Form 3 - Initial statement of beneficial ownership of securities

POWER OF ATTORNEY

Know all by these presents that Marcin Urbaszek, does hereby make, constitute

and appoint each of Katharine A. Keenan, Scott Mathias and Anthony F. Marone,

Jr., or any one of them, as a true and lawful attorney-in-fact of the

undersigned with full powers of substitution and revocation, for and in the

name, place and stead of the undersigned (in the undersigned's individual

capacity), to execute and deliver such forms that the undersigned may be

required to file with the U.S. Securities and Exchange Commission as a

result of the undersigned's ownership of or transactions in securities of

Blackstone Mortgage Trust, Inc. (i) pursuant to Section 16(a) of the

Securities Exchange Act of 1934, as amended, including without limitation,

statements on Form 3, Form 4, and Form 5(including any amendments thereto)

and (ii) in connection with any applications for EDGAR access codes,

including without limitation the Form ID. The Power of Attorney shall remain

in full force and effect until the undersigned is no longer required to file

Forms 3, 4, and 5 with regard to his ownership of or transactions in

securities of Blackstone Mortgage Trust, Inc., unless earlier revoked in

writing. The undersigned acknowledges that Katharine A. Keenan, Scott Mathias,

and Anthony F. Marone, Jr. are not assuming any of the undersigned's

responsibilities to comply with Section 16 of the Securities Exchange Act of

1934, as amended.

By: /s/ Marcin Urbaszek

Name: Marcin Urbaszek

Date: January 3, 2025

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