Transaction Details

Footnotes

Shares were granted pursuant to the Unitil Corporation Third Amended and Restated 2003 Stock Plan. Shares generally will vest 25% per year over four years from date of grant. Shares will be valued at current market price on date of vesting. | Shares were granted pursuant to the Unitil Corporation Third Amended and Restated 2003 Stock Plan. Shares generally will vest after three-year performance period based on the attainment of certain performance thresholds of certain performance goals. Shares will be valued at current market price on date of vesting. | Shares were granted pursuant to the Unitil Corporation Third Amended and Restated 2003 Stock Plan. Shares were granted at the conclusion of 2023-2025 performance period based on the attainment of certain performance thresholds of certain performance goals. Shares were valued at current market price on date of grant. The balance of the contingent grant for such performance period terminated. | Includes 211.965 shares of common stock acquired on February 28, 2025, 224.671 shares of common stock acquired on May 30, 2025, 258.497 shares of common stock acquired on August 28, 2025 and 249.233 shares of common stock acquired on November 28, 2025, in each case resulting from the reinvestment of dividends pursuant to Unitil Corporation's Dividend reinvestment and Stock Purchase Plan. | Shares may be granted pursuant to the Unitil Corporation Third Amended and Restated 2003 Stock Plan. Any such shares would be granted after a three-year performance period ending on December 31, 2028, based on the attainment of certain performance thresholds of certain performance goals. Any such shares would be valued at current market price on date of grant.