Institutional Manager · CIK 0001802528
Fairmount Funds Management LLC
WEST CONSHOHOCKEN, PA · File #028-19908
Latest AUM
$1.31B
Positions
13
Top-10 Concentration
92.0%
Filings
9
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 |
|---|---|---|---|---|---|
| EXITED | AXSOME THERAPEUTICS INC | 05464T104 | -815,176 | -$99.0M | $0 |
| EXITED | SCHOLAR ROCK HLDG CORP | 80706P103 | -1,824,031 | -$67.9M | $0 |
| EXITED | ABIVAX SA | 00370M103 | -713,434 | -$60.6M | $0 |
| REDUCE | DIANTHUS THERAPEUTICS INC | DNTH | -1,170,000 | -$48.2M | +$6.2M |
| EXITED | ASTRIA THERAPEUTICS INC | 04635X102 | -3,554,129 | -$25.9M | $0 |
| ADD | JADE BIOSCIENCES INC | JBIO | +1,333,126 | +$20.6M | +$21.9M |
| REDUCE | KINIKSA PHARMACEUTICALS INTL | G52694109 | -453,151 | -$18.7M | +$4.3M |
| ADD | CRESCENT BIOPHARMA INC. | CBIO | +1,360,000 | +$16.1M | -$41,636 |
| ADD | VIRIDIAN THERAPEUTICS INC | VRDN | +454,545 | +$14.1M | +$33.0M |
| ADD | ZENAS BIOPHARMA INC | ZBIO | +316,219 | +$11.5M | +$26.7M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202513 pos · $1.31B
- 13F HOLDINGS REPORTQ/E Sep 202517 pos · $1.11B
- 13F HOLDINGS REPORTQ/E Jun 202517 pos · $771.9M
- 13F HOLDINGS REPORTQ/E Mar 202515 pos · $644.6M
- 13F HOLDINGS REPORTQ/E Dec 202417 pos · $1.01B
- 13F HOLDINGS REPORTQ/E Sep 202415 pos · $1.23B
- 13F HOLDINGS REPORTQ/E Jun 202413 pos · $885.1M
- 13F HOLDINGS REPORTQ/E Mar 202415 pos · $917.4M
- 13F HOLDINGS REPORTQ/E Dec 202320 pos · $831.2M
Top 13 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | COGENT BIOSCIENCES INC | COGT | 9,003,418 | $319.8M | 24.34% |
| 2 | APOGEE THERAPEUTICS INC | APGE | 2,048,647 | $154.6M | 11.77% |
| 3 | SPYRE THERAPEUTICS INC | SYRE | 4,018,101 | $131.6M | 10.02% |
| 4 | VIRIDIAN THERAPEUTICS INC | VRDN | 3,914,458 | $121.8M | 9.27% |
| 5 | ORUKA THERAPEUTICS INC | ORKA | 3,705,262 | $112.3M | 8.55% |
| 6 | DIANTHUS THERAPEUTICS INC | DNTH | 2,137,191 | $88.1M | 6.70% |
| 7 | ZENAS BIOPHARMA INC | ZBIO | 2,209,025 | $80.2M | 6.11% |
| 8 | NUVALENT INC | NUVL | 727,563 | $73.2M | 5.57% |
| 9 | JADE BIOSCIENCES INC | JBIO | 4,553,494 | $70.3M | 5.35% |
| 10 | ENLIVEN THERAPEUTICS INC | ELVN | 3,711,444 | $57.2M | 4.35% |
| 11 | KINIKSA PHARMACEUTICALS INTL | G52694109 | 1,319,688 | $54.4M | 4.14% |
| 12 | CRESCENT BIOPHARMA INC. | CBIO | 2,747,866 | $32.6M | 2.48% |
| 13 | INHIBIKASE THERAPEUTICS INC | IKT | 8,625,000 | $17.7M | 1.35% |