Wellington Biomedical Innovation Master Investors (Cayman) II L.P.
CIK 1903360 · last filed 2026-05-01
Wellington Biomedical Innovation Master Investors (Cayman) II L.P. is a corporate insider who has filed 6 SEC Form 4 insider transactions across 6 companies since 2023. The most recent filing, for AVLN, was dated May 1, 2026. Current disclosed insider exposure totals $69.0M 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.
$69.03M
6
6
$0
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| AVLN | 10%+ Owner | 1,275,486 | — | — | $0 | 1 | 2026-05-01 |
| Metsera, Inc. (MTSR) Delisted | 10%+ Owner | 1,857,699 | $70.50 | $130.97M | $0 | 1 | 2025-02-03 |
| UPB | 10%+ Owner | 894,733 | $6.10 | $5.46M | $0 | 1 | 2024-10-15 |
| MBX | 10%+ Owner | 1,790,122 | $35.51 | $63.57M | $0 | 1 | 2024-09-17 |
| CARGO Therapeutics, Inc. (CRGX) Delisted | 10%+ Owner | 737,000 | $4.47 | $3.29M | $0 | 1 | 2023-11-16 |
| RayzeBio, Inc. (RYZB) Delisted | 10%+ Owner | 1,557,846 | $62.49 | $97.35M | $0 | 1 | 2023-09-19 |
Recent Filings
6 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-01 | AVLN | Conv (C) | +1,275,486 | $0 | EDGAR |
| 2025-02-03 | Metsera, Inc. (MTSR) Delisted | Conv (C) | +1,857,699 | $0 | EDGAR |
| 2024-10-15 | UPB | Conv (C) | +894,733 | $0 | EDGAR |
| 2024-09-17 | MBX | Conv (C) | +1,790,122 | $0 | EDGAR |
| 2023-11-16 | CARGO Therapeutics, Inc. (CRGX) Delisted | Conv (C) | +737,000 | $0 | EDGAR |
| 2023-09-19 | RayzeBio, Inc. (RYZB) Delisted | Conv (C) | +1,557,846 | $0 | EDGAR |