X0206 3 2025-09-29 0 0002042292 BTC Development Corp. BDCI 0001168754 COHEN BETSY Z 2929 ARCH STREET SUITE 1703 PHILADELPHIA PA 19104 true true Class A Ordinary Shares 512500 I By BTC Development Sponsor LLC Class B Ordinary Shares Class A Ordinary Shares 4590334 I By BTC Development Sponsor LLC Warrants 11.5 Class A Ordinary Shares 128125 I By BTC Development Sponsor LLC Class B Ordinary Shares Class A Ordinary Shares 4095833 I By BTC Development Advisors LLC These shares underlie 512,500 units of the issuer that BTC Development Sponsor LLC has irrevocably committed to purchase. The reporting person disclaims beneficial ownership of these securities, except to the extent of her pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for any other purpose. These shares are held directly by the issuer's sponsors, BTC Development Sponsor LLC and BTC Development Advisors LLC, which are managed by the reporting person. The Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the issuer's initial business combination, or at any time and from time to time at the option of the holder, on a one-for-one basis, subject to certain adjustments described in the issuer's charter documents and have no expiration date. The warrants will become exercisable at the later of 30 days after the consummation of the issuer's initial business combination or 12 months from the completion of the issuer's initial public offering. The warrants will expire five years after the consummation of the issuer's initial business combination or earlier upon redemption of all of the issuer's outstanding Class A ordinary shares or the issuer's liquidation. These warrants underlie 512,500 units of the issuer that BTC Development Sponsor LLC has irrevocably committed to purchase. Includes up to 1,100,000 shares that are subject to forfeiture in the event the underwriters of the issuer's initial public offering do not exercise in full their over-allotment option. Exhibit 24 - Power of Attorney /s/ R. Maxwell Smeal, Attorney-in-fact 2025-09-30