MPM ASSET MANAGEMENT LLC
CIK 1263048 · last filed 2026-01-14
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$185.44M
Companies
3
Total Filings
26
Lifetime Open-Market Net
$56.16M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Recent Filings · Page 3 of 3
26 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-11-04 | HOWL | Notice (144) | −20,597 | -$27.0K | EDGAR |
| 2025-10-30 | HOWL | Notice (144) | −20,597 | -$32.1K | EDGAR |
| 2025-10-27 | HOWL | Notice (144) | −20,597 | -$36.5K | EDGAR |
| 2011-10-21 | — | Sell (S) | −3,678,536 | -$3.79M | |
| 2011-10-06 | — | Sell (S) | −3,041,856 | -$3.10M | |
| 2010-01-04 | EPIRUS Biopharmaceuticals, Inc. (CRXX) Delisted | Other (J) | −63,309,224 | $0 | EDGAR |
Showing 21–26 of 26
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Page 3 of 3
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.