LTBR

The reported sale of 1,143 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.24 to $9.31, 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.

The reported sale of 1,116 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.24 to $9.31, 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.

The reported sale of 1,116 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.56 to $9.68, 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.

Shares withheld to cover taxes upon the vesting of performance-based restricted stock awards. No shares were sold.

Shares withheld to cover taxes upon the vesting of performance-based restricted stock awards. No shares were sold.

Shares withheld to cover taxes upon the vesting of performance-based restricted stock awards. No shares were sold.

The reported sale of an aggregate of 30,289 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 30, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.12 to $17.115, 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.

The reported sale of an aggregate of 30,289 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 30, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.13 to $18.12, 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.

The reported sale of an aggregate of 30,289 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 30, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.9076 to $16.1108, 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.

The reported sales of an aggregate of 8,869 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.00 to $18.30, 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.

The reported sales of an aggregate of 8,869 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.00 to $18.0012. 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.

The reported sale of 1,449 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 14, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.91 to $17.01, 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.

The reported sale of 1,245 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.65 to $15.7012, 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.

Represents an equity grant, which vests equally in four installments on March 31, 2026, June 30, 2026, September 30, 2026 and December 31, 2026, subject to the reporting person's continued service on each such vesting date.

Represents an equity grant, which vests equally in four installments on March 31, 2026, June 30, 2026, September 30, 2026 and December 31, 2026, subject to the reporting person's continued service on each such vesting date.

Represents an equity grant, which vests equally in four installments on March 31, 2026, June 30, 2026, September 30, 2026 and December 31, 2026, subject to the reporting person's continued service on each such vesting date.

Represents an equity grant, which vests equally in four installments on March 31, 2026, June 30, 2026, September 30, 2026 and December 31, 2026, subject to the reporting person's continued service on each such vesting date.

The reported sale of 1,947 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 21, 2025.

Represents an equity grant, which vests equally in four installments on March 31, 2026, June 30, 2026, September 30, 2026 and December 31, 2026, subject to the reporting person's continued service on each such vesting date.

The reported sale of 5,451 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2025.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

The reported sale of 8,030 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.39 to $17.905, 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.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

Represents a grant of restricted stock awards. The restricted stock awards will vest in three equal parts, beginning on the first anniversary of the date of grant, over the next three years.

Represents a grant of restricted stock awards. The restricted stock awards will vest in three equal parts, beginning on the first anniversary of the date of grant, over the next three years.

The reported sale of 1,948 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.30 to $15.815, 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.

Represents a grant of restricted stock awards. The restricted stock awards will vest in three equal parts, beginning on the first anniversary of the date of grant, over the next three years.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

The reported sale of 4,527 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.12 to $15.315, 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.

Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

The reported sale of 1,948 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.2975 to $27.195, 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.

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.

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.

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.

This option is fully vested as of the date of this report.

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.

The reported exercise of 20,600 employee stock options and sale of 20,600 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.80 to $26.58, 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.

The reported exercise of 20,600 employee stock options and sale of 20,600 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

This option is fully vested as of the date of this report.

The reported exercise of 20,600 employee stock options and sale of 20,600 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

The reported exercise of 7,616 employee stock options and sale of 7,616 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

This option is fully vested as of the date of this report.

The reported exercise of 7,616 employee stock options and sale of 7,616 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.80 to $25.92, 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.

The reported exercise of 25,093 employee stock options and sale of 25,093 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 13, 2024.

This option is fully vested as of the date of this report.

The reported exercise of 25,093 employee stock options and sale of 25,093 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 13, 2024.

The reported exercise of 7,616 employee stock options and sale of 7,616 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

The reported exercise of 25,093 employee stock options and sale of 25,093 shares of common stock were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 13, 2024.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.19, 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.

The reported sale of 1,246 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 21, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.8325 to $22.93, 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.

The reported sale of 1,448 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 14, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in two transactions at prices of $22.6687 and $22.68. 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.