Rock Springs Capital Management LP

CIK

1595725

City

Baltimore

State / Country

Stock

AGIO — Agios Pharmaceuticals, Inc.

Top Portfolio Positions

98 positions · $1,690,777,301 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio
RVMD	Revolution Medicines, Inc. Healthcare	1,209,465	$117,620,471	6.96%
LLY	ELI LILLY & Co Healthcare	98,700	$90,781,299	5.37%
MDGL	Madrigal Pharmaceuticals, Inc. Healthcare	170,999	$89,512,846	5.29%
MIRM	Mirum Pharmaceuticals, Inc. Healthcare	811,294	$74,947,339	4.43%
ARGX	Argenx SE Healthcare	98,500	$71,929,625	4.25%
RYTM	Rhythm Pharmaceuticals, Inc. Healthcare	689,748	$59,987,383	3.55%
INSM	INSMED Inc Healthcare	314,300	$51,394,336	3.04%
ASND	Ascendis Pharma A/S Healthcare	194,000	$44,373,620	2.62%
XENE	Xenon Pharmaceuticals Inc. Healthcare	763,020	$44,369,613	2.62%
TVTX	Travere Therapeutics, Inc. Healthcare	1,477,954	$43,910,013	2.60%

25 quarters · across all stocks

25 quarters on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$27,035,684	799,163	0.0%	Shares	Sole	2026-05-15
2025-12-31	$21,753,216	799,163	-16.6%	Shares	Sole	2026-02-17
2025-09-30	$38,475,875	958,542	-3.2%	Shares	Sole	2025-11-14
2025-06-30	$32,918,918	989,745	+189.2%	Shares	Sole	2025-08-14
2025-03-31	$10,025,874	342,180	-27.4%	Shares	Sole	2025-05-15
2024-12-31	$15,479,885	471,086	-32.6%	Shares	Sole	2025-02-14
2024-09-30	$31,073,853	699,389	-33.0%	Shares	Sole	2024-11-14
2024-06-30	$45,028,534	1,044,261	-40.8%	Shares	Sole	2024-08-14
2024-03-31	$51,594,126	1,764,505	-18.0%	Shares	Sole	2024-05-15
2023-12-31	$47,928,892	2,152,173	-20.6%	Shares	Sole	2024-02-14
2023-09-30	$67,074,009	2,710,061	+0.9%	Shares	Sole	2023-11-14
2023-06-30	$76,072,249	2,686,167	+0.9%	Shares	Sole	2023-08-14
2023-03-31	$61,137,066	2,661,605	-11.2%	Shares	Sole	2023-05-15
2022-12-31	$84,144,303	2,996,592	-2.0%	Shares	Sole	2023-02-14
2022-09-30	$86,476,535	3,057,869	+4.4%	Shares	Sole	2022-11-14
2022-06-30	$64,923,913	2,928,458	+9.9%	Shares	Sole	2022-08-15
2022-03-31	$77,586,155	2,665,275	+0.7%	Shares	Sole	2022-05-16
2021-12-31	$86,994,563	2,646,625	+3.5%	Shares	Sole	2022-02-14
2021-09-30	$117,967,660	2,556,179	-0.7%	Shares	Sole	2021-11-15
2021-06-30	$141,870,113	2,574,308	+1.2%	Shares	Sole	2021-08-16
2021-03-31	$131,351,504	2,543,600	+0.8%	Shares	Sole	2021-05-17
2020-12-31	$109,344,164	2,523,521	+59.6%	Shares	Sole	2021-02-16
2020-09-30	$55,352,815	1,581,509	+34.1%	Shares	Sole	2020-11-16
2020-06-30	$63,091,425	1,179,720	+11.8%	Shares	Sole	2020-08-14
2020-03-31	$37,449,140	1,055,500	—	Shares	Sole	2020-05-15
No 13F history on record for this holder in this stock.