Werewolf Therapeutics
HOWL on Nasdaq. Market value $45m.
Should I look at this?
Look carefully before going further
Why it could be worth it
Nothing stands out yet.
What to watch out for
Read the warning sign in its own filings
This is not advice.
Who owns it
None of the long-term investors we follow own it. 45 funds in all.
Largest holders overall
- RA Capital Management, L.P.$859,349Cut
- Balyasny Asset Management L.P.$644,253New
- Vanguard Capital Management$438,471
- Renaissance Technologies$242,800Added
- Lynx1 Capital Management LP$236,737
- Sphera Funds Management$225,589
- DC Funds, LP$212,018
- Verdad Advisers, LP$125,500Added
- Geode Capital Management$120,895Cut
- Bank of America$111,829Added
From 13F filings for the quarter ended 30 June 2026.
Big holders and activists
4 investors own more than 5%.
- MOLL PETERPassive investor5.2%Since 18 September 2026
- at least 4.1%−1.9 pts(filed with 3 related holders)Since 30 June 2026
- ANSBERT GADICKEPassive investorat least 3.8%−1.6 pts(filed with 13 related holders)Since 8 May 2026
- Longwood Fund III GP, LLCPassive investorat least 3.5%(filed with 1 related holder)Since 31 December 2025
- PFM Health Sciences, LPPassive investorSold down below 5%Since 30 June 2025
| Holder | Stake | Since | |
|---|---|---|---|
MOLL PETER Passive investor | 5.2% | 18 September 2026 | |
at least 4.1%−1.9 pts (filed with 3 related holders) | 30 June 2026 | ||
ANSBERT GADICKE Passive investor | at least 3.8%−1.6 pts (filed with 13 related holders) | 8 May 2026 | |
Longwood Fund III GP, LLC Passive investor | at least 3.5% (filed with 1 related holder) | 31 December 2025 | |
PFM Health Sciences, LP Passive investor | Sold down below 5% | 30 June 2025 |
From Schedule 13D and 13G filings: anyone owning more than 5% must file one.
What insiders did
No insider bought shares on the open market in the last 12 months. 1 sold $3m, $3m of it under preset trading plans.
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 7 July 2026
- Shares
- 107,429
- Price
- $0.31
- Value
- $33,303
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 6 July 2026
- Shares
- 35,770
- Price
- $0.32
- Value
- $11,446
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 29 June 2026
- Shares
- 157,084
- Price
- $0.30
- Value
- $47,125
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 9 June 2026
- Shares
- 76,928
- Price
- $0.37
- Value
- $28,463
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 8 June 2026
- Shares
- 60,547
- Price
- $0.40
- Value
- $24,219
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 5 June 2026
- Shares
- 24,946
- Price
- $0.40
- Value
- $9,978
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 4 June 2026
- Shares
- 20,072
- Price
- $0.44
- Value
- $8,832
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 3 June 2026
- Shares
- 29,749
- Price
- $0.42
- Value
- $12,495
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 2 June 2026
- Shares
- 29,595
- Price
- $0.45
- Value
- $13,318
- EVNIN LUKEDirectorSoldunder a preset trading plan
- Date
- 1 June 2026
- Shares
- 80,459
- Price
- $0.47
- Value
- $37,816
| Date | Who | Did | Shares | Price | Value |
|---|---|---|---|---|---|
| 7 July 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 107,429 | $0.31 | $33,303 |
| 6 July 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 35,770 | $0.32 | $11,446 |
| 29 June 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 157,084 | $0.30 | $47,125 |
| 9 June 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 76,928 | $0.37 | $28,463 |
| 8 June 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 60,547 | $0.40 | $24,219 |
| 5 June 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 24,946 | $0.40 | $9,978 |
| 4 June 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 20,072 | $0.44 | $8,832 |
| 3 June 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 29,749 | $0.42 | $12,495 |
| 2 June 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 29,595 | $0.45 | $13,318 |
| 1 June 2026 | EVNIN LUKE Director | Sold under a preset trading plan | 80,459 | $0.47 | $37,816 |
From Form 4 filings: insiders must report trades in their own company's shares within two days.
Warning signs in its filings
Problems the company itself reported to the SEC, in its own words.
1 serious warning sign in Werewolf Therapeutics’ filings.
We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.
We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 27 Mar 2026, plus the 10-Q filed 31 Jul 2026 and 4 later 8-Ks.
Doubt it can keep going
SeriousThe company or its auditor warned it may not have enough money to last the next year.
“These conditions raise substantial doubt about our ability to continue as a going concern for at least twelve months from the date these condensed consolidated financial statements are issued in this Quarterly Report.”
Show the full paragraph
We had cash and cash equivalents of $ 22.0 million at June 30, 2026. The outcome of our strategic review process will inform future development plans and the costs associated with those efforts. We expect to incur substantial operating losses and negative cash flows from operations for the foreseeable future as we continue to execute on our strategic review process. Our ability to maintain ongoing operations is dependent on our ability to obtain additional financing, as to which we can make no assurance. These conditions raise substantial doubt about our ability to continue as a going concern for at least twelve months from the date these condensed consolidated financial statements are issued in this Quarterly Report. There can be no assurance that the strategic review process will result in any agreement or transaction that will mitigate the conditions which raise substantial doubt about our ability to continue as a going concern, or at all.
From the 10-Q filed 31 July 2026, Part I, Item 1. Financial Statements. Read it in the filing
A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.
The deep dive
Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.
- What the business is worth, as a range, and the margin of safety at today’s price
- Prices to start buying, buy, and buy hard
- The three things that would make this a mistake
- Every number footnoted to the filing it came from
Your first deep dive is free.
Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.