BLFS
BIOLIFE SOLUTIONS INC · Healthcare · Market cap $1.7B
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$56.7M
reported sales (SEC code S)
Unique Insiders
10
in the rolling window
Latest filing
Sep 10, 2026
Casdin Partners Master Fund, L.P.
BIOLIFE SOLUTIONS INC (BLFS) has 84 SEC Form 4 filings (105 transaction rows) in the rolling window, disclosed by 10 distinct insiders. Most recent filing: Sep 10, 2026.
Inside the rolling window, 10 insiders at BIOLIFE SOLUTIONS INC reported no open-market purchases and 55 open-market sales totaling $56.7M. The most active filer is Chief Quality and Operations Foster Karen A. with 9 filings. Insiders have net sold $28.2M over the trailing 6 months. The most recent open-market filing is a sale of 300,000 shares by 10% Owner Casdin Partners Master Fund, L.P., dated May 19, 2026, worth $6.8M.
- Industry:Medical - Instruments & Supplies
- CEO:Roderick de Greef
- Employees:155
- HQ:Bothell, WA, US
- IPO:1989-11-22
| Source | |||||||
|---|---|---|---|---|---|---|---|
Casdin Partners Master Fund, L.P.First in 6 months | 10% Owner | Sale | 300,000 | $6.8M | May 21 | +41.1% | SEC ↗ |
Casdin Partners Master Fund, L.P.First in 6 months | 10% Owner | Sale | 250,000 | $5.9M | May 21 | +41.1% | SEC ↗ |
Casdin Partners Master Fund, L.P.First in 6 months | 10% Owner | Sale | 650,000 | $15.4M | May 21 | +41.1% | SEC ↗ |
| Chief Quality and Operations | Sale | 2,577 | $49K | Mar 31 | +83.0% | SEC ↗ | |
| Chief Quality and Operations | Sale | 96,923 | $2.0M | Mar 9 | +75.5% | SEC ↗ | |
| Chief Quality and Operations | Sale | 500 | $10K | Mar 9 | +75.5% | SEC ↗ | |
| Chief Quality and Operations | Sale | 418 | $9K | Mar 5 | +73.6% | SEC ↗ | |
Werner SeanFirst in 3 months | Chief Technology Officer | Sale | 111 | $2K | Mar 5 | +73.6% | SEC ↗ |
| Chief Human Resources Officer | Sale | 219 | $5K | Mar 5 | +73.6% | SEC ↗ | |
| Chief Financial Officer | Sale | 588 | $12K | Mar 5 | +73.6% | SEC ↗ | |
| EVP & Chief Scientific Officer | Sale | 529 | $11K | Mar 5 | — | SEC ↗ | |
| Chief Marketing Officer | Sale | 353 | $7K | Mar 5 | — | SEC ↗ | |
| Chief Human Resources Officer | Sale | 241 | $6K | Jan 8 | — | SEC ↗ | |
| Chief Financial Officer | Sale | 990 | $25K | Jan 8 | — | SEC ↗ | |
| EVP & Chief Scientific Officer | Sale | 405 | $10K | Jan 8 | — | SEC ↗ | |
| Chief Marketing Officer | Sale | 344 | $9K | Jan 8 | — | SEC ↗ | |
| Chief Quality and Operations | Sale | 335 | $9K | Jan 8 | — | SEC ↗ | |
| Chief Human Resources Officer | Sale | 233 | $6K | Dec 17 | — | SEC ↗ | |
| Chief Human Resources Officer | Sale | 713 | $17K | Dec 17 | — | SEC ↗ | |
| Director | Sale | 2,000 | $49K | Dec 17 | — | SEC ↗ | |
| Chief Marketing Officer | Sale | 358 | $9K | Dec 17 | — | SEC ↗ | |
| Chief Financial Officer | Sale | 1,033 | $26K | Dec 17 | — | SEC ↗ | |
| Chief Quality and Operations | Sale | 519 | $13K | Dec 17 | — | SEC ↗ | |
| EVP & Chief Scientific Officer | Sale | 631 | $16K | Dec 17 | — | SEC ↗ | |
| Chief Financial Officer | Sale | 30,000 | $772K | Dec 5 | — | SEC ↗ |
Congress trading BLFS 2 all-time
- RRep. Chris JacobsOther$1,001 - $15,0002022-12-12
- RRep. Chris JacobsPurchase$1,001 - $15,0002022-11-08
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does BLFS have?
BIOLIFE SOLUTIONS INC (BLFS) has 84 SEC Form 4 filings (105 transaction rows) in the rolling 365-day window, disclosed by 10 distinct insiders. Most recent filing: Sep 10, 2026.
When was the most recent SEC Form 4 filing for BLFS?
The most recent Form 4 filing for BLFS on Tracefour is dated Sep 10, 2026.
Who is the most active insider at BLFS?
The most active SEC Form 4 filer at BLFS in the rolling window is Chief Quality and Operations Foster Karen A., with 9 filings.
What is the net insider flow at BLFS over the last 6 months?
Over the trailing 180 days, insiders at BLFS have net sold $28.2M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at BLFS in the current window?
Inside the rolling window, insiders at BLFS bought $0 and sold $56.7M based on SEC Form 4 filings.
Can I get alerts for BLFS insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at BIOLIFE SOLUTIONS INC (BLFS). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
BIOLIFE SOLUTIONS INC is in the Healthcare sector.