Company Analysis

Werewolf Therapeutics, Inc. (HOWL)

Nasdaq: HOWL · Pharmaceutical Preparations · Watertown, MA · filing with the SEC since 2019
Grade4.6
◀ Past 4.7● Present 3.7▶ Future 5.4
6 est.

Filings

169 filings since 2017 beside 286 insider forms · Non-accelerated filer and smaller reporting company and emerging growth company · read from EDGAR on Nov 13, 2026
Due nextNon-accelerated filer and smaller reporting company and emerging growth company
10-Q Quarterly report for the quarter ending Sep 30, 2026Non-accelerated filers and smaller reporting companies have 45 days after the quarter ends; quarter ends are taken to the month end. by Nov 14, 2026
10-K Annual report for the fiscal year ending Dec 31, 2026Non-accelerated filers and smaller reporting companies have 90 days after the fiscal year ends. by Mar 31, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 31 days after the quarter ended. The proxy statement was last filed Apr 28, 2025.

Filings a yearinsider forms included
1184383746142106
20192020202120222023202420252026

2026 counts to Nov 13, 2026.

Officer or director change (8-K item 5.02): 4 times in the last 36 months, the newest Feb 13, 2026.Listing warning from its exchange (8-K item 3.01): 3 times in the last 36 months, the newest Feb 6, 2026.SEC letters: 2 in the last 36 months, the newest May 13, 2025.
Insider forms 286

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Nov 12, 2026 EFFECT Registration effective
Nov 12, 2026 424B3 Shelf offering
Nov 10, 2026 S-4/A Merger or exchange registration, amended
Nov 10, 2026 425 Merger communication
Nov 9, 2026 8-K items 7.01, 9.01 Investor disclosure (Regulation FD) · Current report
Oct 26, 2026 S-4/A Merger or exchange registration, amended
Sep 22, 2026 S-4 Merger or exchange registration
Sep 21, 2026 SCHEDULE 13G Large holder notice
Aug 21, 2026 425 Merger communication
Aug 21, 2026 8-K items 1.01, 3.02, 7.01, 9.01 Major agreement signed; Shares sold without registration; Investor disclosure (Regulation FD) · Current report
Aug 20, 2026 8-K item 1.01 Major agreement signed · Current report Aug 14, 2026
Jul 31, 2026 10-Q Quarterly report Jun 30, 2026
Jul 31, 2026 8-K items 2.02, 9.01 Results released · Current report
Jul 2, 2026 SCHEDULE 13D/A Activist holder update, amended
Jun 26, 2026 SCHEDULE 13D/A Activist holder update, amended
Jun 22, 2026 SCHEDULE 13D/A Activist holder update, amended
Jun 15, 2026 SCHEDULE 13D/A Activist holder update, amended
May 14, 2026 SCHEDULE 13D/A Activist holder update, amended
May 12, 2026 SCHEDULE 13D/A Activist holder update, amended
May 7, 2026 10-Q Quarterly report Mar 31, 2026
May 7, 2026 8-K items 2.02, 9.01 Results released · Current report
May 5, 2026 SCHEDULE 13D/A Activist holder update, amended
Mar 27, 2026 10-K Annual report Dec 31, 2025
Mar 27, 2026 8-K items 2.02, 9.01 Results released · Current report
Feb 24, 2026 8-K items 8.01, 9.01 Other event · Current report
Feb 13, 2026 8-K items 2.05, 5.02, 7.01 Exit or restructuring costs; Officer or director change; Investor disclosure (Regulation FD) · Current report Feb 9, 2026
Feb 11, 2026 SCHEDULE 13G/A Large holder update, amended
Feb 6, 2026 8-K item 3.01 Listing warning from its exchange · Current report Feb 4, 2026
Jan 16, 2026 SCHEDULE 13D/A Activist holder update, amended
Dec 29, 2025 SCHEDULE 13D/A Activist holder update, amended
Dec 18, 2025 8-K items 8.01, 9.01 Other event · Current report
Dec 3, 2025 SCHEDULE 13D/A Activist holder update, amended
Nov 17, 2025 SCHEDULE 13D/A Activist holder update, amended
Nov 6, 2025 SCHEDULE 13D/A Activist holder update, amended
Nov 4, 2025 10-Q Quarterly report Sep 30, 2025
Nov 4, 2025 8-K items 2.02, 9.01 Results released · Current report
Nov 4, 2025 SCHEDULE 13D/A Activist holder update, amended
Oct 6, 2025 8-K item 3.01 Listing warning from its exchange · Current report Oct 2, 2025
Aug 14, 2025 10-Q Quarterly report Jun 30, 2025
Aug 14, 2025 8-K items 2.02, 7.01, 9.01 Results released; Investor disclosure (Regulation FD) · Current report
40 of 169 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton HOWL · research, not advice