X0306 4 2023-01-24 0 0000755001 UNITIL CORP UTL 0001248881 WHITNEY SANDRA L 6 LIBERTY LANE WEST HAMPTON NH 03842 0 1 0 0 Corporate Secretary Common stock, no par value 2023-01-24 4 A 0 220 0.00 A 0 D Common stock, no par value 2023-01-24 4 A 0 220 0.00 A 3063.731 D Common stock, no par value 34.459 I Held in trust Contingent grant of common stock 2023-01-24 4 A 0 110 A Common stock 110 110 D Shares were granted pursuant to the Unitil Corporation Second 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 Second 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. Includes 20.367 shares of common stock acquired on February 25, 2022, 17.766 shares of common stock acquired on May 27, 2022, 18.182 shares of common stock acquired on August 26, 2022 and 19.226 shares of common stock acquired on November 28, 2022, in each case resulting from the reinvestment of dividends pursuant to Unitil Corporation's Dividend reinvestment and Stock Purchase Plan. Shares were held in trust under the terms of the Unitil Corporation Tax Deferred Savings and Investment Plan. Shares may be granted pursuant to the Unitil Corporation Second Amended and Restated 2003 Stock Plan. Any such shares would be granted after a three-year performance period 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. /s/ Sandra L. Whitney 2023-01-26