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Fairmount Funds Management LLC

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13F filer, CIK 1802528, WEST CONSHOHOCKEN, PA

Fairmount Funds Management LLC reported $1,005,884,370 across 17 holdings for the quarter ended 2024-12-31, in a 13F-HR filed 2025-02-14. Its ten largest share positions make up 80.48% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001104659-25-014003

Period
2024-12-31
Reported value
$1.01B
Holdings
17
Top 10 weight
80.48%
New
3
Sold out
1

Part of the filer group Fairmount Funds Management LLC

  • Fairmount Healthcare Fund II L.P.
  • Harwin Peter Evan
  • Kiselak Tomas
How groups are built

Largest buys vs the previous quarter

SecurityShares changeApprox. value
SRRKnew+1,962,953$84.8M
ANABnew+1,816,466$24.1M
IKTnew+6,125,000$19.9M
ORKAadded+160,000$3.1M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
AXSMreduced-891,094-$75.4M
NUVLreduced-369,400-$28.9M
KNSAreduced-1,010,500-$20M
BCYCexited-123,538-$2.8M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2024

Share positions as resolved from 13F-HR 0001104659-25-014003, largest first. % of portfolio is the value over $1,005,884,370, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
AXSMAXSOME THERAPEUTICS INC.Quarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,360,077 shares; 2024Q4: 1,468,983 shares 1,468,983$124M12.36%-891,094Timeline
NUVLNUVALENT INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,687,064 shares; 2024Q4: 1,317,664 shares 1,317,664$103M10.25%-369,400Timeline
SYRESPYRE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 4,018,101 shares; 2024Q4: 4,018,101 shares 4,018,101$93.5M9.3%02026-10-07, 13D/A: 10,185,961 shares, 9.99% of the class, 13D/A filed 2026-10-09 Timeline
APGEAPOGEE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,048,647 shares; 2024Q4: 2,048,647 shares 2,048,647$92.8M9.23%0Timeline
SRRKSCHOLAR ROCK HLDG CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 1,962,953 shares 1,962,953$84.8M8.43%newTimeline
ELVNENLIVEN THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,202,798 shares; 2024Q4: 3,202,798 shares 3,202,798$72.1M7.16%0Timeline
VRDNVIRIDIAN THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,445,813 shares; 2024Q4: 3,445,813 shares 3,445,813$66.1M6.57%0Timeline
ORKAORUKA THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,211,922 shares; 2024Q4: 3,371,922 shares 3,371,922$65.4M6.5%+160,000Timeline
DNTHDIANTHUS THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,700,691 shares; 2024Q4: 2,700,691 shares 2,700,691$58.9M5.85%0Timeline
COGTCOGENT BIOSCIENCES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 6,225,641 shares; 2024Q4: 6,225,641 shares 6,225,641$48.6M4.83%0Timeline
KNSAKINIKSA PHARMACEUTICALS INTLQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,204,841 shares; 2024Q4: 2,194,341 shares 2,194,341$43.4M4.32%-1,010,500Timeline
DAWNDAY ONE BIOPHARMACEUTICALS IQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,103,448 shares; 2024Q4: 3,103,448 shares 3,103,448$39.3M3.91%0Timeline
ASTRIA THERAPEUTICS INCASTRIA THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,554,129 shares; 2024Q4: 3,554,129 shares 3,554,129$31.8M3.16%0
ANABANAPTYSBIO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 1,816,466 shares 1,816,466$24.1M2.39%newTimeline
BCAXBICARA THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,284,169 shares; 2024Q4: 1,284,169 shares 1,284,169$22.4M2.22%0Timeline
IKTINHIBIKASE THERAPEUTICS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 6,125,000 shares 6,125,000$19.9M1.98%newTimeline
ZBIOZENAS BIOPHARMA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q1: restricted; 2023Q2: restricted; 2023Q3: restricted; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,892,806 shares; 2024Q4: 1,892,806 shares 1,892,806$15.5M1.54%0Timeline

Sold out in Q4 2024

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
BCYCBICYCLE THERAPEUTICS PLC123,538$2.8Mshares

How Q4 2024 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001104659-25-014003 base2025-02-14acceptance time not in the bulk data set