SCHEDULE 13G/A 0001596029 XXXXXXXX LIVE 18 Common Stock, par value $1.00 per share 02/04/2025 0000205402 GRAYBAR ELECTRIC COMPANY, INC. 000000000 34 North Meramec Avenue Saint Louis MO 63105 Rule 13d-1(d) David A. Bender a X1 0 27776317 41056 0 27776317 N 83.4 IN Richard H. Harvey a X1 0 27776317 24576 0 27776317 N 83.4 IN Willam P. Mansfield a X1 0 27776317 45318 0 27776317 N 83.4 IN Kathleen M. Mazzarella a X1 0 27776317 134560 0 27776317 N 83.4 IN GRAYBAR ELECTRIC COMPANY, INC. 34 North Meramec Avenue, , Saint Louis, MISSOURI 63105 Trustees of Voting Trust established by Voting Trust Agreement dated as of March 3, 2017 (the "Voting Trust") c/o Graybar Electric Company, Inc. 34 North Meramec Avenue St. Louis, Missouri 63105 All persons named in response to Item 2(a) are citizens of the United States of America Y At December 31, 2024, 26,617,078 shares of Common Stock, par value $1.00 per share (the "Common Stock"), of Graybar Electric Company, Inc. ("Graybar") had been deposited in the Voting Trust and were held by the Voting Trustees. 1,159,239 shares have been acquired or will be acquired by means of the installment method under the 2024 stock offering and were or will be deposited into the Voting Trust. 83.4 0 27,776,317 David A. Bender 41,056 shares Richard H. Harvey 24,576 shares William P. Mansfield 45,318 shares Kathleen M. Mazzarella 134,560 shares 0 Y N All dividends payable with respect to shares of Common Stock deposited in the Voting Trust (or the Voting Trust Interests issued with respect thereto) are payable to the Voting Trustees as the owners of record of such shares. The Voting Trustees are authorized to retain, subject to the terms of the Voting Trust Agreement, any shares of Common Stock received as a stock dividend, and to deliver to each holder of Voting Trust Interests representing shares of Common Stock on which such stock dividend shall have been paid additional Voting Trust Interests for the number of shares received as a dividend with respect to such Common Stock. The Voting Trustees pay or cause to be paid to the holders of Voting Trust Interests an amount equal to any cash dividends and any distribution paid other than in cash or Common Stock. The Voting Trustees have no power to direct the sale or to receive the proceeds of a sale of the Common Stock deposited in the Voting Trust, such power being in the holders of the Voting Trust Interests issued in respect of such shares of Common Stock. Y Y Y Y Exhibit 99 - Joint Filing Agreement David A. Bender /s/ David A. Bender 02/04/2025 Richard H. Harvey /s/ Richard H. Harvey 02/04/2025 Willam P. Mansfield /s/ William P. Mansfield 02/04/2025 Kathleen M. Mazzarella /s/ Kathleen M. Mazzarella 02/04/2025