Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Werewolf Therapeutics, Inc.

HOWL · Nasdaq · CIK 0001785530 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

52 Form 4 transaction lines observed in the same window
52 sales · 0 option, withholding, award, gift or other lines

Last qualifying purchase2025-05-14 · Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund II, L.P.; Shah Rajeev M. · $159.3K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
EVNIN LUKEDirector
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.TenPercentOwner
▼▼▼▼▼▼▼▼▼▼
● Purchase▼ Sale○ Other

—

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-05-14 · Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund II, L.P.; Shah Rajeev M..

Recent Form 4 activity

0Purchases
163Sales
0Other Form 4 lines
53SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING52 sale line(s) · context only
OTHER0 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
2,511,400
Previous report
1,705,956
Avg daily volume
679,291
Days to cover
3.7

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2025-05-14Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund II, L.P.; Shah Rajeev M.Purchase (P)Common Stock162,539USD 0.98USD 159,288SEC filing ↗
2025-05-13Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund II, L.P.; Shah Rajeev M.Purchase (P)Common Stock52,974USD 0.98USD 51,915SEC filing ↗
2025-05-12Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund II, L.P.; Shah Rajeev M.Purchase (P)Common Stock320,913USD 0.86USD 275,985SEC filing ↗
2023-01-06Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Purchase (P)Common Stock1,853,000USD 2.21USD 4,095,130SEC filing ↗
2021-06-16Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Purchase (P)Common Stock9,285USD 13.37USD 124,140SEC filing ↗
2021-06-15Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Purchase (P)Common Stock7,958USD 12.95USD 103,056SEC filing ↗
2021-06-14Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Purchase (P)Common Stock306,055USD 12.75USD 3,902,201SEC filing ↗
2021-05-04Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Purchase (P)Common Stock1,715,000USD 16.00USD 27,440,000SEC filing ↗
2021-05-04GADICKE ANSBERT; MPM ONCOLOGY INNOVATIONS FUND LP; MPM Oncology Impact Management GP LLC; MPM Oncology Impact Management LP; MPM Oncology Innovations Fund GP LLC; Oncology Impact Fund (Cayman) Management L.P.; UBS Oncology Impact Fund L.P.Purchase (P)Common Stock245,000USD 16.00USD 3,920,000SEC filing ↗
2021-05-04Foley Todd; MPM Asset Management Investors BV2014 LLC; MPM BioVentures 2014 (B), L.P.; MPM BioVentures 2014 GP LLC; MPM BioVentures 2014 LLC; MPM BioVentures 2014, L.P.Purchase (P)Common Stock125,759USD 16.00USD 2,012,144SEC filing ↗
2021-05-04EVNIN LUKEPurchase (P)Common Stock150,799USD 16.00USD 2,412,784SEC filing ↗
2021-05-04Taiho Ventures LLCPurchase (P)Common Stock312,500USD 16.00USD 5,000,000SEC filing ↗
2021-05-04SPHERA FUNDS MANAGEMENT LTD.; Sphera Global Healthcare GP Ltd.; Sphera Global Healthcare Management LPPurchase (P)Common Stock475,000USD 16.00USD 7,600,000SEC filing ↗
2021-05-04Longwood Fund III GP, LLC; Longwood Fund III, L.P.Purchase (P)Common Stock250,000USD 16.00USD 4,000,000SEC filing ↗
2021-05-04Lazarus AlonPurchase (P)Common Stock400,000USD 16.00USD 6,400,000SEC filing ↗

Form 4 evidence

163 transaction lines in the latest 365-day window; 216 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-07EVNIN LUKESale (S)Common Stock107,429USD 0.31USD 33,303SEC filing ↗
2026-07-06EVNIN LUKESale (S)Common Stock35,770USD 0.32USD 11,446SEC filing ↗
2026-06-29EVNIN LUKESale (S)Common Stock157,084USD 0.30USD 47,125SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-07EVNIN LUKESale (S)Common Stock107,429USD 0.31USD 33,303SEC filing ↗
2026-07-06EVNIN LUKESale (S)Common Stock35,770USD 0.32USD 11,446SEC filing ↗
2026-06-29EVNIN LUKESale (S)Common Stock157,084USD 0.30USD 47,125SEC filing ↗
2026-06-17Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock416,911USD 0.35USD 145,919SEC filing ↗
2026-06-16Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock149,625USD 0.37USD 55,361SEC filing ↗
2026-06-15Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock128,770USD 0.39USD 50,220SEC filing ↗
2026-06-12Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock170,441USD 0.40USD 68,176SEC filing ↗
2026-06-11Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock262,503USD 0.38USD 99,751SEC filing ↗
2026-06-10Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock45,923USD 0.37USD 16,992SEC filing ↗
2026-06-09Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock369,800USD 0.37USD 136,826SEC filing ↗
2026-06-09EVNIN LUKESale (S)Common Stock76,928USD 0.37USD 28,463SEC filing ↗
2026-06-08EVNIN LUKESale (S)Common Stock60,547USD 0.40USD 24,219SEC filing ↗
2026-06-05EVNIN LUKESale (S)Common Stock24,946USD 0.40USD 9,978SEC filing ↗
2026-06-04EVNIN LUKESale (S)Common Stock20,072USD 0.44USD 8,832SEC filing ↗
2026-06-03EVNIN LUKESale (S)Common Stock29,749USD 0.42USD 12,495SEC filing ↗
2026-06-02EVNIN LUKESale (S)Common Stock29,595USD 0.45USD 13,318SEC filing ↗
2026-06-01EVNIN LUKESale (S)Common Stock80,459USD 0.47USD 37,816SEC filing ↗
2026-05-29EVNIN LUKESale (S)Common Stock32,556USD 0.45USD 14,650SEC filing ↗
2026-05-28EVNIN LUKESale (S)Common Stock27,698USD 0.46USD 12,741SEC filing ↗
2026-05-27EVNIN LUKESale (S)Common Stock80,852USD 0.48USD 38,809SEC filing ↗
2026-05-26EVNIN LUKESale (S)Common Stock67,950USD 0.47USD 31,936SEC filing ↗
2026-05-22EVNIN LUKESale (S)Common Stock87,425USD 0.45USD 39,341SEC filing ↗
2026-05-21EVNIN LUKESale (S)Common Stock36,387USD 0.42USD 15,283SEC filing ↗
2026-05-20EVNIN LUKESale (S)Common Stock85,895USD 0.43USD 36,935SEC filing ↗
2026-05-19EVNIN LUKESale (S)Common Stock62,970USD 0.45USD 28,336SEC filing ↗
2026-05-18EVNIN LUKESale (S)Common Stock22,184USD 0.50USD 11,092SEC filing ↗
2026-05-13EVNIN LUKESale (S)Common Stock44,679USD 0.54USD 24,127SEC filing ↗
2026-05-12Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock101,151USD 0.64USD 64,737SEC filing ↗
2026-05-12EVNIN LUKESale (S)Common Stock67,885USD 0.64USD 43,446SEC filing ↗
2026-05-11Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; Shah Rajeev M.Sale (S)Common Stock87,490USD 0.67USD 58,618SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerHOWL
CIK0001785530
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history216 transaction lines from 2021-05-04 to 2026-07-07
19 P purchase lines · 168 S sale lines · 29 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.