HUMPTON BARBARA (Chief Executive Officer) sold 40.3% of their position (88.39K shares) of USA RARE EARTH, INC. on the open market

Open‑market sale worth $1.22M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

HUMPTON BARBARA

Filed: 10/6/2026ACC: 0001790041-26-000003

InsiderHUMPTON BARBARACIK 1790041

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IssuerUSA RARE EARTH, INC.CIK 1970622

DirectorOfficer· Chief Executive Officer

Since Oct 2025

-88.39K

Net shares

Net seller

$1.22M

Total sold

Open market trades

0B · 1S

Total transactions

219.33K acquired · 307.72K disposed

Non-Derivative Transactions4

Common Stock, par value $0.0001 per share

Direct

M · Option Exercise

+83.55K

Price / share

$13.80

Trade value

$1.15M

% of position

New position

10/1/2026

0.00→83.55K

Common Stock, par value $0.0001 per share

Direct

M · Option Exercise

+104.44K

Price / share

$13.80

Trade value

$1.44M

% of position

125.0%

10/1/2026

83.55K→188K

Common Stock, par value $0.0001 per share

Direct

M · Option Exercise

+31.33K

Price / share

$13.80

Trade value

$432.40K

% of position

16.7%

10/1/2026

188K→219.33K

Common Stock, par value $0.0001 per share

Direct

S · Sale

−88.39K

Price / share

$13.75

Trade value

$1.22M

% of position

40.3%

10/2/2026

219.33K→130.94K

Total

Net shares

+130.94K

Net value

$1.81M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock, par value $0.0001 per share Direct	10/1/2026	M · Option Exercise	+83.55K	$13.80	$1.15M	New position	0.00	83.55K
Common Stock, par value $0.0001 per share Direct	10/1/2026	M · Option Exercise	+104.44K	$13.80	$1.44M	125.0%	83.55K	188K
Common Stock, par value $0.0001 per share Direct	10/1/2026	M · Option Exercise	+31.33K	$13.80	$432.40K	16.7%	188K	219.33K
Common Stock, par value $0.0001 per share Direct	10/2/2026	S · Sale	−88.39K	$13.75	$1.22M	40.3%	219.33K	130.94K
Total			+130.94K		$1.81M

Derivative Transactions3

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock, par value $0.0001 per share

83.55K shares

−83.55K

Strike price

Held after

167.11K

Exercisable

—

10/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock, par value $0.0001 per share

104.44K shares

−104.44K

Strike price

Held after

208.88K

Exercisable

—

10/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock, par value $0.0001 per share

31.33K shares

−31.33K

Strike price

Held after

31.33K

Exercisable

—

10/1/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Common Stock, par value $0.0001 per share83.55K shares	10/1/2026	M · Option Exercise	−83.55K	—	167.11K
Restricted Stock Units Direct	Common Stock, par value $0.0001 per share104.44K shares	10/1/2026	M · Option Exercise	−104.44K	—	208.88K
Restricted Stock Units Direct	Common Stock, par value $0.0001 per share31.33K shares	10/1/2026	M · Option Exercise	−31.33K	—	31.33K