Biolife Solutions BLFS Insider Ownership

NASDAQ BLFS

$38.61 +0.00 (+0.00%)

At close: Oct 7, 2026 · 4:00 PM EDT

Insider Holdings by Owner

14.34Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

43.71%

▼-0.253% pp QoQ

Shares Held by Insiders

21.37Mn

filed for Sep 2026

▼-0.58% QoQ

Shares Outstanding

48.89Mn

48,889,090 shares

Direct Holdings

10.66Mn

Indirect: 10.71Mn

Net Shares Traded (QoQ)

-123.88K

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

In the last 12 months, insiders at Biolife Solutions made no open-market purchases, and sold at least $56.54 million of stock on the open market (2.24Mn shares).

Biolife Solutions' open-market sales in the past 12 months came from 10 insiders; no insider bought.
Casdin Partners Master Fund, L.P. (10% owner) led open-market sales of Biolife Solutions stock over the past 12 months with $49.54 million (1.95Mn shares), most recently on May 21, 2026.
Apart from open-market trades, BLFS insiders received 1.55Mn shares in stock awards and gave up 911.53K shares to cover taxes or exercise prices in the past 12 months.
Per Business Quant, BLFS insiders together hold 19.62Mn shares based on their latest Form 4 filings, or 40.14% of the 48.89Mn shares outstanding; that total is down 8.71% from 21.49Mn shares at the end of Q2 2026.
Direct holdings account for 8.91Mn shares (45.40%) of BLFS's insider total, and indirect holdings through trusts, partnerships and family members for 10.71Mn shares (54.60%).
Per Business Quant, 3 insiders of BLFS hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
BLFS's three largest insider shareholders, per their latest Form 4 filings, are Casdin Partners Master Fund, L.P. (10% owner, 19.42Mn shares), Karen A. Foster (Chief Quality and Operations, 108.76K shares) and Sarah Aebersold (Chief Human Resources Officer, 92.43K shares).
Casdin Partners Master Fund, L.P. alone accounts for 98.97% of the shares held by Biolife Solutions insiders.
Over the past 12 months, 14 insiders reported transactions in Biolife Solutions stock in 94 Form 4 filings.
The insider data for BLFS reflects Form 4 filings through October 8, 2026.

Form 4 Holdings

Insiders Holding BLFS

Insiders 8

Shares held 14.34Mn

Of outstanding 29.33%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Partners Master Fund, L.P. Casdin	TenPercentOwner	0	13,492,324	13,492,324	94.1%	21 May, 2026
2	Michael Rice	Chief Executive Officer	347,085	0	347,085	2.4%	01 Nov, 2023
3	Sarah Aebersold	Chief Human Resources Officer	124,870	0	124,870	0.9%	23 Mar, 2026
4	Garrie Richardson	Chief Revenue Officer	114,773	0	114,773	0.8%	18 Sep, 2024
5	Karen A. Foster	Chief Quality And Operations	108,758	0	108,758	0.8%	31 Mar, 2026
6	Geraint Phillips	Svp, Global Operations	65,998	0	65,998	0.5%	12 Mar, 2024
7	Joseph C Schick	Director	43,953	0	43,953	0.3%	12 Mar, 2024
8	Marcus Schulz	Chief Revenue Officer	42,097	0	42,097	0.3%	29 Aug, 2023

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

2,066 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
06 Oct, 2026	Joydeep Goswami	Director	Disposed D	53,156	—	—	0	Direct
06 Oct, 2026	Sean Werner	Chief Technology Officer	Acquired A	45,838	—	—	47,033	Direct
06 Oct, 2026	Greef Roderick De	Chief Executive Officer	Acquired A	225,670	—	—	567,186	Direct
06 Oct, 2026	Rachel Ellingson	Director	Disposed D	57,995	—	—	0	Direct
06 Oct, 2026	Todd Berard	Chief Marketing Officer	Acquired A	38,198	—	—	162,567	Direct
06 Oct, 2026	Amy Duross	Director	Disposed D	26,857	—	—	0	Direct
06 Oct, 2026	Troy Wichterman	Chief Financial Officer	Acquired A	76,204	—	—	216,881	Direct
06 Oct, 2026	Timothy L. Moore	Director	Disposed D	44,943	—	—	0	Direct
06 Oct, 2026	Anthony Hunt	Director	Disposed D	15,046	—	—	0	Direct
06 Oct, 2026	Aby J. Mathew	Evp Chief Scientific Officer	Acquired A	45,838	—	—	343,866	Direct
06 Oct, 2026	Catherine Coste	Director	Disposed D	13,871	—	—	0	Direct
06 Oct, 2026	Troy Wichterman	Chief Financial Officer	Acquired A	62,300	—	—	279,181	Direct
06 Oct, 2026	Aby J. Mathew	Evp Chief Scientific Officer	Acquired A	40,192	—	—	384,058	Direct
06 Oct, 2026	Greef Roderick De	Chief Executive Officer	Acquired A	237,460	—	—	804,646	Direct
06 Oct, 2026	Sean Werner	Chief Technology Officer	Acquired A	48,232	—	—	95,265	Direct
06 Oct, 2026	Todd Berard	Chief Marketing Officer	Acquired A	40,192	—	—	202,759	Direct
06 Oct, 2026	Greef Roderick De	Chief Executive Officer	Disposed F	364,872	$38.61	$14.09Mn	439,774	Direct
06 Oct, 2026	Aby J. Mathew	Evp Chief Scientific Officer	Disposed F	70,000	$38.61	$2.70Mn	314,058	Direct
06 Oct, 2026	Todd Berard	Chief Marketing Officer	Disposed F	46,170	$38.61	$1.78Mn	156,589	Direct
06 Oct, 2026	Troy Wichterman	Chief Financial Officer	Disposed F	95,933	$38.61	$3.70Mn	183,248	Direct

Showing 1 to 20 of 2,066 transactions