Rock Springs Capital Management LP

Position in PEN — Penumbra Inc

CIK 1595725 Baltimore, MD

Position in PEN

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

Position Value

$36,548,062

-$3,020,523 QoQ

Shares Held

115,750

-3.9% QoQ

Ownership

0.294%

of shares outstanding

% of Portfolio

1.78%

of 13F equity value

Holder Rank

#56

of 446 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

Rock Springs Capital Management LP holds $146,094,606 across 10 Medical Devices names. PEN ranks #1 (25.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PEN	Penumbra Inc This page	115,750	$36,548,062
2	IRTC	iRhythm Holdings, Inc.	269,650	$32,074,867
3	DXCM	Dexcom Inc	343,000	$23,101,050
4	BSX	Boston Scientific Corp	528,500	$22,556,380
5	INSP	Inspire Medical Systems, Inc.	244,000	$10,884,840
6	SYK	Stryker Corp	29,000	$9,130,360
7	MOBI	Mobia Medical, Inc.	418,200	$5,603,880
8	ATEC	Alphatec Holdings, Inc.	360,000	$3,114,000

26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$36,548,062	115,750	-3.9%	Shares	Sole	2026-08-14
2026-03-31	$39,568,585	120,500	0.0%	Shares	Sole	2026-05-15
2025-12-31	$37,464,655	120,500	0.0%	Shares	Sole	2026-02-17
2025-09-30	$30,525,060	120,500	-6.2%	Shares	Sole	2025-11-14
2025-06-30	$32,976,955	128,500	-24.9%	Shares	Sole	2025-08-14
2025-03-31	$45,727,110	171,000	-28.7%	Shares	Sole	2025-05-15
2024-12-31	$56,995,200	240,000	-9.4%	Shares	Sole	2025-02-14
2024-09-30	$51,492,150	265,000	0.0%	Shares	Sole	2024-11-14
2024-06-30	$47,692,050	265,000	-47.5%	Shares	Sole	2024-08-14
2024-03-31	$112,705,900	505,000	-6.0%	Shares	Sole	2024-05-15
2023-12-31	$135,202,750	537,500	+6.7%	Shares	Sole	2024-02-14
2023-09-30	$121,862,162	503,750	+37.6%	Shares	Sole	2023-11-14
2023-06-30	$125,925,960	366,000	-15.6%	Shares	Sole	2023-08-14
2023-03-31	$120,812,115	433,500	-14.7%	Shares	Sole	2023-05-15
2022-12-31	$113,065,295	508,250	+6.8%	Shares	Sole	2023-02-14
2022-09-30	$90,249,600	476,000	+18.6%	Shares	Sole	2022-11-14
2022-06-30	$49,994,780	401,500	+96.3%	Shares	Sole	2022-08-15
2022-03-31	$45,425,585	204,500	+37.7%	Shares	Sole	2022-05-16
2021-12-31	$42,667,020	148,500	+0.7%	Shares	Sole	2022-02-14
2021-09-30	$39,308,750	147,500	0.0%	Shares	Sole	2021-11-15
2021-06-30	$40,423,850	147,500	0.0%	Shares	Sole	2021-08-16
2021-03-31	$39,910,550	147,500	-7.2%	Shares	Sole	2021-05-17
2020-12-31	$27,825,000	159,000	0.0%	Shares	Sole	2021-02-16
2020-09-30	$30,906,420	159,000	-23.2%	Shares	Sole	2020-11-16
2020-06-30	$37,015,740	207,000	-8.0%	Shares	Sole	2020-08-14
2020-03-31	$36,299,250	225,000	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.