| BMO 2026-C15 Mortgage Trust | |
| STATEMENT TO NOTEHOLDERS |
| October 19, 2026 |
| TRANSACTION PARTIES | ||
| Master Servicer: | KeyBank National Association | |
| Master Servicer: | National Cooperative Bank, N.A. | |
| Special Servicer: | Rialto Capital Advisors, LLC | |
| Special Servicer: | National Cooperative Bank, N.A. | |
| Trustee: | Wilmington Savings Fund Society, FSB | |
| Certificate Administrator: | Citibank, N.A. | |
| Depositor: | BMO Commercial Mortgage Securities LLC | |
| Asset Representations Reviewer / | ||
| Park Bridge Lender Services LLC | ||
| Operating Advisor: | ||
| Danny Lee | Citibank, Agency and Trust | |
| (212) 816-4936 | 388 Greenwich Street Trading, 4th Floor | |
| danny1.lee@citi.com | New York, NY 10013 | |
| TABLE OF CONTENTS | ||
| 1. | Distribution Summary | 2 |
| 1.1. | Summary | 2 |
| 1.2. | Factors | 3 |
| 2. | Distribution Detail | 4 |
| 2.1. | Interest Detail | 4 |
| 2.2. | Interest Shortfall Detail | 5 |
| 2.3. | Principal Detail | 6 |
| 3. | Reconciliation Detail | 7 |
| 4. | Other Information | 8 |
| 5. | Stratification Detail | 9 |
| 6. | Mortgage Loan Detail | 14 |
| 7. | NOI Detail | 16 |
| 8. | Delinquency Loan Detail | 18 |
| 9. | Collateral Performance Delinquency and Loan Status Detail | 19 |
| 10. | Appraisal Reduction Detail | 20 |
| 11. | Historical Appraisal Reduction Detail | 21 |
| 12. | Loan Modification Detail | 22 |
| 13. | Historical Loan Modification Detail | 23 |
| 14. | Specially Serviced Loan Detail | 24 |
| 15. | Historical Specially Serviced Loan Detail | 25 |
| 16. | Unscheduled Principal Detail | 26 |
| 17. | Historical Unscheduled Principal Detail | 27 |
| 18. | Liquidated Loan Detail | 28 |
| 19. | Historical Liquidated Loan Detail | 29 |
| 20. | CREFC Investor Reporting Package Legends | 30 |
| 21. | Notes | 31 |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 1 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| DISTRIBUTION SUMMARY |
| October 19, 2026 |
| Accretion | |||||||||||
| & | |||||||||||
| Non-Cash | |||||||||||
| Accrual | Other | Balance | |||||||||
| Original | Prior | Pass-Through | Day | Interest | (As Interest) | Principal | Total | Realized Loss | Increase/ | Current | |
| Class | Balance | Balance | Rate | Count | Distributed | Distributed | Distributed | Distributed | /(Recovery) | (Decrease) | Balance |
| A-1 | 17,087,000.00 | 16,891,410.61 | 4.925500% | 30/360 | 69,332.20 | - | 231,670.28 | 301,002.48 | - | - | 16,659,740.33 |
| A-4 | 145,000,000.00 | 145,000,000.00 | 5.520000% | 30/360 | 667,000.00 | - | - | 667,000.00 | - | - | 145,000,000.00 |
| A-5 | 320,945,000.00 | 320,945,000.00 | 5.818100% | 30/360 | 1,556,075.09 | - | - | 1,556,075.09 | - | - | 320,945,000.00 |
| A-SB | 22,955,000.00 | 22,955,000.00 | 5.778600% | 30/360 | 110,539.80 | - | - | 110,539.80 | - | - | 22,955,000.00 |
| A-S | 86,741,000.00 | 86,741,000.00 | 5.990800% | 30/360 | 433,039.99 | - | - | 433,039.99 | - | - | 86,741,000.00 |
| B | 33,431,000.00 | 33,431,000.00 | 6.171000% | 30/360 | 171,918.92 | - | - | 171,918.92 | - | - | 33,431,000.00 |
| C | 24,396,000.00 | 24,396,000.00 | 6.362000% | 30/360 | 129,339.46 | - | - | 129,339.46 | - | - | 24,396,000.00 |
| D-RR | 13,553,000.00 | 13,553,000.00 | 6.452855% | 30/360 | 72,879.62 | - | - | 72,879.62 | - | - | 13,553,000.00 |
| E-RR | 7,229,000.00 | 7,229,000.00 | 6.452855% | 30/360 | 38,873.08 | - | - | 38,873.08 | - | - | 7,229,000.00 |
| F-RR | 12,649,000.00 | 12,649,000.00 | 6.452855% | 30/360 | 68,018.47 | - | - | 68,018.47 | - | - | 12,649,000.00 |
| G-RR | 8,132,000.00 | 8,132,000.00 | 6.452855% | 30/360 | 43,728.85 | - | - | 43,728.85 | - | - | 8,132,000.00 |
| J-RR | 30,721,426.00 | 30,721,426.00 | 6.452855% | 30/360 | 165,200.65 | - | - | 165,200.65 | - | - | 30,721,426.00 |
| R | - | - | 0.000000% | 30/360 | - | - | - | - | - | - | - |
| S | - | - | 0.000000% | 30/360 | - | - | - | - | - | - | - |
| Total | 722,839,426.00 | 722,643,836.61 | 3,525,946.13 | - | 231,670.28 | 3,757,616.41 | - | - | 722,412,166.33 | ||
| Notional | |||||||||||
| X-A | 505,987,000.00 | 505,791,410.61 | 0.751816% | 30/360 | 316,885.23 | - | - | 316,885.23 | - | (231,670.28) | 505,559,740.33 |
| A-B | 144,568,000.00 | 144,568,000.00 | 0.357744% | 30/360 | 43,098.62 | - | - | 43,098.62 | - | - | 144,568,000.00 |
| Total | 650,555,000.00 | 650,359,410.61 | 359,983.85 | - | - | 359,983.85 | - | (231,670.28) | 650,127,740.33 | ||
| Grand Total | 1,373,394,426 | 1,373,003,247 | 3,885,929.98 | - | 231,670.28 | 4,117,600.26 | - | (231,670.28) | 1,372,539,907 | ||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 2 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| DISTRIBUTION SUMMARY - FACTORS |
| October 19, 2026 |
| Accretion | |||||||||
| & | |||||||||
| Non-Cash | |||||||||
| Other | Balance | ||||||||
| Record | Interest | (As Interest) | Principal | Total | Realized Loss | Increase/ | Current | ||
| Class | CUSIP | Date | Distributed | Distributed | Distributed | Distributed | /(Recovery) | (Decrease) | Balance |
| A-1 | 05620XAA4 | 09/30/2026 | 4.05759934 | - | 13.55827705 | 17.61587640 | - | - | 974.99504477 |
| A-4 | 05620XAB2 | 09/30/2026 | 4.60000000 | - | - | 4.60000000 | - | - | 1,000.00000000 |
| A-5 | 05620XAC0 | 09/30/2026 | 4.84841668 | - | - | 4.84841668 | - | - | 1,000.00000000 |
| A-SB | 05620XAD8 | 09/30/2026 | 4.81549989 | - | - | 4.81549989 | - | - | 1,000.00000000 |
| X-A | 05620XAE6 | 09/30/2026 | 0.62627149 | - | - | 0.62627149 | - | - | 999.15559161 |
| A-B | 05620XAF3 | 09/30/2026 | 0.29812005 | - | - | 0.29812005 | - | - | 1,000.00000000 |
| A-S | 05620XAG1 | 09/30/2026 | 4.99233338 | - | - | 4.99233338 | - | - | 1,000.00000000 |
| B | 05620XAH9 | 09/30/2026 | 5.14250007 | - | - | 5.14250007 | - | - | 1,000.00000000 |
| C | 05620XAJ5 | 09/30/2026 | 5.30166667 | - | - | 5.30166667 | - | - | 1,000.00000000 |
| D-RR | 05620XAK2 | 09/30/2026 | 5.37737918 | - | - | 5.37737918 | - | - | 1,000.00000000 |
| E-RR | 05620XAM8 | 09/30/2026 | 5.37738000 | - | - | 5.37738000 | - | - | 1,000.00000000 |
| F-RR | 05620XAP1 | 09/30/2026 | 5.37737924 | - | - | 5.37737924 | - | - | 1,000.00000000 |
| G-RR | 05620XAR7 | 09/30/2026 | 5.37737949 | - | - | 5.37737949 | - | - | 1,000.00000000 |
| J-RR | 05620XAT3 | 09/30/2026 | 5.37737571 | - | - | 5.37737571 | - | - | 1,000.00000000 |
| R | 05620XAV8 | 09/30/2026 | - | - | - | - | - | - | - |
| S | 05620XAX4 | 09/30/2026 | - | - | - | - | - | - | - |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 3 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust |
| DISTRIBUTION INFORMATION - INTEREST DETAIL |
| October 19, 2026 |
| Rate | Interest | Shortfall | Paid | ||||||||||
| Cap | |||||||||||||
| Accrual | Net | Accreted | Non | Carry | Cap Carryover | Carryover | |||||||
| Class | Uncapped Capped | Next | Dates | Accrued | /Deferred | Recovered | Forward | /Basis Risk | Accrued | Carry Forward /Basis Risk | Total | ||
| A-1 | 4.92550% | 4.92550% | 4.92550% | 09/01-09/30 | 69,332.20 | - | - | - | - | 69,332.20 | - | - | 69,332.20 |
| A-4 | 5.52000% | 5.52000% | 5.52000% | 09/01-09/30 | 667,000.00 | - | - | - | - | 667,000.00 | - | - | 667,000.00 |
| A-5 | 5.81810% | 5.81810% | 5.81810% | 09/01-09/30 | 1,556,075.09 | - | - | - | - | 1,556,075.09 | - | - | 1,556,075.09 |
| A-SB | 5.77860% | 5.77860% | 5.77860% | 09/01-09/30 | 110,539.80 | - | - | - | - | 110,539.80 | - | - | 110,539.80 |
| A-S | 5.99080% | 5.99080% | 5.99080% | 09/01-09/30 | 433,039.99 | - | - | - | - | 433,039.99 | - | - | 433,039.99 |
| B | 6.17100% | 6.17100% | 6.17100% | 09/01-09/30 | 171,918.92 | - | - | - | - | 171,918.92 | - | - | 171,918.92 |
| C | 6.36200% | 6.36200% | 6.36200% | 09/01-09/30 | 129,339.46 | - | - | - | - | 129,339.46 | - | - | 129,339.46 |
| D-RR | 6.45286% | 6.45286% | 6.45286% | 09/01-09/30 | 72,879.62 | - | - | - | - | 72,879.62 | - | - | 72,879.62 |
| E-RR | 6.45286% | 6.45286% | 6.45286% | 09/01-09/30 | 38,873.08 | - | - | - | - | 38,873.08 | - | - | 38,873.08 |
| F-RR | 6.45286% | 6.45286% | 6.45286% | 09/01-09/30 | 68,018.47 | - | - | - | - | 68,018.47 | - | - | 68,018.47 |
| G-RR | 6.45286% | 6.45286% | 6.45286% | 09/01-09/30 | 43,728.85 | - | - | - | - | 43,728.85 | - | - | 43,728.85 |
| J-RR | 6.45286% | 6.45286% | 6.45286% | 09/01-09/30 | 165,200.76 | - | - | 0.11 | - | 165,200.65 | - | - | 165,200.65 |
| R | 0.00000% | 0.00000% | 0.00000% | 09/01-09/30 | - | - | - | - | - | - | - | - | - |
| S | 0.00000% | 0.00000% | 0.00000% | 09/01-09/30 | - | - | - | - | - | - | - | - | - |
| Total | 3,525,946.24 | - | - | 0.11 | - | 3,525,946.13 | - | - | 3,525,946.13 | ||||
| Notional | |||||||||||||
| X-A | 0.75182% | 0.75182% | 0.75182% | 09/01-09/30 | 316,885.23 | - | - | - | - | 316,885.23 | - | - | 316,885.23 |
| A-B | 0.35774% | 0.35774% | 0.35774% | 09/01-09/30 | 43,098.62 | - | - | - | - | 43,098.62 | - | - | 43,098.62 |
| Total | 359,983.85 | - | - | - | - | 359,983.85 | - | - | 359,983.85 | ||||
| Grand Total | 3,885,930.09 | - | - | 0.11 | - | 3,885,929.98 | - | - | 3,885,929.98 | ||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 4 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust |
| DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL |
| October 19, 2026 |
| Cap Carryover / | |||||||||||||
| Non-Recov Shortfall | Carry Forward Interest | Basis Risk Shortfall | |||||||||||
| Other | |||||||||||||
| Class | PPIS | SSRA | Shortfall | Prior | Int. on Prior | New | Paid | Outstanding | Prior | Int. on Prior | New | Paid | Outstanding |
| A-1 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| A-4 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| A-5 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| A-SB | - | - | - | - | - | - | - | - | - | - | - | - | - |
| A-S | - | - | - | - | - | - | - | - | - | - | - | - | - |
| B | - | - | - | - | - | - | - | - | - | - | - | - | - |
| C | - | - | - | - | - | - | - | - | - | - | - | - | - |
| D-RR | - | - | - | - | - | - | - | - | - | - | - | - | - |
| E-RR | - | - | - | - | - | - | - | - | - | - | - | - | - |
| F-RR | - | - | - | - | - | - | - | - | - | - | - | - | - |
| G-RR | - | - | - | - | - | - | - | - | - | - | - | - | - |
| J-RR | - | - | - | - | - | 0.11 | - | 0.11 | - | - | - | - | - |
| R | - | - | - | - | - | - | - | - | - | - | - | - | - |
| S | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Total | - | - | - | - | - | 0.11 | - | 0.11 | - | - | - | - | - |
| Notional | |||||||||||||
| X-A | - | - | - | - | - | - | - | - | - | - | - | - | - |
| A-B | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Total | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Grand Total | - | - | - | - | - | 0.11 | - | 0.11 | - | - | - | - | - |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 5 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust |
| DISTRIBUTION INFORMATION - PRINCIPAL DETAIL |
| October 19, 2026 |
| Accretion | |||||||||||
| & | |||||||||||
| Non-Cash | |||||||||||
| Balance | Cumulative | ||||||||||
| Prior | Principal | Accreted | Realized Loss | Increase/ | Current | Realized | Class % | Class % | Sub % | Sub % | |
| Class | Balance | Distributed | Principal | /(Recovery) | (Decrease) | Balance | Loss | Original | Current | Original | Current |
| A-1 | 16,891,410.61 | 231,670.28 | - | - | - | 16,659,740.33 | - | 0.00% | 2.31% | 0.00% | 30.02% |
| A-4 | 145,000,000.00 | - | - | - | - | 145,000,000.00 | - | 0.00% | 20.07% | 0.00% | 30.02% |
| A-5 | 320,945,000.00 | - | - | - | - | 320,945,000.00 | - | 0.00% | 44.43% | 0.00% | 30.02% |
| A-SB | 22,955,000.00 | - | - | - | - | 22,955,000.00 | - | 0.00% | 3.18% | 0.00% | 30.02% |
| A-S | 86,741,000.00 | - | - | - | - | 86,741,000.00 | - | 0.00% | 12.01% | 0.00% | 30.02% |
| B | 33,431,000.00 | - | - | - | - | 33,431,000.00 | - | 0.00% | 4.63% | 0.00% | 13.38% |
| C | 24,396,000.00 | - | - | - | - | 24,396,000.00 | - | 0.00% | 3.38% | 0.00% | 10.01% |
| D-RR | 13,553,000.00 | - | - | - | - | 13,553,000.00 | - | 0.00% | 1.88% | 0.00% | 8.13% |
| E-RR | 7,229,000.00 | - | - | - | - | 7,229,000.00 | - | 0.00% | 1.00% | 0.00% | 7.13% |
| F-RR | 12,649,000.00 | - | - | - | - | 12,649,000.00 | - | 0.00% | 1.75% | 0.00% | 5.38% |
| G-RR | 8,132,000.00 | - | - | - | - | 8,132,000.00 | - | 0.00% | 1.13% | 0.00% | 4.25% |
| J-RR | 30,721,426.00 | - | - | - | - | 30,721,426.00 | - | 0.00% | 4.25% | 0.00% | 0.00% |
| R | - | - | - | - | - | - | - | 0.00% | 0.00% | 0.00% | 0.00% |
| S | - | - | - | - | - | - | - | 0.00% | 0.00% | 0.00% | 0.00% |
| Total | 722,643,836.61 | 231,670.28 | - | - | - | 722,412,166.33 | - | 0.00% | 100.00% | ||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 6 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| RECONCILIATION DETAIL |
| October 19, 2026 |
| SOURCE OF FUNDS | ALLOCATION OF FUNDS | ||||
| Interest Funds Available | Scheduled Fees | ||||
| Scheduled Interest | 3,901,703.62 | Servicing Fee | 7,661.81 | ||
| Prepayment Interest Shortfall | - | Trustee/Certificate Administrator Fee | 6,666.48 | ||
| Interest Adjustments | - | Operating Advisor Fee | 933.44 | ||
| ASER Amount | - | Asset Representations Reviewer Ongoing Fee | 210.79 | ||
| Realized Loss in Excess of Principal Balance | - | CREFC Intellectual Property Royalty License Fee | 301.12 | ||
| Total Interest Funds Available | 3,901,703.62 | Total Scheduled Fees | 15,773.64 | ||
| Principal Funds Available | Additional Fees, Expenses, etc. | ||||
| Scheduled Principal | 231,670.28 | Additional Servicing Fee | - | ||
| Unscheduled Principal Collections | - | Special Servicing Fee | - | ||
| Net Liquidation Proceeds | - | Work-out Fee | - | ||
| Repurchased Principal | - | Liquidation Fee | - | ||
| Substitution Principal | - | Trust Fund Expenses | - | ||
| Other Principal | - | Trust Advisor Expenses | - | ||
| Reimbursement of Interest on Advances to the Servicer | - | ||||
| Total Principal Funds Available | 231,670.28 | ||||
| Borrower Reimbursable Trust Fund Expenses | - | ||||
| Other Funds Available | |||||
| Other Expenses | - | ||||
| Yield Maintenance Charges | - | ||||
| Withdrawal of Withheld Amounts from the Interest Reserve | Total Additional Fees, Expenses, etc. | - | |||
| Account | - | ||||
| Distributions | |||||
| Deposit of Withheld Amounts to the Interest Reserve Account | - | ||||
| Interest Distribution | 3,885,929.98 | ||||
| Total Other Funds Available | - | Principal Distribution | 231,670.28 | ||
| Yield Maintenance Charge Distribution | - | ||||
| Total Distributions | 4,117,600.26 | ||||
| Total Funds Available | 4,133,373.90 | ||||
| Total Funds Allocated | 4,133,373.90 | ||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 7 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| OTHER INFORMATION | |
| Interest Reserve Account Information | |
| October 19, 2026 |
| Beginning Interest Reserve Account Balance | 0.00 |
| Deposit of Withheld Amounts to the Interest Reserve Account | 0.00 |
| Withdrawal of Withheld Amounts from the Interest Reserve Account | 0.00 |
| Ending Interest Reserve Account Balance | 0.00 |
| Collateral Information | |
| % of Cut-Off Principal Balance Outstanding | 99.940891% |
| Controlling Class Information | |
| Controlling Class is Class J-RR. | |
| The Controlling Class Representative is RREF V - D AIV RR L, LLC. | |
| There Are No Disclosable Special Servicer Fees. |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 8 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| STRATIFICATION DETAIL |
| October 19, 2026 |
| Anticipated Remaining Term | ||||||
| Anticipated Remaining | Asset | Ending Scheduled | % of | Wtd Avg | ||
| Term Range | Count | Balance | Agg.Bal. WAC | WAM | DSCR | |
| 60 Months or Less | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 61 to 90 Months | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 91 Months or Greater | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Total | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Debt Service Coverage Ratio | ||||||
| Debt Service Coverage | Asset | Ending Scheduled | % of | Wtd Avg | ||
| Ratio Range | Count | Balance | Agg.Bal. WAC | WAM | DSCR | |
| 1.250 or Less | 2 | 71,312,500.00 | 9.87 | 6.6674 | 117 | 1.222051 |
| 1.251 to 1.500 | 12 | 147,013,234.85 | 20.35 | 6.6026 | 117 | 1.349637 |
| 1.501 to 1.750 | 9 | 145,895,121.96 | 20.20 | 6.4329 | 116 | 1.571368 |
| 1.751 to 2.000 | 11 | 120,915,260.91 | 16.74 | 6.5001 | 113 | 1.872972 |
| 2.001 to 2.250 | 2 | 13,113,897.34 | 1.82 | 6.6740 | 116 | 2.085999 |
| 2.251 to 2.500 | 3 | 57,750,000.00 | 7.99 | 6.2156 | 118 | 2.378398 |
| 2.501 to 2.750 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 2.751 to 3.000 | 4 | 72,000,000.00 | 9.97 | 6.6570 | 117 | 2.980000 |
| 3.001 to 3.250 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 3.251 to 3.500 | 2 | 25,995,495.49 | 3.60 | 6.1165 | 117 | 3.469214 |
| 3.501 to 3.750 | 1 | 5,050,000.00 | 0.70 | 5.8100 | 116 | 3.710000 |
| 3.751 to 4.000 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 4.001 or Greater | 16 | 63,366,656.46 | 8.77 | 6.2471 | 116 | 8.683711 |
| Total | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 9 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| STRATIFICATION DETAIL |
| October 19, 2026 |
| Ending Schedule Balance | ||||||
| Ending Schedule Balance | Asset | Ending Scheduled | % of | Wtd Avg | ||
| Range | Count | Balance | Agg.Bal. WAC WAM | DSCR | ||
| 1 to 5,000,000 | 19 | 57,455,111.37 | 7.95 | 6.3935 | 115 | 7.120781 |
| 10,000,001 to 15,000,000 | 6 | 79,411,217.37 | 10.99 | 6.6141 | 116 | 2.089053 |
| 15,000,001 to 20,000,000 | 5 | 93,195,955.83 | 12.90 | 6.2629 | 117 | 2.062596 |
| 20,000,001 to 25,000,000 | 5 | 111,155,000.00 | 15.39 | 6.2690 | 115 | 2.262563 |
| 25,000,001 to 30,000,000 | 2 | 56,827,310.59 | 7.87 | 6.4252 | 116 | 1.467258 |
| 30,000,001 to 35,000,000 | 1 | 35,000,000.00 | 4.84 | 7.2350 | 118 | 1.300000 |
| 35,000,001 to 40,000,000 | 1 | 40,000,000.00 | 5.54 | 6.6570 | 117 | 2.980000 |
| 40,000,001 to 45,000,000 | 1 | 44,878,316.12 | 6.21 | 6.0460 | 118 | 1.540000 |
| 45,000,001 to 50,000,000 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 5,000,001 to 10,000,000 | 21 | 149,176,755.73 | 20.65 | 6.5340 | 115 | 2.515219 |
| 50,000,001 to 55,000,000 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 55,000,001 to 60,000,000 | 1 | 55,312,500.00 | 7.66 | 6.8130 | 118 | 1.240000 |
| 60,000,001 to 65,000,000 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 65,000,001 to 70,000,000 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 70,000,001 to 75,000,000 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 75,000,001 to 80,000,000 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 80,000,001 to 85,000,000 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 85,000,000+ | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| Total | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 10 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| STRATIFICATION DETAIL |
| October 19, 2026 |
| Loan Rate | ||||||
| Asset | Ending Scheduled | % of | Wtd Avg | |||
| Loan Rate Range | Count | Balance | Agg.Bal. WAC WAM | DSCR | ||
| 4.00 or Less | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 4.01 to 4.25 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 4.26 to 4.50 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 4.51 to 4.75 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 4.76 to 5.00 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 5.01 to 5.25 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 5.26 to 5.50 | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 5.51 to 5.75 | 1 | 20,445,000.00 | 2.83 | 5.7300 | 107 | 2.000000 |
| 5.76 to 6.00 | 5 | 41,095,999.19 | 5.69 | 5.9014 | 116 | 2.799473 |
| 6.01 to 6.25 | 15 | 182,024,356.32 | 25.20 | 6.0969 | 117 | 2.690151 |
| 6.26 to 6.50 | 16 | 102,224,744.23 | 14.15 | 6.4129 | 116 | 4.367894 |
| 6.51 to 6.75 | 13 | 185,929,947.31 | 25.74 | 6.6308 | 116 | 2.185752 |
| 6.76 to 7.00 | 9 | 143,405,630.60 | 19.85 | 6.8491 | 116 | 1.498730 |
| 7.01 or Greater | 3 | 47,286,489.36 | 6.55 | 7.2010 | 117 | 1.401944 |
| Total | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Property Type | ||||||
| Asset | Ending Scheduled | % of | Wtd Avg | |||
| Property Type Range | Count | Balance | Agg.Bal. WAC WAM | DSCR | ||
| Industrial | 6 | 103,562,936.44 | 14.34 | 6.6366 | 114 | 1.562582 |
| Lodging | 1 | 6,486,489.36 | 0.90 | 7.0050 | 117 | 2.070000 |
| Mixed Use | 1 | 19,250,000.00 | 2.66 | 6.4300 | 118 | 2.350000 |
| Multifamily | 1 | 23,000,000.00 | 3.18 | 6.0900 | 118 | 3.470000 |
| Office | 5 | 84,500,000.00 | 11.70 | 6.6134 | 116 | 1.839941 |
| Other | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| Retail | 17 | 233,672,760.91 | 32.35 | 6.7437 | 116 | 1.989967 |
| Self Storage | 10 | 154,154,420.37 | 21.34 | 6.0938 | 117 | 1.640832 |
| Total | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 11 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| STRATIFICATION DETAIL |
| October 19, 2026 |
| Remaining Amortization Term | ||||||
| Remaining Amortization | Asset | Ending Scheduled | % of | Wtd Avg | ||
| Term Range | Count | Balance | Agg.Bal. | WAC | WAM | DSCR |
| 240 Months or Less | 29 | 400,288,098.23 | 55.41 | 6.5762 | 116 | 2.379200 |
| 241 to 270 Months | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 271 to 300 Months | 3 | 91,651,582.54 | 12.69 | 6.0480 | 118 | 1.432829 |
| 301 Months or Greater | 30 | 230,472,486.24 | 31.90 | 6.4819 | 116 | 3.020085 |
| Total | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Seasoning | ||||||
| Asset | Ending Scheduled | % of | Wtd Avg | |||
| Seasoning Range | Count | Balance | Agg.Bal. | WAC | WAM | DSCR |
| 12 Months or Less | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| 13 to 24 Months | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 25 to 36 Months | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 37 to 48 Months | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| 49 Months or Greater | 0 | 0.00 | 0.00 | 0.0000 | 0 | 0.000000 |
| Total | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 12 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| STRATIFICATION DETAIL |
| October 19, 2026 |
| State | ||||||
| Asset | Ending Scheduled | % of | Wtd Avg | |||
| State Range | Count | Balance | Agg.Bal. WAC WAM | DSCR | ||
| Alaska | 1 | 5,050,000.00 | 0.70 | 5.8100 | 116 | 3.710000 |
| Arizona | 4 | 72,000,000.00 | 9.97 | 6.6570 | 117 | 2.980000 |
| California | 3 | 114,440,816.12 | 15.84 | 6.4907 | 118 | 1.371343 |
| Colorado | 2 | 16,540,000.00 | 2.29 | 6.6824 | 115 | 1.481028 |
| Florida | 5 | 60,745,000.00 | 8.41 | 6.5822 | 113 | 1.833748 |
| Illinois | 1 | 22,210,000.00 | 3.07 | 6.5700 | 117 | 1.620000 |
| Maryland | 1 | 5,500,000.00 | 0.76 | 6.1090 | 116 | 1.570000 |
| Massachusetts | 1 | 3,152,000.00 | 0.44 | 5.7900 | 111 | 1.620000 |
| Michigan | 4 | 20,000,000.00 | 2.77 | 6.4600 | 112 | 1.920000 |
| Nevada | 3 | 67,273,266.42 | 9.31 | 6.1049 | 118 | 1.665200 |
| New Jersey | 4 | 69,614,260.91 | 9.64 | 6.8100 | 117 | 1.371193 |
| New York | 25 | 171,069,559.93 | 23.68 | 6.3147 | 116 | 4.603904 |
| North Carolina | 2 | 21,314,805.84 | 2.95 | 6.5420 | 115 | 1.530000 |
| Ohio | 2 | 31,486,489.36 | 4.36 | 6.7144 | 115 | 1.855622 |
| Oklahoma | 1 | 10,000,000.00 | 1.38 | 6.7800 | 115 | 1.570000 |
| Pennsylvania | 1 | 19,250,000.00 | 2.66 | 6.4300 | 118 | 2.350000 |
| Texas | 1 | 8,172,837.83 | 1.13 | 6.4600 | 116 | 1.420000 |
| Wisconsin | 1 | 4,593,130.60 | 0.64 | 6.8740 | 118 | 1.490000 |
| Total | 62 | 722,412,167.01 | 100.00 | 6.4791 | 116 | 2.463598 |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 13 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| MORTGAGE LOAN DETAIL |
| October 19, 2026 |
| Prop | Paid | Beginning | Ending | Payment Workout Mod | ||||||||||
| Type | Through | Gross | Interest | Principal | Scheduled | Scheduled | Maturity | Status | Strategy Code | |||||
| Loan ID | OMCR | (1) | City | State | Date | Coupon | Payment | Payment | Balance | Balance | Date | (2) | (3) | (4) |
| 10270467 | 10 | IN | Chicago | IL | 10/06/2026 | 6.57000% | 121,599.75 | - | 22,210,000.00 | 22,210,000.00 | 07/06/2036 | 0 | 0 | 0 |
| 10270468 | 11A-2 | IN | Winston Salem | NC | 10/06/2026 | 6.54200% | 81,524.14 | 13,700.76 | 14,953,985.23 | 14,940,284.47 | 05/06/2036 | 0 | 0 | 0 |
| 10270469 | 11A-3 | IN | Winston Salem | NC | 10/06/2026 | 6.54200% | 34,783.63 | 5,845.66 | 6,380,367.03 | 6,374,521.37 | 05/06/2036 | 0 | 0 | 0 |
| 10265729 | 12 | OF | Henderson | NV | 10/01/2026 | 6.23000% | 106,429.17 | - | 20,500,000.00 | 20,500,000.00 | 09/01/2036 | 0 | 0 | 0 |
| 10263871 | 13 | IN | Tallahassee | FL | 10/01/2026 | 5.73000% | 97,624.88 | - | 20,445,000.00 | 20,445,000.00 | 09/01/2035 | 0 | 0 | 0 |
| 10270471 | 14A-3 | RT | Birch Run | MI | 10/01/2026 | 6.46000% | 34,991.67 | - | 6,500,000.00 | 6,500,000.00 | 02/01/2036 | 0 | 0 | 0 |
| 10270473 | 14A-6 | RT | Birch Run | MI | 10/01/2026 | 6.46000% | 18,841.67 | - | 3,500,000.00 | 3,500,000.00 | 02/01/2036 | 0 | 0 | 0 |
| 10265548 | 15 | MU | West Chester | PA | 10/01/2026 | 6.43000% | 103,147.92 | - | 19,250,000.00 | 19,250,000.00 | 08/01/2036 | 0 | 0 | 0 |
| 10268074 | 16 | SS | Brooklyn | NY | 10/01/2026 | 5.97000% | 89,550.00 | - | 18,000,000.00 | 18,000,000.00 | 08/01/2036 | 0 | 0 | 0 |
| 10270474 | 17 | OT | Hanover | NJ | 10/06/2026 | 6.16400% | 82,186.67 | - | 16,000,000.00 | 16,000,000.00 | 07/06/2036 | 0 | 0 | 0 |
| 10266385 | 18 | RT | Visalia | CA | 10/01/2026 | 6.64000% | 78,850.00 | - | 14,250,000.00 | 14,250,000.00 | 08/01/2036 | 0 | 0 | 0 |
| 10270475 | 19 | RT | Somerdale | NJ | 10/06/2026 | 6.63000% | 71,724.55 | 11,558.86 | 12,981,819.77 | 12,970,260.91 | 07/06/2036 | 0 | 0 | 0 |
| 10270443 | 1A-1 | RT | Tempe | AZ | 10/01/2026 | 6.65700% | 221,900.00 | - | 40,000,000.00 | 40,000,000.00 | 07/01/2036 | 0 | 0 | 0 |
| 10270444 | 1A-2 | RT | Tempe | AZ | 10/01/2026 | 6.65700% | 110,950.00 | - | 20,000,000.00 | 20,000,000.00 | 07/01/2036 | 0 | 0 | 0 |
| 10270452 | 1A-8 | RT | Tempe | AZ | 10/01/2026 | 6.65700% | 41,606.25 | - | 7,500,000.00 | 7,500,000.00 | 07/01/2036 | 0 | 0 | 0 |
| 10270453 | 2 | RT | Lake Forest | CA | 10/06/2026 | 6.81300% | 314,036.72 | - | 55,312,500.00 | 55,312,500.00 | 08/06/2036 | 0 | 0 | 0 |
| 470150570 | 20 | CH | PATCHOGUE | NY | 10/01/2026 | 6.43000% | 65,274.94 | 11,276.58 | 12,181,948.57 | 12,170,671.99 | 07/01/2036 | 0 | 0 | 0 |
| 10270476 | 21 | SS | Walworth | NY | 10/06/2026 | 6.34000% | 53,256.00 | - | 10,080,000.00 | 10,080,000.00 | 07/06/2036 | 0 | 0 | 0 |
| 10270477 | 22 | RT | Stillwater | OK | 10/06/2026 | 6.78000% | 56,500.00 | - | 10,000,000.00 | 10,000,000.00 | 05/06/2036 | 0 | 0 | 0 |
| 10270480 | 24 | RT | Louisville | CO | 10/06/2026 | 6.71500% | 49,467.17 | - | 8,840,000.00 | 8,840,000.00 | 04/06/2036 | 0 | 0 | 0 |
| 10270481 | 25 | SS | Mesquite | TX | 10/01/2026 | 6.46000% | 44,037.90 | 7,576.16 | 8,180,413.99 | 8,172,837.83 | 06/01/2036 | 0 | 0 | 0 |
| 10265100 | 26 | SS | Glendale | NY | 10/01/2026 | 5.85000% | 39,000.00 | - | 8,000,000.00 | 8,000,000.00 | 03/01/2036 | 0 | 0 | 0 |
| 10270482 | 27 | SS | Aurora | CO | 10/06/2026 | 6.64500% | 42,638.75 | - | 7,700,000.00 | 7,700,000.00 | 08/06/2036 | 0 | 0 | 0 |
| 470151220 | 28 | CH | WHITE PLAINS | NY | 10/01/2026 | 5.90000% | 33,913.06 | 3,571.79 | 6,897,570.98 | 6,893,999.19 | 08/01/2036 | 0 | 0 | 0 |
| 470149040 | 29 | CH | YONKERS | NY | 10/01/2026 | 6.35000% | 35,103.24 | 6,275.43 | 6,633,683.41 | 6,627,407.98 | 06/01/2036 | 0 | 0 | 0 |
| 10270483 | 30 | LO | Cambridge | OH | 10/06/2026 | 7.00500% | 37,896.23 | 5,370.26 | 6,491,859.62 | 6,486,489.36 | 07/06/2036 | 0 | 0 | 0 |
| 470150940 | 31 | CH | NEW YORK | NY | 10/01/2026 | 6.20000% | 31,000.00 | - | 6,000,000.00 | 6,000,000.00 | 07/01/2036 | 0 | 0 | 0 |
| 10270484 | 32 | RT | Port Orange | FL | 10/01/2026 | 7.21500% | 34,872.50 | - | 5,800,000.00 | 5,800,000.00 | 08/01/2036 | 0 | 0 | 0 |
| 10267999 | 33 | MH | Oxford | NJ | 10/01/2026 | 6.42000% | 30,195.40 | - | 5,644,000.00 | 5,644,000.00 | 08/01/2036 | 0 | 0 | 0 |
| 10270485 | 34 | SS | Frederick | MD | 10/06/2026 | 6.10900% | 27,999.58 | - | 5,500,000.00 | 5,500,000.00 | 06/06/2036 | 0 | 0 | 0 |
| 470150090 | 35 | CH | NEW YORK | NY | 10/01/2026 | 6.03000% | 27,135.00 | - | 5,400,000.00 | 5,400,000.00 | 06/01/2036 | 0 | 0 | 0 |
| 10270486 | 36 | SS | Anchorage | AK | 10/06/2026 | 5.81000% | 24,450.42 | - | 5,050,000.00 | 5,050,000.00 | 06/06/2036 | 0 | 0 | 0 |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 14 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| MORTGAGE LOAN DETAIL |
| October 19, 2026 |
| Prop | Paid | Beginning | Ending | Payment Workout Mod | ||||||||||
| Type | Through | Gross | Interest | Principal | Scheduled | Scheduled | Maturity | Status | Strategy Code | |||||
| Loan ID | OMCR | (1) | City | State | Date | Coupon | Payment | Payment | Balance | Balance | Date | (2) | (3) | (4) |
| 10270487 | 37 | IN | Sheboygan | WI | 10/01/2026 | 6.87400% | 26,333.22 | 3,882.43 | 4,597,013.03 | 4,593,130.60 | 08/01/2036 | 0 | 0 | 0 |
| 470150620 | 38 | CH | EASTCHESTER | NY | 10/01/2026 | 6.35000% | 23,754.07 | 4,246.54 | 4,488,958.68 | 4,484,712.14 | 06/01/2036 | 0 | 0 | 0 |
| 470150350 | 39 | CH | LONG BEACH | NY | 10/01/2026 | 6.09000% | 21,822.50 | - | 4,300,000.00 | 4,300,000.00 | 07/01/2036 | 0 | 0 | 0 |
| 10270455 | 3A-3 | SS | Las Vegas | NV | 10/06/2026 | 6.05000% | 135,449.42 | 38,690.76 | 26,866,001.35 | 26,827,310.59 | 08/06/2051 | 0 | 0 | 0 |
| 10270456 | 3A-4 | SS | Las Vegas | NV | 10/06/2026 | 6.05000% | 100,705.89 | 28,766.36 | 19,974,722.19 | 19,945,955.83 | 08/06/2051 | 0 | 0 | 0 |
| 10270457 | 4 | SS | Lancaster | CA | 10/06/2026 | 6.04600% | 226,438.22 | 64,764.08 | 44,943,080.20 | 44,878,316.12 | 08/06/2051 | 0 | 0 | 0 |
| 470150600 | 40 | CH | NEW ROCHELLE | NY | 10/01/2026 | 6.43000% | 22,070.42 | 3,812.78 | 4,118,896.55 | 4,115,083.77 | 07/01/2036 | 0 | 0 | 0 |
| 470151090 | 41 | CH | BRONX | NY | 10/01/2026 | 6.39000% | 21,288.30 | 1,817.23 | 3,997,802.91 | 3,995,985.68 | 07/01/2036 | 0 | 0 | 0 |
| 10264620 | 42 | OT | Lowell | MA | 10/01/2026 | 5.79000% | 15,208.40 | - | 3,152,000.00 | 3,152,000.00 | 01/01/2036 | 0 | 0 | 0 |
| 470151130 | 43 | CH | SCARSDALE | NY | 10/01/2026 | 6.43000% | 16,051.21 | 2,772.94 | 2,995,561.11 | 2,992,788.17 | 07/01/2036 | 0 | 0 | 0 |
| 470149900 | 44 | CH | BRONX | NY | 10/01/2026 | 6.32000% | 15,783.63 | 1,396.81 | 2,996,892.30 | 2,995,495.49 | 06/01/2036 | 0 | 0 | 0 |
| 470150970 | 45 | CH | LONG BEACH | NY | 10/01/2026 | 6.24000% | 13,493.90 | 5,495.08 | 2,594,981.69 | 2,589,486.61 | 08/01/2036 | 0 | 0 | 0 |
| 470150780 | 46 | CH | YONKERS | NY | 10/01/2026 | 6.15000% | 12,792.04 | 2,438.66 | 2,496,007.22 | 2,493,568.56 | 07/01/2036 | 0 | 0 | 0 |
| 470150440 | 47 | CH | GREAT NECK | NY | 10/01/2026 | 6.11000% | 8,910.42 | - | 1,750,000.00 | 1,750,000.00 | 06/01/2036 | 0 | 0 | 0 |
| 470150740 | 48 | CH | FLUSHING | NY | 10/01/2026 | 6.28000% | 8,882.95 | 1,617.43 | 1,697,378.61 | 1,695,761.18 | 07/01/2036 | 0 | 0 | 0 |
| 470150910 | 49 | CH | FLUSHING | NY | 10/01/2026 | 6.74000% | 9,246.86 | 1,444.04 | 1,646,324.60 | 1,644,880.56 | 06/01/2036 | 0 | 0 | 0 |
| 10270458 | 5 | IN | Lawrence Township | NJ | 10/01/2026 | 7.23500% | 211,020.83 | - | 35,000,000.00 | 35,000,000.00 | 08/01/2036 | 0 | 0 | 0 |
| 470150390 | 50 | CH | NEW YORK | NY | 10/01/2026 | 6.10000% | 7,605.13 | 1,484.79 | 1,496,091.78 | 1,494,606.99 | 06/01/2036 | 0 | 0 | 0 |
| 470150520 | 51 | CH | BROOKLYN | NY | 10/01/2026 | 6.11000% | 6,868.54 | 3,864.85 | 1,348,976.47 | 1,345,111.62 | 06/01/2036 | 0 | 0 | 0 |
| 10270459 | 6A-2 | RT | Miami | FL | 10/01/2026 | 6.98090% | 87,261.25 | - | 15,000,000.00 | 15,000,000.00 | 06/01/2036 | 0 | 0 | 0 |
| 10270460 | 6A-3 | RT | Miami | FL | 10/01/2026 | 6.98090% | 58,174.17 | - | 10,000,000.00 | 10,000,000.00 | 06/01/2036 | 0 | 0 | 0 |
| 10270461 | 6A-4 | RT | Miami | FL | 10/01/2026 | 6.98090% | 55,265.46 | - | 9,500,000.00 | 9,500,000.00 | 06/01/2036 | 0 | 0 | 0 |
| 10270462 | 7 | OF | New York | NY | 10/06/2026 | 6.76070% | 169,017.50 | - | 30,000,000.00 | 30,000,000.00 | 06/06/2036 | 0 | 0 | 0 |
| 10270463 | 8 | OF | Columbus | OH | 10/06/2026 | 6.63900% | 138,312.50 | - | 25,000,000.00 | 25,000,000.00 | 05/06/2036 | 0 | 0 | 0 |
| 10270465 | 9 | MF | New York | NY | 10/06/2026 | 6.09000% | 116,725.00 | - | 23,000,000.00 | 23,000,000.00 | 08/06/2036 | 0 | 0 | 0 |
| 10270470 | A-2-2 | RT | Birch Run | MI | 10/01/2026 | 6.46000% | 37,683.33 | - | 7,000,000.00 | 7,000,000.00 | 02/01/2036 | 0 | 0 | 0 |
| 10270478 | A-3-2 | OF | Albany | NY | 10/06/2026 | 6.92500% | 35,707.03 | - | 6,187,500.00 | 6,187,500.00 | 02/06/2036 | 0 | 0 | 0 |
| 10270479 | A-4-2 | OF | Albany | NY | 10/06/2026 | 6.92500% | 16,230.47 | - | 2,812,500.00 | 2,812,500.00 | 02/06/2036 | 0 | 0 | 0 |
| 10270447 | A-4-2 | RT | Tempe | AZ | 10/01/2026 | 6.65700% | 24,963.75 | - | 4,500,000.00 | 4,500,000.00 | 07/01/2036 | 0 | 0 | 0 |
| 10270472 | A-5-2 | RT | Birch Run | MI | 10/01/2026 | 6.46000% | 16,150.00 | - | 3,000,000.00 | 3,000,000.00 | 02/01/2036 | 0 | 0 | 0 |
| Total | Count = 62 | 3,901,703.62 | 231,670.28 | 722,643,837.29 | 722,412,167.01 | |||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 15 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| NOI DETAIL |
| October 19, 2026 |
| Property | Ending | Preceding | Most | Most Recent | Most Recent | ||||
| Type | Scheduled | Fiscal | Recent | Financial As of | Financial Asof | ||||
| Loan ID | OMCR | (1) | City | State | Balance | Year NOI | NOI | Start Date | End Date |
| 10270467 | 10 | IN | Chicago | IL | 22,210,000.00 | 2,481,932.29 | 2,481,932.29 | Not Available | Not Available |
| 10270468 | 11A-2 | IN | Winston Salem | NC | 14,940,284.47 | 7,904,194.88 | 7,904,194.88 | Not Available | Not Available |
| 10270469 | 11A-3 | IN | Winston Salem | NC | 6,374,521.37 | 7,904,194.88 | 7,904,194.88 | Not Available | Not Available |
| 10265729 | 12 | OF | Henderson | NV | 20,500,000.00 | 4,055,342.90 | 4,055,342.90 | Not Available | Not Available |
| 10263871 | 13 | IN | Tallahassee | FL | 20,445,000.00 | 2,401,087.97 | 2,401,087.97 | Not Available | Not Available |
| 10270471 | 14A-3 | RT | Birch Run | MI | 6,500,000.00 | 13,763,012.97 | 13,763,012.97 | Not Available | Not Available |
| 10270473 | 14A-6 | RT | Birch Run | MI | 3,500,000.00 | 13,763,012.97 | 13,763,012.97 | Not Available | Not Available |
| 10265548 | 15 | MU | West Chester | PA | 19,250,000.00 | 3,752,298.70 | 3,752,298.70 | Not Available | Not Available |
| 10268074 | 16 | SS | Brooklyn | NY | 18,000,000.00 | 2,570,891.71 | 2,570,891.71 | Not Available | Not Available |
| 10270474 | 17 | OT | Hanover | NJ | 16,000,000.00 | 1,362,359.15 | 1,362,359.15 | Not Available | Not Available |
| 10266385 | 18 | RT | Visalia | CA | 14,250,000.00 | 1,586,975.55 | 1,586,975.55 | Not Available | Not Available |
| 10270475 | 19 | RT | Somerdale | NJ | 12,970,260.91 | 1,986,999.82 | 1,986,999.82 | Not Available | Not Available |
| 10270443 | 1A-1 | RT | Tempe | AZ | 40,000,000.00 | 28,686,161.75 | 28,686,161.75 | Not Available | Not Available |
| 10270444 | 1A-2 | RT | Tempe | AZ | 20,000,000.00 | 28,686,161.75 | 28,686,161.75 | Not Available | Not Available |
| 10270452 | 1A-8 | RT | Tempe | AZ | 7,500,000.00 | 28,686,161.75 | 28,686,161.75 | Not Available | Not Available |
| 10270453 | 2 | RT | Lake Forest | CA | 55,312,500.00 | 7,825,664.79 | 7,825,664.79 | Not Available | Not Available |
| 470150570 | 20 | CH | PATCHOGUE | NY | 12,170,671.99 | 4,446,439.00 | 4,446,439.00 | Not Available | Not Available |
| 10270476 | 21 | SS | Walworth | NY | 10,080,000.00 | 1,129,302.02 | 1,129,302.02 | Not Available | Not Available |
| 10270477 | 22 | RT | Stillwater | OK | 10,000,000.00 | 1,145,995.06 | 1,145,995.06 | Not Available | Not Available |
| 10270480 | 24 | RT | Louisville | CO | 8,840,000.00 | 991,186.31 | 991,186.31 | Not Available | Not Available |
| 10270481 | 25 | SS | Mesquite | TX | 8,172,837.83 | 892,266.75 | 892,266.75 | Not Available | Not Available |
| 10265100 | 26 | SS | Glendale | NY | 8,000,000.00 | 922,747.56 | 922,747.56 | Not Available | Not Available |
| 10270482 | 27 | SS | Aurora | CO | 7,700,000.00 | 689,792.46 | 689,792.46 | Not Available | Not Available |
| 470151220 | 28 | CH | WHITE PLAINS | NY | 6,893,999.19 | 426,212.85 | 2,231,143.00 | Not Available | Not Available |
| 470149040 | 29 | CH | YONKERS | NY | 6,627,407.98 | 273,969.81 | 1,077,516.00 | Not Available | Not Available |
| 10270483 | 30 | LO | Cambridge | OH | 6,486,489.36 | 1,197,845.00 | 1,197,845.00 | Not Available | Not Available |
| 470150940 | 31 | CH | NEW YORK | NY | 6,000,000.00 | 392,573.00 | 2,032,599.00 | Not Available | Not Available |
| 10270484 | 32 | RT | Port Orange | FL | 5,800,000.00 | 563,233.00 | 563,233.00 | Not Available | Not Available |
| 10267999 | 33 | MH | Oxford | NJ | 5,644,000.00 | 511,588.64 | 511,588.64 | Not Available | Not Available |
| 10270485 | 34 | SS | Frederick | MD | 5,500,000.00 | 635,786.23 | 635,786.23 | Not Available | Not Available |
| 470150090 | 35 | CH | NEW YORK | NY | 5,400,000.00 | 4,298,947.00 | 4,298,947.00 | Not Available | Not Available |
| 10270486 | 36 | SS | Anchorage | AK | 5,050,000.00 | 1,110,582.00 | 1,110,582.00 | Not Available | Not Available |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 16 of 31 | © Copyright 2026 Citigroup | ||||||
| BMO 2026-C15 Mortgage Trust | |
| NOI DETAIL |
| October 19, 2026 |
| Property | Ending | Preceding | Most | Most Recent | Most Recent | ||||
| Type | Scheduled | Fiscal | Recent | Financial As of | Financial Asof | ||||
| Loan ID | OMCR | (1) | City | State | Balance | Year NOI | NOI | Start Date | End Date |
| 10270487 | 37 | IN | Sheboygan | WI | 4,593,130.60 | 553,901.00 | 553,901.00 | Not Available | Not Available |
| 470150620 | 38 | CH | EASTCHESTER | NY | 4,484,712.14 | 532,564.00 | 12,807,065.00 | Not Available | Not Available |
| 470150350 | 39 | CH | LONG BEACH | NY | 4,300,000.00 | 124,039.00 | 1,359,758.00 | Not Available | Not Available |
| 10270455 | 3A-3 | SS | Las Vegas | NV | 26,827,310.59 | 13,978,526.00 | 13,978,526.00 | Not Available | Not Available |
| 10270456 | 3A-4 | SS | Las Vegas | NV | 19,945,955.83 | 13,978,526.00 | 13,978,526.00 | Not Available | Not Available |
| 10270457 | 4 | SS | Lancaster | CA | 44,878,316.12 | 5,411,092.43 | 5,411,092.43 | Not Available | Not Available |
| 470150600 | 40 | CH | NEW ROCHELLE | NY | 4,115,083.77 | 409,614.33 | 1,588,797.00 | Not Available | Not Available |
| 470151090 | 41 | CH | BRONX | NY | 3,995,985.68 | 595,274.00 | 1,774,696.00 | Not Available | Not Available |
| 10264620 | 42 | OT | Lowell | MA | 3,152,000.00 | 300,000.00 | 300,000.00 | Not Available | Not Available |
| 470151130 | 43 | CH | SCARSDALE | NY | 2,992,788.17 | 1,618,080.00 | 1,618,080.00 | Not Available | Not Available |
| 470149900 | 44 | CH | BRONX | NY | 2,995,495.49 | 135,931.02 | 735,687.00 | Not Available | Not Available |
| 470150970 | 45 | CH | LONG BEACH | NY | 2,589,486.61 | 165,984.00 | 2,043,450.00 | Not Available | Not Available |
| 470150780 | 46 | CH | YONKERS | NY | 2,493,568.56 | 126,562.00 | 1,139,243.00 | Not Available | Not Available |
| 470150440 | 47 | CH | GREAT NECK | NY | 1,750,000.00 | 820,669.00 | 820,669.00 | Not Available | Not Available |
| 470150740 | 48 | CH | FLUSHING | NY | 1,695,761.18 | 782,096.00 | 782,096.00 | Not Available | Not Available |
| 470150910 | 49 | CH | FLUSHING | NY | 1,644,880.56 | 140,555.85 | 862,544.00 | Not Available | Not Available |
| 10270458 | 5 | IN | Lawrence Township | NJ | 35,000,000.00 | 3,416,337.63 | 3,416,337.63 | Not Available | Not Available |
| 470150390 | 50 | CH | NEW YORK | NY | 1,494,606.99 | (68,070.00) | 702,184.00 | Not Available | Not Available |
| 470150520 | 51 | CH | BROOKLYN | NY | 1,345,111.62 | 153,601.22 | 1,649,678.00 | Not Available | Not Available |
| 10270459 | 6A-2 | RT | Miami | FL | 15,000,000.00 | 17,658,031.89 | 17,658,031.89 | Not Available | Not Available |
| 10270460 | 6A-3 | RT | Miami | FL | 10,000,000.00 | 17,658,031.89 | 17,658,031.89 | Not Available | Not Available |
| 10270461 | 6A-4 | RT | Miami | FL | 9,500,000.00 | 17,658,031.89 | 17,658,031.89 | Not Available | Not Available |
| 10270462 | 7 | OF | New York | NY | 30,000,000.00 | 23,866,531.56 | 23,866,531.56 | Not Available | Not Available |
| 10270463 | 8 | OF | Columbus | OH | 25,000,000.00 | 5,453,674.50 | 5,453,674.50 | Not Available | Not Available |
| 10270465 | 9 | MF | New York | NY | 23,000,000.00 | 8,158,575.87 | 8,158,575.87 | Not Available | Not Available |
| 10270470 | A-2-2 | RT | Birch Run | MI | 7,000,000.00 | 13,763,012.97 | 13,763,012.97 | Not Available | Not Available |
| 10270478 | A-3-2 | OF | Albany | NY | 6,187,500.00 | 8,353,684.00 | 8,353,684.00 | Not Available | Not Available |
| 10270479 | A-4-2 | OF | Albany | NY | 2,812,500.00 | 8,353,684.00 | 8,353,684.00 | Not Available | Not Available |
| 10270447 | A-4-2 | RT | Tempe | AZ | 4,500,000.00 | 28,686,161.75 | 28,686,161.75 | Not Available | Not Available |
| 10270472 | A-5-2 | RT | Birch Run | MI | 3,000,000.00 | 13,763,012.97 | 13,763,012.97 | Not Available | Not Available |
| Total | Count = 62 | 722,412,167.01 | 383,592,637.29 | 410,188,186.21 | |||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 17 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| DELINQUENCY LOAN DETAIL |
| October 19, 2026 |
| Actual | Paid | Current P&I | Total P&I | Cumulative | Other Expense | Payment Workout | Most Recent | ||||||
| Principal | Through | Advances | Advances | Accrued Unpaid | Advances | Status | Strategy | Special Serv | Foreclosure | Bankruptcy | REO | ||
| Loan ID | OMCR | Balance | Date | (Net of ASER) | Outstanding | Interest Advances | Outstanding | (2) | (3) | Transfer Date | Date | Date | Date |
| No Loans with Delinquency Activity to Report. | |||||||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 18 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust |
| COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL |
| October 19, 2026 |
| Delinquent | |||||||||||||||
| (Does not include loans in Bankruptcy, Foreclosure, or REO) | |||||||||||||||
| 30 Day | 60 Day | 90 Day | 120+ Day | Bankruptcy | Foreclosure | REO | |||||||||
| Distribution | |||||||||||||||
| Date | Count | Balance | Count | Balance | Count | Balance | Count | Balance | Count | Balance | Count | Balance | Count | Balance | |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| 10/19/2026 | |||||||||||||||
| 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | ||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| 09/17/2026 | |||||||||||||||
| 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | ||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 19 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| APPRAISAL REDUCTION DETAIL |
| October 19, 2026 |
| Beginning | Ending | Appraisal | Appraisal | Most Recent | Cumulative | |||
| Loan ID | OMCR | Property Name | Scheduled Balance | Scheduled Balance | Reduction Amount | Reduction Date | ASER Amount | ASER Amount |
| No Loans with Appraisal Reduction Activity. | ||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 20 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust |
| HISTORICAL APPRAISAL REDUCTION DETAIL |
| October 19, 2026 |
| Distribution | Beginning | Ending | Appraisal | Appraisal | Most Recent | Cumulative | |||
| Date | Loan ID | OMCR | Property Name | Scheduled Balance | Scheduled Balance | Reduction Amount | Reduction Date | ASER Amount | ASER Amount |
| No Loans with Appraisal Reduction Activity. | |||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 21 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| LOAN MODIFICATION DETAIL |
| October 19, 2026 |
| Modification | Modification | |||
| Loan ID | OMCR | Property Name | Date | Code (4) |
| No Loans with Modification Activity to Report. | ||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 22 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust |
| HISTORICAL LOAN MODIFICATION DETAIL |
| October 19, 2026 |
| Distribution | Modification | Modification | |||
| Date | Loan ID | OMCR | Property Name | Date | Code (4) |
| No Loans with Modification Activity to Report. | |||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 23 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| SPECIALLY SERVICED LOAN DETAIL |
| October 19, 2026 |
| Special Servicing | Ending | Ending | Most | Most Recent | Most Recent | Most Recent | |||
| Workout | Fee Amount | Scheduled | Actual | Recent | Valuation | Special Servicer | Master Servicer | ||
| Loan ID | OMCR | Strategy (3) | Plus Adjustments | Balance | Balance | Value | Date | Transfer Date | Return Date |
| No Loans Specially Serviced to Report. | |||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 24 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| HISTORICAL SPECIALLY SERVICED LOANS |
| October 19, 2026 |
| Special Servicing | Ending | Ending | Most | Most Recent | Most Recent | Most Recent | ||||
| Distribution | Workout | Fee Amount | Scheduled | Actual | Recent | Valuation | Special Servicer | Master Servicer | ||
| Date | Loan ID | OMCR | Strategy (3) | Plus Adjustments | Balance | Balance | Value | Date | Transfer Date | Return Date |
| No Loans Specially Serviced to Report. | ||||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 25 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| UNSCHEDULED PRINCIPAL DETAIL |
| October 19, 2026 |
| Liquidation / | Liquid / Prepay | Principal | Principal | Prepayment Interest | Prepayment | Yield Maintenance | ||
| Loan ID | OMCR | Prepayment Date | Code (5) | Collections | Adjustments | Excess / (Shortfall) | Penalties (PPP) | Penalties (YM) |
| No Loans with Unscheduled Principal Activity to Report. | ||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 26 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust |
| HISTORICAL UNSCHEDULED PRINCIPAL DETAIL |
| October 19, 2026 |
| Distribution | Liquidation / | Liquid / Prepay | Principal | Principal | Prepayment Interest | Prepayment | Yield Maintenance | ||
| Date | Loan ID | OMCR | Prepayment Date | Code (5) | Collections | Adjustments | Excess / (Shortfall) | Penalties (PPP) | Penalties (YM) |
| No Loans with Unscheduled Principal Activity to Report. | |||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 27 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| LIQUIDATED LOAN DETAIL |
| October 19, 2026 |
| Beginning | Most | Liquidation | Net | Net | Realized | Date of | Loss with | ||||
| Scheduled | Recent | Sales | Proceeds | Liquidation | Proceeds | Loss to | Current | Current Cumulative | Cumulative | ||
| Loan ID | OMCR | Balance | Value | Price | Received | Expense | Available | Trust | Adj. to Loan | Adj. to Loan Adj. to Loan | Adj. to Trust |
| No Loans liquidated to Report. | |||||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 28 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| HISTORICAL LIQUIDATED LOAN |
| October 19, 2026 |
| Beginning | Most | Liquidation | Net | Net | Realized | Date of | Loss with | ||||
| Distribution | Scheduled | Recent | Sales | Proceeds | Liquidation | Proceeds | Loss to | Current | Current Cumulative | Cumulative | |
| Date | Loan ID OMCR | Balance | Value | Price | Received | Expense | Available | Trust | Adj. to Loan | Adj. to Loan Adj. to Loan | Adj. to Trust |
| No Loans liquidated to Report. | |||||||||||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 29 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust |
| CREFC® INVESTOR REPORTING PACKAGE LEGENDS |
| October 19, 2026 |
| 1|CREFC Investor Reporting Package Legends | |||||
| Property Type (1) | Workout Strategy (3) | Liquidation/Prepayment Code (5) | |||
| MF | Multifamily | 1 | Modification | 1 | Partial Liquidation (Curtailment) |
| RT | Retail | 2 | Foreclosure | 2 | Payoff Prior To Maturity |
| HC | HealthCare | 3 | Bankruptcy | 3 | Disposition / Liquidation |
| IN | Industrial | 4 | Extension | 4 | Repurchase / Substitution |
| MH | Mobile Home Park | 5 | Note Sale | 5 | Full Payoff At Maturity |
| OF | Office | 6 | DPO | 6 | DPO |
| MU | Mixed Use | 7 | REO | 7 | Liquidation prior to 7/1/2006 |
| LO | Lodging | 8 | Resolved | 8 | Payoff With Penalty |
| SS | Self Storage | 9 | Pending Return to Master Servicer | 9 | Payoff With Yield Maintenance |
| SE | Securities | 10 | Deed In Lieu of Foreclosure | 10 | Curtailment With Penalty |
| CH | Cooperative Housing | 11 | Full Payoff | 11 | Curtailment With Yield Maintenance |
| ZZ | Missing Information | 12 | Reps and Warranties | ||
| SF | SF | 13 | TBD | ||
| WH | Warehouse | 98 | Other | ||
| OT | Other | ||||
| Modification Code (4) | |||||
| Payment Status of Loan (2) | |||||
| 1 | Maturity Date Extension | ||||
| A | In Grace Period | 2 | Amortization Change | ||
| B | Late, but less than 30 Days | 3 | Principal Write-Off | ||
| 0 | Current | 4 | Blank (formerly Combination) | ||
| 1 | 30-59 Days Delinquent | 5 | Temporary Rate Reduction | ||
| 2 | 60-89 Days Delinquent | 6 | Capitalization of Interest | ||
| 3 | 90-120 Days Delinquent | 7 | Capitalization of Taxes | ||
| 4 | Performing Matured Balloon | 8 | Other | ||
| 5 | Non Performing Matured Balloon | 9 | Combination | ||
| 6 | 121+ Days Delinquent | 10 | Forbearance | ||
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 30 of 31 | © Copyright 2026 Citigroup |
| BMO 2026-C15 Mortgage Trust | |
| NOTES |
| October 19, 2026 |
| No Notes available for this deal at this time. |
| Reports Available at sf.citidirect.com | v. 21.09.28 | Page 31 of 31 | © Copyright 2026 Citigroup |