144 ·Filed Apr 27, 2026
Actionable Insight ▼ Bearish
Monitor for further insider selling and upcoming catalysts. The coordination among multiple MPM funds may indicate a strategic exit; watch for any material news that could explain the timing.
Final — all horizons settled through T+60d ⚠ clustered
HOWL ▼ -51.32% at T+60d
SHORT call ✓ call won +51.32% · α vs SPY +55.31% · entry $0.7400 → $0.3602
T+1d
-6.65%
call +6.65% · α +6.64%
$0.6908
settled 6mo ago
T+5d
-6.76%
call +6.76% · α +8.45%
$0.6900
settled 6mo ago
T+20d
-37.43%
call +37.43% · α +42.90%
$0.4630
settled 5mo ago
T+60d
-51.32%
call +51.32% · α +55.31%
$0.3602
settled 3mo ago
Price Chart
Loading chart...
Executive Summary
Four MPM-affiliated funds filed Form 144 notices to sell an aggregate of 274,913 shares of Werewolf Therapeutics (HOWL), valued at approximately $223,500. The coordinated insider selling by venture backers signals reduced confidence, despite the modest size relative to the $40M market cap.
Key Facts
- Total shares proposed for sale: 274,913 across four filings
- Total approximate value: $223,504 (0.56% of market cap)
- Filers: MPM Oncology Innovations Fund, MPM BioVentures 2014, MPM BioVentures 2014 (B), and UBS Oncology Impact Fund
- All shares were acquired in a private placement on 2021-05-04
- Filed on 2026-04-27 with proposed sale date of same day
Financial Impact
~$223,500 aggregate sales value
dilutioninsider ownership
Risk Factors
- Continued selling pressure from venture backers
- Negative sentiment signal around management and outlook
Market Snapshot
Exchange
Nasdaq
Sector
Pharmaceutical Preparations
Investment Themes
Documents Analyzed
This report is based on 12 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (HOWL) — Batch item 1 | 0001628280-26-027594 |
| Document: 0001628280-26-027594-index.html | 0001628280-26-027595 |
| Document: 0001628280-26-027594.txt | 0001628280-26-027597 |
| 144 Filing (HOWL) — Batch item 4 | 0001628280-26-027595 |
| Document: 0001628280-26-027595-index.html | 0001628280-26-027594 |
| Document: 0001628280-26-027595.txt | 0001628280-26-027594 |
| 144 Filing (HOWL) — Batch item 7 | 0001628280-26-027597 |
| Document: 0001628280-26-027597-index.html | 0001628280-26-027594 |
| Document: 0001628280-26-027597.txt | 0001628280-26-027594 |
| 144 Filing (HOWL) — Batch item 10 | 0001628280-26-027598 |
| Document: 0001628280-26-027598-index.html | 0001628280-26-027594 |
| Document: 0001628280-26-027598.txt | 0001628280-26-027594 |
25 reports for HOWL
79% Hit rate @ T+5 Went positive at some point 12 of 14 best @ T+20▲ +43.82%
Filters
Rows
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 26, 2026 today | S-4/A | $0.9806 | awaiting T+5 | — | $1.04 (−6.06%) |
Sep 22, 2026 5w ago | S-4 | $0.9894 $0.9223 | ▲ +6.78% | ▲ +6.11% | $1.04 (−5.11%) |
Sep 21, 2026 5w ago | SC 13G | $0.9800 $0.9300 | ▼ −5.10% | ▼ −4.08% | $1.04 (+6.12%) |
Aug 21, 2026 9w ago | 425 | $0.8740 $0.9433 | ▲ +7.93% | ▲ +7.46% | $1.04 (+18.99%) |
Aug 21, 2026 9w ago | 8-K | $0.8740 $0.9433 | ▲ +7.93% | ▲ +7.46% | $1.04 (+18.99%) |
Aug 21, 2026 9w ago | Press Release | $0.8740 $0.9433 | ▼ −7.93% | ▼ −7.46% | $1.04 (−18.99%) |
Jul 31, 2026 12w ago | 8-K | $0.3531 $0.3971 | ▲ +12.46% | ▲ +8.95% | $1.04 (+194.53%) |
Jul 31, 2026 12w ago | Press Release | $0.3531 $0.3971 | ▲ +12.46% | ▲ +8.95% | $1.04 (+194.53%) |
Jun 29, 2026 17w ago | 144 | $0.3599 $0.3200 | ▲ +11.09% | ▲ +11.69% | $1.04 (−188.97%) |
Jun 29, 2026 17w ago | 144 | $0.3599 $0.3200 | ▲ +11.09% | ▲ +11.69% | $1.04 (−188.97%) |
Showing 10 of 25
US Market Status
Market Closed — Opens Wed (16h 24m)
Subscribe to SecBot
Get Real-Time SEC Filing Intelligence
Comprehensive SEC filing analysis delivered the moment filings hit EDGAR. Sentiment scoring, impact analysis, and actionable insights for every material event.
Create a free account Live analysis, Telegram alerts, watchlists and the MCP server for subscribers