Biotechnology Value Trading Fund OS LP
CIK 1660683 · last filed 2025-05-20
Biotechnology Value Trading Fund OS LP is a corporate insider who has filed 20 SEC Form 4 insider transactions across 14 companies since 2017. The most recent filing shows the insider sold $106.4M of XOMAP on May 20, 2025. Across all open-market trades the lifetime net is −$1.22B, making them a net seller over the disclosed history. Current disclosed insider exposure totals $442.2M across reported positions. The firm reports its address in Grand Cayman, E9. 237 SEC filings were submitted jointly with BIOTECHNOLOGY VALUE FUND II LP.
"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.
$442.17M
14
20
-$1.22B
Filer Profile
GRAND CAYMAN, E9 KY1-1104
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| XOMA Royalty Corp (XOMAP) Delisted | 1,322,758 | $24.98 | $33.04M | -$106.43M | 1 | 2025-05-20 | |
| KYMR | Director | 1,888,351 | $114.96 | $217.08M | $0 | 1 | 2023-06-20 |
| GPCR | 0 | $38.66 | $0 | $0 | 1 | 2023-05-12 | |
| Repare Therapeutics Inc. (RPTX) Delisted | 3,299,906 | $2.65 | $8.74M | $18.99M | 1 | 2022-06-15 | |
| CGEM | 364,161 | $20.59 | $7.50M | $82.65M | 1 | 2022-06-03 | |
| CTI BIOPHARMA CORP (CTIC) Delisted | 3,102,435 | $9.09 | $28.20M | $50.00M | 2 | 2021-04-05 | |
| Merus N.V. (MRUS) Delisted | 3,513,335 | $90.00 | $316.20M | $209.06M | 1 | 2021-01-25 | |
| CYTK | 2,777,320 | $73.77 | $204.88M | $0 | 1 | 2020-11-20 | |
| FIVE PRIME THERAPEUTICS, INC. (FPRX) Delisted | 670,695 | $38.00 | $25.49M | -$1.49B | 2 | 2020-11-13 | |
| CRESCENT BIOPHARMA, INC. (GLYC) Delisted | 32,062 | $15.70 | $503.4K | $25.65M | 1 | 2020-11-03 | |
| XOMA Royalty Corp (XOMA) Delisted | 2,022,816 | $40.17 | $81.26M | $4.31M | 3 | 2020-09-10 | |
| CONCERT PHARMACEUTICALS, INC. (CNCE) Delisted | 952,859 | $8.37 | $7.98M | -$28.94M | 1 | 2019-06-12 | |
| XENE | 216,694 | $58.65 | $12.71M | $0 | 1 | 2018-03-29 | |
| INFINITY PHARMACEUTICALS, INC. (INFI) Delisted | 2,968,487 | $0.04 | $132.7K | $14.06M | 1 | 2017-10-05 |
Recent Filings
20 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-05-20 | XOMA Royalty Corp (XOMAP) Delisted | Sell (S) | −3,927,230 | -$106.43M | EDGAR |
| 2025-05-19 | — | Disp (D) | −163,128,720 | $0 | |
| 2023-06-28 | — | Mixed | −88,561,600 | -$805.91M | |
| 2023-06-20 | KYMR | Grant (A) | — | $0 | EDGAR |
| 2023-05-12 | GPCR | Other (J) | −74,105,180 | $0 | EDGAR |
| 2022-06-15 | Repare Therapeutics Inc. (RPTX) Delisted | Buy (P) | +1,491,610 | $18.99M | EDGAR |
| 2022-06-03 | CGEM | Buy (P) | +7,513,960 | $82.65M | EDGAR |
| 2021-04-05 | CTI BIOPHARMA CORP (CTIC) Delisted | Buy (P) | +20,000,000 | $50.00M | EDGAR |
| 2021-03-12 | CTI BIOPHARMA CORP (CTIC) Delisted | Grant (A) | — | $0 | EDGAR |
| 2021-01-25 | Merus N.V. (MRUS) Delisted | Buy (P) | +8,446,800 | $209.06M | EDGAR |
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.