Item 2(c)(1) Originator Name Originator Name(s) for co-originated loans include only the originator(s) of the note(s) contributed to the BMO 2026-C15 Mortgage Trust transaction. Item 2(c)(4) Original Loan Term Number For the anticipated repayment date mortgage loans U-Haul AREC Portfolio 22 (Asset Number 3), and U-Haul - AREC2 Portfolio (Asset Number 4): the original loan term number represents the term of the mortgage loan through the anticipated repayment date, rather than the actual Maturity Date. Item 2(c)(15) Loan Structure Code For the mortgage loans identified as Arizona Mills (Asset Number 1), Orchard at Saddleback (Asset Number 2), U-Haul AREC Portfolio 22 (Asset Number 3), The Falls (Asset Number 6), One Dag (Asset Number 7), The Pointe at Polaris (Asset Number 8), The Ritz Tower (Asset Number 9), Phoenix Industrial Portfolio XV (Asset Number 11), Birch Run Premium Outlets (Asset Number 14), and One Commerce Plaza (Asset Number 23), each such mortgage loan is evidenced by one or more senior pari passu notes that are part of a whole loan that consists of the subject mortgage loan and one or more senior pari-passu notes and, if applicable, one or more subordinate notes. The other senior pari-passu notes and the subordinate notes are not included in the trust. Item 2(c)(22) Grace Days Allowed Number With respect to the mortgage loan identified as Bradford Plaza (Asset Number 22), the 2-day grace period applies once per 366 days. With respect to the mortgage loan identified as Security Public Storage - Frederick (Asset Number 34), the 5-day grace period applies twice per loan term. Item 2(d)(1) Property Name For mortgage loans that are part of a whole loan, the related mortgaged property secures the entire whole loan, including one or more companion loans not included in the trust. Item 2(d)(2) Property Address For the mortgaged property identified as Orchard at Saddleback (Asset Number 2) the property address of the mortgaged property are 23716, 23730, 23632, 23740 and 23760 El Toro Road. For the mortgaged property identified as U-Haul Storage of North Miami Beach (Asset Number 3.11) the property address of the mortgaged property are 2100 & 2144 Northeast 162nd Street and 16190 Northeast 21st Avenue. For the mortgaged property identified as U-Haul Storage of Salisbury (Asset Number 3.20) the property address of the mortgaged property are 1402 North Salisbury Boulevard and 1530-1534 Edgemore Avenue. For the mortgaged property identified as U-Haul Moving & Storage of Downtown Mobile (Asset Number 4.02) the property address of the mortgaged property are 970 and 1002 SpringHill Avenue and 906 St. Anthony Street. For the mortgaged property identified as Gateway Plaza (Asset Number 18) the property address of the mortgaged property are 3637, 3643, 3725, 3729, 3731, 3733, 3735, 3737, 3739, 3741, 3743, 3749, 3751 South Mooney Boulevard. For the mortgaged property identified as 5601 Riverdale Owners Corp. (Asset Number 41) the property address of the mortgaged property are 5601/5625 Riverdale Avenue a/k/a 501 West 256th Street a/k/a 5601 Riverdale Avenue. Item 2(d)(5) Property Zip For the mortgaged property identified as U-Haul Moving & Storage of Downtown Mobile (Asset Number 4.02) the zip codes of the mortgaged property are 36604 and 36607. For the mortgaged property identified as The Storage Mall - Palmyra (Asset Number 21.01) the zip codes of the mortgaged property are 14522 and 14568. For the mortgaged property identified as The Storage Mall - Ontario (Asset Number 21.02) the zip codes of the mortgaged property are 14432 and 14548. Item 2(d)(8) Net Rentable Square Feet Number For property types where the standard unit of measure is not square feet, this field is left blank. For mortgage loans that are part of a whole loan, net rentable square feet is presented for the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(9) Net Rentable Square Feet Securitization Number For property types where the standard unit of measure is not square feet, this field is left blank. For mortgage loans that are part of a whole loan, the net rentable square feet securitization number is presented for the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(10) Units Beds Rooms Number For mortgage loans that are part of a whole loan, the units beds rooms number relates to the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(11) Units Beds Rooms Securitization Number For mortgage loans that are part of a whole loan, the units beds rooms securitization number relates to the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(14) Valuation Securitization Amount For mortgage loans that are part of a whole loan, the valuation securitization amount relates to the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(20) Physical Occupancy Securitization Percentage The percentage of rentable space is determined based on the applicable unit of measurement provided in Item 2(d)(9) or Item 2(d)(11). Item 2(d)(28)(i) Financials Securitization Date For the assets identified as JTM Foods (Asset Number 10), BJ's Wholesale - Leased Fee (Asset Number 17), Fairharbor Owners, Inc. (Asset Number 20), 16 N. Broadway Owners, Inc. (Asset Number 28), 245-55 Bronx River Owners, Inc. (Asset Number 29), 61 Irving Place Corporation (Asset Number 31), Shoppes at Summer Trees (Asset Number 32), 86th Street Tenants Corp. (Asset Number 35), Sheboygan Industrial (Asset Number 37), Interlaken Owners, Inc. (Asset Number 38), 210 E. Broadway Owners Corp. (Asset Number 39), 665-675 Apartments Corp. (Asset Number 40), 5601 Riverdale Owners Corp. (Asset Number 41), River Place Towers (Asset Number 42), 127 Garth Road Tenants Corp. (Asset Number 43), 2165 Matthews Avenue Owners, Inc. (Asset Number 44), Beach House Owners Corp. (Asset Number 45), Bronxville Court, Inc. (Asset Number 46), 90 Schenck Owners Corp. (Asset Number 47), Crocheron Terrace Owners Corp. (Asset Number 48), Barclay Plaza Owners, Inc. (Asset Number 49), 431 West 121 Street Housing Development Fund Corporation a/k/a 431 West 121st Street Housing Development Fund Corporation (Asset Number 50), and 425 Heights Tenants Corp. (Asset Number 51), the Financials Securitization Date has been left blank as it was not available at the time of securitization. Item 2(d)(28)(iv) Revenue Securitization Amount For mortgage loans that are part of a whole loan, the revenue securitization amount is presented for the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(28)(vi) Operating Expenses Securitization Amount For mortgage loans that are part of a whole loan, the total underwritten operating expenses securitization amount are presented for the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(28)(viii) Net Operating Income Securitization Amount For mortgage loans that are part of a whole loan, the net operating income securitization amount is presented for the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(28)(x) Net Cash Flow Securitization Amount For mortgage loans that are part of a whole loan, the net cash flow securitization amount is presented for the entire mortgaged property that secures the whole loan, including one or more companion loans not included in the trust. Item 2(d)(28)(xv) Debt Service Coverage Net Operating Income Securitization Percentage For mortgage loans that are part of a whole loan, the debt service coverage net operating income securitization percentage is calculated based on the subject mortgage loan and any related pari passu companion loans not included in the trust, but without regard to any subordinate companion loans. Item 2(d)(28)(xvii) Debt Service Coverage Net Cash Flow Securitization Percentage For mortgage loans that are part of a whole loan, the debt service coverage net cash flow securitization percentage is calculated based on the subject mortgage loan and any related pari passu companion loans not included in the trust, but without regard to any subordinate companion loans. Item 2(e)(6) Servicer Trustee Fee Rate Percentage It should be noted that the rate presented consists of (i) the master servicing fee rate, which includes any primary servicing fee rate payable to an outside servicer (for a whole loan) or other primary servicer, and any subservicing fee rate, (ii) the certificate administrator / trustee fee rate payable to the certificate administrator and the trustee, (iii) the operating advisor fee rate, (iv) the asset representations reviewer fee and (v) the CREFC(R) intellectual property royalty license fee rate. Item 2(f)(1) Primary Servicer Name The primary servicer names have been truncated due to EDGAR constraints. The full name for Midland Loan Services is Midland Loan Services, a Division of PNC Bank, National Association. The full name for National Cooperative Bank is National Cooperative Bank, N.A.