BLAIR WILLIAM & CO/IL

Position in MP — MP Materials Corp. / DE

CIK 902367 CHICAGO, IL

Position in MP

as of Mar 31, 2026 · filed May 8, 2026 Compact

Position Value

$602,815

-$109,971 QoQ

Shares Held

12,491

-11.5% QoQ

Ownership

0.007%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2022

14 quarters on record

Voting authority Sole 98% Shared 0% None 2%

Basic Materials · as of Mar 31, 2026

BLAIR WILLIAM & CO/IL holds $5,349,186 across 6 Other Industrial Metals & Mining names. MP ranks #4 (11.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	RIO	Rio Tinto PLC	22,132	$2,064,694
2	USAR	USA Rare Earth, Inc.	128,321	$1,942,138
3	BHP	BHP Group Ltd	8,421	$612,543
4	MP	MP Materials Corp. / DE This page	12,491	$602,815
5	NB	Niocorp Developments Ltd	14,330	$63,911
6	SLI	Standard Lithium Ltd.	18,500	$63,085

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$602,815	12,491	-11.5%	Shares	Sole	2026-05-08
2025-12-31	$712,786	14,109	+12.0%	Shares	Sole	2026-02-17
2025-09-30	$844,612	12,593	+83.2%	Shares	Sole	2025-11-12
2025-06-30	$228,697	6,874	-49.6%	Shares	Sole	2025-07-24
2024-12-31	$212,659	13,632	-54.1%	Shares	Sole	2025-02-12
2024-09-30	$523,887	29,682	0.0%	Shares	Sole	2024-11-12
2024-06-30	$377,851	29,682	-12.4%	Shares	Sole	2024-08-12
2024-03-31	$484,512	33,882	-38.1%	Shares	Sole	2024-05-09
2023-12-31	$1,086,271	54,724	+3.8%	Shares	Sole	2024-02-12
2023-09-30	$1,007,028	52,724	-27.5%	Shares	Sole	2023-11-09
2023-06-30	$1,663,925	72,724	+842.0%	Shares	Sole	2023-08-11
2023-03-31	$217,626	7,720	-45.2%	Shares	Sole	2023-05-12
2022-12-31	$342,080	14,089	+1.8%	Shares	Sole	2023-02-10
2022-09-30	$377,804	13,839	—	Shares	Sole	2022-11-09
No filing history on record for this holder in this stock.