Rock Springs Capital Management LP

Position in MIRM — Mirum Pharmaceuticals, Inc.

CIK 1595725 Baltimore, MD

Back to MIRM Full portfolio

Position in MIRM

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

Position Value

$93,438,835

+$18,491,496 QoQ

Shares Held

798,145

-1.6% QoQ

Ownership

1.23%

of shares outstanding

% of Portfolio

4.56%

of 13F equity value

Holder Rank

#21

of 326 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in MIRM Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

Rock Springs Capital Management LP holds $1,502,002,537 across 70 Biotechnology names. MIRM ranks #4 (6.2% 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. This page	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

All Filings in MIRM

Export CSV

26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$93,438,835	798,145	-1.6%	Shares	Sole	2026-08-14
2026-03-31	$74,947,339	811,294	+6.4%	Shares	Sole	2026-05-15
2025-12-31	$60,213,603	762,294	+0.2%	Shares	Sole	2026-02-17
2025-09-30	$55,798,147	761,126	-7.0%	Shares	Sole	2025-11-14
2025-06-30	$41,638,503	818,206	-14.0%	Shares	Sole	2025-08-14
2025-03-31	$42,877,013	951,765	-35.3%	Shares	Sole	2025-05-15
2024-12-31	$60,849,171	1,471,564	-6.9%	Shares	Sole	2025-02-14
2024-09-30	$61,639,032	1,580,488	-10.8%	Shares	Sole	2024-11-14
2024-06-30	$60,585,979	1,772,038	-4.6%	Shares	Sole	2024-08-14
2024-03-31	$46,636,887	1,856,564	+0.3%	Shares	Sole	2024-05-15
2023-12-31	$54,655,217	1,851,464	+1.7%	Shares	Sole	2024-02-14
2023-09-30	$57,535,162	1,820,733	0.0%	Shares	Sole	2023-11-14
2023-06-30	$47,102,362	1,820,733	+1.4%	Shares	Sole	2023-08-14
2023-03-31	$43,133,506	1,795,733	0.0%	Shares	Sole	2023-05-15
2022-12-31	$35,016,793	1,795,733	0.0%	Shares	Sole	2023-02-14
2022-09-30	$37,728,350	1,795,733	+4.5%	Shares	Sole	2022-11-14
2022-06-30	$33,427,084	1,717,733	+3.1%	Shares	Sole	2022-08-15
2022-03-31	$36,689,900	1,666,208	+8.3%	Shares	Sole	2022-05-16
2021-12-31	$24,544,083	1,538,814	+0.9%	Shares	Sole	2022-02-14
2021-09-30	$30,390,410	1,525,623	+0.1%	Shares	Sole	2021-11-15
2021-06-30	$26,345,170	1,523,723	+1.4%	Shares	Sole	2021-08-16
2021-03-31	$29,785,496	1,502,800	+0.4%	Shares	Sole	2021-05-17
2020-12-31	$26,129,326	1,496,525	+12.7%	Shares	Sole	2021-02-16
2020-09-30	$25,583,121	1,327,614	+0.6%	Shares	Sole	2020-11-16
2020-06-30	$25,685,448	1,319,910	+6.2%	Shares	Sole	2020-08-14
2020-03-31	$17,402,000	1,243,000	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.