jun 2026 |
| Casdin Partners GP, LLC |
3/4/5
10%+ Owner
|
9.7%
|
$112,744,810
4,757,165 shares
|
-$28,125,000 | 19 May 2026 |
| Casdin Partners Master Fund, L.P. |
3/4/5
10%+ Owner
|
9.7%
|
$112,744,810
4,757,165 shares
|
-$49,535,325 | 19 May 2026 |
| Eli Casdin |
3/4/5
10%+ Owner
|
9.7%
|
$112,744,810
4,757,165 shares
|
-$28,125,000 | 19 May 2026 |
| Karen A. Foster |
3/4/5
Chief Quality and Operations
|
0.22%
|
$2,084,890
108,758 shares
|
-$2,053,781 | 23 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$140,919,544.
Buys
$0
Insiders: 0
Sells
$140,919,544
Insiders: 13
Net
-$140,919,544
Shares: -5,841,959
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 5,841,959
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 4,800,000 | $0 | $112,500,000 | -$112,500,000 |
| 6-9 | 0 | 102,218 | $0 | $2,058,401 | -$2,058,401 |
| 9-12 | 0 | 939,741 | $0 | $26,361,143 | -$26,361,143 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 25 reporting-owner rows connected to BIOLIFE SOLUTIONS INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
25
Largest Forms 3/4/5 holder
Eli Casdin
Net 12M change
-$140,919,543
Latest report
06 Oct 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Eli Casdin | 10%+ Owner | $112,744,810 | -$28,125,000 | -20% | Filing P/S | 19 May 2026 |
| Casdin Partners Master Fund, L.P. | 10%+ Owner | $112,744,810 | -$49,535,325 | -31% | Filing P/S | 19 May 2026 |
| Casdin Partners GP, LLC | 10%+ Owner | $112,744,810 | -$28,125,000 | -20% | Filing P/S | 19 May 2026 |
| Casdin Capital, LLC | 10%+ Owner | $112,744,810 | -$28,125,000 | -20% | Filing P/S | 19 May 2026 |
| Michael Rice | Former CEO and Director | $5,938,624 | Mixed | 30 Oct 2023 | ||
| Garrie Richardson | Chief Revenue Officer | $2,883,098 | Filing P/S | 16 Sep 2024 | ||
| Karen A. Foster | Chief Quality and Operations | $2,084,890 | -$2,053,781 | -50% | Filing P/S | 23 Mar 2026 |
| Sarah Aebersold | Chief Human Resources Officer | $2,077,803 | -$39,807 | -1.9% | Mixed | 19 Mar 2026 |
| Geraint Phillips | SVP, Global Operations | $1,095,567 | Filing P/S | 08 Mar 2024 | ||
| Joseph C. Schick | Director | $729,620 | Mixed | 08 Mar 2024 | ||
| Marcus Schulz | Chief Revenue Officer | $720,280 | Mixed | 25 Aug 2023 | ||
| Dusty Tenney | COO and President | $548,872 | Mixed | 03 May 2021 | ||
| Raymond W. Cohen | Director | $475,025 | Mixed | 12 Jul 2021 | ||
| Andrew G. Hinson | Director | $302,419 | Mixed | 16 Aug 2021 | ||
| Roderick de Greef | Chief Executive Officer, Director | $0 | -$3,612,225 | -100% | Mixed | 06 Oct 2026 |
| Rachel Ellingson | Director | $0 | Mixed | 06 Oct 2026 | ||
| Amy DuRoss | Director | $0 | -$305,745 | -100% | Mixed | 06 Oct 2026 |
| Todd Berard | Chief Marketing Officer | $0 | -$34,506 | -100% | Mixed | 06 Oct 2026 |
| Troy Wichterman | Chief Financial Officer | $0 | -$850,705 | -100% | Mixed | 06 Oct 2026 |
| Joydeep Goswami | Director | $0 | -$48,297 | -100% | Mixed | 06 Oct 2026 |
Recent insider transactions for BIOLIFE SOLUTIONS INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Troy Wichterman | BLFS | Common Stock | Disposed to Issuer | -100% | -256,000 | 0 | 06 Oct 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -34.4% | -95,933 | 183,248 | 06 Oct 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Award | 98.5% | 138,504 | 279,181 | 06 Oct 2026 | Direct | ||
| Joydeep Goswami | BLFS | Common Stock | Disposed to Issuer | -100% | -53,156 | 0 | 06 Oct 2026 | Direct | ||
| Rachel Ellingson | BLFS | Common Stock | Disposed to Issuer | -100% | -57,995 | 0 | 06 Oct 2026 | Direct | ||
| Amy DuRoss | BLFS | Common Stock | Disposed to Issuer | -100% | -26,857 | 0 | 06 Oct 2026 | Direct | ||
| Catherine Coste | BLFS | Common Stock | Disposed to Issuer | -100% | -13,871 | 0 | 06 Oct 2026 | Direct | ||
| Roderick de Greef | BLFS | Common Stock | Disposed to Issuer | -100% | -826,454 | 0 | 06 Oct 2026 | Direct | ||
| Roderick de Greef | BLFS | Common Stock | Tax liability | -45.4% | -364,872 | 439,774 | 06 Oct 2026 | Direct | ||
| Roderick de Greef | BLFS | Common Stock | Award | 135.6% | 463,130 | 804,646 | 06 Oct 2026 | Direct | ||
| Anthony Hunt | BLFS | Common Stock | Disposed to Issuer | -100% | -15,046 | 0 | 06 Oct 2026 | Direct | ||
| Timothy L. Moore | BLFS | Common Stock | Disposed to Issuer | -100% | -44,943 | 0 | 06 Oct 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Disposed to Issuer | -100% | -404,608 | 0 | 06 Oct 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Tax liability | -18.2% | -70,000 | 314,058 | 06 Oct 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Award | 28.9% | 86,030 | 384,058 | 06 Oct 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Disposed to Issuer | -100% | -194,786 | 0 | 06 Oct 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Tax liability | -22.8% | -46,170 | 156,589 | 06 Oct 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Award | 63% | 78,390 | 202,759 | 06 Oct 2026 | Direct | ||
| Sean Werner | BLFS | Common Stock | Disposed to Issuer | -100% | -69,979 | 0 | 06 Oct 2026 | Direct | ||
| Sean Werner | BLFS | Common Stock | Tax liability | -74.8% | -71,226 | 24,039 | 06 Oct 2026 | Direct | ||
| Sean Werner | BLFS | Common Stock | Award | 7872% | 94,070 | 95,265 | 06 Oct 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Tax liability | -0.29% | -470 | 161,823 | 18 Sep 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Tax liability | -0.15% | -564 | 387,269 | 18 Sep 2026 | Direct | ||
| Sean Werner | BLFS | Common Stock | Tax liability | -0.89% | -421 | 47,135 | 18 Sep 2026 | Direct | ||
| Roderick de Greef | BLFS | Common Stock | Tax liability | -0.38% | -2,775 | 728,196 | 18 Sep 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -0.44% | -937 | 211,286 | 18 Sep 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Tax liability | -0.22% | -356 | 162,293 | 08 Sep 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Tax liability | -0.16% | -627 | 387,833 | 08 Sep 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -0.48% | -1,026 | 212,223 | 08 Sep 2026 | Direct | ||
| Sean Werner | BLFS | Common Stock | Tax liability | -0.57% | -275 | 47,556 | 17 Jul 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -0.39% | -844 | 213,249 | 07 Jul 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Tax liability | -0.13% | -516 | 388,460 | 07 Jul 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Tax liability | -0.18% | -293 | 162,649 | 07 Jul 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Tax liability | -0.29% | -470 | 162,942 | 18 Jun 2026 | Direct | ||
| Sean Werner | BLFS | Common Stock | Tax liability | -0.87% | -420 | 47,831 | 18 Jun 2026 | Direct | ||
| Roderick de Greef | BLFS | Common Stock | Tax liability | -0.38% | -2,775 | 730,971 | 18 Jun 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -0.44% | -937 | 214,093 | 18 Jun 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Tax liability | -0.14% | -564 | 388,976 | 18 Jun 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -0.47% | -1,026 | 215,030 | 08 Jun 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Tax liability | -0.22% | -356 | 163,412 | 08 Jun 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Tax liability | -0.16% | -627 | 389,540 | 08 Jun 2026 | Direct | ||
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -12% | $15,405,000 | $23.70 | -650,000 | 4,757,165 | 21 May 2026 | See footnote |
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -12% | $15,405,000 | $23.70 | -650,000 | 4,757,165 | 21 May 2026 | See footnote |
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -12% | $15,405,000 | $23.70 | -650,000 | 4,757,165 | 21 May 2026 | See footnote |
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -12% | $15,405,000 | $23.70 | -650,000 | 4,757,165 | 21 May 2026 | See footnote |
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -4.42% | $5,925,000 | $23.70 | -250,000 | 5,407,165 | 20 May 2026 | See footnote |
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -4.42% | $5,925,000 | $23.70 | -250,000 | 5,407,165 | 20 May 2026 | See footnote |
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -4.42% | $5,925,000 | $23.70 | -250,000 | 5,407,165 | 20 May 2026 | See footnote |
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -4.42% | $5,925,000 | $23.70 | -250,000 | 5,407,165 | 20 May 2026 | See footnote |
| Casdin Partners Master Fund, L.P. | BLFS | Common Stock, par value $0.001 per share | Sale | -5.04% | $6,795,000 | $22.65 | -300,000 | 5,657,165 | 19 May 2026 | See footnote |
* marks a reported price that did not pass the local price check.