X0306 4 2018-07-06 0 0001103601 WGL HOLDINGS INC WGL 0001499721 Ford William R 101 CONSTITUTION AVENUE, NW WASHINGTON DC 20080 0 1 0 0 Vice President and CAO Common Stock 2018-07-06 4 A 0 4167 0.00 A 13512 D Common Stock 2018-07-06 4 D 0 13512 0.00 D 0 D This line reports vesting of performance shares under a plan exempt under Rule 16b-3. The vesting of the shares was accelerated as of the Effective Time as such term is defined in that certain Agreement and Plan of Merger by and among WGL Holdings, Inc. (the "Company"), AltaGas Ltd. and Wrangler, Inc. ("Wrangler"), dated January 25, 2017 (the "Merger Agreement"). Effective July 6, 2018, pursuant to the Merger Agreement, Wrangler merged with and into the Company, with the Company as the surviving entity (the "Merger"). Pursuant to the Merger, each share of Company common stock was converted into the right to receive $88.25 per share. /s/ William R. Ford, Jr., by Leslie T. Thornton, Attorney-in-fact 2018-07-10