X0609 4 2026-08-11 0001084554 LIGHTBRIDGE Corp LTBR 0001641799 Tobin Mark Robert false C/O LIGHTBRIDGE CORPORATION 11710 PLAZA AMERICA DRIVE, SUITE 2000 RESTON VA 20190 1 0 0 0 0 Common Stock 2026-08-11 4 S 0 15000 8.99 D 66669 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.925 to $9.05, 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. /s/ Larry Goldman, Attorney-in-Fact for Mark R. Tobin 2026-08-12