GRAE SETH 4

4 · LIGHTBRIDGE Corp · Filed Oct 15, 2025

Form 4

Period: 2025-10-15

DirectorPresident and CEO

Transactions

Exercise/Conversion
Common Stock
2025-10-15$12.60/sh+32,296$406,930→ 785,612 total
Sale
Common Stock
2025-10-15$28.07/sh−32,296$906,549→ 753,316 total
Exercise/Conversion
Employee Stock Option (right to buy)
2025-10-15−32,296→ 7,937 total
Exercise: $12.60Exp: 2027-10-26→ Common Stock (32,296 underlying)

Holdings

Employee Stock Option (right to buy)
Exercise: $55.20Exp: 2025-11-20→ Common Stock (17,430 underlying)
17,430
Employee Stock Option (right to buy)
Exercise: $18.48Exp: 2026-11-09→ Common Stock (18,199 underlying)
18,199

Footnotes (3)

[F1]The reported exercise of 32,296 employee stock options and sale of 32,296 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.
[F2]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.00 to $28.28, inclusive. The reporting person undertakes to provide to Lightbridge Corporation, any security holder of Lightbridge Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
[F3]This option is fully vested as of the date of this report.

Documents

1 file