X0508 4 2025-12-23 0 0001682149 Datavault AI Inc. DVLT 0001755804 BRADLEY NATHANIEL T C/O DATA VAULT HOLDINGS INC. 48 WALL STREET, FLOOR 11 NEW YORK NY 10005 1 1 1 0 Chief Executive Officer 0 Common Stock 2025-12-23 4 S 0 31031 0.925 D 8508244 D Common Stock 2025-12-23 4 S 0 11987 0.925 D 4492957 I By Spouse Common Stock 12109002 I By EOS Technology Holdings Inc. Represents shares of common stock, par value $0.0001 per share ("Common Stock"), of the issuer sold to the open market by the issuer on behalf of the reporting person to satisfy tax obligations in connection with vesting of equity awards and was not a discretionary transaction by the reporting person. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $0.8913 to $0.9419. The reporting person and the spouse of the reporting person, Sonia Choi ("Ms. Choi") undertake to provide to the issuer, any shareholder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Mr. Bradley, as an officer and member of the board of directors of EOS Technology Holdings, Inc. ("EOS"), has the power to dispose of and the power to vote the shares of Common Stock beneficially owned by EOS. Mr. Bradley disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of such securities for purposes of Section 16 of the Exchange Act or for any other purposes. Represents shares of Common Stock of the issuer sold to the open market by the issuer on behalf of Ms. Choi to satisfy tax obligations in connection with vesting of equity awards and was not a discretionary transaction by Mr. Bradley or Ms. Choi. /s/ Nathaniel Bradley 2025-12-30