Insider trading

Period: 120 months Stock: BLFS Plan: Discretionary × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

43 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

43 decisions over 120 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

43 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

43 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
43 decisions over 120 months Remove this filter
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
43 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

43 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
21 May 2026
Casdin Partners Master Fund, L.P. 10% owner · indirect
Sold at will
$15.41M 650,000 at 23.70
12.0%
Not planned
20 May 2026
Casdin Partners Master Fund, L.P. 10% owner · indirect
Sold at will
$5.93M 250,000 at 23.70
4.4%
Not planned
19 May 2026
Casdin Partners Master Fund, L.P. 10% owner · indirect
Sold at will
$6.80M 300,000 at 22.65
5.0%
Not planned
9 Mar 2026
Foster Karen A. Chief Quality and Operations
Sold at will
$10.00K 500 at 20.00
0.4%
Not planned
5 Mar 2026
Foster Karen A. Chief Quality and Operations
Sold at will
$1.95M 96,923 at 20.15
46.0%
Not planned
15 Dec 2025
DuRoss Amy Director
Sold at will
$49.20K 2,000 at 24.60
9.7%
Not planned
4 Dec 2025
Wichterman Troy Chief Financial Officer
Sold at will
$771.60K 30,000 at 25.72
16.4%
Not planned
26 Nov 2025
DuRoss Amy Director
Sold at will
$54.00K 2,000 at 27.00
8.8%
Not planned
25 Nov 2025
DuRoss Amy Director
Sold at will
$54.00K 2,000 at 27.00
8.1%
Not planned
21 Nov 2025
DuRoss Amy Director
Sold at will
$26.00K 1,000 at 26.00
3.9%
Not planned
20 Nov 2025
DuRoss Amy Director
Sold at will
$110.86K 4,523 at 24.51
15.0%
Not planned
19 Nov 2025
DuRoss Amy Director
Sold at will
$11.69K 477 at 24.50
1.6%
Not planned
13 Nov 2025
DE GREEF RODERICK President and CEO
Sold at will
$789.41K 31,165 at 25.33
7.4%
Not planned
12 Nov 2025
DE GREEF RODERICK President and CEO
Sold at will
$864.86K 33,418 at 25.88
7.4%
Not planned
11 Nov 2025
DE GREEF RODERICK President and CEO
Sold at will
$926.15K 35,417 at 26.15
7.2%
Not planned
15 Oct 2025
Casdin Partners Master Fund, L.P. 10% owner · indirect
Sold at will
$21.41M 750,000 at 28.55
11.2%
Not planned
25 Aug 2025
Berard Todd Chief Marketing Officer
Sold at will
$255.30K 10,000 at 25.53
7.4%
Not planned
15 Aug 2025
Casdin Partners Master Fund, L.P. 10% owner · indirect
Sold at will
$12.20M 500,000 at 24.40
6.9%
Not planned
11 Aug 2025
Casdin Partners Master Fund, L.P. 10% owner · indirect
Sold at will
$11.30M 500,000 at 22.60
6.5%
Not planned
10 Jun 2025
Casdin Partners Master Fund, L.P. 10% owner · indirect
Sold at will
$23.80M 1,000,000 at 23.80
11.5%
Not planned
13 Mar 2024
DuRoss Amy Director
Sold at will
$86.11K 5,065 at 17.00
14.7%
Not planned
12 Mar 2024
DuRoss Amy Director
Sold at will
$103.44K 6,135 at 16.86
15.1%
Not planned
19 Oct 2023
Bought
$10.37M 927,165 at 11.19
12.2%
9 Aug 2023
Bought
$771.74K 58,465 at 13.20
0.8%
22 May 2023
Casdin Partners Master Fund, L.P. 10% owner · indirect
Bought
$545.79K 24,973 at 21.86
20.0%
19 May 2023
Casdin Partners Master Fund, L.P. 10% owner · indirect
Bought
$1.13M 50,000 at 22.55
66.6%
+67% of stake
18 May 2023
Casdin Partners Master Fund, L.P. 10% owner · indirect
Bought
$652.69K 30,000 at 21.76
66.6%
+67% of stake
17 May 2023
Casdin Partners Master Fund, L.P. 10% owner · indirect
Bought
$639.45K 30,027 at 21.30
200%
+200% of stake
16 May 2023
Casdin Partners Master Fund, L.P. 10% owner · indirect
Bought
$302.84K 15,000 at 20.19
opened
6 Apr 2023
Sold at will
$64.38K 3,214 at 20.03
0.7%
Not planned
6 Apr 2023
Mathew Aby J. EVP & Chief Scientific Officer
Sold at will
$41.92K 2,093 at 20.03
0.8%
Not planned
6 Apr 2023
Berard Todd Chief Marketing Officer
Sold at will
$30.95K 1,545 at 20.03
1.3%
Not planned
6 Apr 2023
Foster Karen A. Chief Quality Officer
Sold at will
$22.05K 1,101 at 20.03
0.9%
Not planned
6 Apr 2023
Schulz Marcus Chief Revenue Officer
Sold at will
$15.44K 771 at 20.03
1.8%
Not planned
6 Apr 2023
Aebersold Sarah Chief Human Resources Officer
Sold at will
$14.80K 739 at 20.03
1.7%
Not planned
29 Mar 2023
Sold at will
$19.30K 936 at 20.62
0.2%
Not planned
29 Mar 2023
Mathew Aby J. EVP & Chief Scientific Officer
Sold at will
$15.28K 741 at 20.62
0.3%
Not planned
29 Mar 2023
Berard Todd Chief Marketing Officer
Sold at will
$10.74K 521 at 20.62
0.4%
Not planned
29 Mar 2023
Foster Karen A. Chief Quality Officer
Sold at will
$8.04K 390 at 20.62
0.3%
Not planned
23 Mar 2023
Mathew Aby J. EVP & Chief Scientific Officer
Sold at will
$217.90K 10,000 at 21.79
3.6%
Not planned
22 Mar 2023
Mathew Aby J. EVP & Chief Scientific Officer
Sold at will
$214.40K 10,000 at 21.44
3.6%
Not planned
22 Mar 2023
Wichterman Troy Chief Financial Officer
Sold at will
$6.77K 310 at 21.84
0.5%
Not planned
20 Mar 2023
Wichterman Troy Chief Financial Officer
Sold at will
$206.40K 10,000 at 20.64
12.8%
Not planned
Showing 1–43 of 43.