SEC Insider Transactions from Fairmount Funds Management LLC.

Last updated: 2026-04-01 21:05 UTC | Total transactions: 99

Fairmount Funds Management LLC has filed 99 insider transactions across 10 companies since July 2023.

Most recent transaction: a purchase of 150000 shares of Zenas BioPharma, Inc. ($ZBIO) on March 31, 2026.

Activity breakdown: 13 open-market purchases and 3 sales.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
March 31, 2026 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director P Common Stock 150000 $20.00 2,359,025.0000 44,730,052 6.79% 0.34%
March 31, 2026 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Director C Common Stock 7000000 $0.00 12,503,418.0000 162,308,820 127.19% 4.31%
March 31, 2026 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Director C Series A Convertible Preferred Stock 28000 $0.00 39,414.0000 162,308,820 41.53% 0.02%
March 31, 2026 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Director S Common Stock 7000000 $34.66 5,503,418.0000 162,308,820 55.98% 4.31%
March 23, 2026 Damora Therapeutics, Inc. $DMRA Fairmount Funds Management LLC Not found A Stock Option (right to buy) 37313 $0.00 37,313.0000 1,327,212 9999.99% 2.81%
Feb. 9, 2026 Damora Therapeutics, Inc. $DMRA Fairmount Funds Management LLC Not found M Series C Preferred Stock 2904 $0.00 1,722.0000 1,327,212 62.78% 0.22%
Feb. 9, 2026 Damora Therapeutics, Inc. $DMRA Fairmount Funds Management LLC Not found M Common Stock 5809000 $0.00 8,713,000.0000 1,327,212 200.03% 100.00%
Feb. 9, 2026 Damora Therapeutics, Inc. $DMRA Fairmount Funds Management LLC Not found M Common Stock 2904000 $0.00 8,713,000.0000 1,327,212 49.99% 100.00%
Feb. 9, 2026 Damora Therapeutics, Inc. $DMRA Fairmount Funds Management LLC Not found M Series C Preferred Stock 5809 $0.00 1,722.0000 1,327,212 77.13% 0.44%
Jan. 22, 2026 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Director S Common Stock 3500000 $36.40 5,503,418.0000 142,376,529 38.87% 2.46%
Jan. 22, 2026 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director S Common Stock 1750000 $76.30 400,979.0000 68,320,229 81.36% 2.56%
Dec. 4, 2025 CRESCENT BIOPHARMA, INC. $CBIO Fairmount Funds Management LLC Director P Pre-Funded Warrant (Right to Buy) 131434 $13.41 1,768,140.0000 13,892,516 8.03% 0.95%
Dec. 4, 2025 CRESCENT BIOPHARMA, INC. $CBIO Fairmount Funds Management LLC Director P Ordinary Shares 1360000 $13.41 2,747,866.0000 13,892,516 97.99% 9.79%
Oct. 23, 2025 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Director P Common Stock 454545 $22.00 3,914,458.0000 81,484,950 13.14% 0.56%
Oct. 7, 2025 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director P Common Stock 316219 $19.00 2,209,025.0000 42,159,340 16.71% 0.75%
Oct. 6, 2025 Jade Biosciences, Inc. $JBIO Fairmount Funds Management LLC Director A Pre-Funded Warrant (Right to Buy) 855047 $9.14 855,047.0000 0 9999.99% 0.00%
Oct. 6, 2025 Jade Biosciences, Inc. $JBIO Fairmount Funds Management LLC Director A Common Stock 1333126 $9.14 4,553,494.0000 0 41.40% 0.00%
Sept. 17, 2025 Oruka Therapeutics, Inc. $ORKA Fairmount Funds Management LLC Director A Common Stock 333340 $15.00 3,705,262.0000 42,095,951 9.89% 0.79%
July 10, 2025 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Director P Common Stock 2777777 $9.00 9,003,418.0000 113,850,090 44.62% 2.44%
June 23, 2025 CRESCENT BIOPHARMA, INC. $CBIO Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 9023 $0.00 9,023.0000 0 9999.99% 0.00%
June 17, 2025 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 14461 $0.00 28,922.0000 46,016,542 100.00% 0.03%
June 17, 2025 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 14461 $0.00 28,922.0000 46,016,542 100.00% 0.03%
June 10, 2025 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 41,800,802 9999.99% 0.04%
June 10, 2025 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Director M Stock Option (Right to Buy) 12500 $0.00 0.0000 81,484,950 100.00% 0.02%
June 10, 2025 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Director M Common Stock 12500 $12.31 3,459,913.0000 81,484,950 0.36% 0.02%
June 9, 2025 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Director M Stock Option (Right to Buy) 1600 $0.00 0.0000 81,484,950 100.00% 0.00%
June 9, 2025 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Director M Common Stock 1600 $7.80 3,447,413.0000 81,484,950 0.05% 0.00%
June 2, 2025 Oruka Therapeutics, Inc. $ORKA Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 17500 $0.00 17,500.0000 41,679,560 9999.99% 0.04%
May 29, 2025 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 25000 $0.00 50,000.0000 60,275,561 100.00% 0.04%
May 29, 2025 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 25000 $0.00 50,000.0000 60,275,561 100.00% 0.04%
April 29, 2025 Jade Biosciences, Inc. $JBIO Fairmount Funds Management LLC Not found A Stock Option (Right to Buy) 23017 $0.00 23,017.0000 0 9999.99% 0.00%
Nov. 19, 2024 Oruka Therapeutics, Inc. $ORKA Fairmount Funds Management LLC Director M Common Stock 160000 $0.00 3,371,922.0000 15,013,655 4.98% 1.07%
Nov. 19, 2024 Oruka Therapeutics, Inc. $ORKA Fairmount Funds Management LLC Director M Series A Non-Voting Convertible Preferred Stock 160 $0.00 0.0000 15,013,655 100.00% 0.00%
Sept. 27, 2024 Dianthus Therapeutics, Inc. /DE/ $DNTH Fairmount Funds Management LLC Director J Common Stock 62146 $0.00 2,700,691.0000 0 2.25% 0.00%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director P Common Stock 300000 $17.00 1,892,806.0000 1,567,269 18.83% 19.14%
Sept. 13, 2024 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Director P Common Stock 1600000 $18.75 3,445,813.0000 0 86.68% 0.00%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Common Stock 41130 $0.00 329,045.0000 1,567,269 14.29% 2.62%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Common Stock 252890 $0.00 581,935.0000 1,567,269 76.86% 16.14%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Common Stock 709794 $0.00 1,291,729.0000 1,567,269 121.97% 45.29%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Common Stock 301077 $0.00 1,592,806.0000 1,567,269 23.31% 19.21%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Series Seed Convertible Preferred Stock 357143 $0.00 0.0000 1,567,269 100.00% 22.79%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Series A Convertible Preferred Stock 2195871 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Series B Convertible Preferred Stock 6163236 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Series C Convertible Preferred Stock 2614287 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 12, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Common Stock 301077 $0.00 1,304,891.0000 1,567,269 29.99% 19.21%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Common Stock 41130 $0.00 41,140.0000 1,567,269 9999.99% 2.62%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Common Stock 252890 $0.00 294,020.0000 1,567,269 614.86% 16.14%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Common Stock 709794 $0.00 1,003,814.0000 1,567,269 241.41% 45.29%
Sept. 12, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Series C Convertible Preferred Stock 2614287 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Series B Convertible Preferred Stock 6163236 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Series A Convertible Preferred Stock 2195871 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director C Series Seed Convertible Preferred Stock 357143 $0.00 0.0000 1,567,269 100.00% 22.79%
Sept. 16, 2024 Zenas BioPharma, Inc. $ZBIO Fairmount Funds Management LLC Director P Common Stock 300000 $17.00 1,604,891.0000 1,567,269 22.99% 19.14%
Sept. 11, 2024 Oruka Therapeutics, Inc. $ORKA Fairmount Funds Management LLC Director A Series A Non-Voting Convertible Preferred Stock 160 $23000.00 160.0000 3,197,975 9999.99% 0.01%
Sept. 11, 2024 Oruka Therapeutics, Inc. $ORKA Fairmount Funds Management LLC Director A Common Stock 275000 $23.00 3,211,922.0000 3,197,975 9.36% 8.60%
June 10, 2024 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Not found M Common Stock 1500000 $0.00 6,225,641.0000 0 31.74% 0.00%
June 10, 2024 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Not found M Series B Convertible Preferred Stock 1500 $0.00 0.0000 0 100.00% 0.00%
June 5, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 10370 $0.00 10,370.0000 0 9999.99% 0.00%
June 5, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 10370 $0.00 10,370.0000 0 9999.99% 0.00%
May 23, 2024 Dianthus Therapeutics, Inc. /DE/ $DNTH Fairmount Funds Management LLC Not found A Stock Option (Right to Buy) 11000 $0.00 11,000.0000 0 9999.99% 0.00%
May 14, 2024 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found A Stock Option (Right to Buy) 11323 $0.00 22,646.0000 0 100.00% 0.00%
May 14, 2024 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found A Stock Option (Right to Buy) 11323 $0.00 22,646.0000 0 100.00% 0.00%
April 25, 2024 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found M Series A Preferred Stock 90992 $0.00 346,045.0000 0 20.82% 0.00%
April 25, 2024 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found M Common Stock 3639680 $0.00 4,830,177.0000 0 305.73% 0.00%
March 28, 2024 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Not found J Series A Convertible Preferred Stock 11914 $0.00 67,414.0000 0 15.02% 0.00%
March 28, 2024 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Not found J Series A Non-Voting Convertible Preferred Stock 21999 $0.00 133,191.0000 0 14.18% 0.00%
March 28, 2024 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Not found J Common Stock 5859 $0.00 1,845,813.0000 0 0.32% 0.00%
March 28, 2024 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Not found J Common Stock 5859 $0.00 1,845,813.0000 0 0.32% 0.00%
April 1, 2024 Dianthus Therapeutics, Inc. /DE/ $DNTH Fairmount Funds Management LLC Not found J Common Stock 58857 $0.00 2,762,837.0000 0 2.18% 0.00%
April 1, 2024 Dianthus Therapeutics, Inc. /DE/ $DNTH Fairmount Funds Management LLC Not found J Common Stock 58857 $0.00 2,762,837.0000 0 2.09% 0.00%
March 28, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director J Non-Voting Common Stock 221426 $0.00 6,743,321.0000 0 3.18% 0.00%
March 28, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director J Common Stock 55913 $0.00 2,150,979.0000 0 2.67% 0.00%
March 28, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director J Common Stock 55913 $0.00 2,150,979.0000 0 2.53% 0.00%
March 28, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director J Non-Voting Common Stock 221426 $0.00 6,743,321.0000 0 3.40% 0.00%
March 28, 2024 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Not found J Common Stock 286851 $0.00 4,725,641.0000 0 5.72% 0.00%
March 28, 2024 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Not found J Common Stock 286851 $0.00 4,725,641.0000 0 6.46% 0.00%
March 28, 2024 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Not found J Series A Non-Voting Convertible Preferred Stock 21999 $0.00 133,191.0000 0 19.78% 0.00%
March 28, 2024 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Not found J Series A Convertible Preferred Stock 11914 $0.00 67,414.0000 0 21.47% 0.00%
Feb. 16, 2024 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Not found A Series B Convertible Preferred Stock 1500 $7500.00 1,500.0000 0 9999.99% 0.00%
Feb. 16, 2024 Cogent Biosciences, Inc. $COGT Fairmount Funds Management LLC Not found A Common Stock 1166666 $7.50 4,725,641.0000 0 32.78% 0.00%
Jan. 29, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director J Common Stock 892529 $0.00 102,332.0000 0 89.71% 0.00%
Jan. 29, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director J Common Stock 51166 $0.00 102,332.0000 0 100.00% 0.00%
Jan. 29, 2024 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director J Common Stock 51166 $0.00 102,332.0000 0 100.00% 0.00%
Jan. 22, 2024 Viridian Therapeutics, Inc.\DE $VRDN Fairmount Funds Management LLC Not found P Common Stock 476190 $21.00 1,845,813.0000 0 34.77% 0.00%
Jan. 22, 2024 Dianthus Therapeutics, Inc. /DE/ $DNTH Fairmount Funds Management LLC Not found A Common Stock 834334 $12.00 2,762,837.0000 0 43.26% 0.00%
Jan. 22, 2024 Dianthus Therapeutics, Inc. /DE/ $DNTH Fairmount Funds Management LLC Not found A Pre-Funded Warrants (Right to Buy) 832333 $12.00 832,333.0000 0 9999.99% 0.00%
Dec. 29, 2023 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found J Common Stock 406038 $0.00 1,190,497.0000 0 51.76% 0.00%
Dec. 29, 2023 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found J Common Stock 3435480 $0.00 1,190,497.0000 0 74.26% 0.00%
Dec. 29, 2023 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found J Common Stock 406038 $0.00 1,190,497.0000 0 51.76% 0.00%
Dec. 7, 2023 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found A Series B Preferred Stock 16667 $600.00 16,667.0000 0 9999.99% 0.00%
Nov. 24, 2023 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found C Common Stock 3435480 $0.00 3,813,901.0000 0 907.85% 0.00%
Nov. 24, 2023 Spyre Therapeutics, Inc. $SYRE Fairmount Funds Management LLC Not found C Series A Preferred Stock 85887 $0.00 437,037.0000 0 16.42% 0.00%
July 13, 2023 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 47758 $0.00 47,758.0000 0 9999.99% 0.00%
July 13, 2023 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director P Common Stock 892529 $17.00 2,941,176.0000 0 43.57% 0.00%
July 13, 2023 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director P Common Stock 1992734 $17.00 2,941,176.0000 0 210.11% 0.00%
July 13, 2023 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director P Common Stock 55913 $17.00 2,941,176.0000 0 1.94% 0.00%
July 13, 2023 Apogee Therapeutics, Inc. $APGE Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 47758 $0.00 47,758.0000 0 9999.99% 0.00%