MPM BioVentures 2014, L.P.
CIK 1609492 · last filed 2025-12-04
MPM BioVentures 2014, L.P. is a corporate insider who has filed 3 SEC Form 4 insider transactions across 3 companies since 2019. The most recent filing shows the insider sold $916.4K of HOWL on Dec 4, 2025. Across all open-market trades the lifetime net is +$114.3M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $1.9M 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.
$1.85M
3
3
$114.28M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| HOWL | 4,867,341 | $0.38 | $1.85M | -$916.4K | 1 | 2025-12-04 | |
| iTeos Therapeutics, Inc. (ITOS) Delisted | 10%+ Owner | 69,951 | $10.15 | $710.0K | $30.40M | 1 | 2020-07-29 |
| TCR2 THERAPEUTICS INC. (TCRR) Delisted | 10%+ Owner | 3,021,298 | $1.48 | $4.47M | $84.80M | 1 | 2019-02-21 |
Recent Filings
3 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-12-04 | HOWL | Sell (S) | −998,660 | -$916.4K | EDGAR |
| 2020-07-29 | iTeos Therapeutics, Inc. (ITOS) Delisted | Mixed | +37,066,630 | $30.40M | EDGAR |
| 2019-02-21 | TCR2 THERAPEUTICS INC. (TCRR) Delisted | Mixed | +30,839,704 | $84.80M | EDGAR |