QT Imaging Holdings, Inc. (f/k/a GigCapital5, Inc. (GigCapital5)) (the Company or Combined Company or QT Imaging Holdings) consummated its business combination (the Business Combination) with QT Imaging, Inc. (QT Imaging) on March 4, 2024, pursuant to that certain Business Combination Agreement, dated as of December 8, 2022, by and among GigCapital5, QT Merger Sub, Inc. (Merger Sub), and QT Imaging (the Business Combination Agreement). Certain terms used in this Current Report on Form 8-K have the same meaning as set in the final proxy statement/prospectus (the Final Proxy Statement/Prospectus) filed with the Securities and Exchange Commission on February 7, 2024 by GigCapital5. The following persons are serving as executive officers and directors of the company upon the Closing, with Dr. John Klock and Stas Budagov having been named as executive officers effective upon the Closing on March 4, 2024, and each of the directors having been elected by the GigCapital5 stockholders to the board also upon the Closing on March 4, 2024.

Appointment of Dr. John Klock, 79, as Director; Dr. Avi S. Katz, 65, Chairman of the Board of Directors; Dr. Raluca Dinu, 50, Director, Ross Taylor, 60, Director; Daniel Dickson, 71, Director; Gerald McMorrow, 74, Director; Professor Zeev Weiner, 65, Director. Effective upon the Closing on February 28, 2024, Dr. Raluca Dinu and Brad Weightman resigned as executive officers of GigCapital5, and each of Raanan S. Horowitz, Karen Rogge, and Dorothy Hayes, following their not standing for re-election to the Board, resigned as directors of GigCapital5.