Comparable stake leader
T. Rowe Price Investment Management, Inc.
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 Jul 2026
- Public ticker
- BLFS on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
T. Rowe Price Investment Management, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
T. Rowe Price Investment Management, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
17 Jul 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
T. Rowe Price Investment ...
Disclosed value leader
T. Rowe Price Investment ...
Comparable rows
50/50
Latest evidence
17 Jul 2026
13D/G
13F
3/4/5
Lead comparable stake: 14%
13D/G row: T. Rowe Price Investment Management, Inc.
Showing 1-8 of 50 holder rows.
Quick read
T. Rowe Price Investment Management, Inc. leads the comparable SEC ownership view at 14%.
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 T. Rowe Price Investment Management, Inc.'s linked filing trail.
Comparable ownership
Top 5
T. Rowe Price Investment Manageme...
14%
Casdin Capital, LLC
9.7%
Invesco Ltd.
4.9%
Casdin Partners GP, LLC
9.7%
Casdin Partners Master Fund, L.P.
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 |
|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. |
13D/G
13F
Company
|
14%
|
$130,842,618
6,506,346 shares
|
+$26,656,247 | 31 Mar 2026 |
| Casdin Capital, LLC |
13F
13D/G
3/4/5
Company · 10%+ Owner
|
9.7%
from 13D/G
|
$113,662,708
5,957,165 shares
|
— | 31 Mar 2026 |
| Invesco Ltd. |
13D/G
13F
Company
|
4.9%
|
$47,228,979
2,348,532 shares
|
-$31,847,382 | 31 Mar 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
|
-$73,035,325 | 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 |
| Roderick de Greef |
3/4/5
President and CEO, Director
|
1.5%
|
$13,946,926
730,971 shares
|
-$3,612,225 | 18 Jun 2026 |
| Aby J. Mathew |
3/4/5
EVP & Chief Scientific Officer
|
0.79%
|
$10,979,161
388,460 shares
|
-$95,595 | 07 Jul 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: -$164,886,877.
Buys
$0
Insiders: 0
Sells
$164,886,877
Insiders: 13
Net
-$164,886,877
Shares: -6,859,965
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 6,859,965
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 4,800,000 | $0 | $112,500,000 | -$112,500,000 |
| 3-6 | 0 | 102,218 | $0 | $2,058,401 | -$2,058,401 |
| 6-9 | 0 | 150,005 | $0 | $3,863,067 | -$3,863,067 |
| 9-12 | 0 | 1,807,742 | $0 | $46,465,409 | -$46,465,409 |
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
-$164,886,876
Latest report
17 Jul 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 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 |
| Casdin Partners Master Fund, L.P. | 10%+ Owner | $112,744,810 | -$73,035,325 | -39% | Filing P/S | 19 May 2026 |
| Roderick de Greef | President and CEO, Director | $13,946,926 | -$3,612,225 | -21% | Mixed | 18 Jun 2026 |
| Aby J. Mathew | EVP & Chief Scientific Officer | $10,979,161 | -$95,595 | -0.86% | Mixed | 07 Jul 2026 |
| Troy Wichterman | Chief Financial Officer | $6,027,120 | -$916,194 | -13% | Mixed | 07 Jul 2026 |
| Michael Rice | Former CEO and Director | $5,938,624 | Mixed | 30 Oct 2023 | ||
| Todd Berard | Chief Marketing Officer | $4,596,997 | -$316,324 | -6.4% | Mixed | 07 Jul 2026 |
| Garrie Richardson | Chief Revenue Officer | $2,883,098 | Filing P/S | 16 Sep 2024 | ||
| Karen A. Foster | Chief Quality and Operations | $2,084,890 | -$2,089,462 | -50% | Filing P/S | 23 Mar 2026 |
| Sarah Aebersold | Chief Human Resources Officer | $2,077,803 | -$75,059 | -3.5% | Mixed | 19 Mar 2026 |
| Sean Werner | Chief Technology Officer | $1,342,981 | -$17,650 | -1.3% | Median | 17 Jul 2026 |
| Rachel Ellingson | Director | $1,309,527 | Mixed | 24 Feb 2026 | ||
| Joydeep Goswami | Director | $1,200,262 | -$48,297 | -3.9% | Mixed | 24 Feb 2026 |
| Geraint Phillips | SVP, Global Operations | $1,095,567 | Filing P/S | 08 Mar 2024 | ||
| Timothy L. Moore | Director | $1,014,812 | Mixed | 24 Feb 2026 | ||
| Joseph C. Schick | Director | $729,620 | Mixed | 08 Mar 2024 | ||
| Marcus Schulz | Chief Revenue Officer | $720,280 | Mixed | 25 Aug 2023 | ||
| Amy DuRoss | Director | $606,431 | -$305,745 | -34% | Mixed | 24 Feb 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| Aby J. Mathew | BLFS | Common Stock | Tax liability | -0.13% | -515 | 390,167 | 08 Apr 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Tax liability | -0.18% | -293 | 163,768 | 08 Apr 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -0.39% | -844 | 216,056 | 08 Apr 2026 | Direct | ||
| Karen A. Foster | BLFS | Common Stock | Sale | -2.31% | $49,401 | $19.17 | -2,577 | 108,758 | 23 Mar 2026 | Direct |
| Roderick de Greef | BLFS | Common Stock | Tax liability | -1.49% | -11,101 | 733,746 | 19 Mar 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Tax liability | -1.13% | -1,879 | 164,061 | 19 Mar 2026 | Direct | ||
| Sean Werner | BLFS | Common Stock | Tax liability | -3.37% | -1,681 | 48,251 | 19 Mar 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -1.7% | -3,749 | 216,900 | 19 Mar 2026 | Direct | ||
| Sarah Aebersold | BLFS | Common Stock | Tax liability | -1% | -931 | 92,429 | 19 Mar 2026 | Direct | ||
| Karen A. Foster | BLFS | Common Stock | Tax liability | -1.68% | -1,907 | 111,335 | 19 Mar 2026 | Direct | ||
| Aby J. Mathew | BLFS | Common Stock | Tax liability | -0.57% | -2,255 | 390,682 | 19 Mar 2026 | Direct | ||
| Karen A. Foster | BLFS | Common Stock | Sale | -0.44% | $10,000 | $20.00 | -500 | 113,242 | 09 Mar 2026 | Direct |
| Karen A. Foster | BLFS | Common Stock | Sale | -46% | $1,952,998 | $20.15 | -96,923 | 113,742 | 05 Mar 2026 | Direct |
| Sean Werner | BLFS | Common Stock | Sale | -0.22% | $2,302 | $20.74 | -111 | 49,932 | 03 Mar 2026 | Direct |
| Karen A. Foster | BLFS | Common Stock | Sale | -0.2% | $8,669 | $20.74 | -418 | 210,665 | 03 Mar 2026 | Direct |
| Aby J. Mathew | BLFS | Common Stock | Sale | -0.13% | $10,971 | $20.74 | -529 | 392,937 | 03 Mar 2026 | Direct |
| Troy Wichterman | BLFS | Common Stock | Sale | -0.27% | $12,195 | $20.74 | -588 | 220,649 | 03 Mar 2026 | Direct |
| Sarah Aebersold | BLFS | Common Stock | Sale | -0.23% | $4,542 | $20.74 | -219 | 93,360 | 03 Mar 2026 | Direct |
| Todd Berard | BLFS | Common Stock | Sale | -0.21% | $7,321 | $20.74 | -353 | 165,940 | 03 Mar 2026 | Direct |
| Todd Berard | BLFS | Common Stock | Tax liability | -5.05% | -8,846 | 166,293 | 24 Feb 2026 | Direct | ||
| Todd Berard | BLFS | Common Stock | Award | 32.1% | 42,575 | 175,139 | 24 Feb 2026 | Direct | ||
| Amy DuRoss | BLFS | Common Stock | Award | 43.7% | 8,170 | 26,857 | 24 Feb 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Tax liability | -10.3% | -25,525 | 221,237 | 24 Feb 2026 | Direct | ||
| Troy Wichterman | BLFS | Common Stock | Award | 63.7% | 96,016 | 246,762 | 24 Feb 2026 | Direct | ||
| Anthony Hunt | BLFS | Common Stock | Award | 118.8% | 8,170 | 15,046 | 24 Feb 2026 | Direct | ||
| Catherine Coste | BLFS | Common Stock | Award | 143.3% | 8,170 | 13,871 | 24 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.