X0306 4 2019-05-21 0 0001708405 Tremont Mortgage Trust TRMT 0001716421 Tremont Realty Advisors LLC TWO NEWTON PLACE 255 WASHINGTON STREET, SUITE 300 NEWTON MA 02458 0 0 1 0 0001613503 RMR Group LLC TWO NEWTON PLACE 255 WASHINGTON STREET, SUITE 300 NEWTON MA 02458 0 0 1 0 0001644378 RMR GROUP INC. TWO NEWTON PLACE 255 WASHINGTON STREET, SUITE 300 NEWTON MA 02458 0 0 1 0 Common Shares of Beneficial Interest 2019-05-21 4 A 0 1000000 5.65 A 1600100 D Shares were acquired directly by Tremont Realty Advisors LLC ("TRA") in a public offering transaction at $5.65 per share. All shares reported are held directly by TRA. TRA is a direct wholly owned subsidiary of The RMR Group LLC ("RMR LLC"), which is the direct majority owned operating subsidiary of The RMR Group Inc. ("RMR Inc."). RMR Inc. and RMR LLC may be deemed to beneficially own the shares owned directly by TRA. /s/ David M. Blackman, President, on behalf of Tremont Realty Advisors LLC 2019-05-22 /s/ Adam D. Portnoy, President, on behalf of The RMR Group LLC 2019-05-22 /s/ Adam D. Portnoy, President, on behalf of The RMR Group Inc. 2019-05-22