MP MATERIALS CORP.

6 federal lobbying filings, 2025 to 2026.

MP MATERIALS CORP. is a client on 6 federal lobbying filings, 2025 to 2026, reporting $50K across them. Vertically integrated U.S. rare earth producer: mining, refining, magnets, recycling Based in Nevada.

An LDA filing reports one registrant’s income from one client for everything they worked that quarter, so a total here is the sum of whole filings and never a price for one issue or one bill.

Firms

2 it has hired, by filings.

Registrant	Filings	Reported
MP MATERIALS CORP.	4	—
PIONEER PUBLIC AFFAIRS	2	$50K

By year

Filings and what they reported, newest year first.

Year	Filings	Income	Expenses
2026	4	$50K	$320K
2025	2	—	$90K

Issues

The LDA issue codes the filings were filed under.

Code	Issue	Filings
`DEF`	Defense	5
`ENG`	Energy/Nuclear	4
`TAX`	Taxation/Internal Revenue Code	3
`TRD`	Trade (domestic/foreign)	3
`BAN`	Banking	2
`SMB`	Small Business	2
`NAT`	Natural Resources	1

Bills

The bills the filings name, by how many name them.

Bill	Title	Filings
H.R. 1496	Rare Earth Magnet Security Act of 2025	2
H.R. 7037	Developing Overseas Mineral Investments and New Allied Networks for Critical Energies Act	2
H.R. 7688	DPA Modernization Act of 2026	2

Lobbyists

Named on the filings.

Lobbyist	Clients	Filings
REBECCA ROSEN	1	3
ALEXANDER MCDONOUGH	1	2
CARIANNE LEE	1	2
JOSEPH BRITTON	1	2

Filings

The documents themselves, on the Senate’s Lobbying Disclosure site, newest first.

Client	Registrant	Period	Reported	Posted
MP MATERIALS CORP.	MP MATERIALS CORP.	2026 second_quarter	$230K	Jul 20, 2026
MP MATERIALS CORP.	PIONEER PUBLIC AFFAIRS	2026 second_quarter	$50K	Jul 16, 2026
MP MATERIALS CORP.	MP MATERIALS CORP.	2026 first_quarter	$90K	Apr 20, 2026
MP MATERIALS CORP.	PIONEER PUBLIC AFFAIRS	2026 second_quarter	—	Apr 7, 2026
MP MATERIALS CORP.	MP MATERIALS CORP.	2025 fourth_quarter	$90K	Jan 20, 2026
MP MATERIALS CORP.	MP MATERIALS CORP.	2025 fourth_quarter	—	Dec 5, 2025

Lobbying Finance