Rock Springs Capital Management LP

Position in JSPR — Jasper Therapeutics, Inc.

CIK 1595725 Baltimore, MD

Position in JSPR

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

Position Value

$964,235

-$1,050,093 QoQ

Shares Held

1,100,726

0.0% QoQ

Ownership

3.93%

of shares outstanding

% of Portfolio

0.06%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2024

9 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. JSPR ranks #62 (0.1% 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

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$964,235	1,100,726	0.0%	Shares	Sole	2026-05-15
2025-12-31	$2,014,328	1,100,726	0.0%	Shares	Sole	2026-02-17
2025-09-30	$2,619,727	1,100,726	+101.9%	Shares	Sole	2025-11-14
2025-06-30	$3,025,699	545,171	0.0%	Shares	Sole	2025-08-14
2025-03-31	$2,344,235	545,171	+17.7%	Shares	Sole	2025-05-15
2024-12-31	$9,900,821	463,088	+0.9%	Shares	Sole	2025-02-14
2024-09-30	$8,635,445	459,088	+13.5%	Shares	Sole	2024-11-14
2024-06-30	$9,178,404	404,335	0.0%	Shares	Sole	2024-08-14
2024-03-31	$11,871,275	404,335	—	Shares	Sole	2024-05-15
No filing history on record for this holder in this stock.