United States Healthcare Equipment & Supplies

Biolife Solutions Inc (BLFS)

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Biolife Solutions Inc. has seen significant insider selling over the past 90 days, totaling approximately $56.4 million. The activity was primarily driven by Casdin Partners Master Fund, L.P., a 10% shareholder, alongside smaller planned sales by company executives. These transactions occurred as the stock price reached near 52-week highs, reflecting a 53.4% increase over the last quarter.
Ticker: BLFS Exchange: NAS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Biolife Solutions Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Proposed sale 21 May 2026
Value US$3,955,260.42 | Price 44.55 | Shares 96,045
Sale 21 May 2026
Value US$4,837,095.13 | Price 56.30 | Shares 98,929 (-19.9%)
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-05-21 2026-05-21 PrS Proposed sale
3.3
Casdin Partners Master Fund, L.P.

10% Shareholder

Large shareholder
96,045
44.55
US$3,955,260 		96,045 44.55 US$3,955,260
2026-05-21 2026-05-21 S Sale
3.3
Casdin Partners Master Fund, L.P.
Large shareholder
98,929 -19.9%
56.30
US$4,837,095 		98,929 -19.9% 56.30 US$4,837,095
2026-05-21 2026-05-20 S Sale
3.3
Casdin Partners Master Fund, L.P.
Large shareholder
27,477 +2.3%
365.95
US$4,309,645 		27,477 +2.3% 365.95 US$4,309,645
2026-05-20 2026-05-20 PrS Proposed sale
3.3
Casdin Partners Master Fund, L.P

10% Shareholder

Large shareholder
250,000
24.00
US$6,000,000 		250,000 24.00 US$6,000,000
2026-05-21 2026-05-19 S Sale
3.3
Casdin Partners Master Fund, L.P.
Large shareholder
300,000 -5.0%
22.65
US$6,795,000 		300,000 -5.0% 22.65 US$6,795,000
2026-05-19 2026-05-19 PrS Proposed sale
3.3
Casdin Partners Master Fund, L.P.

10% Shareholder

Large shareholder
300,000
22.30
US$6,690,000 		300,000 22.30 US$6,690,000
2026-03-31 2026-03-23 PlS Planned sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
2,577 -2.3%
19.17
US$49,401 		2,577 -2.3% 19.17 US$49,401
2026-03-23 2026-03-23 PrS Proposed sale
2.9
KAREN FOSTER

Officer

Officer
2,577
18.85
US$48,576 		2,577 18.85 US$48,576
2026-03-09 2026-03-09 S Sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
500 -0.4%
20.00
US$10,000 		500 -0.4% 20.00 US$10,000
2026-03-09 2026-03-09 PrS Proposed sale
2.9
KAREN FOSTER

Officer

Officer
500
19.86
US$9,930 		500 19.86 US$9,930
2026-03-09 2026-03-05 S Sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
96,923 -46.0%
20.15
US$1,952,998 		96,923 -46.0% 20.15 US$1,952,998
2026-03-05 2026-03-05 PrS Proposed sale
2.9
KAREN FOSTER

Officer

Officer
96,923
20.67
US$2,003,398 		96,923 20.67 US$2,003,398
2026-03-05 2026-03-03 PlS Planned sale
Werner Sean

Chief Technology Officer

Officer
111 -0.2%
20.74
US$2,302 		111 -0.2% 20.74 US$2,302
2026-03-05 2026-03-03 PlS Planned sale
3.4
Mathew Aby J.

EVP & Chief Scientific Officer

Officer
529 -0.1%
20.74
US$10,971 		529 -0.1% 20.74 US$10,971
2026-03-05 2026-03-03 PlS Planned sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
219 -0.2%
20.74
US$4,542 		219 -0.2% 20.74 US$4,542
2026-03-05 2026-03-03 PlS Planned sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
418 -0.2%
20.74
US$8,669 		418 -0.2% 20.74 US$8,669
2026-03-05 2026-03-03 PlS Planned sale
2.9
Berard Todd

Chief Marketing Officer

Officer
353 -0.2%
20.74
US$7,321 		353 -0.2% 20.74 US$7,321
2026-03-05 2026-03-03 PlS Planned sale
4.0
Wichterman Troy

Chief Financial Officer

Officer
588 -0.3%
20.74
US$12,195 		588 -0.3% 20.74 US$12,195
2026-01-08 2026-01-06 PlS Planned sale
3.4
Mathew Aby J.

EVP & Chief Scientific Officer

Officer
405 -0.1%
25.59
US$10,364 		405 -0.1% 25.59 US$10,364
2026-01-08 2026-01-06 PlS Planned sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
335 -0.2%
25.59
US$8,573 		335 -0.2% 25.59 US$8,573
2026-01-08 2026-01-06 PlS Planned sale
4.0
Wichterman Troy

Chief Financial Officer

Officer
990 -0.7%
25.59
US$25,334 		990 -0.7% 25.59 US$25,334
2026-01-08 2026-01-06 PlS Planned sale
2.9
Berard Todd

Chief Marketing Officer

Officer
344 -0.3%
25.59
US$8,803 		344 -0.3% 25.59 US$8,803
2026-01-08 2026-01-06 PlS Planned sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
241 -0.3%
25.59
US$6,167 		241 -0.3% 25.59 US$6,167
2025-12-17 2025-12-15 S Sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
713 -0.9%
24.46
US$17,440 		713 -0.9% 24.46 US$17,440
2025-12-17 2025-12-15 S Sale
3.1
DuRoss Amy
Non-Executive Director
2,000 -9.7%
24.60
US$49,200 		2,000 -9.7% 24.60 US$49,200
2025-12-15 2025-12-15 PrS Proposed sale
3.6
SARAH AEBERSOLD

Officer

Officer
713
24.39
US$17,390 		713 24.39 US$17,390
2025-12-17 2025-12-09 PlS Planned sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
519 -0.3%
25.13
US$13,042 		519 -0.3% 25.13 US$13,042
2025-12-17 2025-12-09 PlS Planned sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
233 -0.3%
25.13
US$5,855 		233 -0.3% 25.13 US$5,855
2025-12-17 2025-12-09 PlS Planned sale
2.9
Berard Todd

Chief Marketing Officer

Officer
358 -0.3%
25.13
US$8,997 		358 -0.3% 25.13 US$8,997
2025-12-17 2025-12-09 PlS Planned sale
4.0
Wichterman Troy

Chief Financial Officer

Officer
1,033 -0.7%
25.13
US$25,959 		1,033 -0.7% 25.13 US$25,959
2025-12-17 2025-12-09 PlS Planned sale
3.4
Mathew Aby J.

EVP & Chief Scientific Officer

Officer
631 -0.2%
25.13
US$15,857 		631 -0.2% 25.13 US$15,857
2025-12-05 2025-12-04 S Sale
4.0
Wichterman Troy

Chief Financial Officer

Officer
30,000 -16.4%
25.72
US$771,600 		30,000 -16.4% 25.72 US$771,600
2025-12-04 2025-12-04 PrS Proposed sale
4.0
TROY WICHTERMAN

Officer

Officer
30,000
25.72
US$771,504 		30,000 25.72 US$771,504
2025-11-28 2025-11-26 S Sale
3.1
DuRoss Amy
Non-Executive Director
2,000 -8.8%
27.00
US$54,000 		2,000 -8.8% 27.00 US$54,000
2025-11-28 2025-11-25 PlS Planned sale
4.0
Wichterman Troy

Chief Financial Officer

Officer
584 -0.3%
26.74
US$15,616 		584 -0.3% 26.74 US$15,616
2025-11-28 2025-11-25 PlS Planned sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
415 -0.2%
26.74
US$11,097 		415 -0.2% 26.74 US$11,097
2025-11-28 2025-11-25 PlS Planned sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
217 -0.3%
26.74
US$5,803 		217 -0.3% 26.74 US$5,803
2025-11-28 2025-11-25 PlS Planned sale
Werner Sean

Chief Technology Officer

Officer
110 -0.4%
26.74
US$2,941 		110 -0.4% 26.74 US$2,941
2025-11-28 2025-11-25 PlS Planned sale
2.9
Berard Todd

Chief Marketing Officer

Officer
351 -0.3%
26.74
US$9,386 		351 -0.3% 26.74 US$9,386
2025-11-28 2025-11-25 S Sale
3.1
DuRoss Amy
Non-Executive Director
2,000 -8.1%
27.00
US$54,000 		2,000 -8.1% 27.00 US$54,000
2025-11-28 2025-11-25 PlS Planned sale
3.4
Mathew Aby J.

EVP & Chief Scientific Officer

Officer
526 -0.1%
26.74
US$14,065 		526 -0.1% 26.74 US$14,065
2025-11-21 2025-11-21 S Sale
3.1
DuRoss Amy
Non-Executive Director
1,000 -3.9%
26.00
US$26,000 		1,000 -3.9% 26.00 US$26,000
2025-11-21 2025-11-20 S Sale
3.1
DuRoss Amy
Non-Executive Director
4,523 -15.0%
24.51
US$110,859 		4,523 -15.0% 24.51 US$110,859
2025-11-21 2025-11-19 S Sale
3.1
DuRoss Amy
Non-Executive Director
477 -1.6%
24.50
US$11,686 		477 -1.6% 24.50 US$11,686
2025-11-13 2025-11-13 PrS Proposed sale
3.7
RODERICK DE GREEF

Officer

Officer
31,165
25.33
US$789,297 		31,165 25.33 US$789,297
2025-11-13 2025-11-13 S Sale
3.7
DE GREEF RODERICK

President and CEO

Executive Director
31,165 -7.4%
25.33
US$789,409 		31,165 -7.4% 25.33 US$789,409
2025-11-13 2025-11-12 S Sale
3.7
DE GREEF RODERICK

President and CEO

Executive Director
33,418 -7.4%
25.88
US$864,858 		33,418 -7.4% 25.88 US$864,858
2025-11-12 2025-11-12 PrS Proposed sale
3.1
DuRoss Amy

Director

Non-Executive Director
12,000
26.38
US$316,560 		12,000 26.38 US$316,560
2025-11-12 2025-11-12 PrS Proposed sale
3.7
RODERICK DE GREEF

Officer

Officer
33,418
25.88
US$864,995 		33,418 25.88 US$864,995
2025-11-13 2025-11-11 S Sale
3.7
DE GREEF RODERICK

President and CEO

Executive Director
35,417 -7.2%
26.15
US$926,155 		35,417 -7.2% 26.15 US$926,155
2025-11-12 2025-11-11 PrS Proposed sale
3.7
RODERICK DE GREEF

Officer

Officer
35,417
26.15
US$926,091 		35,417 26.15 US$926,091
2025-10-28 2025-10-24 PlS Planned sale
GOSWAMI JOYDEEP
Non-Executive Director
1,666 -3.6%
28.99
US$48,297 		1,666 -3.6% 28.99 US$48,297
2025-10-24 2025-10-22 PlS Planned sale
3.7
DE GREEF RODERICK

President and CEO

Executive Director
37,795 -7.2%
27.30
US$1,031,804 		37,795 -7.2% 27.30 US$1,031,804
2025-10-22 2025-10-22 PrS Proposed sale
3.7
DE GREEF RODERICK

Officer; Director

Executive Director
37,795
27.30
US$1,031,807 		37,795 27.30 US$1,031,807
2025-10-22 2025-10-20 PlS Planned sale
Werner Sean

Chief Technology Officer

Officer
275 -1.0%
27.82
US$7,650 		275 -1.0% 27.82 US$7,650
2025-10-16 2025-10-16 PrS Proposed sale
GOSWAMI JOYDEEP

Director

Non-Executive Director
9,000
30.99
US$278,910 		9,000 30.99 US$278,910
2025-10-17 2025-10-15 S Sale
3.3
Casdin Partners Master Fund, L.P.
Large shareholder
750,000 -11.2%
28.55
US$21,410,325 		750,000 -11.2% 28.55 US$21,410,325
2025-10-15 2025-10-15 PrS Proposed sale
3.3
Casdin Partners Master Fund, L.P.

10% Shareholder

Large shareholder
750,000
28.55
US$21,410,325 		750,000 28.55 US$21,410,325
2025-10-14 2025-10-09 PlS Planned sale
2.9
Berard Todd

Chief Marketing Officer

Officer
289 -0.2%
27.36
US$7,907 		289 -0.2% 27.36 US$7,907
2025-10-14 2025-10-09 PlS Planned sale
4.0
Wichterman Troy

Chief Financial Officer

Officer
833 -0.5%
27.36
US$22,791 		833 -0.5% 27.36 US$22,791
2025-10-14 2025-10-09 PlS Planned sale
3.4
Mathew Aby J.

EVP & Chief Scientific Officer

Officer
509 -0.1%
27.36
US$13,926 		509 -0.1% 27.36 US$13,926
2025-10-14 2025-10-09 PlS Planned sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
188 -0.2%
27.36
US$5,144 		188 -0.2% 27.36 US$5,144
2025-10-14 2025-10-09 PlS Planned sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
419 -0.2%
27.36
US$11,464 		419 -0.2% 27.36 US$11,464
2025-09-17 2025-09-15 PlS Planned sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
714 -0.9%
25.61
US$18,286 		714 -0.9% 25.61 US$18,286
2025-09-15 2025-09-15 PrS Proposed sale
3.6
SARAH AEBERSOLD

Officer

Officer
714
25.51
US$18,214 		714 25.51 US$18,214
2025-09-15 2025-09-11 PlS Planned sale
2.9
Berard Todd

Chief Marketing Officer

Officer
358 -0.3%
26.83
US$9,605 		358 -0.3% 26.83 US$9,605
2025-09-15 2025-09-11 PlS Planned sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
511 -0.3%
26.83
US$13,710 		511 -0.3% 26.83 US$13,710
2025-09-15 2025-09-11 PlS Planned sale
Werner Sean

Chief Technology Officer

Officer
72 -0.3%
26.83
US$1,932 		72 -0.3% 26.83 US$1,932
2025-09-15 2025-09-11 PlS Planned sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
233 -0.3%
26.83
US$6,251 		233 -0.3% 26.83 US$6,251
2025-09-15 2025-09-11 PlS Planned sale
4.0
Wichterman Troy

Chief Financial Officer

Officer
1,032 -0.6%
26.83
US$27,689 		1,032 -0.6% 26.83 US$27,689
2025-09-15 2025-09-11 PlS Planned sale
3.4
Mathew Aby J.

EVP & Chief Scientific Officer

Officer
630 -0.2%
26.83
US$16,903 		630 -0.2% 26.83 US$16,903
2025-08-28 2025-08-26 PlS Planned sale
3.6
Aebersold Sarah

Chief Human Resources Officer

Officer
219 -0.3%
25.44
US$5,571 		219 -0.3% 25.44 US$5,571
2025-08-28 2025-08-26 PlS Planned sale
2.9
Foster Karen A.

Chief Quality and Operations

Officer
413 -0.2%
25.44
US$10,507 		413 -0.2% 25.44 US$10,507
2025-08-28 2025-08-26 PlS Planned sale
3.4
Mathew Aby J.

EVP & Chief Scientific Officer

Officer
531 -0.2%
25.44
US$13,509 		531 -0.2% 25.44 US$13,509
2025-08-28 2025-08-26 PlS Planned sale
2.9
Berard Todd

Chief Marketing Officer

Officer
354 -0.3%
25.44
US$9,006 		354 -0.3% 25.44 US$9,006
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