144 0001802461 XXXXXXXX LIVE 0001061630 BLACKSTONE MORTGAGE TRUST, INC. 001-14788 345 PARK AVENUE 24TH FLOOR NEW YORK NY 10154 2126550220 Keenan Katharine A Officer Class A common stock Merrill Lynch

225 Liberty St Floor 37 New York NY 10281

2315 44833.50 167723732 12/01/2025 NYSE Class A common stock 11/29/2025 Vesting of restricted stock unit award BLACKSTONE MORTGAGE TRUST, INC. N 2315 11/29/2025 Granted as part of issuer equity compensation N Katherine Keenan

345 PARK AVENUE 24TH FLOOR New York NY 10281

Class A common stock 09/02/2025 2315 44572.14 Katherine Keenan

345 PARK AVENUE 24TH FLOOR New York NY 10281

Class A common stock 09/17/2025 4593 89529.23 12/01/2025 08/08/2024 Katherine Keenan