Rock Springs Capital Management LP

Position in CYTK — Cytokinetics Inc

CIK 1595725 Baltimore, MD

Position in CYTK

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$16,014,016

+$13,024,075 QoQ

Shares Held

187,980

+314.4% QoQ

Ownership

0.135%

of shares outstanding

% of Portfolio

0.78%

of 13F equity value

Holder Rank

#101

of 477 holders

Holding Since

Jun 2020

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

Rock Springs Capital Management LP holds $1,502,002,537 across 70 Biotechnology names. CYTK ranks #29 (1.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	RVMD	Revolution Medicines, Inc.	1,105,210	$206,983,728
2	TVTX	Travere Therapeutics, Inc.	2,179,069	$123,792,909
3	MDGL	Madrigal Pharmaceuticals, Inc.	174,999	$93,965,713
4	MIRM	Mirum Pharmaceuticals, Inc.	798,145	$93,438,835
5	RYTM	Rhythm Pharmaceuticals, Inc.	692,598	$76,899,155
6	KYMR	Kymera Therapeutics, Inc.	453,156	$51,963,398
7	ARGX	Argenx SE	52,750	$48,939,867
8	ASND	Ascendis Pharma A/S	168,750	$45,009,000

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$16,014,016	187,980	+314.4%	Shares	Sole	2026-08-14
2026-03-31	$2,989,941	45,364	+26.5%	Shares	Sole	2026-05-15
2025-12-31	$2,278,099	35,853	-82.6%	Shares	Sole	2026-02-17
2024-09-30	$10,882,502	206,108	+53.5%	Shares	Sole	2024-11-14
2023-09-30	$3,955,063	134,252	-70.0%	Shares	Sole	2023-11-14
2023-06-30	$14,600,712	447,600	0.0%	Shares	Sole	2023-08-14
2023-03-31	$15,751,044	447,600	+1.0%	Shares	Sole	2023-05-15
2022-12-31	$20,298,260	443,000	0.0%	Shares	Sole	2023-02-14
2022-09-30	$21,463,350	443,000	+10.8%	Shares	Sole	2022-11-14
2022-06-30	$15,716,000	400,000	+93.7%	Shares	Sole	2022-08-15
2020-09-30	$4,470,616	206,495	+166.7%	Shares	Sole	2020-11-16
2020-06-30	$1,824,718	77,417	—	Shares	Sole	2020-08-14
No filing history on record for this holder in this stock.