X0508 4 2026-02-05 0 0002043630 StoneBridge Acquisition II Corp APAC 0002089984 BP SPAC Sponsor II LLC ONE WORLD TRADE CENTER, SUITE 8500 NEW YORK NY 10007 0 0 1 0 0 Class B Ordinary Shares 2026-02-05 4 A 0 100000 D Class A Ordinary Shares 100000 991667 I See footnote On, and effective, February 5, 2026, the board of directors (the "Board") of StoneBridge Acquisition II Corporation (the "Issuer") approved an equity grant of 100,000 Class B Ordinary Shares of the Issuer to four independent members of the Board for their respective services as members of the Board and committees of the Board. The Class B Shares were transferred by and from the Issuer's sponsor, StoneBridge Acquisition Sponsor II LLC (the "Sponsor"), to the four independent members of the Board. The Class B Ordinary Shares will automatically convert into Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to certain adjustments and have no expiration date. The shares were, and are, as applicable, directly held by the Sponsor. The reporting person is the sole managing member of the Sponsor. Bhargav Marepally and Prabhu Antony are the managing members of the reporting person, and have voting and investment discretion with respect to the Class B Ordinary Shares held directly by the Sponsor. Each of Mr. Marepally and Mr. Antony disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest each may have therein, directly or indirectly. /s/ Bhargava Marepally, as Managing Member of BP SPAC Sponsor II LLC 2026-02-06