Insider trading

Period: 120 months Stock: HOWL Minimum amount: $100K × + Add filter Clear all
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When

Period

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

38 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.

38 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.

38 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.

38 decisions over 120 months Remove this filter
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.
38 decisions over 120 months
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
38 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.

38 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
17 Jun 2026
RA CAPITAL MANAGEMENT, L.P. 10% owner · indirect
Sold at will 2×
$145.92K 416,911 at 0.35
57.9%
Sold half or more
9 Jun 2026
RA CAPITAL MANAGEMENT, L.P. 10% owner · indirect
Sold at will 2×
$136.83K 369,800 at 0.37
49.2%
Not planned
8 May 2026
RA CAPITAL MANAGEMENT, L.P. 10% owner · indirect
Sold at will 2×
$267.33K 376,526 at 0.71
47.3%
Not planned
8 May 2026
EVNIN LUKE Director · indirect
Sold on a plan
$214.02K 305,741 at 0.70
19.4%
Planned (10b5-1)
30 Apr 2026
EVNIN LUKE Director · indirect
Sold on a plan
$121.15K 168,262 at 0.72
8.6%
Planned (10b5-1)
4 Nov 2025
GADICKE ANSBERT 10% owner · indirect
Sold on a plan
$171.40K 140,488 at 1.22
2.3%
Planned (10b5-1)
4 Nov 2025
MPM BioVentures 2014, L.P. 10% owner · indirect
Sold on a plan
$171.40K 140,488 at 1.22
2.3%
Planned (10b5-1)
4 Nov 2025
EVNIN LUKE Director · indirect
Sold on a plan
$110.00K 90,164 at 1.22
2.3%
Planned (10b5-1)
3 Nov 2025
GADICKE ANSBERT 10% owner · indirect
Sold on a plan
$121.34K 94,063 at 1.29
1.5%
Planned (10b5-1)
3 Nov 2025
MPM BioVentures 2014, L.P. 10% owner · indirect
Sold on a plan
$121.34K 94,063 at 1.29
1.5%
Planned (10b5-1)
31 Oct 2025
GADICKE ANSBERT 10% owner · indirect
Sold on a plan
$145.98K 114,044 at 1.28
1.8%
Planned (10b5-1)
31 Oct 2025
MPM BioVentures 2014, L.P. 10% owner · indirect
Sold on a plan
$145.98K 114,044 at 1.28
1.8%
Planned (10b5-1)
30 Oct 2025
GADICKE ANSBERT 10% owner · indirect
Sold on a plan
$124.32K 86,936 at 1.43
1.3%
Planned (10b5-1)
30 Oct 2025
MPM BioVentures 2014, L.P. 10% owner · indirect
Sold on a plan
$124.32K 86,936 at 1.43
1.3%
Planned (10b5-1)
29 Oct 2025
GADICKE ANSBERT 10% owner · indirect
Sold on a plan
$208.07K 134,240 at 1.55
2.0%
Planned (10b5-1)
29 Oct 2025
MPM BioVentures 2014, L.P. 10% owner · indirect
Sold on a plan
$208.07K 134,240 at 1.55
2.0%
Planned (10b5-1)
29 Oct 2025
EVNIN LUKE Director · indirect
Sold on a plan
$133.54K 86,154 at 1.55
2.0%
Planned (10b5-1)
28 Oct 2025
MPM BioVentures 2014, L.P. 10% owner · indirect
Sold on a plan
$113.27K 69,068 at 1.64
1.0%
Planned (10b5-1)
28 Oct 2025
GADICKE ANSBERT 10% owner · indirect
Sold on a plan
$113.27K 69,068 at 1.64
1.0%
Planned (10b5-1)
27 Oct 2025
GADICKE ANSBERT 10% owner · indirect
Sold on a plan
$125.06K 72,709 at 1.72
1.1%
Planned (10b5-1)
27 Oct 2025
MPM BioVentures 2014, L.P. 10% owner · indirect
Sold on a plan
$125.06K 72,709 at 1.72
1.1%
Planned (10b5-1)
14 May 2025
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought
$159.29K 162,539 at 0.98
2.7%
12 May 2025
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought
$275.99K 320,913 at 0.86
5.6%
6 Jan 2023
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought
$4.10M 1,853,000 at 2.21
48.2%
+48% of stake
16 Jun 2021
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought
$124.14K 9,285 at 13.37
0.2%
15 Jun 2021
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought
$103.06K 7,958 at 12.95
0.2%
14 Jun 2021
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought
$3.90M 306,055 at 12.75
7.7%
4 May 2021
RA CAPITAL MANAGEMENT, L.P. Director · indirect
Bought 2×
$27.44M 1,715,000 at 16.00
94.8%
First buy on file
4 May 2021
Flynn James E 10% owner · indirect
Bought
$12.80M 800,000 at 16.00
45.6%
First buy on file
4 May 2021
Bought
$7.60M 475,000 at 16.00
152%
First buy on file
4 May 2021
Lazarus Alon Director · indirect
Bought
$6.40M 400,000 at 16.00
24.3%
First buy on file
4 May 2021
Arkin Bio Ventures 2 L.P. 10% owner · indirect
Bought
$6.40M 400,000 at 16.00
24.3%
First buy on file
4 May 2021
Asanuma Sakae Director · indirect
Bought
$5.00M 312,500 at 16.00
17.8%
First buy on file
4 May 2021
Taiho Ventures LLC 10% owner
Bought
$5.00M 312,500 at 16.00
17.8%
First buy on file
4 May 2021
Longwood Fund III GP, LLC 10% owner · indirect
Bought
$4.00M 250,000 at 16.00
17.5%
First buy on file
4 May 2021
GADICKE ANSBERT 10% owner · indirect
Bought
$3.92M 245,000 at 16.00
3.8%
First buy on file
4 May 2021
EVNIN LUKE Director · indirect
Bought
$2.41M 150,799 at 16.00
3.6%
First buy on file
4 May 2021
MPM BioVentures 2014, L.P. 10% owner · indirect
Bought
$2.01M 125,759 at 16.00
4.1%
First buy on file
Showing 1–38 of 38.