MPM ASSET MANAGEMENT LLC
CIK 1263048 · last filed 2026-01-14
MPM ASSET MANAGEMENT LLC is a corporate insider who has filed 7 SEC Form 4 insider transactions across 3 companies since 2010. The most recent filing, for AKTS, was dated Jan 14, 2026. Across all open-market trades the lifetime net is +$56.2M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $161.6M across reported positions.
"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.
$161.62M
3
7
$56.16M
Holdings By Company
Recent Filings
7 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-01-14 | AKTS | Mixed | +29,755,065 | $60.09M | EDGAR |
| 2025-12-04 | HOWL | Sell (S) | −1,398,124 | -$1.28M | EDGAR |
| 2025-12-01 | HOWL | Sell (S) | −993,489 | -$958.0K | EDGAR |
| 2025-11-12 | HOWL | Sell (S) | −1,494,703 | -$1.69M | 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 |