Citigroup Commercial Mortgage Trust 2015-GC31

04/23/2026 | Press release | Distributed by Public on 04/23/2026 10:58

Asset-Backed Issuer Distribution Report (Form 10-D)


Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
STATEMENT TO NOTEHOLDERS
April 10, 2026
TRANSACTION PARTIES
Depositor: Citigroup Commercial Mortgage Securities Inc.
Master Servicer: Wells Fargo Bank, National Association
Certificate Administrator: Citibank, N.A.
Trustee: Deutsche Bank Trust Company Americas
Special Servicer: Torchlight Loan Services, LLC
Operating Advisor: Pentalpha Surveillance LLC.
Danny Lee Citibank, Agency and Trust
(212) 816-4936 388 Greenwich Street Trading, 4th Floor
[email protected] 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 15
8 . Delinquency Loan Detail 16
9 . Collateral Performance Delinquency and Loan Status Detail 17
10 . Appraisal Reduction Detail 18
11 . Historical Appraisal Reduction Detail 19
12 . Loan Modification Detail 22
13 . Historical Loan Modification Detail 23
14 . Specially Serviced Loan Detail 26
15 . Historical Specially Serviced Loan Detail 27
16 . Unscheduled Principal Detail 34
17 . Historical Unscheduled Principal Detail 35
18 . Liquidated Loan Detail 37
19 . Historical Liquidated Loan Detail 38
20 . CREFC Investor Reporting Package Legends 39
21 . Notes 40
Reports Available at sf.citidirect.com v. 21.09.28 Page 1 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
DISTRIBUTION SUMMARY
April 10, 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
Class A-1 28,330,000.00 - 1.637000 % 30/360 - - - - - - -
Class A-2 2,298,000.00 - 3.084000 % 30/360 - - - - - - -
Class A-3 160,000,000.00 - 3.497000 % 30/360 - - - - - - -
Class A-4 268,724,000.00 44,317,732.40 3.762000 % 30/360 - - - - - - 44,317,732.40
Class A-AB 46,974,000.00 - 3.431000 % 30/360 - - - - - - -
Class A-S 58,763,000.00 58,763,000.00 3.628606 % 30/360 - - - - - - 58,763,000.00
Class B 42,871,000.00 42,871,000.00 3.629606 % 30/360 - - - - - - 42,871,000.00
Class C 33,852,000.00 33,852,000.00 3.629606 % 30/360 - - - - - - 33,852,000.00
Class D 24,284,000.00 24,284,000.00 3.629606 % 30/360 - - - - - - 24,284,000.00
Class E 11,000,000.00 11,000,000.00 3.629606 % 30/360 - - - - - - 11,000,000.00
Class F 14,864,000.00 9,877,183.78 3.629606 % 30/360 - - - - 117,001.71 - 9,760,182.07
Class G 12,231,000.00 - 3.629606 % 30/360 - - - - - - -
Class H 19,132,869.00 - 3.629606 % 30/360 - - - - - - -
Class S - - 0.000000 % 30/360 - - - - - - -
Class R - - 0.000000 % 30/360 - - - - - - -
Total 723,323,869.00 224,964,916.18 - - - - 117,001.71 - 224,847,914.47
Notional
Class X-A 565,089,000.00 103,080,732.40 0.000000 % 30/360 - - - - - - 103,080,732.40
Grand Total 1,288,412,869 328,045,648.58 - - - - 117,001.71 - 327,928,646.87
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
DISTRIBUTION SUMMARY - FACTORS
April 10, 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
Class A-1 17323 YAA7 03/31/2026 - - - - - - -
Class A-2 17323 YAB5 03/31/2026 - - - - - - -
Class A-3 17323 YAC3 03/31/2026 - - - - - - -
Class A-4 17323 YAD1 03/31/2026 - - - - - - 164.91914529
Class A-AB 17323 YAE9 03/31/2026 - - - - - - -
Class A-S 17323 YAF6 03/31/2026 - - - - - - 1,000.00000000
Class X-A 17323 YAL3 03/31/2026 - - - - - - 182.41503975
Class B 17323 YAG4 03/31/2026 - - - - - - 1,000.00000000
Class C 17323 YAH2 03/31/2026 - - - - - - 1,000.00000000
Class D 17323 YAJ8 03/31/2026 - - - - - - 1,000.00000000
Class E 17323 YAN9 03/31/2026 - - - - - - 1,000.00000000
Class F 17323 YAQ2 03/31/2026 - - - - 7.87148210 - 656.63227059
Class G 17323 YAS8 03/31/2026 - - - - - - -
Class H 17323 YAU3 03/31/2026 - - - - - - -
Class S 17323 YAW9 03/31/2026 - - - - - - -
Class R 17323 YAY5 03/31/2026 - - - - - - -
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
DISTRIBUTION INFORMATION - INTEREST DETAIL
April 10, 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
Class A-1 1.63700 % 1.63700 % 1.63700 % 03/01-03/31 - - - - - - - - -
Class A-2 3.08400 % 3.08400 % 3.08400 % 03/01-03/31 - - - - - - - - -
Class A-3 3.49700 % 3.49700 % 3.49700 % 03/01-03/31 - - - - - - - - -
Class A-4 3.76200 % 3.76200 % 3.76200 % 03/01-03/31 138,936.09 - - 140,686.56 - - - - -
Class A-AB 3.43100 % 3.43100 % 3.43100 % 03/01-03/31 - - - - - - - - -
Class A-S 3.62861 % 3.62861 % 3.62861 % 03/01-03/31 177,689.80 - - 181,010.72 - - - - -
Class B 3.62961 % 3.62961 % 3.62961 % 03/01-03/31 129,670.69 - - 132,801.27 - - - - -
Class C 3.62961 % 3.62961 % 3.62961 % 03/01-03/31 102,391.18 - - 107,405.33 - - - - -
Class D 3.62961 % 3.62961 % 3.62961 % 03/01-03/31 73,451.12 - - 79,502.00 - - - - -
Class E 3.62961 % 3.62961 % 3.62961 % 03/01-03/31 33,271.39 - - 36,126.10 - - - - -
Class F 3.62961 % 3.62961 % 3.62961 % 03/01-03/31 29,875.24 - - 33,280.15 - - - - -
Class G 3.62961 % 3.62961 % 3.62961 % 03/01-03/31 - - - 3,638.75 - - - - -
Class H 3.62961 % 3.62961 % 3.62961 % 03/01-03/31 - - - 7,147.82 - - - - -
Class S 0.00000 % 0.00000 % 0.00000 % 03/01-03/31 - - - - - - - - -
Class R 0.00000 % 0.00000 % 0.00000 % 03/01-03/31 - - - - - - - - -
Total 685,285.51 - - 721,598.70 - - - - -
Notional
Class X-A 0.00000 % 0.00000 % 0.00000 % 03/01-03/31 - - - - - - - - -
Total - - - - - - - - -
Grand Total 685,285.51 - - 721,598.70 - - - - -
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL
April 10, 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
Class A-1 - - - - - - - - - - - - -
Class A-2 - - - - - - - - - - - - -
Class A-3 - - - - - - - - - - - - -
Class A-4 - - - 558,363.20 1,750.47 138,936.09 - 699,049.76 - - - - -
Class A-AB - - - - - - - - - - - - -
Class A-S - - - 1,098,245.41 3,320.92 177,689.80 - 1,279,256.13 - - - - -
Class B - - - 1,035,013.85 3,130.58 129,670.69 - 1,167,815.12 - - - - -
Class C - - - 1,657,750.17 5,014.15 102,391.18 - 1,765,155.50 - - - - -
Class D - - - 2,000,509.33 6,050.88 73,451.12 - 2,080,011.33 - - - - -
Class E - - - 943,807.69 2,854.71 33,271.39 - 979,933.79 - - - - -
Class F - - - 1,125,713.55 3,404.91 29,875.24 - 1,158,993.70 - - - - -
Class G - - - 1,203,023.32 3,638.75 - - 1,206,662.07 - - - - -
Class H - - - 2,363,173.42 7,147.82 - - 2,370,321.24 - - - - -
Class S - - - - - - - - - - - - -
Class R - - - - - - - - - - - - -
Total - - - 11,985,599.94 36,313.19 685,285.51 - 12,707,198.64 - - - - -
Notional
Class X-A - - - - - - - - - - - - -
Total - - - - - - - - - - - - -
Grand Total - - - 11,985,599.94 36,313.19 685,285.51 - 12,707,198.64 - - - - -
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
DISTRIBUTION INFORMATION - PRINCIPAL DETAIL
April 10, 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
Class A-1 - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
Class A-2 - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
Class A-3 - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
Class A-4 44,317,732.40 - - - - 44,317,732.40 - 0.00 % 0.00 % 0.00 % 0.00 %
Class A-AB - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
Class A-S 58,763,000.00 - - - - 58,763,000.00 - 0.00 % 0.00 % 0.00 % 0.00 %
Class B 42,871,000.00 - - - - 42,871,000.00 - 0.00 % 0.00 % 0.00 % 0.00 %
Class C 33,852,000.00 - - - - 33,852,000.00 - 0.00 % 0.00 % 0.00 % 0.00 %
Class D 24,284,000.00 - - - - 24,284,000.00 - 0.00 % 0.00 % 0.00 % 0.00 %
Class E 11,000,000.00 - - - - 11,000,000.00 - 0.00 % 0.00 % 0.00 % 0.00 %
Class F 9,877,183.78 - - 117,001.71 - 9,760,182.07 5,103,817.93 0.00 % 0.00 % 0.00 % 0.00 %
Class G - - - - - - 12,231,000.00 0.00 % 0.00 % 0.00 % 0.00 %
Class H - - - - - - 19,132,869.00 0.00 % 0.00 % 0.00 % 0.00 %
Class S - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
Class R - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
Total 224,964,916.18 - - 117,001.71 - 224,847,914.47 36,467,686.93 0.00 % 0.00 %
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
RECONCILIATION DETAIL
April 10, 2026
SOURCE OF FUNDS ALLOCATION OF FUNDS
Interest Funds Available Scheduled Fees
Scheduled Interest 398,302.99 Servicing Fee 498.78
Prepayment Interest Shortfall - Trustee/Certificate Administrator Fee -
Interest Adjustments 463,339.54 Operating Advisor Fee 251.83
ASER Amount - CREFC Intellectual Property Royalty License Fee 96.87
Realized Loss in Excess of Principal Balance -
Total Scheduled Fees 847.48
Total Interest Funds Available 861,642.53 Additional Fees, Expenses, etc.
Principal Funds Available Additional Servicing Fee -
Scheduled Principal - Special Servicing Fee -
Unscheduled Principal Collections 117,001.71 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 117,001.71
Borrower Reimbursable Trust Fund Expenses -
Other Funds Available
Reimbursement of Nonrecoverable Advances to the Servicer 1,020,207.89
Refunds of Special Servicing Fee 42,411.13
Other Expenses -
Yield Maintenance Charges -
Withdrawal of Withheld Amounts from the Interest Reserve Total Additional Fees, Expenses, etc. 1,020,207.89
Account -
Distributions
Deposit of Withheld Amounts to the Interest Reserve Account -
Interest Distribution -
Current Period Adjustment to Loan - Other -
Principal Distribution -
Total Other Funds Available 42,411.13 Yield Maintenance Charge Distribution -
Total Distributions -
Total Funds Available 1,021,055.37
Total Funds Allocated 1,021,055.37
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
OTHER INFORMATION
Interest Reserve Account Information
April 10, 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
Excess Liquidation Proceeds Reserve Account Information
Beginning Excess Liquidation Proceeds Reserve Account Balance 0.00
Deposit to the Excess Liquidation Proceeds Reserve Account 0.00
Withdrawal from the Excess Liquidation Proceeds Reserve Account 0.00
Ending Excess Liquidation Proceeds Reserve Account Balance 0.00
Collateral Information
% of Cut-Off Principal Balance Outstanding 31.085372 %
Controlling Class Information
Controlling Class is Class F.
Control Termination Event is in Effect.
Identification of the current Controlling Class Representative has not been provided.
There Are No Disclosable Special Servicer Fees.
Non-Active Exchangeable Certificates
Class PEZ Beginning Balance 135,486,000.00
Class PEZ Ending Balance 135,486,000.00
Unpaid Fees
Unpaid Trustee/Certificate Administrator Fee 3,208.61
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
STRATIFICATION DETAIL
April 10, 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 6 224,847,914.47 100.00 3.5225 26 -0.473172
61 to 90 Months 0 0.00 0.00 0.0000 0 0.000000
91 Months or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 6 224,847,914.47 100.00 3.5225 26 -0.473172
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 3 138,619,970.64 61.65 3.2410 43 -1.769784
1.251 to 1.500 0 0.00 0.00 0.0000 0 0.000000
1.501 to 1.750 2 81,072,943.83 36.06 3.9646 0 1.596715
1.751 to 2.000 1 5,155,000.00 2.29 4.1400 0 1.840000
2.001 to 2.250 0 0.00 0.00 0.0000 0 0.000000
2.251 to 2.500 0 0.00 0.00 0.0000 0 0.000000
2.501 to 2.750 0 0.00 0.00 0.0000 0 0.000000
2.751 to 3.000 0 0.00 0.00 0.0000 0 0.000000
3.001 to 3.250 0 0.00 0.00 0.0000 0 0.000000
3.251 to 3.500 0 0.00 0.00 0.0000 0 0.000000
3.501 to 3.750 0 0.00 0.00 0.0000 0 0.000000
3.751 to 4.000 0 0.00 0.00 0.0000 0 0.000000
4.001 or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 6 224,847,914.47 100.00 3.5225 26 -0.473172
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
STRATIFICATION DETAIL
April 10, 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 0 0.00 0.00 0.0000 0 0.000000
10,000,001 to 15,000,000 0 0.00 0.00 0.0000 0 0.000000
15,000,001 to 20,000,000 0 0.00 0.00 0.0000 0 0.000000
20,000,001 to 25,000,000 0 0.00 0.00 0.0000 0 0.000000
25,000,001 to 30,000,000 1 29,000,000.00 12.90 4.1300 30 1.189400
30,000,001 to 35,000,000 0 0.00 0.00 0.0000 0 0.000000
35,000,001 to 40,000,000 0 0.00 0.00 0.0000 0 0.000000
40,000,001 to 45,000,000 0 0.00 0.00 0.0000 0 0.000000
45,000,001 to 50,000,000 0 0.00 0.00 0.0000 0 0.000000
5,000,001 to 10,000,000 3 23,847,914.47 10.61 2.5727 12 1.025480
50,000,001 to 55,000,000 0 0.00 0.00 0.0000 0 0.000000
55,000,001 to 60,000,000 0 0.00 0.00 0.0000 0 0.000000
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 1 72,000,000.00 32.02 3.9085 0 1.590000
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+ 1 100,000,000.00 44.47 3.2950 49 -2.798200
Total 6 224,847,914.47 100.00 3.5225 26 -0.473172
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
STRATIFICATION DETAIL
April 10, 2026
Loan Rate
Asset Ending Scheduled % of Wtd Avg
Loan Rate Range Count Balance Agg.Bal. WAC WAM DSCR
4.00 or Less 3 181,619,970.64 80.77 3.3637 28 -0.910362
4.01 to 4.25 2 34,155,000.00 15.19 4.1315 25 1.287595
4.26 to 4.50 1 9,072,943.83 4.04 4.4100 0 1.650000
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 0 0.00 0.00 0.0000 0 0.000000
5.76 to 6.00 0 0.00 0.00 0.0000 0 0.000000
6.01 to 6.25 0 0.00 0.00 0.0000 0 0.000000
6.26 to 6.50 0 0.00 0.00 0.0000 0 0.000000
6.51 to 6.75 0 0.00 0.00 0.0000 0 0.000000
6.76 to 7.00 0 0.00 0.00 0.0000 0 0.000000
7.01 or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 6 224,847,914.47 100.00 3.5225 26 -0.473172
Property Type
Asset Ending Scheduled % of Wtd Avg
Property Type Range Count Balance Agg.Bal. WAC WAM DSCR
Industrial 0 0.00 0.00 0.0000 0 0.000000
Lodging 1 9,072,943.83 4.04 4.4100 0 1.650000
Mixed Use 0 0.00 0.00 0.0000 0 0.000000
Multifamily 0 0.00 0.00 0.0000 0 0.000000
Office 3 138,619,970.64 61.65 3.2410 43 -1.769784
Other 1 72,000,000.00 32.02 3.9085 0 1.590000
Retail 1 5,155,000.00 2.29 4.1400 0 1.840000
Self Storage 0 0.00 0.00 0.0000 0 0.000000
Total 6 224,847,914.47 100.00 3.5225 26 -0.473172
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
STRATIFICATION DETAIL
April 10, 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 6 224,847,914.47 100.00 3.5225 26 -0.473172
241 to 270 Months 0 0.00 0.00 0.0000 0 0.000000
271 to 300 Months 0 0.00 0.00 0.0000 0 0.000000
301 Months or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 6 224,847,914.47 100.00 3.5225 26 -0.473172
Seasoning
Asset Ending Scheduled % of Wtd Avg
Seasoning Range Count Balance Agg.Bal. WAC WAM DSCR
12 Months or Less 0 0.00 0.00 0.0000 0 0.000000
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 6 224,847,914.47 100.00 3.5225 26 -0.473172
Total 6 224,847,914.47 100.00 3.5225 26 -0.473172
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
STRATIFICATION DETAIL
April 10, 2026
State
Asset Ending Scheduled % of Wtd Avg
State Range Count Balance Agg.Bal. WAC WAM DSCR
California 2 38,619,970.64 17.18 3.1012 30 0.893129
Colorado 0 0.00 0.00 0.0000 0 0.000000
Florida 0 0.00 0.00 0.0000 0 0.000000
Hawaii 0 0.00 0.00 0.0000 0 0.000000
Illinois 1 100,000,000.00 44.47 3.2950 49 -2.798200
Iowa 0 0.00 0.00 0.0000 0 0.000000
Kansas 0 0.00 0.00 0.0000 0 0.000000
Louisiana 0 0.00 0.00 0.0000 0 0.000000
Maryland 0 0.00 0.00 0.0000 0 0.000000
Michigan 0 0.00 0.00 0.0000 0 0.000000
Minnesota 0 0.00 0.00 0.0000 0 0.000000
Nebraska 1 9,072,943.83 4.04 4.4100 0 1.650000
Nevada 0 0.00 0.00 0.0000 0 0.000000
New Jersey 0 0.00 0.00 0.0000 0 0.000000
North Carolina 0 0.00 0.00 0.0000 0 0.000000
Ohio 0 0.00 0.00 0.0000 0 0.000000
Oklahoma 0 0.00 0.00 0.0000 0 0.000000
Oregon 0 0.00 0.00 0.0000 0 0.000000
Pennsylvania 0 0.00 0.00 0.0000 0 0.000000
Rhode Island 1 5,155,000.00 2.29 4.1400 0 1.840000
South Carolina 0 0.00 0.00 0.0000 0 0.000000
Texas 0 0.00 0.00 0.0000 0 0.000000
Various 1 72,000,000.00 32.02 3.9085 0 1.590000
Total 6 224,847,914.47 100.00 3.5225 26 -0.473172
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
MORTGAGE LOAN DETAIL
April 10, 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 )
304101385 1 OF Chicago IL 10/06/2021 3.29500 % - - 100,000,000.00 100,000,000.00 05/06/2030 3 1 0
304101397 17 LO Omaha NE 04/06/2026 4.41000 % - 46,486.56 9,119,430.39 9,072,943.83 06/06/2025 4 13 8
304140002 2 N/A Various Various 03/06/2026 3.90850 % 242,327.00 - 72,000,000.00 72,000,000.00 04/06/2025 5 1 8
304140034 34 RT North Smithfield RI 04/01/2026 4.14000 % 18,377.58 - 5,155,000.00 5,155,000.00 06/01/2025 4 7 0
304101400 4 OF Pasadena CA 03/06/2026 4.13000 % 137,598.41 - 29,000,000.00 29,000,000.00 10/06/2028 B 1 4
304140004 4 A OF Pasadena CA 03/06/2026 0.00000 % - - 9,619,970.64 9,619,970.64 10/06/2028 B 0 0
Total Count = 6 398,302.99 46,486.56 224,894,401.03 224,847,914.47
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
NOI DETAIL
April 10, 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
304101385 1 OF Chicago IL 100,000,000.00 (6,284,753.64 ) (5,947,594.42 ) Not Available Not Available
304101397 17 LO Omaha NE 9,072,943.83 1,222,754.56 1,387,716.97 07/01/2024 06/30/2025
304140002 2 N/A Various Various 72,000,000.00 27,939,961.01 12,628,558.00 01/01/2025 06/30/2025
304140034 34 RT North Smithfield RI 5,155,000.00 401,800.00 200,900.00 01/01/2020 06/30/2020
304101400 4 OF Pasadena CA 29,000,000.00 2,900,108.60 2,334,548.00 Not Available Not Available
304140004 4 A OF Pasadena CA 9,619,970.64 - - Not Available Not Available
Total Count = 6 224,847,914.47 26,179,870.53 10,604,128.55
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
DELINQUENCY LOAN DETAIL
April 10, 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
304101385 1 100,000,000.00 10/06/2021 - - 230,828.07 3,497,927.13 3 1 11/17/2021
304140002 2 72,000,000.00 03/06/2026 242,327.00 242,017.00 153.37 - 5 1 11/24/2024
304101400 4 28,793,595.04 03/06/2026 137,598.41 137,431.84 - - B 1 03/20/2025
304140004 4 A 10,827,172.52 03/06/2026 - - - - B 0
Total Count = 4 211,620,767.56 379,925.41 379,448.84 230,981.44 3,497,927.13
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL
April 10, 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 1 100,000,000 0 0 0 0 1 5,155,000
04/10/2026
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 16.7 % 44.3 % 0.0 % 0.0 % 0.0 % 0.0 % 16.7 % 2.3 %
0 0 0 0 0 0 2 138,826,376 0 0 0 0 1 5,155,000
03/12/2026
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 40.0 % 61.7 % 0.0 % 0.0 % 0.0 % 0.0 % 20.0 % 2.3 %
0 0 0 0 0 0 2 138,826,376 0 0 0 0 1 5,155,000
02/12/2026
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 40.0 % 61.7 % 0.0 % 0.0 % 0.0 % 0.0 % 20.0 % 2.3 %
1 72,000,000 0 0 1 38,826,376 2 109,270,032 0 0 0 0 1 5,155,000
01/12/2026
20.0 % 32.0 % 0.0 % 0.0 % 20.0 % 17.2 % 40.0 % 48.5 % 0.0 % 0.0 % 0.0 % 0.0 % 20.0 % 2.3 %
0 0 1 38,826,376 0 0 2 109,270,032 0 0 0 0 1 5,155,000
12/12/2025
0.0 % 0.0 % 20.0 % 17.2 % 0.0 % 0.0 % 40.0 % 48.5 % 0.0 % 0.0 % 0.0 % 0.0 % 20.0 % 2.3 %
1 38,826,376 0 0 1 9,270,032 1 100,000,000 0 0 1 5,155,000 0 0
11/13/2025
20.0 % 17.2 % 0.0 % 0.0 % 20.0 % 4.1 % 20.0 % 44.4 % 0.0 % 0.0 % 20.0 % 2.3 % 0.0 % 0.0 %
0 0 2 48,226,898 0 0 1 100,000,000 0 0 1 5,155,000 0 0
10/10/2025
0.0 % 0.0 % 40.0 % 21.4 % 0.0 % 0.0 % 20.0 % 44.4 % 0.0 % 0.0 % 20.0 % 2.3 % 0.0 % 0.0 %
2 48,226,898 0 0 0 0 1 100,000,000 0 0 1 5,155,000 0 0
09/12/2025
40.0 % 21.4 % 0.0 % 0.0 % 0.0 % 0.0 % 20.0 % 44.4 % 0.0 % 0.0 % 20.0 % 2.3 % 0.0 % 0.0 %
0 0 1 39,090,878 0 0 1 100,000,000 0 0 0 0 0 0
08/12/2025
0.0 % 0.0 % 20.0 % 17.3 % 0.0 % 0.0 % 20.0 % 44.3 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 39,090,878 0 0 0 0 1 100,000,000 0 0 0 0 0 0
07/11/2025
12.5 % 15.0 % 0.0 % 0.0 % 0.0 % 0.0 % 12.5 % 38.4 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 2,024,136 0 0 0 0 1 100,000,000 0 0 0 0 0 0
06/12/2025
10.0 % 0.7 % 0.0 % 0.0 % 0.0 % 0.0 % 10.0 % 35.3 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 12,573,382 0 0 0 0 1 100,000,000 0 0 0 0 0 0
05/12/2025
4.0 % 3.3 % 0.0 % 0.0 % 0.0 % 0.0 % 4.0 % 26.3 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
APPRAISAL REDUCTION DETAIL
April 10, 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
304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
304101397 17 Magnolia Hotel Omaha 9,119,430.39 9,072,943.83 - 11/06/2025 - -
304101400 4 Pasadena Office Tower 29,000,000.00 29,000,000.00 18,433,794.92 06/06/2025 - -
304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 11,587,394.42 10/06/2025 - -
304140034 34 Walgreens-Smithfield 5,155,000.00 5,155,000.00 - 01/06/2026 - -
Total Count = 5 215,274,430.39 215,227,943.83 124,151,068.13 - 1,102,148.51
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL APPRAISAL REDUCTION DETAIL
April 10, 2026
Most Recent Cumulative
Distribution Beginning Ending Appraisal Appraisal
Date Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
4/10/2026 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
4/10/2026 304101397 17 Magnolia Hotel Omaha 9,119,430.39 9,072,943.83 - 11/06/2025 - -
4/10/2026 304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 11,587,394.42 10/06/2025 - -
4/10/2026 304140034 34 Walgreens-Smithfield 5,155,000.00 5,155,000.00 - 01/06/2026 - -
4/10/2026 304101400 4 Pasadena Office Tower 29,000,000.00 29,000,000.00 18,433,794.92 06/06/2025 - -
3/12/2026 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
3/12/2026 304101397 17 Magnolia Hotel Omaha 9,119,430.39 9,119,430.39 - 11/06/2025 - -
3/12/2026 304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 11,587,394.42 10/06/2025 - -
3/12/2026 304140034 34 Walgreens-Smithfield 5,155,000.00 5,155,000.00 - 01/06/2026 - -
3/12/2026 304101400 4 Pasadena Office Tower 38,690,485.79 38,690,485.79 18,433,794.92 06/06/2025 - -
2/12/2026 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
2/12/2026 304101397 17 Magnolia Hotel Omaha 9,184,625.08 9,119,430.39 - 11/06/2025 - -
2/12/2026 304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 11,587,394.42 10/06/2025 - -
2/12/2026 304140034 34 Walgreens-Smithfield 5,155,000.00 5,155,000.00 - 01/06/2026 - -
2/12/2026 304101400 4 Pasadena Office Tower 38,690,485.79 38,690,485.79 18,433,794.92 06/06/2025 - -
1/12/2026 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
1/12/2026 304101397 17 Magnolia Hotel Omaha 9,184,625.08 9,184,625.08 - 11/06/2025 - -
1/12/2026 304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 11,587,394.42 10/06/2025 - -
1/12/2026 304140034 34 Walgreens-Smithfield 5,155,000.00 5,155,000.00 - 01/06/2026 - -
1/12/2026 304101400 4 Pasadena Office Tower 38,690,485.79 38,690,485.79 18,433,794.92 06/06/2025 - -
12/12/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
12/12/2025 304101397 17 Magnolia Hotel Omaha 9,184,625.08 9,184,625.08 - 11/06/2025 - -
12/12/2025 304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 11,587,394.42 10/06/2025 - -
12/12/2025 304101400 4 Pasadena Office Tower 38,690,485.79 38,690,485.79 18,433,794.92 06/06/2025 - -
11/13/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
11/13/2025 304101397 17 Magnolia Hotel Omaha 9,205,817.39 9,184,625.08 - 11/06/2025 - -
11/13/2025 304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 11,587,394.42 10/06/2025 - -
11/13/2025 304101400 4 Pasadena Office Tower 38,756,328.13 38,690,485.79 18,433,794.92 06/06/2025 - -
10/10/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
10/10/2025 304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 11,587,394.42 10/06/2025 - -
10/10/2025 304101400 4 Pasadena Office Tower 38,826,375.60 38,756,328.13 18,433,794.92 06/06/2025 - -
9/12/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
9/12/2025 304101397 17 Magnolia Hotel Omaha 9,249,083.69 9,228,055.69 - 08/06/2020 - -
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL APPRAISAL REDUCTION DETAIL
April 10, 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
9/12/2025 304140002 2 Selig Office Portfolio 72,000,000.00 72,000,000.00 18,000,000.00 08/06/2025 - -
9/12/2025 304101400 4 Pasadena Office Tower 38,891,736.37 38,826,375.60 18,433,794.92 06/06/2025 - -
8/12/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
8/12/2025 304101400 4 Pasadena Office Tower 38,956,865.52 38,891,736.37 18,433,794.92 06/06/2025 - -
7/11/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
7/11/2025 304101400 4 Pasadena Office Tower 39,026,225.17 38,956,865.52 18,433,794.92 06/06/2025 - -
6/12/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
6/12/2025 304101400 4 Pasadena Office Tower 39,090,877.72 39,026,225.17 18,433,794.81 06/06/2025 - -
5/12/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
4/11/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 94,129,878.79 04/07/2025 - 1,102,148.51
3/12/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 89,858,523.94 03/06/2025 - 1,102,148.51
2/12/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
1/13/2025 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
12/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
11/13/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
10/11/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
9/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
8/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
7/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
6/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
5/10/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
4/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 - 1,102,148.51
3/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 60,012,176.11 03/05/2024 159,048.94 1,102,148.51
2/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 80,098.87 943,099.57
1/12/2024 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 80,098.87 863,000.70
12/12/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 77,515.03 782,901.83
11/10/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 80,098.87 705,386.80
10/13/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 77,515.03 625,287.93
9/12/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 80,098.87 547,772.90
8/11/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 80,098.87 467,674.03
7/12/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 77,515.03 387,575.16
6/12/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 80,098.87 310,060.13
5/12/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 77,515.03 229,961.26
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL APPRAISAL REDUCTION DETAIL
April 10, 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
4/13/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.53 03/01/2023 80,098.87 152,446.23
3/10/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 28,272,960.38 03/01/2023 72,347.36 72,347.36
2/10/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
1/12/2023 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
12/12/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
11/14/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
10/13/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
9/12/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
8/12/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
7/12/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
6/10/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
5/12/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
4/12/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
3/11/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
2/11/2022 304101385 1 135 South LaSalle 100,000,000.00 100,000,000.00 - 02/06/2022 - -
9/14/2020 304101397 17 Magnolia Hotel Omaha 10,410,719.56 10,445,039.27 - 08/06/2020 - -
8/12/2020 304101397 17 Magnolia Hotel Omaha 10,427,273.39 10,410,719.56 - 08/06/2020 - -
9/12/2018 304140028 28 Infinity Corporate Center 5,924,901.16 - - - 41,157.18
8/10/2018 304140028 28 Infinity Corporate Center 5,933,247.11 5,924,901.16 2,799,940.38 08/06/2018 10,457.97 41,157.18
7/12/2018 304140028 28 Infinity Corporate Center 5,942,281.96 5,933,247.11 2,799,940.38 07/06/2018 10,120.62 30,699.21
6/12/2018 304140028 28 Infinity Corporate Center 5,950,562.60 5,942,281.96 2,799,940.38 06/06/2018 10,457.97 20,578.59
5/11/2018 304140028 28 Infinity Corporate Center 5,959,534.48 5,950,562.60 2,799,940.38 05/07/2018 10,120.62 10,120.62
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
LOAN MODIFICATION DETAIL
April 10, 2026
Modification Modification
Loan ID OMCR Property Name Date Code (4)
304101397 17 Magnolia Hotel Omaha 07/01/2020 8
304140002 2 Selig Office Portfolio 07/01/2015 8
304101400 4 Pasadena Office Tower 10/06/2025 4
Total Count = 3
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL LOAN MODIFICATION DETAIL
April 10, 2026
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
04/10/2026 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
04/10/2026 304140002 2 Selig Office Portfolio 07/01/2015 8
04/10/2026 304101400 4 Pasadena Office Tower 10/06/2025 4
03/12/2026 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
03/12/2026 304140002 2 Selig Office Portfolio 07/01/2015 8
03/12/2026 304101400 4 Pasadena Office Tower 03/04/2026 4
02/12/2026 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
02/12/2026 304140002 2 Selig Office Portfolio 07/01/2015 8
01/12/2026 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
01/12/2026 304140002 2 Selig Office Portfolio 07/01/2015 8
12/12/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
12/12/2025 304140002 2 Selig Office Portfolio 07/01/2015 8
11/13/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
11/13/2025 304140002 2 Selig Office Portfolio 07/01/2015 8
10/10/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
10/10/2025 304140002 2 Selig Office Portfolio 07/01/2015 8
09/12/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
09/12/2025 304140002 2 Selig Office Portfolio 07/01/2015 8
08/12/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
08/12/2025 304140002 2 Selig Office Portfolio 07/01/2015 8
07/11/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
07/11/2025 304140002 2 Selig Office Portfolio 07/01/2015 8
06/12/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
06/12/2025 304140002 2 Selig Office Portfolio 07/01/2015 8
05/12/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
04/11/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
03/12/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
02/12/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
01/13/2025 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
12/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
11/13/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
10/11/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
09/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 23 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL LOAN MODIFICATION DETAIL
April 10, 2026
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
08/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
07/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
06/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
05/10/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
04/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
03/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
02/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
01/12/2024 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
12/12/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
11/10/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
10/13/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
09/12/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
08/11/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
07/12/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
06/12/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
05/12/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
04/13/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
03/10/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
02/10/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
01/12/2023 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
12/12/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
11/14/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
10/13/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
09/12/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
08/12/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
07/12/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
06/10/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
05/12/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
04/12/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
03/11/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
02/11/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
01/12/2022 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
12/10/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 24 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL LOAN MODIFICATION DETAIL
April 10, 2026
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
11/15/2021 304140016 16 Crowne Plaza Bloomington 05/06/2020 8
11/15/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
10/13/2021 304140016 16 Crowne Plaza Bloomington 05/06/2020 8
10/13/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
09/13/2021 304140016 16 Crowne Plaza Bloomington 05/06/2020 8
09/13/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
08/12/2021 304140016 16 Crowne Plaza Bloomington 05/06/2020 8
08/12/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
07/12/2021 304140016 16 Crowne Plaza Bloomington 05/06/2020 8
07/12/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
06/11/2021 304140016 16 Crowne Plaza Bloomington 05/06/2020 8
06/11/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
05/12/2021 304140016 16 Crowne Plaza Bloomington 05/06/2020 8
05/12/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
04/12/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
03/12/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
02/12/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
01/12/2021 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
12/11/2020 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
11/13/2020 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
10/13/2020 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
09/14/2020 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
08/12/2020 304101397 17 Magnolia Hotel Omaha 07/01/2020 8
Reports Available at sf.citidirect.com v. 21.09.28 Page 25 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
SPECIALLY SERVICED LOAN DETAIL
April 10, 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
304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
304101397 17 13 3,500.00 9,072,943.83 9,072,943.82 17,500,000.00 10/22/2025 08/21/2025 09/02/2020
304101400 4 1 (86,438.91 ) 29,000,000.00 28,793,595.04 23,200,000.00 04/30/2025 03/20/2025
304140002 2 1 15,500.00 72,000,000.00 72,000,000.00 341,200,000.00 08/08/2025 11/24/2024
304140034 34 7 3,500.00 5,155,000.00 5,155,000.00 5,100,000.00 09/18/2025 09/16/2020
Total Count = 5 (42,411.13 ) 215,227,943.83 215,021,538.86 431,500,000.00
Reports Available at sf.citidirect.com v. 21.09.28 Page 26 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL SPECIALLY SERVICED LOANS
April 10, 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
04/10/2026 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
03/12/2026 304101385 1 1 19,444.44 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
02/12/2026 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
01/12/2026 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
12/12/2025 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
11/13/2025 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
10/10/2025 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
09/12/2025 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
08/12/2025 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
07/11/2025 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
06/12/2025 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
05/12/2025 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
04/11/2025 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
03/12/2025 304101385 1 1 19,444.44 100,000,000.00 100,000,000.00 44,500,000.00 11/29/2024 11/17/2021
02/12/2025 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
01/13/2025 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
12/12/2024 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
11/13/2024 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
10/11/2024 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
09/12/2024 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
08/12/2024 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
07/12/2024 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
06/12/2024 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
05/10/2024 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
04/12/2024 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
03/12/2024 304101385 1 1 20,138.89 100,000,000.00 100,000,000.00 67,700,000.00 01/08/2024 11/17/2021
02/12/2024 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
01/12/2024 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
12/12/2023 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
11/10/2023 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
10/13/2023 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
09/12/2023 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
Reports Available at sf.citidirect.com v. 21.09.28 Page 27 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL SPECIALLY SERVICED LOANS
April 10, 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
08/11/2023 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
07/12/2023 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
06/12/2023 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
05/12/2023 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
04/13/2023 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
03/10/2023 304101385 1 1 19,444.44 100,000,000.00 100,000,000.00 90,000,000.00 01/01/2023 11/17/2021
02/10/2023 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
01/12/2023 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
12/12/2022 304101385 1 1 20,833.33 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
11/14/2022 304101385 1 1 21,527.78 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
10/13/2022 304101385 1 10 20,833.33 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
09/12/2022 304101385 1 10 21,527.78 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
08/12/2022 304101385 1 10 21,527.78 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
07/12/2022 304101385 1 10 20,833.33 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
06/10/2022 304101385 1 10 21,527.78 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
05/12/2022 304101385 1 10 20,833.33 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
04/12/2022 304101385 1 10 21,527.78 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
03/11/2022 304101385 1 10 19,444.44 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
02/11/2022 304101385 1 13 21,527.78 100,000,000.00 100,000,000.00 130,000,000.00 01/01/2022 11/17/2021
01/12/2022 304101385 1 13 21,527.78 100,000,000.00 100,000,000.00 330,000,000.00 03/30/2015 11/17/2021
12/10/2021 304101385 1 13 8,333.33 100,000,000.00 100,000,000.00 330,000,000.00 03/30/2015 11/17/2021
05/11/2018 304101388 49 8 (22,983.33 ) 2,364,016.73 2,364,016.73 3,825,000.00 04/01/2015 04/25/2018
04/12/2018 304101388 49 9 3,500.00 2,367,605.83 2,367,605.83 3,825,000.00 04/01/2015 09/19/2017
03/12/2018 304101388 49 13 3,500.00 2,370,872.60 2,378,289.43 3,825,000.00 04/01/2015 09/19/2017
02/12/2018 304101388 49 13 3,500.00 2,375,052.68 2,378,289.43 3,825,000.00 04/01/2015 09/19/2017
01/12/2018 304101388 49 13 3,500.00 2,378,289.43 2,378,289.43 3,825,000.00 04/01/2015 09/19/2017
12/12/2017 304101388 49 13 3,500.00 2,381,513.14 2,385,033.98 3,825,000.00 04/01/2015 09/19/2017
11/10/2017 304101388 49 13 3,500.00 2,385,033.98 2,391,725.13 3,825,000.00 04/01/2015 09/19/2017
10/13/2017 304101388 49 13 1,983.33 2,388,230.50 2,391,725.13 3,825,000.00 04/01/2015 09/19/2017
04/10/2026 304101397 17 13 3,500.00 9,072,943.83 9,072,943.82 17,500,000.00 10/22/2025 08/21/2025 09/02/2020
03/12/2026 304101397 17 13 3,500.00 9,119,430.39 9,119,430.38 17,500,000.00 10/22/2025 08/21/2025 09/02/2020
02/12/2026 304101397 17 13 3,500.00 9,119,430.39 9,119,430.38 17,500,000.00 10/22/2025 08/21/2025 09/02/2020
Reports Available at sf.citidirect.com v. 21.09.28 Page 28 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL SPECIALLY SERVICED LOANS
April 10, 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
01/12/2026 304101397 17 13 3,500.00 9,184,625.08 9,270,032.13 17,500,000.00 10/22/2025 08/21/2025 09/02/2020
12/12/2025 304101397 17 13 3,500.00 9,184,625.08 9,270,032.13 17,500,000.00 10/22/2025 08/21/2025 09/02/2020
11/13/2025 304101397 17 13 3,500.00 9,184,625.08 9,270,032.13 13,000,000.00 04/20/2020 08/21/2025 09/02/2020
10/10/2025 304101397 17 13 3,500.00 9,205,817.39 9,270,032.13 13,000,000.00 04/20/2020 08/21/2025 09/02/2020
09/12/2025 304101397 17 13 1,806.45 9,228,055.69 9,270,032.13 13,000,000.00 04/20/2020 08/21/2025 09/02/2020
10/13/2020 304101397 17 8 - 10,445,039.27 10,445,039.27 13,000,000.00 04/20/2020 04/06/2020 09/02/2020
09/14/2020 304101397 17 1 3,500.00 10,445,039.27 10,445,039.27 13,000,000.00 04/20/2020 04/06/2020
08/12/2020 304101397 17 1 3,500.00 10,410,719.56 10,445,039.27 13,000,000.00 04/20/2020 04/06/2020
07/10/2020 304101397 17 98 3,500.00 10,427,273.39 10,445,039.27 16,600,000.00 04/01/2015 04/06/2020
06/12/2020 304101397 17 98 3,500.00 10,445,039.27 10,445,039.27 16,600,000.00 04/01/2015 04/06/2020
05/12/2020 304101397 17 13 3,500.00 10,461,463.26 10,461,463.26 16,600,000.00 04/01/2015 04/06/2020
04/10/2020 304101397 17 13 - 10,479,103.95 10,495,399.07 16,600,000.00 04/01/2015 04/06/2020
04/10/2026 304101400 4 1 (86,438.91 ) 29,000,000.00 28,793,595.04 23,200,000.00 04/30/2025 03/20/2025
03/12/2026 304101400 4 1 7,523.15 38,690,485.79 38,826,375.60 23,200,000.00 04/30/2025 03/20/2025
02/12/2026 304101400 4 5 8,329.20 38,690,485.79 38,826,375.60 23,200,000.00 04/30/2025 03/20/2025
01/12/2026 304101400 4 5 8,329.20 38,690,485.79 38,826,375.60 23,200,000.00 04/30/2025 03/20/2025
12/12/2025 304101400 4 5 8,060.52 38,690,485.79 38,826,375.60 23,200,000.00 04/30/2025 03/20/2025
11/13/2025 304101400 4 5 8,343.38 38,690,485.79 38,826,375.60 23,200,000.00 04/30/2025 03/20/2025
10/10/2025 304101400 4 5 8,088.83 38,756,328.13 38,956,865.52 23,200,000.00 04/30/2025 03/20/2025
09/12/2025 304101400 4 5 8,372.53 38,826,375.60 38,956,865.52 23,200,000.00 04/30/2025 03/20/2025
08/12/2025 304101400 4 13 8,386.55 38,891,736.37 39,090,877.72 23,200,000.00 04/30/2025 03/20/2025
07/11/2025 304101400 4 13 8,130.46 38,956,865.52 39,090,877.72 23,200,000.00 04/30/2025 03/20/2025
06/12/2025 304101400 4 13 8,415.40 39,026,225.17 39,090,877.72 23,200,000.00 04/30/2025 03/20/2025
05/12/2025 304101400 4 13 8,158.29 39,090,877.72 39,159,777.73 56,850,000.00 04/16/2015 03/20/2025
04/11/2025 304101400 4 13 4,630.61 39,159,777.73 39,223,957.00 56,850,000.00 04/16/2015 03/20/2025
04/10/2026 304140002 2 1 15,500.00 72,000,000.00 72,000,000.00 341,200,000.00 08/08/2025 11/24/2024
02/12/2026 304140002 2 1 15,500.00 72,000,000.00 72,000,000.00 341,200,000.00 08/08/2025 11/24/2024
01/12/2026 304140002 2 1 - 72,000,000.00 72,000,000.00 341,200,000.00 08/08/2025 11/24/2024
12/12/2025 304140002 2 1 - 72,000,000.00 72,000,000.00 341,200,000.00 08/08/2025 11/24/2024
11/13/2025 304140002 2 1 - 72,000,000.00 72,000,000.00 341,200,000.00 08/08/2025 11/24/2024
10/10/2025 304140002 2 1 (31,000.00 ) 72,000,000.00 72,000,000.00 341,200,000.00 08/08/2025 11/24/2024
09/12/2025 304140002 2 1 15,500.00 72,000,000.00 72,000,000.00 544,500,000.00 03/02/2015 11/24/2024
Reports Available at sf.citidirect.com v. 21.09.28 Page 29 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL SPECIALLY SERVICED LOANS
April 10, 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
08/12/2025 304140002 2 1 (65,500.00 ) 72,000,000.00 72,000,000.00 544,500,000.00 03/02/2015 11/24/2024
07/11/2025 304140002 2 1 15,500.00 72,000,000.00 72,000,000.00 544,500,000.00 03/02/2015 11/24/2024
06/12/2025 304140002 2 1 15,500.00 72,000,000.00 72,000,000.00 544,500,000.00 03/02/2015 11/24/2024
03/12/2025 304140002 2 1 14,000.00 72,000,000.00 72,000,000.00 544,500,000.00 03/02/2015 11/24/2024
02/12/2025 304140002 2 1 15,500.00 72,000,000.00 72,000,000.00 544,500,000.00 03/02/2015 11/24/2024
01/13/2025 304140002 2 1 15,500.00 72,000,000.00 72,000,000.00 544,500,000.00 03/02/2015 11/24/2024
12/12/2024 304140002 2 98 5,500.00 72,000,000.00 72,000,000.00 544,500,000.00 03/02/2015
11/15/2021 304140016 16 6 (25,040.30 ) - - 31,900,000.00 12/01/2014 02/04/2021
10/13/2021 304140016 16 6 2,262.80 10,840,353.25 10,840,353.25 31,900,000.00 12/01/2014 02/04/2021
09/13/2021 304140016 16 6 2,342.44 10,861,430.72 10,881,026.79 31,900,000.00 12/01/2014 02/04/2021
08/12/2021 304140016 16 6 2,346.65 10,881,026.79 10,921,389.82 31,900,000.00 12/01/2014 02/04/2021
07/12/2021 304140016 16 2 2,275.29 10,900,544.70 10,921,389.82 31,900,000.00 12/01/2014 02/04/2021
06/11/2021 304140016 16 2 2,355.30 10,921,389.82 10,940,746.76 31,900,000.00 12/01/2014 02/04/2021
05/12/2021 304140016 16 2 2,283.63 10,940,746.76 11,004,001.62 31,900,000.00 12/01/2014 02/04/2021
04/12/2021 304140016 16 2 2,363.89 10,961,436.70 11,004,001.62 31,900,000.00 12/01/2014 02/04/2021
03/12/2021 304140016 16 6 2,139.67 10,980,633.92 11,004,001.62 31,900,000.00 12/01/2014 02/04/2021
02/12/2021 304140016 16 6 2,373.01 11,004,001.62 11,041,980.66 31,900,000.00 12/01/2014 02/04/2021
01/12/2021 304140016 16 6 2,377.09 11,023,029.08 11,041,980.66 31,900,000.00 12/01/2014 11/06/2020
12/11/2020 304140016 16 98 1,920.53 11,041,980.66 11,062,279.84 31,900,000.00 12/01/2014 11/06/2020
09/12/2018 304140028 28 8 - - - 3,875,000.00 10/12/2017 09/19/2017
08/10/2018 304140028 28 2 3,500.00 5,924,901.16 5,986,255.08 3,875,000.00 10/12/2017 09/19/2017
07/12/2018 304140028 28 2 3,500.00 5,933,247.11 5,986,255.08 3,875,000.00 10/12/2017 09/19/2017
06/12/2018 304140028 28 2 3,500.00 5,942,281.96 5,986,255.08 3,875,000.00 10/12/2017 09/19/2017
05/11/2018 304140028 28 2 3,500.00 5,950,562.60 5,986,255.08 8,500,000.00 03/12/2015 09/19/2017
04/12/2018 304140028 28 2 3,500.00 5,959,534.48 5,986,255.08 8,500,000.00 03/12/2015 09/19/2017
03/12/2018 304140028 28 2 3,500.00 5,967,750.30 5,986,255.08 8,500,000.00 03/12/2015 09/19/2017
02/12/2018 304140028 28 2 3,500.00 5,978,109.06 5,994,370.49 8,500,000.00 03/12/2015 09/19/2017
01/12/2018 304140028 28 2 3,500.00 5,986,255.08 5,994,370.49 8,500,000.00 03/12/2015 09/19/2017
12/12/2017 304140028 28 2 3,500.00 5,994,370.49 6,003,183.05 8,500,000.00 03/12/2015 09/19/2017
11/10/2017 304140028 28 2 3,500.00 6,003,183.05 6,011,234.86 8,500,000.00 03/12/2015 09/19/2017
10/13/2017 304140028 28 13 1,983.33 6,011,234.86 6,019,986.09 8,500,000.00 03/12/2015 09/19/2017
04/10/2026 304140034 34 7 3,500.00 5,155,000.00 5,155,000.00 5,100,000.00 09/18/2025 09/16/2020
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL SPECIALLY SERVICED LOANS
April 10, 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
03/12/2026 304140034 34 7 3,500.00 5,155,000.00 5,155,000.00 5,100,000.00 09/18/2025 09/16/2020
02/12/2026 304140034 34 7 3,500.00 5,155,000.00 5,155,000.00 5,100,000.00 09/18/2025 09/16/2020
01/12/2026 304140034 34 7 3,500.00 5,155,000.00 5,155,000.00 5,100,000.00 09/18/2025 09/16/2020
12/12/2025 304140034 34 7 480.91 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
11/13/2025 304140034 34 2 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
10/10/2025 304140034 34 2 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
09/12/2025 304140034 34 2 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
08/12/2025 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
07/11/2025 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
06/12/2025 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
05/12/2025 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
04/11/2025 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
03/12/2025 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
02/12/2025 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
01/13/2025 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
12/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
11/13/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
10/11/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
09/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
08/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
07/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
06/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
05/10/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
04/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
03/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
02/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
01/12/2024 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
12/12/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
11/10/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
10/13/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
09/12/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
08/11/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
Reports Available at sf.citidirect.com v. 21.09.28 Page 31 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31
HISTORICAL SPECIALLY SERVICED LOANS
April 10, 2026
Most Recent Most Recent
Servicer Master Servicer
Special Servicing Ending Ending Most Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
07/12/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
06/12/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
05/12/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
04/13/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
03/10/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
02/10/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
01/12/2023 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
12/12/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
11/14/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
10/13/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
09/12/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
08/12/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
07/12/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
06/10/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
05/12/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
04/12/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
03/11/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
02/11/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
01/12/2022 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
12/10/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
11/15/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
10/13/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
09/13/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
08/12/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
07/12/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
06/11/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
05/12/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
04/12/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
03/12/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
02/12/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
01/12/2021 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
12/11/2020 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
Reports Available at sf.citidirect.com v. 21.09.28 Page 32 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31 April 10, 2026
HISTORICAL SPECIALLY SERVICED LOANS
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
11/13/2020 304140034 34 13 3,500.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
10/13/2020 304140034 34 13 1,750.00 5,155,000.00 5,155,000.00 7,900,000.00 03/08/2015 09/16/2020
Reports Available at sf.citidirect.com v. 21.09.28 Page 33 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31 April 10, 2026
UNSCHEDULED PRINCIPAL DETAIL
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)
304101397 17 0 46,486.56 - - - -
Reports Available at sf.citidirect.com v. 21.09.28 Page 34 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31 April 10, 2026
HISTORICAL UNSCHEDULED PRINCIPAL DETAIL
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)
4/10/2026 304101397 17 0 46,486.56 - - - -
2/12/2026 304101397 17 0 65,194.69 - - - -
8/12/2025 300571323 13 08/05/2025 5 12,443,759.19 - - - -
8/12/2025 304101387 43 07/15/2025 5 3,201,323.13 - - - -
8/12/2025 304140009 9 08/05/2025 5 19,093,947.34 - - - -
7/11/2025 304101388 49 07/07/2025 5 2,009,539.26 - - - -
7/11/2025 304140008 8 07/07/2025 5 20,659,396.83 - - - -
6/12/2025 304140010 10 05/29/2025 5 22,200,000.00 - - - -
6/12/2025 304101390 12 06/06/2025 5 12,863,291.87 - - - -
6/12/2025 304101399 20 06/06/2025 5 9,000,000.00 - - - -
6/12/2025 304101389 22 06/06/2025 5 7,137,168.30 - - - -
6/12/2025 304101398 23 06/06/2025 5 6,874,567.56 - - - -
6/12/2025 304140024 24 05/30/2025 5 5,781,616.27 - - - -
6/12/2025 304101391 25 05/30/2025 5 5,765,644.28 - - - -
6/12/2025 300571332 31 06/05/2025 5 4,982,241.31 - - - -
6/12/2025 304140035 35 06/06/2025 5 4,534,333.38 - - - -
6/12/2025 301461015 36 06/06/2025 5 4,027,665.86 - - - -
6/12/2025 304101396 40 06/06/2025 5 2,644,111.66 - - - -
6/12/2025 304140041 41 05/30/2025 5 3,170,841.93 - - - -
6/12/2025 304140045 45 05/30/2025 5 2,516,472.33 - - - -
6/12/2025 304101407 46 06/06/2025 5 2,477,677.43 - - - -
6/12/2025 300571326 47 06/05/2025 5 2,660,040.30 - - - -
5/12/2025 304140014 14 05/06/2025 5 11,280,703.66 - - - -
5/12/2025 304101380 15 05/06/2025 5 9,913,266.50 - - - -
5/12/2025 304140027 27 05/06/2025 5 5,351,921.86 - - - -
5/12/2025 304140038 38 05/06/2025 5 3,992,703.35 - - - -
5/12/2025 304140039 39 04/18/2025 5 3,650,567.09 - - - -
5/12/2025 304101386 42 05/05/2025 5 3,035,428.69 - - - -
5/12/2025 304140005 5 04/30/2025 5 24,508,011.66 - - - -
5/12/2025 304101392 6 05/06/2025 2 25,778,504.22 - - - -
4/11/2025 304140021 21 03/25/2025 2 7,428,747.86 - - - -
4/11/2025 300571333 26 04/04/2025 2 5,600,318.71 - - - -
3/12/2025 304140018 18 03/06/2025 5 9,788,299.63 - - - -
Reports Available at sf.citidirect.com v. 21.09.28 Page 35 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31 April 10, 2026
HISTORICAL UNSCHEDULED PRINCIPAL DETAIL
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)
3/12/2025 304140029 29 02/28/2025 2 5,126,957.32 - - - -
3/12/2025 300571331 32 03/06/2025 5 4,770,206.49 - - - -
3/12/2025 300571328 37 03/06/2025 5 4,001,512.55 - - - -
3/12/2025 304140044 44 03/06/2025 2 3,085,086.00 - - - -
3/12/2025 300571324 50 03/06/2025 5 2,033,561.79 - - - -
3/12/2025 300571327 7 03/06/2025 2 25,257,522.37 - - - -
2/12/2025 300571310 11 02/06/2025 5 16,740,126.67 - - - -
2/12/2025 301461017 19 02/06/2025 2 8,761,441.70 - - - -
2/12/2025 304140003 3 02/06/2025 2 57,864,351.61 - - - -
2/12/2025 304140033 33 02/06/2025 5 4,304,882.57 - - - -
11/13/2024 304140030 30 11/06/2024 5 5,430,806.62 - - - -
5/12/2022 304101397 17 08/06/2021 1 218,224.17 - - - -
11/15/2021 304140016 16 10/15/2021 9 10,820,594.32 - - - 1,973,242.03
9/13/2021 304101372 48 08/27/2021 9 2,333,597.23 - - - 72,353.89
9/14/2020 304101397 17 0 (34,319.71 ) - - - -
9/12/2018 304140028 28 08/28/2018 3 4,822,832.84 1,093,690.89 - - -
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Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31 April 10, 2026
LIQUIDATED LOAN DETAIL
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 37 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31 April 10, 2026
HISTORICAL LIQUIDATED LOAN
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
04/13/2023 304140016 16 - - - - - - - 600.00 - -
08/12/2022 304140028 28 - - - - - - (57,026.11 ) - - (57,026.11 )
11/15/2021 304140016 16 10,840,353.25 31,900,000.00 - 13,078,247.35 2,237,894.10 10,840,353.25 - - - -
09/12/2018 304140028 28 5,924,901.16 3,875,000.00 - 5,400,800.31 569,590.04 4,831,210.27 1,093,690.89 - - 1,093,690.89
Reports Available at sf.citidirect.com v. 21.09.28 Page 38 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31 April 10, 2026
CREFC® INVESTOR REPORTING PACKAGE LEGENDS
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 39 of 40 © Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31 April 10, 2026
NOTES
No Notes available for this deal at this time.
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Citigroup Commercial Mortgage Trust 2015-GC31 published this content on April 23, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on April 23, 2026 at 16:59 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]