ARDSLEY ADVISORY PARTNERS LP

Position in MP — MP Materials Corp. / DE

CIK 900529 Norwalk, CT

Position in MP

as of Jun 30, 2026 · filed Jul 13, 2026 Compact

Position Value

$280,050

-$443,850 QoQ

Shares Held

5,000

-66.7% QoQ

Ownership

0.003%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

#25

of 61 holders

Holding Since

Dec 2020

11 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Basic Materials · as of Jun 30, 2026

ARDSLEY ADVISORY PARTNERS LP holds $11,912,350 across 5 Other Industrial Metals & Mining names. MP ranks #4 (2.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	GSM	Ferroglobe PLC	2,185,000	$6,948,300
2	SKE	Skeena Resources Ltd	145,000	$3,865,700
3	NB	Niocorp Developments Ltd	125,000	$602,500
4	MP	MP Materials Corp. / DE This page	5,000	$280,050
5	USAR	USA Rare Earth, Inc.	10,000	$215,800

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$280,050	5,000	-66.7%	Shares	Sole	2026-07-13
2026-03-31	$723,900	15,000	-84.2%	Shares	Sole	2026-05-15
2025-06-30	$3,160,650	95,000	-56.8%	Shares	Sole	2025-08-14
2025-03-31	$5,370,200	220,000	-4.3%	Shares	Sole	2025-05-15
2024-12-31	$3,588,000	230,000	+318.2%	Shares	Sole	2025-02-14
2024-09-30	$970,750	55,000	+266.7%	Shares	Sole	2024-11-14
2024-06-30	$190,950	15,000	+50.0%	Shares	Sole	2024-08-14
2024-03-31	$143,000	10,000	-96.3%	Shares	Sole	2024-05-15
2023-03-31	$7,616,938	270,200	+168.2%	Shares	Sole	2023-05-15
2022-12-31	$2,446,210	100,750	+6.1%	Shares	Sole	2023-02-14
2020-12-31	$3,056,150	95,000	—	Shares	Sole	2021-02-16
No filing history on record for this holder in this stock.