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HOWL · Werewolf Therapeutics, Inc.

−1.7% on Oct 16

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Updated Oct 17 · 10 feeds behind: Big-holder filings, 4 days, and 9 more · Every feed →

On this page

The market view

Price chart

The interactive HOWL chart (by TradingView) loads here.

Our take

5 rules fired on HOWL

In short: none of these rules has solid or some evidence yet, so they show no clear lean on HOWL.

How each did in past tests, against similar stocks over 3 months. Past results don't predict future ones.

All 5 rules
The 0–100 score for HOWL, and which of these rules are open on it right now
Members see one number for how strongly these rules agree on HOWL, and the day each rule fired. Better-tested rules count more, and so do different kinds of filings that point the same way.
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Compare with this company’s history

Is disclosure activity unusual?

See how many different insiders or members of Congress reported purchases or sales of HOWL. Each bar covers 28 days, by disclosure date. Several trades by one person count once in each group and period.

Latest period: Sep 25, 2026–Oct 22, 2026 · UTC dates · today is excluded

Insider purchases

Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual.

Latest 28 days
0
Earlier median
0
Earlier range
0–0
Distinct filers per 28 daysScale: 0–1
Oct 24, 2025Oct 22, 2026
Earlier periodsLatest 28 daysEarlier median 0Limited or missing history

Who appears in the latest period?

No named filers on file for this period.

Up to three filers; one example disclosure each.

Inspect this period’s filings

The history behind this view

First stored company disclosure: Jun 10, 2026. Newest disclosure across this feed: Oct 16, 2026.

Earlier periods in the comparison: 3. Outlined periods are missing data, so they are left out of the comparison. The chart scale changes with the category.

Exact counts, dates and filings for all four categories
Insider purchases · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 0; range: 0–0.

Insider purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 24, 2025–Nov 20, 2025—Unavailable
Nov 21, 2025–Dec 18, 2025—Unavailable
Dec 19, 2025–Jan 15, 2026—Unavailable
Jan 16, 2026–Feb 12, 2026—Unavailable
Feb 13, 2026–Mar 12, 2026—Unavailable
Mar 13, 2026–Apr 9, 2026—Unavailable
Apr 10, 2026–May 7, 2026—Unavailable
May 8, 2026–Jun 4, 2026—Unavailable
Jun 5, 2026–Jul 2, 20260Partial; excluded
Jul 3, 2026–Jul 30, 20260Within stored history
Jul 31, 2026–Aug 27, 20260Within stored history
Aug 28, 2026–Sep 24, 20260Within stored history
Sep 25, 2026–Oct 22, 2026Latest period0Within stored history
Insider sales · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 0; range: 0–1.

Insider sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 24, 2025–Nov 20, 2025—Unavailable
Nov 21, 2025–Dec 18, 2025—Unavailable
Dec 19, 2025–Jan 15, 2026—Unavailable
Jan 16, 2026–Feb 12, 2026—Unavailable
Feb 13, 2026–Mar 12, 2026—Unavailable
Mar 13, 2026–Apr 9, 2026—Unavailable
Apr 10, 2026–May 7, 2026—Unavailable
May 8, 2026–Jun 4, 2026—Unavailable
Jun 5, 2026–Jul 2, 20265Partial; excluded
Jul 3, 2026–Jul 30, 20261Within stored history
Jul 31, 2026–Aug 27, 20260Within stored history
Aug 28, 2026–Sep 24, 20260Within stored history
Sep 25, 2026–Oct 22, 2026Latest period0Within stored history
Congress purchases · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 24, 2025–Nov 20, 2025—Unavailable
Nov 21, 2025–Dec 18, 2025—Unavailable
Dec 19, 2025–Jan 15, 2026—Unavailable
Jan 16, 2026–Feb 12, 2026—Unavailable
Feb 13, 2026–Mar 12, 2026—Unavailable
Mar 13, 2026–Apr 9, 2026—Unavailable
Apr 10, 2026–May 7, 2026—Unavailable
May 8, 2026–Jun 4, 2026—Unavailable
Jun 5, 2026–Jul 2, 2026—Unavailable
Jul 3, 2026–Jul 30, 2026—Unavailable
Jul 31, 2026–Aug 27, 2026—Unavailable
Aug 28, 2026–Sep 24, 2026—Unavailable
Sep 25, 2026–Oct 22, 2026Latest period—Unavailable
Congress sales · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 24, 2025–Nov 20, 2025—Unavailable
Nov 21, 2025–Dec 18, 2025—Unavailable
Dec 19, 2025–Jan 15, 2026—Unavailable
Jan 16, 2026–Feb 12, 2026—Unavailable
Feb 13, 2026–Mar 12, 2026—Unavailable
Mar 13, 2026–Apr 9, 2026—Unavailable
Apr 10, 2026–May 7, 2026—Unavailable
May 8, 2026–Jun 4, 2026—Unavailable
Jun 5, 2026–Jul 2, 2026—Unavailable
Jul 3, 2026–Jul 30, 2026—Unavailable
Jul 31, 2026–Aug 27, 2026—Unavailable
Aug 28, 2026–Sep 24, 2026—Unavailable
Sep 25, 2026–Oct 22, 2026Latest period—Unavailable
How to read this comparison

The median is the middle count in up to 12 earlier, non-overlapping 28-day periods; the range runs from the smallest to the largest count. The latest period is excluded from both. A comparison needs at least 6 earlier periods, including 3 with activity. The feed’s latest disclosure must be within 7 days of the current period’s end. This freshness check does not verify complete collection.

Insiders include individuals and reporting entities; only purchase and sale codes enter this view. Congress counts reporting members, including their disclosed family transactions. The same filer can appear in purchases and sales, so these categories should not be added into a net count.

These are stored disclosures, not a complete measure of trading. Reporting delays and collection gaps can change the comparison. More activity does not identify a motive or predict a stock’s return.

Company timeline

What has been happening?

May 1, 2026–Oct 16, 2026. Select a month in a category to inspect its records.

Company filings

Insiders

Owners & lobbying

Owners & lobbying · Sep 2026

  1. Filed
All 42 records in this snapshot
  1. Filed
  2. Filed
  3. Record date
  4. Record date
  5. Filed
  6. Filed
  7. Filed
  8. Filed
  9. Disclosed
    Luke Evnin · Sale

    Transaction dated Jul 7, 2026

  10. Disclosed
    Luke Evnin · Sale

    Transaction dated Jul 6, 2026

  11. Filed
  12. Filed
  13. Filed
  14. Filed
  15. Filed
  16. Filed
  17. Disclosed
    Luke Evnin · Sale

    Transaction dated Jun 29, 2026

  18. Filed
  19. Disclosed
    Peter Kolchinsky · Sale

    Transaction dated Jun 17, 2026

  20. Disclosed
    Peter Kolchinsky · Sale

    Transaction dated Jun 17, 2026

  21. Disclosed
    RA Capital Healthcare Fund LP · Sale

    Transaction dated Jun 17, 2026

  22. Disclosed
    RA Capital Healthcare Fund LP · Sale

    Transaction dated Jun 17, 2026

  23. Filed
  24. Disclosed
    Ra Capital Management, L.P. · Sale

    Transaction dated Jun 17, 2026

  25. Disclosed
    Ra Capital Management, L.P. · Sale

    Transaction dated Jun 17, 2026

  26. Disclosed
    Rajeev M. Shah · Sale

    Transaction dated Jun 17, 2026

  27. Disclosed
    Rajeev M. Shah · Sale

    Transaction dated Jun 17, 2026

  28. Disclosed
    Peter Kolchinsky · Sale

    Transaction dated Jun 12, 2026

  29. Disclosed
    Peter Kolchinsky · Sale

    Transaction dated Jun 16, 2026

  30. Disclosed
    Peter Kolchinsky · Sale

    Transaction dated Jun 12, 2026

  31. Disclosed
    RA Capital Healthcare Fund LP · Sale

    Transaction dated Jun 16, 2026

  32. Disclosed
    Ra Capital Management, L.P. · Sale

    Transaction dated Jun 15, 2026

  33. Disclosed
    Ra Capital Management, L.P. · Sale

    Transaction dated Jun 12, 2026

  34. Disclosed
    Ra Capital Management, L.P. · Sale

    Transaction dated Jun 12, 2026

  35. Disclosed
    Ra Capital Management, L.P. · Sale

    Transaction dated Jun 16, 2026

  36. Disclosed
    Rajeev M. Shah · Sale

    Transaction dated Jun 15, 2026

  37. Disclosed
    Rajeev M. Shah · Sale

    Transaction dated Jun 16, 2026

  38. Disclosed
    Rajeev M. Shah · Sale

    Transaction dated Jun 12, 2026

  39. Disclosed
    Rajeev M. Shah · Sale

    Transaction dated Jun 12, 2026

  40. Disclosed
    Rajeev M. Shah · Sale

    Transaction dated Jun 15, 2026

  41. Disclosed
    Rajeev M. Shah · Sale

    Transaction dated Jun 16, 2026

  42. Filed

Month counts include every record on file. The lists show the newest records on this page. A dash means none on file that month. Trades use disclosure dates; contract dates follow the source record. Nearby events do not establish the cause of a price move.

Who's buying and selling · last 90 days

Congress

No Congress trades on HOWL disclosed in the last 90 days.

See every Congress trade on HOWL →

Company insiders

No insider buys or sells of HOWL filed in the last 90 days.

See every insider trade on HOWL →

Big holders (Schedule 13D / 13G): 1 filing in the last 90 days · newest: Moll Peter (13G), Sep 21, 2026 ↗

Filings & events

Company filings (8-K) 57

Events the company must report to the SEC within days — results, deals, departures, restatements.

What it files 8-Ks about

  • Quarterly or yearly results · item 2.029
  • Shared information with investors · item 7.018
  • Other events · item 8.016
  • Directors or officers joined, left or got new pay · item 5.023
  • Shareholder vote results · item 5.073
  • Signed a major agreement · item 1.012

Filing red flags 11

Warning signs in the company's own SEC filings — going-concern doubts, control weaknesses, staff comment letters, late filings, restatements, Wells notices, clinical holds, dividend cuts.

Planned insider sales (Form 144) 114

Notices insiders file before they sell certain shares, such as ones they got straight from the company.

None in the last 90 days · 114 notices on file

The notices on file don't give the sale's size; each sale shows up under company insiders once it is reported.

5% owners (13D / 13G) 15

Investors who reported owning 5% or more — 13D for owners who may push for changes, 13G for owners who just hold.

Push for changes, or just hold?

  • 13D, may push for changes: 14 filings
  • 13G, just holds: 1 filing

Filed most: Ra Capital Management, L.P. (7) · MPM BioVentures 2014, L.P. (7) · Moll Peter (1)

Biggest named funds (13F)

The largest HOWL holdings among the well-known funds whose quarterly 13F filings we read — opens here.

Every disclosed trade on HOWL

  1. ▼ SELLLuke Evnin DirectorHOWL Werewolf Therapeutics, Inc.$33.3Kdisclosed Jul 8 · filed 1 day after the trade
  2. ▼ SELLLuke Evnin DirectorHOWL Werewolf Therapeutics, Inc.$11.4Kdisclosed Jul 8 · filed 2 days after the trade
  3. ▼ SELLLuke Evnin DirectorHOWL Werewolf Therapeutics, Inc.$47.1Kdisclosed Jun 29 · filed the same day
  4. ▼ SELLRajeev M. Shah 10% ownerHOWL Werewolf Therapeutics, Inc.$136Kdisclosed Jun 22 · filed 5 days after the trade · late
  5. ▼ SELLRa Capital Management, L.P. 10% ownerHOWL Werewolf Therapeutics, Inc.$136Kdisclosed Jun 22 · filed 5 days after the trade · late
  6. ▼ SELLRajeev M. Shah 10% ownerHOWL Werewolf Therapeutics, Inc.$9.7Kdisclosed Jun 22 · filed 5 days after the trade · late
  7. ▼ SELLRA Capital Healthcare Fund LP 10% ownerHOWL Werewolf Therapeutics, Inc.$136Kdisclosed Jun 22 · filed 5 days after the trade · late
  8. ▼ SELLRa Capital Management, L.P. 10% ownerHOWL Werewolf Therapeutics, Inc.$9.7Kdisclosed Jun 22 · filed 5 days after the trade · late
  9. ▼ SELLPeter Kolchinsky 10% ownerHOWL Werewolf Therapeutics, Inc.$136Kdisclosed Jun 22 · filed 5 days after the trade · late
  10. ▼ SELLPeter Kolchinsky 10% ownerHOWL Werewolf Therapeutics, Inc.$9.7Kdisclosed Jun 22 · filed 5 days after the trade · late
  11. ▼ SELLRA Capital Healthcare Fund LP 10% ownerHOWL Werewolf Therapeutics, Inc.$9.7Kdisclosed Jun 22 · filed 5 days after the trade · late
  12. ▼ SELLRa Capital Management, L.P. 10% ownerHOWL Werewolf Therapeutics, Inc.$3.3Kdisclosed Jun 16 · filed 1 day after the trade
  13. ▼ SELLRajeev M. Shah 10% ownerHOWL Werewolf Therapeutics, Inc.$46.9Kdisclosed Jun 16 · filed 1 day after the trade
  14. ▼ SELLRajeev M. Shah 10% ownerHOWL Werewolf Therapeutics, Inc.$51.7Kdisclosed Jun 16 · filed the same day
  15. ▼ SELLPeter Kolchinsky 10% ownerHOWL Werewolf Therapeutics, Inc.$63.6Kdisclosed Jun 16 · filed 4 days after the trade
  16. ▼ SELLRajeev M. Shah 10% ownerHOWL Werewolf Therapeutics, Inc.$4.5Kdisclosed Jun 16 · filed 4 days after the trade
  17. ▼ SELLRa Capital Management, L.P. 10% ownerHOWL Werewolf Therapeutics, Inc.$63.6Kdisclosed Jun 16 · filed 4 days after the trade
  18. ▼ SELLPeter Kolchinsky 10% ownerHOWL Werewolf Therapeutics, Inc.$3.7Kdisclosed Jun 16 · filed the same day
  19. ▼ SELLPeter Kolchinsky 10% ownerHOWL Werewolf Therapeutics, Inc.$4.5Kdisclosed Jun 16 · filed 4 days after the trade
  20. ▼ SELLRA Capital Healthcare Fund LP 10% ownerHOWL Werewolf Therapeutics, Inc.$3.7Kdisclosed Jun 16 · filed the same day
  21. ▼ SELLRajeev M. Shah 10% ownerHOWL Werewolf Therapeutics, Inc.$63.6Kdisclosed Jun 16 · filed 4 days after the trade
  22. ▼ SELLRajeev M. Shah 10% ownerHOWL Werewolf Therapeutics, Inc.$3.3Kdisclosed Jun 16 · filed 1 day after the trade
  23. ▼ SELLRa Capital Management, L.P. 10% ownerHOWL Werewolf Therapeutics, Inc.$4.5Kdisclosed Jun 16 · filed 4 days after the trade
  24. ▼ SELLRa Capital Management, L.P. 10% ownerHOWL Werewolf Therapeutics, Inc.$51.7Kdisclosed Jun 16 · filed the same day
  25. ▼ SELLRajeev M. Shah 10% ownerHOWL Werewolf Therapeutics, Inc.$3.7Kdisclosed Jun 16 · filed the same day
See all 60 trades on HOWL →
People & votes

Which members of Congress traded HOWL, sponsored bills that touch it and voted on them — opens here.