Casdin Partners Master Fund, L.P.
10% owner
SaleAlert
- Shares
- 650,000
- Price
- $23.70
- Value
- $15,405,000
SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•110 filings
BLFS
BIOLIFE SOLUTIONS INC
No net buying or selling imbalance over the last 3 months
No net buyers or sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.
How to read this signal
Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.
3-month balance
$0.00
0 buyers · 0 sellers
12-month purchases
$0.00
0 distinct insiders
12-month sales
$33,812,607
9 distinct insiders
Highlighted alerts
19
5 Rule 10b5-1 trades treated as informational
Buying cluster · 30 days
Fewer than three distinct buyers
CEO/CFO purchases · 12 months
No executive purchases found
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Form 4 raw → Raspberry
The value is in what we do not call a signal.
The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.
100
Raw transactions
Everything returned by the filing
24
Voluntary view
P/S trades after deterministic checks
81
Administrative noise
Stored, never alerted
13
10b5-1
Shown as informational
SEC ownership XML facts
- Code
- S
- Shares
- 111
- Price
- $20.74
- Footnotes
- 1
The sale reported herein was made pursuant to a Rule 10b5-1 (c) trading plan adopted by the reporting person effective as of 02-24-2022 to satisfy tax withholding obligations in connection with the vesting of shares of restricted stock.
Raspberry interpretation
Informational — no alert
Reason: tax_withholding. The filing footnotes identify tax withholding. The trade is reported under a Rule 10b5-1 plan.
Recent transactions
Voluntary purchases and sales; administrative noise stays hidden.
Casdin Partners Master Fund, L.P.
10% owner
SaleAlert
- Shares
- 250,000
- Price
- $23.70
- Value
- $5,925,000
Casdin Partners Master Fund, L.P.
10% owner
SaleAlert
- Shares
- 300,000
- Price
- $22.65
- Value
- $6,795,000
Foster Karen A.
Chief Quality and Operations
Sale 10b5-1
- Shares
- 2,577
- Price
- $19.17
- Value
- $49,401
Foster Karen A.
Chief Quality and Operations
SaleAlert
- Shares
- 500
- Price
- $20.00
- Value
- $10,000
Foster Karen A.
Chief Quality and Operations
SaleAlert
- Shares
- 96,923
- Price
- $20.15
- Value
- $1,952,998
Aebersold Sarah
Chief Human Resources Officer
Sale 10b5-1
- Shares
- 713
- Price
- $24.46
- Value
- $17,440
DuRoss Amy
Director
SaleAlert
- Shares
- 2,000
- Price
- $24.60
- Value
- $49,200
Wichterman Troy
Chief Financial Officer
SaleAlert
- Shares
- 30,000
- Price
- $25.72
- Value
- $771,600
DuRoss Amy
Director
SaleAlert
- Shares
- 2,000
- Price
- $27.00
- Value
- $54,000
DuRoss Amy
Director
SaleAlert
- Shares
- 2,000
- Price
- $27.00
- Value
- $54,000
DuRoss Amy
Director
SaleAlert
- Shares
- 1,000
- Price
- $26.00
- Value
- $26,000
DuRoss Amy
Director
SaleAlert
- Shares
- 4,523
- Price
- $24.51
- Value
- $110,859
DuRoss Amy
Director
SaleAlert
- Shares
- 477
- Price
- $24.50
- Value
- $11,687
DE GREEF RODERICK
President and CEO
SaleAlert
- Shares
- 31,165
- Price
- $25.33
- Value
- $789,409
DE GREEF RODERICK
President and CEO
SaleAlert
- Shares
- 33,418
- Price
- $25.88
- Value
- $864,858
DE GREEF RODERICK
President and CEO
SaleAlert
- Shares
- 35,417
- Price
- $26.15
- Value
- $926,155
GOSWAMI JOYDEEP
Director
Sale 10b5-1
- Shares
- 1,666
- Price
- $28.99
- Value
- $48,297
GOSWAMI JOYDEEP
Director
Sale 10b5-1
- Shares
- 1,334
- Price
- —
- Value
- —
Casdin Partners Master Fund, L.P.
10% owner
SaleAlert
- Shares
- 750,000
- Price
- $28.55
- Value
- $21,410,325
Aebersold Sarah
Chief Human Resources Officer
Sale 10b5-1
- Shares
- 714
- Price
- $25.61
- Value
- $18,286
Berard Todd
Chief Marketing Officer
SaleAlert
- Shares
- 10,000
- Price
- $25.53
- Value
- $255,300
Casdin Partners Master Fund, L.P.
10% owner
SaleAlert
- Shares
- 500,000
- Price
- $24.40
- Value
- $12,200,000
Casdin Partners Master Fund, L.P.
10% owner
SaleAlert
- Shares
- 500,000
- Price
- $22.60
- Value
- $11,300,000
| Date | Insider | Transaction | Shares | Price | Value | Reading |
|---|---|---|---|---|---|---|
| May 21, 2026 | Casdin Partners Master Fund, L.P. 10% owner | Sale | 650,000 | $23.70 | $15,405,000 | |
| May 20, 2026 | Casdin Partners Master Fund, L.P. 10% owner | Sale | 250,000 | $23.70 | $5,925,000 | |
| May 19, 2026 | Casdin Partners Master Fund, L.P. 10% owner | Sale | 300,000 | $22.65 | $6,795,000 | |
| Mar 23, 2026 | Foster Karen A. Chief Quality and Operations | Sale | 2,577 | $19.17 | $49,401 | |
| Mar 09, 2026 | Foster Karen A. Chief Quality and Operations | Sale | 500 | $20.00 | $10,000 | |
| Mar 05, 2026 | Foster Karen A. Chief Quality and Operations | Sale | 96,923 | $20.15 | $1,952,998 | |
| Dec 15, 2025 | Aebersold Sarah Chief Human Resources Officer | Sale | 713 | $24.46 | $17,440 | |
| Dec 15, 2025 | DuRoss Amy Director | Sale | 2,000 | $24.60 | $49,200 | |
| Dec 04, 2025 | Wichterman Troy Chief Financial Officer | Sale | 30,000 | $25.72 | $771,600 | |
| Nov 26, 2025 | DuRoss Amy Director | Sale | 2,000 | $27.00 | $54,000 | |
| Nov 25, 2025 | DuRoss Amy Director | Sale | 2,000 | $27.00 | $54,000 | |
| Nov 21, 2025 | DuRoss Amy Director | Sale | 1,000 | $26.00 | $26,000 | |
| Nov 20, 2025 | DuRoss Amy Director | Sale | 4,523 | $24.51 | $110,859 | |
| Nov 19, 2025 | DuRoss Amy Director | Sale | 477 | $24.50 | $11,687 | |
| Nov 13, 2025 | DE GREEF RODERICK President and CEO | Sale | 31,165 | $25.33 | $789,409 | |
| Nov 12, 2025 | DE GREEF RODERICK President and CEO | Sale | 33,418 | $25.88 | $864,858 | |
| Nov 11, 2025 | DE GREEF RODERICK President and CEO | Sale | 35,417 | $26.15 | $926,155 | |
| Oct 24, 2025 | GOSWAMI JOYDEEP Director | Sale | 1,666 | $28.99 | $48,297 | |
| Oct 16, 2025 | GOSWAMI JOYDEEP Director | Sale | 1,334 | — | — | |
| Oct 15, 2025 | Casdin Partners Master Fund, L.P. 10% owner | Sale | 750,000 | $28.55 | $21,410,325 | |
| Sep 15, 2025 | Aebersold Sarah Chief Human Resources Officer | Sale | 714 | $25.61 | $18,286 | |
| Aug 25, 2025 | Berard Todd Chief Marketing Officer | Sale | 10,000 | $25.53 | $255,300 | |
| Aug 15, 2025 | Casdin Partners Master Fund, L.P. 10% owner | Sale | 500,000 | $24.40 | $12,200,000 | |
| Aug 11, 2025 | Casdin Partners Master Fund, L.P. 10% owner | Sale | 500,000 | $22.60 | $11,300,000 |
“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.