Headwater Research LLC v. T-Mobile US, Inc. et al, No. 2:23-cv-00379 (E.D. Tex. Aug. 4, 2025)

From the Opinion

The passage below is extracted verbatim from the opening of the document. It has not been editorially summarized — consult the full opinion for the court's complete reasoning.

Before the Court is Plaintiff Headwater Research LLC’s Motion for Leave to Amend Exhibit List and to Serve Supplemental Expert Reports.1 Dkt. No. 360. In the Motion, Plaintiff seeks to add a term sheet created in the course of negotiations with Motorola Mobility LLC for a license related to the Motorola products that are part of the T -Mobile and Sprint systems accused of infringement in this case. Id. at 1; Dkt. No. 360-2. Untimely amendments to exhibit lists require a showing of good cause.