CollPlant Biotechnologies Ltd. Schedule 13D Amendment

The Schedule 13D amendment filed by The Waterproof Partnership, Ltd., The Loewenbaum 1992 Trust, The Loewenbaum Residence Trust FBO Anna Loewenbaum, and The Elizabeth Scott Loewenbaum 1992 Trust, collectively referred to as the Reporting Entities, along with individual filers George Walter Loewenbaum, Elizabeth S. Loewenbaum, Lilian S. Loewenbaum, Reginald J. Hargrove, and Nachum Shamir, discloses their collective ownership of 15.8% of CollPlant Biotechnologies Ltd.'s ordinary shares. The filing indicates that the Reporting Persons have not engaged in any transactions involving the ordinary shares since the initial Schedule 13D filing on September 30, 2025. The amendment also includes a letter from George Walter Loewenbaum to CollPlant's Board of Directors, requesting the appointment of Nachum Shamir as Chairman and suggesting the addition of other qualified individuals to the board. The Reporting Persons intend to review their investment in CollPlant and may take further actions depending on market conditions and other factors.