X0202 SCHEDULE 13G/A 0000803012-26-000007 0000803012 XXXXXXXX LIVE 1 Class A ordinary shares, par value $0.0001 per share 03/31/2026 0002042292 BTC Development Corp. G0701G109 2929 ARCH STREET, SUITE 1703 PHILADELPHIA PA 19104 Rule 13d-1(b) TD SECURITIES (USA) LLC DE 495100 0 495100 0 495100 N 1.9 BD Toronto Dominion Holdings USA Inc. DE 0 0 0 0 0 N 0 HC TD Group US Holdings LLC DE 0 0 0 0 0 N 0 HC Toronto Dominion Bank Z4 1200000 0 1200000 0 1200000 N 4.6 FI BTC Development Corp. 2929 ARCH STREET, SUITE 1703, PHILADELPHIA, PENNSYLVANIA 19104 TD SECURITIES (USA) LLC Toronto Dominion Holdings USA Inc. TD Group US Holdings LLC Toronto Dominion Bank ONE VANDERBILT AVENUE NEW YORK, New York 10017 The address of TD Securities (USA) LLC's ("TDS") principal office and Toronto Dominion Holdings (U.S.A.), Inc.'s ("TDH") principal office is One Vanderbilt Avenue, New York, New York 10017. The address of TD Group US Holdings LLC's ("TD GUS") principal office is 251 Little Falls Drive, Wellington, Delaware 19808. The address of Toronto Dominion Bank's ("TD Bank") principal office is Toronto-Dominion Centre, 66 Wellington Street West, 12th Floor, TD Tower, Toronto, Ontario, Canada M5K 1A2. TD SECURITIES (USA) LLC - DELAWARE Toronto Dominion Holdings USA Inc. - DELAWARE TD Group US Holdings LLC - DELAWARE Toronto Dominion Bank - CANADA (FEDERAL LEVEL) N BD HC FI Bank 1,695,100 TDS has the sole power to vote or direct the vote and the sole power to dispose or direct the disposition of 495,100 of these shares and TD Bank has the sole power to vote or direct the vote and the sole power to dispose or direct the disposition of 1,200,000 of these shares. This schedule is jointly filed by TDS, TDH, TD GUS and TD Bank. TDH is the sole owner of TDS. TD GUS is the sole owner of TDH. TD Bank is the sole owner of TD GUS. TDH, TD GUS and TD Bank may be deemed to hold an indirect interest in the shares reported herein by TDS by virtue of their ownership of TDS. Each of TDH, TD GUS and TD Bank disclaims ownership of the shares reported herein by TDS except to the extent of its pecuniary interest therein. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer. 6.5 TD SECURITIES (USA) LLC - 495,100 Toronto Dominion Holdings USA Inc. - 0 TD Group US Holdings LLC - 0 Toronto Dominion Bank - 1,200,000 TD SECURITIES (USA) LLC - 0 Toronto Dominion Holdings USA Inc. - 0 TD Group US Holdings LLC - 0 Toronto Dominion Bank - 0 TD SECURITIES (USA) LLC - 495,100 Toronto Dominion Holdings USA Inc. - 0 TD Group US Holdings LLC - 0 Toronto Dominion Bank - 1,200,000 TD SECURITIES (USA) LLC - 0 Toronto Dominion Holdings USA Inc. - 0 TD Group US Holdings LLC - 0 Toronto Dominion Bank - 0 Y Y N TD Securities (USA) LLC Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit I JOINT FILING AGREEMENT This will confirm the agreement by and among the undersigned that the Schedule 13G filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the ordinary shares of BTC Development Corp. will be filed on behalf of each of the persons and entities named below in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. May 15, 2026 TD SECURITIES (USA) LLC By: /s/ Christina Petrou Title: Executive Vice President & Chief Operating Officer TORONTO DOMINION HOLDINGS USA INC. By: /s/ Christina Petrou Title: Executive Vice President & Chief Operating Officer TD GROUP US HOLDINGS LLC By: /s/ Andre Ramos Title: US Chief Financial Officer THE TORONTO-DOMINION BANK By: /s/ Christina Petrou Title: Executive Vice President & Chief Operating Officer TD SECURITIES (USA) LLC Christina Petrou 05/15/2026 Toronto Dominion Holdings USA Inc. Christina Petrou 05/15/2026 TD Group US Holdings LLC Andre Ramos 05/15/2026 Toronto Dominion Bank Christina Petrou 05/15/2026