Fairmount Funds Management LLC

13F Portfolio Filings

Most recent 13F
Q2 2026
13D/G filings
13D on 10 securities, 13G on 5 securities
Location
West Conshohocken, PA
CIK
0001802528
All SEC filings
View on sec.gov
Holdings Value
Quarter Holdings Value ($000) Top Holdings Form Type Date Filed Filing ID
Q2 2026 12 1,512,967 ORKA, DNTH, DMRA, COGT 13F-HR 8/14/2026 000110465926096405
Q1 2026 12 1,384,339 DMRA, DNTH, COGT, SYRE 13F-HR 5/15/2026 000110465926062419
Q4 2025 13 1,313,784 COGT, APGE, SYRE, VRDN 13F-HR 2/17/2026 000110465926016303
Q3 2025 17 1,111,423 DNTH, COGT, AXSM, APGE 13F-HR 11/14/2025 000110465925112427
Q2 2025 17 771,902 APGE, AXSM, ELVN, SRRK 13F-HR 8/14/2025 000110465925078521
Q1 2025 15 644,620 AXSM, APGE, SYRE, ELVN 13F-HR 5/15/2025 000110465925049337
Q4 2024 17 1,005,884 AXSM, NUVL, SYRE, APGE 13F-HR 2/14/2025 000110465925014003
Q3 2024 15 1,233,275 AXSM, NUVL, APGE, SYRE 13F-HR 11/14/2024 000110465924118833
Q2 2024 13 885,124 AXSM, NUVL, SYRE, APGE 13F-HR 8/14/2024 000110465924089572
Q1 2024 15 917,385 AXSM, NUVL, APGE, DNTH 13F-HR 5/15/2024 000110465924061870
Q4 2023 16 946,456 AXSM, IMGN, NUVL, APGE 13F-HR 2/14/2024 000110465924023531
Q3 2023 20 831,172 AXSM, NUVL, IMGN, APGE 13F-HR 11/14/2023 000110465923118043
Q2 2023 17 709,301 AXSM, NUVL, IMGN, ELVN 13F-HR 8/14/2023 000110465923091264
Q1 2023 16 581,468 AXSM, NUVL, VRNA, ONC 13F-HR 5/15/2023 000110465923060312
Q4 2022 16 630,363 AXSM, NUVL, VRNA, ONC 13F-HR 2/14/2023 000110465923021407
Q3 2022 27 568,894 AXSM, COGT, NUVL, BCRX 13F-HR 11/9/2022 000110465922116268
Q2 2022 27 436,929 BHVN, AXSM, BCRX, GBT 13F-HR 8/15/2022 000110465922091338
Q1 2022 22 422,935 INSM, GBT, ARGX, AXSM 13F-HR 5/16/2022 000180252822000004
Q4 2021 20 303,335 ZGNX, INSM, ENTA, ARGX 13F-HR 2/14/2022 000180252822000002
Q3 2021 20 274,991 INSM, ZGNX, NUVL, ALLK 13F-HR 11/15/2021 000180252821000008
Q2 2021 19 243,235 INSM, ZGNX, AXSM, ARGX 13F-HR 8/13/2021 000180252821000007
Q1 2021 21 237,245 INSM, ZGNX, IOVA, ALLK 13F-HR 5/14/2021 000180252821000005
Q4 2020 18 279,600 INSM, FOLD, IOVA, ACAD 13F-HR 2/12/2021 000180252821000002
Q3 2020 17 236,102 INSM, ACAD, TRIL, FOLD 13F-HR 11/12/2020 000180252820000011
Q2 2020 14 224,208 ACAD, INSM, ZGNX, FOLD 13F-HR 8/4/2020 000180252820000008
Q1 2020 14 164,882 ACAD, ZGNX, INSM, IOVA 13F-HR 5/8/2020 000180252820000006
Q4 2019 15 164,989 ZGNX, INSM, ACAD, AMRN 13F-HR 2/12/2020 000180252820000004

13D and 13G Filings

All 13D and 13G filings

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each security where the latest filing since 12/18/2024 is a 13D, newest first.

Issuer % of Class Filed
Spyre Therapeutics, Inc. 13D/A
SYRE · 00773J202
 10.0% 10/9/2026
Event 10/7/2026
Korsana Biosciences, Inc. 13D
KRSA · 23255M303
 20.0% 9/11/2026
Event 9/8/2026
Crescent Biopharma, Inc. 13D/A
CBIO · G2545C104
 16.5% 7/20/2026
Event 7/16/2026
Oruka Therapeutics, Inc. 13D/A
ORKA · 687604108
 19.5% 7/1/2026
Event 7/1/2026
Jade Biosciences, Inc. 13D/A
JBIO · 008064206
 20.0% 6/9/2026
Event 6/5/2026
Viridian Therapeutics, Inc.\DE 13D/A
VRDN · 92790C104
 14.0% 5/13/2026
Event 5/11/2026
Cogent Biosciences, Inc. 13D/A
COGT · 19240Q201
 8.6% 3/31/2026
Event 3/31/2026
Galecto, Inc. 13D/A
DMRA · 36322Q206
 20.0% 2/11/2026
Event 2/9/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (2)
Apogee Therapeutics, Inc. 13D/A
APGE · 03770N101
 0% 9/3/2026
Event 9/3/2026
Dianthus Therapeutics, Inc. 13D/A
DNTH · 252828108
 4.9% 11/25/2025
Event 11/21/2025

5 other securities where the latest filing is a 13G, the newest filed 5/15/2026. View all