Institutional Manager · CIK 0001637359
Omega Fund Management, LLC
Boston, MA · File #028-16844
Latest AUM
$286.5M
Positions
11
Top-10 Concentration
99.2%
Filings
10
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | Beta Bionics Inc. | BBNX | -603,942 | -$18.4M | +$20.4M |
| REDUCE | Kestra Med Technologies Ltd | BEKE | -272,302 | -$7.2M | +$4.5M |
| REDUCE | Nuvation Bio | NUVB | -750,000 | -$6.7M | +$46.5M |
| ADD | enGene Holdings Inc. | ENGNW | +350,000 | +$3.2M | +$1.2M |
| REDUCE | Upstream Bio Inc. | UPB | -30,000 | -$814,500 | +$11.3M |
| EXITED | enGene Holdings Inc. | 29286M113 | -89,702 | -$63,438 | $0 |
| REDUCE | Alumis Inc. | ALMS | 0 | $0 | +$3.8M |
| REDUCE | Bicara Therapeutics Inc. | BCAX | 0 | $0 | +$2.3M |
| REDUCE | BridgeBio Oncology Therapeutics Inc. | BBOT | 0 | $0 | +$3.1M |
| REDUCE | ImageneBio, Inc. | IMA | 0 | $0 | -$569,201 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202511 pos · $286.5M
- 13F HOLDINGS REPORTQ/E Sep 202512 pos · $222.4M
- 13F HOLDINGS REPORTQ/E Jun 202513 pos · $154.4M
- 13F HOLDINGS REPORTQ/E Mar 202513 pos · $169.5M
- 13F HOLDINGS REPORT (Amended)Q/E Mar 20251 pos · $33.5M
- 13F HOLDINGS REPORTQ/E Dec 202411 pos · $120.7M
- 13F HOLDINGS REPORTQ/E Sep 202411 pos · $160.0M
- 13F HOLDINGS REPORTQ/E Jun 202411 pos · $135.0M
- 13F HOLDINGS REPORTQ/E Mar 202411 pos · $155.0M
- 13F HOLDINGS REPORTQ/E Dec 202312 pos · $108.9M
Top 11 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | Nuvation Bio | NUVB | 8,081,089 | $72.4M | 25.27% |
| 2 | BridgeBio Oncology Therapeutics Inc. | BBOT | 3,289,661 | $41.2M | 14.37% |
| 3 | Beta Bionics Inc. | BBNX | 1,316,183 | $40.1M | 14.00% |
| 4 | Bicara Therapeutics Inc. | BCAX | 2,204,650 | $37.1M | 12.95% |
| 5 | Kestra Med Technologies Ltd | BEKE | 1,373,591 | $36.4M | 12.71% |
| 6 | Upstream Bio Inc. | UPB | 1,326,293 | $36.0M | 12.57% |
| 7 | enGene Holdings Inc. | ENGNW | 876,357 | $7.9M | 2.76% |
| 8 | Alumis Inc. | ALMS | 653,223 | $6.4M | 2.23% |
| 9 | Sana Biotechnology, Inc. | SANA | 843,750 | $3.4M | 1.20% |
| 10 | ImageneBio, Inc. | IMA | 455,361 | $3.1M | 1.10% |
| 11 | Replimune Group | REPL | 248,672 | $2.4M | 0.84% |