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FL

Fairmount Funds Management Llc

DNTH
DIRECTOR · DIANTHUS THERAPEUTICS, INC. /DE/ · CIK 0001802528
FILING MIX · LIFETIME71%/29%
BUYS
80
SELLS
33
TOTAL VALUE
$1.55B
COMPANIES
10
ACTIVE SINCE
Sep 2021
HOLDINGS NOW
12,265,594
AVG SELL PX
$58.73
TRADE KIND
SHOWING 113 / 113
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
21 backtested trades · 8 horizons · 24 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Fairmount Funds Management Llc, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d21+85.71%+7.71%+0.37%+7.34%+6.00%—
14d21+61.90%+3.49%+0.11%+3.38%+2.37%—
30d21+57.14%+4.44%+0.96%+3.47%-0.80%—
60d21+47.62%+7.07%+2.66%+5.85%-5.55%—
90d21+42.86%+0.43%+5.40%-4.97%-11.65%—
180d21(4 pending)+70.59%+53.23%+9.36%+44.05%+47.04%—
1y21(9 pending)+66.67%+52.04%+21.31%+30.73%+48.54%—
2y21(11 pending)+80.00%+101.69%+44.67%+57.02%+68.28%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
DNTH · 0 shares · as of Sep 27, 2024
0690,7091,381,4192,072,1282,762,8372024SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
2026
FLOW · 80 buys / 33 sellsCOVERAGE · 21 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ORKA
ORUKA THERAPEUTICS, INC.
PURCHASE
3,553,410——4,685,364Jul 1, 2026Jul 1, 2026 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
SALE
42,641——94,497Jul 1, 2026Jul 1, 2026 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
SALE
3,553,410$84.43$300.01M1,131,954Jul 1, 2026Jul 1, 2026 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
SALE
16,667——0Jun 23, 2026Jun 23, 2026 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
SALE
4,684,781$85.31$399.66M0Jun 23, 2026Jun 23, 2026 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
PURCHASE
666,680——4,684,781Jun 23, 2026Jun 23, 2026 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
7,657——7,657Jun 9, 2026Jun 11, 2026 ↗View →
JBIO
JADE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
34,843——34,843Jun 9, 2026Jun 11, 2026 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
9,136——9,136Jun 2, 2026Jun 3, 2026 ↗View →
CBIO
CRESCENT BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
11,050——11,050Jun 2, 2026Jun 3, 2026 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
8,026——8,026May 27, 2026May 29, 2026 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
1,176,470$17.00$20.00M5,090,928May 11, 2026May 13, 2026 ↗View →
COGT
COGENT BIOSCIENCES, INC.
SALE
7,000,000$34.66$242.62M5,503,418Mar 31, 2026Mar 31, 2026 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASE
7,000,000——12,503,418Mar 31, 2026Mar 31, 2026 ↗View →
COGT
COGENT BIOSCIENCES, INC.
SALE
28,000——39,414Mar 31, 2026Mar 31, 2026 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
150,000$20.00$3.00M2,359,025Mar 31, 2026Apr 1, 2026 ↗View →
GLTO
GALECTO, INC.
PURCHASEGRANT
Stock grant
37,313——37,313Mar 23, 2026Mar 25, 2026 ↗View →
GLTO
GALECTO, INC.
SALE
2,904——574Feb 9, 2026Feb 12, 2026 ↗View →
GLTO
GALECTO, INC.
PURCHASE
2,904,000——2,904,000Feb 9, 2026Feb 12, 2026 ↗View →
GLTO
GALECTO, INC.
PURCHASE
5,809,000——5,809,000Feb 9, 2026Feb 12, 2026 ↗View →
GLTO
GALECTO, INC.
SALE
5,809——1,148Feb 9, 2026Feb 12, 2026 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
SALE
1,750,000$76.30$133.53M298,647Jan 22, 2026Jan 22, 2026 ↗View →
COGT
COGENT BIOSCIENCES, INC.
SALE
3,500,000$36.40$127.40M5,503,418Jan 22, 2026Jan 22, 2026 ↗View →
CBIO
CRESCENT BIOPHARMA, INC.
PURCHASE
1,360,000$13.41$18.24M2,747,866Dec 4, 2025Dec 8, 2025 ↗View →
CBIO
CRESCENT BIOPHARMA, INC.
PURCHASE
131,434$13.41$1.76M1,768,140Dec 4, 2025Dec 8, 2025 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
454,545$22.00$10.00M3,914,458Oct 23, 2025Oct 27, 2025 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
316,219$19.00$6.01M2,209,025Oct 7, 2025Oct 9, 2025 ↗View →
JBIO
JADE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
855,047$9.14$7.82M855,047Oct 6, 2025Oct 8, 2025 ↗View →
JBIO
JADE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
1,333,126$9.14$12.18M1,897,677Oct 6, 2025Oct 8, 2025 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
333,340$15.00$5.00M1,131,954Sep 17, 2025Sep 19, 2025 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASE
2,777,777$9.00$25.00M9,003,418Jul 10, 2025Jul 14, 2025 ↗View →
CBIO
CRESCENT BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
9,023——9,023Jun 23, 2025Jun 23, 2025 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
14,461——14,461Jun 17, 2025Jun 20, 2025 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
SALE
12,500——0Jun 10, 2025Jun 11, 2025 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
12,500$12.31$153.9K3,459,913Jun 10, 2025Jun 11, 2025 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
18,500——18,500Jun 10, 2025Jun 12, 2025 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
SALE
1,600——0Jun 9, 2025Jun 11, 2025 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
1,600$7.80$12.5K3,447,413Jun 9, 2025Jun 11, 2025 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
17,500——17,500Jun 2, 2025Jun 3, 2025 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
25,000——25,000May 29, 2025Jun 2, 2025 ↗View →
JBIO
JADE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
23,017——23,017Apr 29, 2025May 1, 2025 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
SALE
160——0Nov 19, 2024Nov 21, 2024 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
PURCHASE
160,000——798,614Nov 19, 2024Nov 21, 2024 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
SALE
62,146——0Sep 27, 2024Oct 1, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
SALE
6,163,236——0Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
SALE
2,195,871——0Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
41,130——329,045Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
252,890——581,935Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
301,077——1,592,806Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
709,794——1,291,729Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
SALE
357,143——0Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
300,000$17.00$5.10M1,892,806Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
SALE
2,614,287——0Sep 16, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
SALE
2,195,871——0Sep 16, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
SALE
6,163,236——0Sep 16, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
301,077——1,304,891Sep 16, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
709,794——1,003,814Sep 16, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
41,130——41,140Sep 16, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
SALE
2,614,287——0Sep 16, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
252,890——294,020Sep 16, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
SALE
357,143——0Sep 16, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASE
300,000$17.00$5.10M1,604,891Sep 16, 2024Sep 16, 2024 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
1,600,000$18.75$30.00M3,445,813Sep 13, 2024Sep 17, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
37,000——37,000Sep 12, 2024Sep 16, 2024 ↗View →
ZBIO
ZENAS BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
37,000——37,000Sep 12, 2024Sep 17, 2024 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
160$23,000.00$3.68M160Sep 11, 2024Sep 13, 2024 ↗View →
ORKA
ORUKA THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
275,000$23.00$6.33M638,614Sep 11, 2024Sep 13, 2024 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASE
1,500,000——6,225,641Jun 10, 2024Jun 12, 2024 ↗View →
COGT
COGENT BIOSCIENCES, INC.
SALE
1,500——0Jun 10, 2024Jun 12, 2024 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
10,370——10,370Jun 5, 2024Jun 7, 2024 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASEGRANT
Stock grant
11,000——11,000May 23, 2024May 28, 2024 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
11,323——11,323May 14, 2024May 16, 2024 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
SALE
90,992——346,045Apr 25, 2024Apr 25, 2024 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
PURCHASE
3,639,680——4,018,101Apr 25, 2024Apr 25, 2024 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASE
58,857——2,700,691Apr 1, 2024Apr 1, 2024 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
SALE
58,857——0Apr 1, 2024Apr 1, 2024 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASE
286,851——4,725,641Mar 28, 2024Apr 1, 2024 ↗View →
COGT
COGENT BIOSCIENCES, INC.
SALE
11,914——0Mar 28, 2024Apr 1, 2024 ↗View →
COGT
COGENT BIOSCIENCES, INC.
SALE
286,851——0Mar 28, 2024Apr 1, 2024 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASE
11,914——67,414Mar 28, 2024Apr 1, 2024 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
5,859——1,845,813Mar 28, 2024Apr 1, 2024 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
21,999——133,191Mar 28, 2024Apr 1, 2024 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
SALE
5,859——0Mar 28, 2024Apr 1, 2024 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
SALE
21,999——0Mar 28, 2024Apr 1, 2024 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASE
55,913——2,048,647Mar 28, 2024Apr 1, 2024 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASE
221,426——6,743,321Mar 28, 2024Apr 1, 2024 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
SALE
55,913——0Mar 28, 2024Apr 1, 2024 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
SALE
221,426——0Mar 28, 2024Apr 1, 2024 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
1,166,666$7.50$8.75M4,438,790Feb 16, 2024Feb 16, 2024 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
1,500$7,500.00$11.25M1,500Feb 16, 2024Feb 16, 2024 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASE
51,166——51,166Jan 29, 2024Jan 31, 2024 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
SALE
892,529——0Jan 29, 2024Jan 31, 2024 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
476,190$21.00$10.00M1,839,954Jan 22, 2024Jan 24, 2024 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASEGRANT
Stock grant
834,334$12.00$10.01M2,762,837Jan 22, 2024Jan 24, 2024 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASEGRANT
Stock grant
832,333$12.00$9.99M832,333Jan 22, 2024Jan 24, 2024 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
PURCHASE
406,038——406,038Dec 29, 2023Dec 29, 2023 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
SALE
3,435,480——0Dec 29, 2023Dec 29, 2023 ↗View →
SYRE
SPYRE THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
16,667$600.00$10.00M16,667Dec 7, 2023Dec 11, 2023 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASEGRANT
Stock grant
48,463$825.37$40.00M48,463Oct 30, 2023Nov 1, 2023 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASE
24,670$13.63$336.3K1,928,503Sep 29, 2023Oct 3, 2023 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASE
30,000$13.15$394.5K1,903,833Sep 26, 2023Sep 28, 2023 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASE
30,000$13.20$396.0K1,873,833Sep 19, 2023Sep 21, 2023 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASE
9,367$11.76$110.2K1,843,833Sep 13, 2023Sep 13, 2023 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASE
14,887$10.85$161.5K1,834,466Sep 12, 2023Sep 13, 2023 ↗View →
DNTH
DIANTHUS THERAPEUTICS, INC. /DE/
PURCHASEGRANT
Stock grant
6,500——6,500Sep 11, 2023Sep 13, 2023 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASE
55,913$17.00$950.5K55,913Jul 13, 2023Jul 17, 2023 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
47,758——47,758Jul 13, 2023Jul 17, 2023 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASE
1,992,734$17.00$33.88M1,992,734Jul 13, 2023Jul 17, 2023 ↗View →
APGE
APOGEE THERAPEUTICS, INC.
PURCHASE
892,529$17.00$15.17M892,529Jul 13, 2023Jul 17, 2023 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASE
800,000$12.00$9.60M3,272,124Jun 9, 2023Jun 13, 2023 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
425,531$23.50$10.00M1,363,764Aug 17, 2022Aug 19, 2022 ↗View →
COGT
COGENT BIOSCIENCES, INC.
PURCHASE
1,200,000$8.25$9.90M2,472,124Jun 16, 2022Jun 21, 2022 ↗View →
VRDN
VIRIDIAN THERAPEUTICS, INC.DE
PURCHASE
909,000$11.00$10.00M938,233Sep 21, 2021Sep 23, 2021 ↗View →
Other insiders · DNTH
Loading peer insiders…
About this filer
CIK 0001802528
ROLE
Director
PRIMARY
DNTH
COMPANIES
10
ACTIVE SINCE
Sep 2021
MARKETPEEL · /INSIDER/0001802528DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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