Greef Roderick De insider trades: Biolife Solutions (BLFS) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Greef reports to the SEC
Open-market buys and sales
63 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Nov 13, 2025 | BLFS | ↓ Sell | 100,000 | $25.80 | $2.6M | Direct | Nov 13, 2025 (0d) |
| Oct 22, 2025 | BLFS | ↓ Sell | 37,795 | $27.30 | $1.0M | Direct | Oct 24, 2025 (2d) |
| Oct 31, 2024 | BLFS | ↓ Sell | 46,896 | $23.43 | $1.1M | Direct | Jan 8, 2025 (69d) |
| Mar 12, 2024 | BLFS | ↓ Sell | 7,249 | $16.60 | $120K | Direct | Mar 12, 2024 (0d) |
| Jan 19, 2024 | BLFS | ↓ Sell | 2,642 | $16.76 | $44K | Direct | Jan 23, 2024 (4d) |
| Jan 19, 2023 | BLFS | ↓ Sell | 3,801 | $23.19 | $88K | Direct | Jan 20, 2023 (1d) |
| Nov 30, 2022 | BLFS | ↓ Sell | 45,405 | $20.69 | $940K | Direct | Nov 30, 2022 (0d) |
| Nov 23, 2022 | BLFS | ↓ Sell | 14,000 | $21.66 | $303K | Direct | Nov 23, 2022 (0d) |
| Nov 18, 2022 | BLFS | ↓ Sell | 3,000 | $22.67 | $68K | Direct | Nov 18, 2022 (0d) |
| Nov 14, 2022 | BLFS | ↓ Sell | 20,000 | $23.86 | $477K | Direct | Nov 15, 2022 (1d) |
| Oct 7, 2022 | BLFS | ↓ Sell | 8,552 | $22.69 | $194K | Direct | Oct 11, 2022 (4d) |
| Oct 3, 2022 | BLFS | ↓ Sell | 1,233 | $21.95 | $27K | Direct | Oct 4, 2022 (1d) |
| Jul 12, 2022 | BLFS | ↓ Sell | 9,158 | $15.79 | $145K | Direct | Jul 14, 2022 (2d) |
| Apr 18, 2022 | BLFS | ↓ Sell | 18,530 | $17.59 | $326K | Direct | Apr 19, 2022 (1d) |
| Apr 7, 2022 | BLFS | ↓ Sell | 10,713 | $21.82 | $234K | Direct | Apr 11, 2022 (4d) |
| Jan 7, 2022 | BLFS | ↓ Sell | 10,816 | $30.75 | $333K | Direct | Jan 11, 2022 (4d) |
| Dec 29, 2021 | BLFS | ↓ Sell | 705 | $39.37 | $28K | Direct | Dec 30, 2021 (1d) |
| Nov 18, 2021 | BLFS | ↓ Sell | 21,000 | $51.07 | $1.1M | Direct | Nov 18, 2021 (0d) |
| Oct 25, 2021 | BLFS | ↓ Sell | 2,371 | $44.62 | $106K | Direct | Oct 27, 2021 (2d) |
| Oct 14, 2021 | BLFS | ↓ Sell | 1,221 | $39.97 | $49K | Direct | Oct 18, 2021 (4d) |
| Sep 28, 2021 | BLFS | ↓ Sell | 689 | $43.12 | $30K | Direct | Sep 30, 2021 (2d) |
| Aug 19, 2021 | BLFS | ↓ Sell | 46,239 | $44.84 | $2.1M | Direct | Aug 19, 2021 (0d) |
| Jun 29, 2021 | BLFS | ↓ Sell | 685 | $43.75 | $30K | Direct | Jul 1, 2021 (2d) |
| Apr 15, 2021 | BLFS | ↓ Sell | 20,919 | $34.45 | $721K | Direct | Apr 15, 2021 (0d) |
| Apr 1, 2021 | BLFS | ↓ Sell | 3,855 | $36.53 | $141K | Direct | Apr 5, 2021 (4d) |
| Mar 26, 2021 | BLFS | ↓ Sell | 2,893 | $35.01 | $101K | Direct | Mar 30, 2021 (4d) |
| Mar 25, 2021 | BLFS | ↓ Sell | 30,000 | $39.91 | $1.2M | Direct | Mar 25, 2021 (0d) |
| Feb 19, 2021 | BLFS | ↓ Sell | 13,453 | $40.99 | $551K | Direct | Feb 19, 2021 (0d) |
| Nov 16, 2020 | BLFS | ↓ Sell | 30,000 | $31.77 | $953K | Direct | Nov 16, 2020 (0d) |
| Sep 29, 2020 | BLFS | ↓ Sell | 1,781 | $28.63 | $51K | Direct | Oct 1, 2020 (2d) |
| Mar 6, 2020 | BLFS | ↓ Sell | 30,000 | $13.81 | $414K | Direct | Mar 6, 2020 (0d) |
| Feb 7, 2020 | BLFS | ↓ Sell | 30,000 | $13.94 | $418K | Direct | Feb 7, 2020 (0d) |
| Jan 8, 2020 | BLFS | ↓ Sell | 30,000 | $15.84 | $475K | Direct | Jan 8, 2020 (0d) |
| Dec 6, 2019 | BLFS | ↓ Sell | 30,000 | $16.14 | $484K | Direct | Dec 6, 2019 (0d) |
| Nov 8, 2019 | BLFS | ↓ Sell | 30,000 | $17.11 | $513K | Direct | Nov 8, 2019 (0d) |
| Oct 4, 2019 | BLFS | ↓ Sell | 30,000 | $15.71 | $471K | Direct | Oct 4, 2019 (0d) |
| Sep 6, 2019 | BLFS | ↓ Sell | 30,000 | $19.78 | $593K | Direct | Sep 6, 2019 (0d) |
| Aug 2, 2019 | BLFS | ↓ Sell | 30,000 | $18.96 | $569K | Direct | Aug 2, 2019 (0d) |
| Jul 3, 2019 | BLFS | ↓ Sell | 30,000 | $16.72 | $502K | Direct | Jul 3, 2019 (0d) |
| Jun 19, 2019 | BLFS | ↓ Sell | 10,000 | $17.60 | $176K | Direct | Jun 21, 2019 (2d) |
| May 29, 2019 | BLFS | ↓ Sell | 25,000 | $9.53 | $238K | Direct | May 29, 2018 (0d) |
| May 23, 2019 | BLFS | ↓ Sell | 14,500 | $17.88 | $259K | Direct | May 24, 2019 (1d) |
| May 16, 2019 | BLFS | ↓ Sell | 10,000 | $16.76 | $168K | Direct | May 17, 2019 (1d) |
| Apr 17, 2019 | BLFS | ↓ Sell | 10,000 | $16.53 | $165K | Direct | Apr 19, 2019 (2d) |
| Mar 20, 2019 | BLFS | ↓ Sell | 10,000 | $19.83 | $198K | Direct | Mar 22, 2019 (2d) |
| Feb 20, 2019 | BLFS | ↓ Sell | 10,000 | $17.23 | $172K | Direct | Feb 22, 2019 (2d) |
| Jan 17, 2019 | BLFS | ↓ Sell | 10,000 | $12.49 | $125K | Direct | Jan 17, 2019 (0d) |
| Dec 19, 2018 | BLFS | ↓ Sell | 10,000 | $10.67 | $107K | Direct | Dec 21, 2018 (2d) |
| Oct 21, 2018 | BLFS | ↓ Sell | 10,000 | $10.00 | $100K | Direct | Nov 23, 2018 (33d) |
| Oct 17, 2018 | BLFS | ↓ Sell | 10,000 | $12.95 | $130K | Direct | Oct 19, 2018 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other BLFS insiders
Open-market trades in the last 12 months
About Greef Roderick De's insider trades
Greef Roderick De is Chief Executive Officer at Biolife Solutions (BLFS). Since Nov 21, 2006, Greef has reported 1 open-market purchase worth $30K and 62 sales worth $24.8M on SEC Form 4. In the last 12 months: 1 sale ($2.6M).
Their filings also include grants and awards (48 filings), option exercises (41 filings), shares withheld for taxes (5 filings), other transactions (4 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every BLFS insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.