Rock Springs Capital Management LP

Position in ARDX — Ardelyx, Inc.

CIK 1595725 Baltimore, MD

Position in ARDX

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$13,773,843

+$367,916 QoQ

Shares Held

2,299,473

0.0% QoQ

Ownership

0.931%

of shares outstanding

% of Portfolio

0.81%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Mar 31, 2026

Rock Springs Capital Management LP holds $1,246,050,197 across 66 Biotechnology names. ARDX ranks #30 (1.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	RVMD	Revolution Medicines, Inc.	1,209,465	$117,620,471
2	MDGL	Madrigal Pharmaceuticals, Inc.	170,999	$89,512,846
3	MIRM	Mirum Pharmaceuticals, Inc.	811,294	$74,947,339
4	ARGX	Argenx SE	98,500	$71,929,625
5	RYTM	Rhythm Pharmaceuticals, Inc.	689,748	$59,987,383
6	INSM	INSMED Inc	314,300	$51,394,336
7	ASND	Ascendis Pharma A/S	194,000	$44,373,620
8	XENE	Xenon Pharmaceuticals Inc.	763,020	$44,369,613

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$13,773,843	2,299,473	0.0%	Shares	Sole	2026-05-15
2025-12-31	$13,405,927	2,299,473	+0.6%	Shares	Sole	2026-02-17
2025-09-30	$12,597,364	2,286,273	0.0%	Shares	Sole	2025-11-14
2025-06-30	$8,962,190	2,286,273	+42.4%	Shares	Sole	2025-08-14
2025-03-31	$7,880,427	1,604,975	+9.7%	Shares	Sole	2025-05-15
2024-12-31	$7,420,599	1,463,629	-72.1%	Shares	Sole	2025-02-14
2021-06-30	$39,786,123	5,248,829	+1.4%	Shares	Sole	2021-08-16
2021-03-31	$34,268,833	5,176,561	+0.6%	Shares	Sole	2021-05-17
2020-12-31	$33,308,284	5,148,112	+1.4%	Shares	Sole	2021-02-16
2020-09-30	$26,653,551	5,076,867	+1.2%	Shares	Sole	2020-11-16
2020-06-30	$34,704,554	5,015,109	+3.4%	Shares	Sole	2020-08-14
2020-03-31	$27,572,250	4,850,000	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.