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Werewolf Therapeutics, Inc.

HOWL Net buying

CIK 0001785530 #5027 in the set updated 20 Sep 2026

Bought (120 mo)

$91.70M

out of their own pocket, the only kind of buying there is

Sold (120 mo)

$8.72M

$7.70M on a plan · $9.21K straight out of an exercise

Sold at will

$1.00M

22 of 168 sales

Net

+$82.98M

+$90.69M against sales at will

By person

15 insiders · 190 transactions

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

RA CAPITAL MANAGEMENT, L.P. entity

10% owner

$36.15M (9)

$963.93K (20)

+$35.19M

4,595,600

9.46%

$1.42M

+19,512%

Flynn James E

10% owner

$12.80M (1)

—

+$12.80M

2,552,787

5.25%

$791.36K

—

Sphera Global Healthcare Management LP entity

10% owner

$7.60M (1)

—

+$7.60M

787,997

1.62%

$244.28K

—

Arkin Bio Ventures 2 L.P. entity

10% owner

$6.40M (1)

—

+$6.40M

2,046,634

4.21%

$634.46K

—

Lazarus Alon

Director

$6.40M (1)

—

+$6.40M

2,046,634

4.21%

$634.46K

—

Asanuma Sakae

Director

$5.00M (1)

—

+$5.00M

2,068,909

4.26%

$641.36K

—

Taiho Ventures LLC entity

10% owner

$5.00M (1)

—

+$5.00M

2,068,909

4.26%

$641.36K

—

Longwood Fund III GP, LLC entity

10% owner

$4.00M (1)

—

+$4.00M

1,677,082

3.45%

$519.90K

—

GADICKE ANSBERT

Former 10% Owner

$3.92M (1)

$2.23M (29) scheduled

+$1.69M

11,456,294

23.57%

$3.55M

+60.6%

EVNIN LUKE

Director

$2.41M (1)

$3.26M (88) scheduled

−$845.32K

4,284,172

8.82%

$1.33M

−9.7%

MPM BioVentures 2014, L.P.

Former 10% Owner

$2.01M (1)

$2.23M (29) scheduled

−$213.27K

7,972,109

16.40%

$2.47M

+19.0%

Leonard Reid

Chief Operating Officer

—

$40.24K (2)

−$40.24K

136,259

0.2804%

$42.24K

+8.9%

UPMC

10% owner

—

1,097,756

2.26%

$340.30K

—

HBM Healthcare Investments (Cayman) Ltd. entity

10% owner

—

625,995

1.29%

$194.06K

—

Seidel-Dugan Cynthia

Chief Scientific Officer

—

164,888

0.3393%

$51.12K

+31.7%

Individual transactions

Insider

Date

Role

Action

Price

Amount

Seidel-Dugan Cynthia

12 Jan 2022

Chief Scientific Officer

Exercised, kept

15,532

$4.77

$74.09K

Seidel-Dugan Cynthia

12 Jan 2022

Chief Scientific Officer

Exercised, kept

24,199

$1.56

$37.75K

Leonard Reid

30 Dec 2021

Chief Operating Officer

Exercised, kept

14,102

$1.56

$22.00K

Show all 190 transactions →

What was left out

Form 4 filings counted 144

Amendments (4/A) skipped 0

Filings about a different issuer 0

Unreadable filings 0

Joint filings 37

Sales on a Rule 10b5-1 plan 143

Sales straight out of an exercise 3

Sales at will 22

Transactions with no price 0

Shares from compensation/vesting 27,131,842

Sales filed before the plan box existed 2

History held since 3 May 2021