GRAE SETH (President and CEO) sold 2.7% of their position (20.60K shares) of LIGHTBRIDGE CORP on the open market

Open‑market sale worth $535.8K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

GRAE SETH

Filed: 10/14/2025ACC: 0000891839-25-000077

InsiderGRAE SETHCIK 1357549

→

IssuerLIGHTBRIDGE CORPCIK 1084554

DirectorOfficer· President and CEO

Since Aug 2018

-20.60K

Net shares

Net seller

$535.8K

Total sold

Open market trades

0B · 1S

Total transactions

20.60K acquired · 41.20K disposed

Non-Derivative Transactions2

Common Stock

Direct

M · Option Exercise

+20.60K

Price / share

$10.80

Trade value

$222.48K

% of position

2.7%

10/13/2025

753.32K→773.92K

Common Stock

Direct

S · Sale

−20.60K

Price / share

$26.01

Trade value

$535.81K

% of position

2.7%

10/13/2025

773.92K→753.32K

Total

Net shares

+0.00

Net value

-$313.33K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	10/13/2025	M · Option Exercise	+20.60K	$10.80	$222.48K	2.7%	753.32K	773.92K
Common Stock Direct	10/13/2025	S · Sale	−20.60K	$26.01	$535.81K	2.7%	773.92K	753.32K
Total			+0.00		-$313.33K

Derivative Transactions1

Employee Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common Stock

20.60K shares

−20.60K

Strike price

10.8

Held after

0.00

Exercisable

—

10/13/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Employee Stock Option (right to buy) Direct	Common Stock20.60K shares	10/13/2025	M · Option Exercise	−20.60K	10.8	—	0.00

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

Derivative Holdings (Post-Transaction)3

Employee Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

18.20K

Shares owned

18.20K

Exercise price

18.48

Expiration

—

Exercise window

—

Employee Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

17.43K

Shares owned

17.43K

Exercise price

55.2

Expiration

—

Exercise window

—

Employee Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

40.23K

Shares owned

40.23K

Exercise price

12.6

Expiration

—

Exercise window

—

Total

Underlying

75.86K

Owned

75.86K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Employee Stock Option (right to buy) Direct	Common Stock	18.48	—	—	18.20K	18.20K
Employee Stock Option (right to buy) Direct	Common Stock	55.2	—	—	17.43K	17.43K
Employee Stock Option (right to buy) Direct	Common Stock	12.6	—	—	40.23K	40.23K
Total					75.86K	75.86K