BMO 2026-C15 Mortgage Trust Sample Contracts

BMO COMMERCIAL MORTGAGE SECURITIES LLC PURCHASER and STARWOOD MORTGAGE CAPITAL LLC SELLER MORTGAGE LOAN PURCHASE AGREEMENT Dated as of August 1, 2026 BMO 2026-C15 Mortgage Trust Commercial Mortgage Pass-Through Certificates, Series 2026-C15
Mortgage Loan Purchase Agreement • August 18th, 2026 • BMO 2026-C15 Mortgage Trust • Asset-backed securities • New York

This Mortgage Loan Purchase Agreement (“Agreement”), dated as of August 1, 2026, is between BMO Commercial Mortgage Securities LLC, a Delaware limited liability company, as purchaser (the “Purchaser”), and Starwood Mortgage Capital LLC, a Delaware limited liability company, as seller (the “Seller”).

AGREEMENT BETWEEN NOTE HOLDERS Dated as of July 27, 2026 by and between BANK OF AMERICA, NATIONAL ASSOCIATION (Initial Note A-1 Holder and Initial Note A-2 Holder), and WELLS FARGO BANK, NATIONAL ASSOCIATION (Initial Note A-3 Holder and Initial Note...
Agreement Between Note Holders • August 18th, 2026 • BMO 2026-C15 Mortgage Trust • Asset-backed securities • New York

This AGREEMENT BETWEEN NOTE HOLDERS (“Agreement”), dated as of July 27, 2026, by and between BANK OF AMERICA, NATIONAL ASSOCIATION (together with its successors and assigns in interest, in its capacity as initial owner of Note A-1 (as defined below), the “Initial Note A-1 Holder”, and in its capacity as the initial agent, the “Initial Agent”), BANK OF AMERICA, NATIONAL ASSOCIATION (together with its successors and assigns in interest, in its capacity as initial owner of Note A-2 (as defined below), the “Initial Note A-2 Holder”), WELLS FARGO BANK, NATIONAL ASSOCIATION (together with its successors and assigns in interest, in its capacity as initial owner of Note A-3 (as defined below), the “Initial Note A-3 Holder”), and WELLS FARGO BANK, NATIONAL ASSOCIATION (together with its successors and assigns in interest, in its capacity as initial owner of Note A-4 (as defined below), the “Initial Note A-4 Holder” and together with the Initial Note A-1 Holder, Initial Note A-2 Holder and Initi

CO-LENDER AGREEMENT Dated as of August 6, 2026 by and between CITI REAL ESTATE FUNDING INC. (Initial Note A-1 Holder) and CITI REAL ESTATE FUNDING INC. (Initial Note A-2 Holder) Ritz Tower
Co-Lender Agreement • August 18th, 2026 • BMO 2026-C15 Mortgage Trust • Asset-backed securities • New York

THIS CO-LENDER AGREEMENT (this “Agreement”), dated as of August 6, 2026 is by and between CITI REAL ESTATE FUNDING INC. (“CREFI” and together with its successors and assigns in interest, in its capacity as initial owner of the Note A-1, the “Initial Note A-1 Holder”, and in its capacity as the initial agent, the “Initial Agent”) and CREFI (together with its successors and assigns in interest, in its capacity as initial owner of the Note A-2, the “Initial Note A-2 Holder” and, together with the Initial Note A-1 Holder, the “Initial Note Holders”).

CO-LENDER AGREEMENT Dated as of June 15, 2026 between GERMAN AMERICAN CAPITAL CORPORATION (Note A-1 Holder, Note A-2 Holder, Note A-3 Holder, Note A-4 Holder) and JPMORGAN CHASE BANK, NATIONAL ASSOCIATION (Note A-5 Holder, Note A-6 Holder)
Co-Lender Agreement • August 18th, 2026 • BMO 2026-C15 Mortgage Trust • Asset-backed securities • New York

THIS CO-LENDER AGREEMENT (the “Agreement”), dated as of June 15, 2026, is between GERMAN AMERICAN CAPITAL CORPORATION, a Maryland corporation (“GACC”), having an address at 1 Columbus Circle, New York, New York 10019, as Note A-1 Holder, Note A-2 Holder, Note A-3 Holder and Note A-4 Holder, and JPMORGAN CHASE BANK, NATIONAL ASSOCIATION, a national banking association (“JPM” and together with GACC, individually or collectively, as the context may require, “Lender” or “Lenders”), having an address at 270 Park Avenue, New York, New York 10017, as Note A-5 Holder and Note A-6 Holder.

COMMERCIAL MORTGAGE PASS-THROUGH CERTIFICATES, SERIES 2026-C15
Underwriting Agreement • August 31st, 2026 • BMO 2026-C15 Mortgage Trust • Asset-backed securities

Citigroup Global Markets Inc. 390 Greenwich Street New York, New York 10013 Wells Fargo Securities, LLC 30 Hudson Yards, 15th Floor New York, New York 10001