ESE: Material agreement · Termination of an agreement · Acquisition or asset disposal · New financial obligation · Leadership change

Item 1.01 Entry into a Material Definitive Agreement The information set forth under Item 2.01 of this Current Report on Form 8-K related to the entry into the Shareholder Agreement (as defined below) and Item 2.03 of this Current Report on Form 8-K related to the entry into the New Credit Agreement (as defined below) is incorporated herein by reference. Item 1.02 Termination of a Material Definitive Agreement Upon the effectiveness of the New Credit Agreement, the Existing Credit Agreement (as defined below) was terminated. The Existing Credit Agreement had been scheduled to mature by its terms on August 30, 2028. Item 2.01 Completion of Acquisition or Disposition of Assets On October 1, 2026 (the “ Closing Date ”), ESCO Technologies Inc., a Missouri corporation (the “ Registrant ”), completed its previously announced purchase of the entire issued share capital of Megger Group Limited, a company incorporated in England and Wales (the “ Company ,” and such transaction, the “ Transaction ”), pursuant to a share purchase agreement dated April 15, 2026 (the “ Purchase Agreement ”) with TBG AG, a Swiss stock corporation (the “ Seller ”). The aggregate cash and stock consideration paid by the Registrant to Seller was approximately $2.3 billion, consisting of $922 million in cash and 5.10 million shares (the “ Consideration Shares ”) of the Registrant’s common stock, par value $0.01 per share (the “ Common Stock ”). The purchase price is subject to a post-closing adjustment based on the net debt and working capital of the Company, with such adjustment payable in cash. This summary of the Purchase Agreement does not purport to be complete and is qualified in its entirety by reference to the full text thereof, a copy of which was attached as Exhibit 10.1 to the Registrant’s For