certstmt_10dccmt15gc312603.htm - Generated by SEC Publisher for SEC Filing

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

STATEMENT TO NOTEHOLDERS

March 12, 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
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	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	33
17	.	Historical Unscheduled Principal Detail	34
18	.	Liquidated Loan Detail	36
19	.	Historical Liquidated Loan Detail	37
20	.	CREFC Investor Reporting Package Legends	38
21	.	Notes	39


Reports Available at sf.citidirect.com	v. 21.09.28	Page 1 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

DISTRIBUTION SUMMARY

March 12, 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	3.688405	%	30/360	-	-	-	-	-	-	58,763,000.00
Class B	42,871,000.00	42,871,000.00	3.689405	%	30/360	-	-	-	-	-	-	42,871,000.00
Class C	33,852,000.00	33,852,000.00	3.689405	%	30/360	-	-	-	-	-	-	33,852,000.00
Class D	24,284,000.00	24,284,000.00	3.689405	%	30/360	-	-	-	-	-	-	24,284,000.00
Class E	11,000,000.00	11,000,000.00	3.689405	%	30/360	-	-	-	-	-	-	11,000,000.00
Class F	14,864,000.00	9,877,183.78	3.689405	%	30/360	-	-	-	-	-	-	9,877,183.78
Class G	12,231,000.00	-	3.689405	%	30/360	-	-	-	-	-	-	-
Class H	19,132,869.00	-	3.689405	%	30/360	-	-	-	-	-	-	-
Class S	-	-	0.000000	%	30/360	-	-	-	-	-	-	-
Class R	-	-	0.000000	%	30/360	-	-	-	-	-	-	-
Total	723,323,869.00	224,964,916.18				-	-	-	-	-	-	224,964,916.18
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				-	-	-	-	-	-	328,045,648.58


Reports Available at sf.citidirect.com	v. 21.09.28	Page 2 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

DISTRIBUTION SUMMARY - FACTORS

March 12, 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	02/27/2026	-	-	-	-	-	-	-
Class A-2	17323	YAB5	02/27/2026	-	-	-	-	-	-	-
Class A-3	17323	YAC3	02/27/2026	-	-	-	-	-	-	-
Class A-4	17323	YAD1	02/27/2026	-	-	-	-	-	-	164.91914529
Class A-AB	17323	YAE9	02/27/2026	-	-	-	-	-	-	-
Class A-S	17323	YAF6	02/27/2026	-	-	-	-	-	-	1,000.00000000
Class X-A	17323	YAL3	02/27/2026	-	-	-	-	-	-	182.41503975
Class B	17323	YAG4	02/27/2026	-	-	-	-	-	-	1,000.00000000
Class C	17323	YAH2	02/27/2026	-	-	-	-	-	-	1,000.00000000
Class D	17323	YAJ8	02/27/2026	-	-	-	-	-	-	1,000.00000000
Class E	17323	YAN9	02/27/2026	-	-	-	-	-	-	1,000.00000000
Class F	17323	YAQ2	02/27/2026	-	-	-	-	-	-	664.50375269
Class G	17323	YAS8	02/27/2026	-	-	-	-	-	-	-
Class H	17323	YAU3	02/27/2026	-	-	-	-	-	-	-
Class S	17323	YAW9	02/27/2026	-	-	-	-	-	-	-
Class R	17323	YAY5	02/27/2026	-	-	-	-	-	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 3 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

DISTRIBUTION INFORMATION - INTEREST DETAIL

March 12, 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	%	02/01-02/28	-	-	-	-	-	-	-	-	-
Class A-2	3.08400	%	3.08400	%	3.08400	%	02/01-02/28	-	-	-	-	-	-	-	-	-
Class A-3	3.49700	%	3.49700	%	3.49700	%	02/01-02/28	-	-	-	-	-	-	-	-	-
Class A-4	3.76200	%	3.76200	%	3.76200	%	02/01-02/28	138,936.09	-	-	140,246.88	-	-	-	-	-
Class A-AB	3.43100	%	3.43100	%	3.43100	%	02/01-02/28	-	-	-	-	-	-	-	-	-
Class A-S	3.68840	%	3.68840	%	3.68840	%	02/01-02/28	180,618.10	-	-	183,429.94	-	-	-	-	-
Class B	3.68940	%	3.68940	%	3.68940	%	02/01-02/28	131,807.05	-	-	134,575.45	-	-	-	-	-
Class C	3.68940	%	3.68940	%	3.68940	%	02/01-02/28	104,078.10	-	-	108,840.23	-	-	-	-	-
Class D	3.68940	%	3.68940	%	3.68940	%	02/01-02/28	74,661.25	-	-	80,564.13	-	-	-	-	-
Class E	3.68940	%	3.68940	%	3.68940	%	02/01-02/28	33,819.54	-	-	36,608.73	-	-	-	-	-
Class F	3.68940	%	3.68940	%	3.68940	%	02/01-02/28	30,367.44	-	-	33,724.76	-	-	-	-	-
Class G	3.68940	%	3.68940	%	3.68940	%	02/01-02/28	-	-	-	3,687.36	-	-	-	-	-
Class H	3.68940	%	3.68940	%	3.68940	%	02/01-02/28	-	-	-	7,243.32	-	-	-	-	-
Class S	0.00000	%	0.00000	%	0.00000	%	02/01-02/28	-	-	-	-	-	-	-	-	-
Class R	0.00000	%	0.00000	%	0.00000	%	02/01-02/28	-	-	-	-	-	-	-	-	-
Total								694,287.57	-	-	728,920.80	-	-	-	-	-
Notional
Class X-A	0.00000	%	0.00000	%	0.00000	%	02/01-02/28	-	-	-	-	-	-	-	-	-
Total								-	-	-	-	-	-	-	-	-

Grand Total								694,287.57	-	-	728,920.80	-	-	-	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 4 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL

March 12, 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	-	-	-	418,116.32	1,310.79	138,936.09	-	558,363.20	-	-	-	-	-
Class A-AB	-	-	-	-	-	-	-	-	-	-	-	-	-
Class A-S	-	-	-	914,815.47	2,811.84	180,618.10	-	1,098,245.41	-	-	-	-	-
Class B	-	-	-	900,438.40	2,768.40	131,807.05	-	1,035,013.85	-	-	-	-	-
Class C	-	-	-	1,548,909.94	4,762.13	104,078.10	-	1,657,750.17	-	-	-	-	-
Class D	-	-	-	1,919,945.20	5,902.88	74,661.25	-	2,000,509.33	-	-	-	-	-
Class E	-	-	-	907,198.96	2,789.19	33,819.54	-	943,807.69	-	-	-	-	-
Class F	-	-	-	1,091,988.79	3,357.32	30,367.44	-	1,125,713.55	-	-	-	-	-
Class G	-	-	-	1,199,335.96	3,687.36	-	-	1,203,023.32	-	-	-	-	-
Class H	-	-	-	2,355,930.10	7,243.32	-	-	2,363,173.42	-	-	-	-	-
Class S	-	-	-	-	-	-	-	-	-	-	-	-	-
Class R	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	-	-	-	11,256,679.14	34,633.23	694,287.57	-	11,985,599.94	-	-	-	-	-
Notional
Class X-A	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	-	-	-	-	-	-	-	-	-	-	-	-	-

Grand Total	-	-	-	11,256,679.14	34,633.23	694,287.57	-	11,985,599.94	-	-	-	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 5 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

DISTRIBUTION INFORMATION - PRINCIPAL DETAIL

March 12, 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	-	-	-	-	9,877,183.78	4,986,816.22	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	-	-	-	-	224,964,916.18	36,350,685.22	0.00	%	0.00	%


Reports Available at sf.citidirect.com	v. 21.09.28	Page 6 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

RECONCILIATION DETAIL

March 12, 2026


SOURCE OF FUNDS			ALLOCATION OF FUNDS

Interest Funds Available			Scheduled Fees
Scheduled Interest	235,475.10		Servicing Fee	300.05
Prepayment Interest Shortfall	-		Trustee/Certificate Administrator Fee	-
Interest Adjustments	-		Operating Advisor Fee	227.46
ASER Amount	-		CREFC Intellectual Property Royalty License Fee	87.49
Realized Loss in Excess of Principal Balance	-
			Total Scheduled Fees		615.00
Total Interest Funds Available		235,475.10	Additional Fees, Expenses, etc.
Principal Funds Available			Additional Servicing Fee	-
Scheduled Principal	-		Special Servicing Fee	1,967.59
Unscheduled Principal Collections	-		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		-
			Borrower Reimbursable Trust Fund Expenses	-
Other Funds Available
			Reimbursement of Nonrecoverable Advances to the Servicer	232,892.51
Yield Maintenance Charges	-
			Other Expenses	-
Withdrawal of Withheld Amounts from the Interest Reserve
Account	-		Total Additional Fees, Expenses, etc.		234,860.10
Deposit of Withheld Amounts to the Interest Reserve Account	-
			Distributions
Current Period Adjustment to Loan - Other	-
			Interest Distribution	-
Total Other Funds Available		-	Principal Distribution	-
			Yield Maintenance Charge Distribution	-
			Total Distributions		-




Total Funds Available		235,475.10
			Total Funds Allocated		235,475.10


Reports Available at sf.citidirect.com	v. 21.09.28	Page 7 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

OTHER INFORMATION

Interest Reserve Account Information

March 12, 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	31.101547	%
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	2,550.16


Reports Available at sf.citidirect.com	v. 21.09.28	Page 8 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

STRATIFICATION DETAIL

March 12, 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	5	224,964,916.18	100.00	3.6995	22	-0.421898
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	5	224,964,916.18	100.00	3.6995	22	-0.421898

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	138,690,485.79	61.65	3.5279	36	-1.685779
1.251 to 1.500	0	0.00	0.00	0.0000	0	0.000000
1.501 to 1.750	2	81,119,430.39	36.06	3.9649	0	1.595122
1.751 to 2.000	1	5,155,000.00	2.29	4.1400	0	1.841700
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	5	224,964,916.18	100.00	3.6995	22	-0.421898


Reports Available at sf.citidirect.com	v. 21.09.28	Page 9 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

STRATIFICATION DETAIL

March 12, 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	0	0.00	0.00	0.0000	0	0.000000
30,000,001 to 35,000,000	0	0.00	0.00	0.0000	0	0.000000
35,000,001 to 40,000,000	1	38,690,485.79	17.20	4.1300	0	1.189400
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	2	14,274,430.39	6.35	4.3125	0	1.717569
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	32.00	3.9085	0	1.588500
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	44.45	3.2950	50	-2.798200
Total	5	224,964,916.18	100.00	3.6995	22	-0.421898


Reports Available at sf.citidirect.com	v. 21.09.28	Page 10 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

STRATIFICATION DETAIL

March 12, 2026


Loan Rate

	Asset	Ending Scheduled	% of			Wtd Avg
Loan Rate Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

4.00 or Less	2	172,000,000.00	76.46	3.5518	29	-0.961907
4.01 to 4.25	2	43,845,485.79	19.49	4.1312	0	1.266092
4.26 to 4.50	1	9,119,430.39	4.05	4.4100	0	1.647400
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	5	224,964,916.18	100.00	3.6995	22	-0.421898

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	9,119,430.39	4.05	4.4100	0	1.647400
Mixed Use	0	0.00	0.00	0.0000	0	0.000000
Multifamily	0	0.00	0.00	0.0000	0	0.000000
Office	2	138,690,485.79	61.65	3.5279	36	-1.685779
Other	1	72,000,000.00	32.00	3.9085	0	1.588500
Retail	1	5,155,000.00	2.29	4.1400	0	1.841700
Self Storage	0	0.00	0.00	0.0000	0	0.000000
Total	5	224,964,916.18	100.00	3.6995	22	-0.421898


Reports Available at sf.citidirect.com	v. 21.09.28	Page 11 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

STRATIFICATION DETAIL

March 12, 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	5	224,964,916.18	100.00	3.6995	22	-0.421898
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	5	224,964,916.18	100.00	3.6995	22	-0.421898

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	5	224,964,916.18	100.00	3.6995	22	-0.421898
Total	5	224,964,916.18	100.00	3.6995	22	-0.421898


Reports Available at sf.citidirect.com	v. 21.09.28	Page 12 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

STRATIFICATION DETAIL

March 12, 2026


State

	Asset	Ending Scheduled	% of			Wtd Avg
State Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

California	1	38,690,485.79	17.20	4.1300	0	1.189400
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	44.45	3.2950	50	-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	9,119,430.39	4.05	4.4100	0	1.647400
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	1.841700
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	32.00	3.9085	0	1.588500
Total	5	224,964,916.18	100.00	3.6995	22	-0.421898


Reports Available at sf.citidirect.com	v. 21.09.28	Page 13 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

MORTGAGE LOAN DETAIL

March 12, 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	02/06/2026	4.41000	%	-	-	9,119,430.39	9,119,430.39	06/06/2025	5		13		8
304140002	2	N/A		Various	Various	02/06/2026	3.90850	%	218,876.00	-	72,000,000.00	72,000,000.00	04/06/2025	5		0		8
304140034	34	RT		North Smithfield	RI	03/01/2026	4.14000	%	16,599.10	-	5,155,000.00	5,155,000.00	06/01/2025	4		7		0
304101400	4	OF		Pasadena	CA	09/06/2025	4.13000	%	-	-	38,690,485.79	38,690,485.79	06/06/2025	5		1		4
Total	Count = 5								235,475.10	-	224,964,916.18	224,964,916.18


Reports Available at sf.citidirect.com	v. 21.09.28	Page 14 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

NOI DETAIL

March 12, 2026

Property

Ending

Preceding

Most

Most Recent

Type

Scheduled

Fiscal

Recent

Financial As of

Financial Asof

Loan ID

OMCR

)

City

State

Balance

Year NOI

NOI

Start Date

End Date

304101385

Chicago

100,000,000.00

(6,284,753.64

)

(5,947,594.42

)

Not Available

304101397

Omaha

9,119,430.39

1,222,754.56

1,387,716.97

07/01/2024

06/30/2025

304140002

N/A

Various

72,000,000.00

27,939,961.01

12,628,558.00

01/01/2025

06/30/2025

304140034

North Smithfield

5,155,000.00

401,800.00

200,900.00

01/01/2020

06/30/2020

304101400

Pasadena

38,690,485.79

2,900,108.60

2,334,548.00

Not Available

Total

Count = 5

224,964,916.18

26,179,870.53

10,604,128.55


Reports Available at sf.citidirect.com	v. 21.09.28	Page 15 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

DELINQUENCY LOAN DETAIL

March 12, 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	-	-	201,607.55	3,730,819.64	3		1		11/17/2021
304101397	17	9,119,430.38	02/06/2026	-	-	6,059.67	9,310.00	5		13		08/21/2025
304140002	2	72,000,000.00	02/06/2026	218,876.00	218,596.00	-	-	5		0		11/24/2024
304101400	4	38,826,375.60	09/06/2025	-	407,021.17	11,753.27	89,500.58	5		1		03/20/2025
Total	Count = 4	219,945,805.98		218,876.00	625,617.17	219,420.49	3,829,630.22




Reports Available at sf.citidirect.com			v. 21.09.28			Page 16 of 39								© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL

March 12, 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		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	%

	0		0		0		0		0		0		1		100,000,000		0		0		0		0		0		0
04/11/2025
	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	3.0	%	21.4	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%	0.0	%


Reports Available at sf.citidirect.com	v. 21.09.28	Page 17 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

APPRAISAL REDUCTION DETAIL

March 12, 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	9,119,430.39	-	11/06/2025	-	-
304101400	4	Pasadena Office Tower	38,690,485.79	38,690,485.79	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		224,964,916.18	224,964,916.18	124,151,068.13		-	1,102,148.51


Reports Available at sf.citidirect.com	v. 21.09.28	Page 18 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL APPRAISAL REDUCTION DETAIL


March 12, 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

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	-	-
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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 19 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL APPRAISAL REDUCTION DETAIL

March 12, 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

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
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	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 20 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL APPRAISAL REDUCTION DETAIL

March 12, 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

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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 21 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL LOAN MODIFICATION DETAIL

March 12, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (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
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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 23 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL LOAN MODIFICATION DETAIL

March 12, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

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
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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 24 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL LOAN MODIFICATION DETAIL

March 12, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

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 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

SPECIALLY SERVICED LOAN DETAIL

March 12, 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	19,444.44	100,000,000.00	100,000,000.00	44,500,000.00	11/29/2024	11/17/2021
304101397	17	13	3,500.00	9,119,430.39	9,119,430.38	17,500,000.00	10/22/2025	08/21/2025	09/02/2020
304101400	4	1	7,523.15	38,690,485.79	38,826,375.60	23,200,000.00	04/30/2025	03/20/2025
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 = 4		33,967.59	152,964,916.18	153,100,805.98	90,300,000.00


Reports Available at sf.citidirect.com	v. 21.09.28	Page 26 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL SPECIALLY SERVICED LOANS

March 12, 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	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
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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 27 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL SPECIALLY SERVICED LOANS

March 12, 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

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
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
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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 28 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL SPECIALLY SERVICED LOANS

March 12, 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

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
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
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
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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 29 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL SPECIALLY SERVICED LOANS

March 12, 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

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
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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 30 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL SPECIALLY SERVICED LOANS

March 12, 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

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
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


Reports Available at sf.citidirect.com	v. 21.09.28	Page 31 of 39	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2015-GC31

Commercial Mortgage Pass-Through Certificates, Series 2015-GC31

HISTORICAL SPECIALLY SERVICED LOANS


March 12, 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

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
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 32 of 39	© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31									March 12, 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)

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	-	-	-	-
3/12/2025	304140029	29	02/28/2025	2	5,126,957.32	-	-	-	-
Reports Available at sf.citidirect.com		v. 21.09.28			Page 34 of 39			© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31										March 12, 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	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	-	-	-




Reports Available at sf.citidirect.com		v. 21.09.28			Page 35 of 39				© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31													March 12, 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 37 of 39						© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2015-GC31
Commercial Mortgage Pass-Through Certificates, Series 2015-GC31					March 12, 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 38 of 39		© Copyright 2026 Citigroup


Reports Available at sf.citidirect.com	v. 21.09.28	Page 22 of 39	© Copyright 2026 Citigroup