Exhibit 99.1

Navient Student Loan Trust 2015-1

Monthly Servicing Report

Distribution Date 07/25/2025

Collection Period 06/01/2025 - 06/30/2025

Navient Funding, LLC - Depositor

Navient Solutions - Master Servicer and Administrator

Wells Fargo - Indenture Trustee

Wells Fargo Bank, National Association - Eligible Lender Trustee

Navient Funding - Excess Distribution Certificateholder

Page 1 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

I.	Deal Parameters

A	Student Loan Portfolio Characteristics	02/26/2015		05/31/2025		06/30/2025
	Principal Balance	$	968,675,662.97	$	278,771,539.27	$	276,562,510.04
	Interest to be Capitalized Balance		8,452,423.99		2,709,397.34		2,618,542.96
	Pool Balance	$	977,128,086.96	$	281,480,936.61	$	279,181,053.00
	Specified Reserve Account Balance		16,379,916.00		- N/A -		- N/A -
	Adjusted Pool ⁽¹⁾	$	993,508,002.96	$	281,480,936.61	$	279,181,053.00
	Weighted Average Coupon (WAC)		6.11%		6.72%		6.72%
	Number of Loans		155,605		29,728		29,385
	Aggregate Outstanding Principal Balance - Tbill			$	36,239,297.83	$	36,262,337.03
	Aggregate Outstanding Principal Balance - SOFR			$	245,241,638.78	$	242,918,715.97
	Pool Factor				0.283544523		0.281227778
	Since Issued Constant Prepayment Rate				(3.45)%		(3.47)%

⁽¹⁾	The Specified Reserve Account balance is included in the Adjusted Pool until the Pool Balance is less than or equal to 40% of the original pool.

B	Debt Securities	Cusip/Isin	06/25/2025		07/25/2025
	A2	63939FAB6	$	250,558,722.56	$	248,293,337.20
	B	63939FAC4	$	26,700,000.00	$	26,700,000.00

C	Account Balances	06/25/2025		07/25/2025
	Reserve Account Balance	$	992,722.00	$	992,722.00
	Capitalized Interest Account Balance		-		-
	Floor Income Rebate Account	$	58,115.19	$	115,810.87
	Supplemental Loan Purchase Account		-		-

D	Asset / Liability	06/25/2025		07/25/2025
	Adjusted Pool Balance + Supplemental Loan Purchase	$	281,480,936.61	$	279,181,053.00
	Total Notes	$	277,258,722.56	$	274,993,337.20
	Difference	$	4,222,214.05	$	4,187,715.80
	Parity Ratio		1.01523		1.01523

Page 2 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

II.	Trust Activity 06/01/2025 through 06/30/2025

A	Student Loan Principal Receipts
	Borrower Principal		666,049.01
	Guarantor Principal		1,470,334.21
	Consolidation Activity Principal		1,144,449.80
	Seller Principal Reimbursement		-
	Servicer Principal Reimbursement		(72.69	)
	Rejected Claim Repurchased Principal		-
	Other Principal Deposits		-
	Total Principal Receipts	$	3,280,760.33
B	Student Loan Interest Receipts
	Borrower Interest		333,120.71
	Guarantor Interest		75,876.84
	Consolidation Activity Interest		22,235.10
	Special Allowance Payments		0.00
	Interest Subsidy Payments		0.00
	Seller Interest Reimbursement		0.00
	Servicer Interest Reimbursement		0.00
	Rejected Claim Repurchased Interest		0.00
	Other Interest Deposits		22,920.10
	Total Interest Receipts	$	454,152.75
C	Reserves in Excess of Requirement		-
D	Investment Income	$	18,520.59
E	Funds Borrowed from Next Collection Period		-
F	Funds Repaid from Prior Collection Period		-
G	Loan Sale or Purchase Proceeds		-
H	Initial Deposits to Collection Account		-
I	Excess Transferred from Other Accounts		-
J	Other Deposits		-
K	Funds Released from Capitalized Interest Account		-
L	Less: Funds Previously Remitted:
	Servicing Fees to Servicer		-
	Consolidation Loan Rebate Fees to Dept. of Education	$	(101,357.39	)
	Floor Income Rebate Fees to Dept. of Education		-
	Funds Allocated to the Floor Income Rebate Account	$	(57,695.68	)
M	AVAILABLE FUNDS	$	3,594,380.60
N	Non-Cash Principal Activity During Collection Period	$	(1,071,731.10	)
O	Non-Reimbursable Losses During Collection Period	$	43,258.61
P	Aggregate Purchased Amounts by the Depositor, Servicer or Seller		-
Q	Aggregate Loan Substitutions		-

Page 3 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

III.	2015-1 Portfolio Characteristics

		06/30/2025									05/31/2025
		Wtd Avg Coupon		# Loans		Principal		% of Principal			Wtd Avg Coupon		# Loans		Principal		% of Principal
INTERIM:	IN SCHOOL		6.96%		16	$	88,565.69		0.032%			6.96%		16	$	88,565.69		0.032%
	GRACE		6.80%		6	$	33,549.91		0.012%			6.80%		6	$	33,549.91		0.012%
	DEFERMENT		6.62%		1,715	$	14,042,396.58		5.077%			6.65%		1,686	$	13,638,318.21		4.892%

REPAYMENT:	CURRENT		6.66%		18,072	$	164,571,758.81		59.506%			6.66%		18,401	$	167,609,702.46		60.124%
	31-60 DAYS DELINQUENT		6.84%		1,335	$	13,587,606.48		4.913%			6.92%		1,326	$	12,033,247.08		4.317%
	61-90 DAYS DELINQUENT		6.91%		959	$	9,203,412.30		3.328%			6.51%		706	$	6,464,749.78		2.319%
	91-120 DAYS DELINQUENT		6.43%		537	$	4,609,211.26		1.667%			6.91%		849	$	8,251,896.22		2.960%
	> 120 DAYS DELINQUENT		6.83%		2,291	$	24,865,344.51		8.991%			6.78%		2,176	$	23,434,579.75		8.406%

	FORBEARANCE		6.83%		4,139	$	43,061,250.56		15.570%			6.85%		4,301	$	44,486,674.47		15.958%
	CLAIMS IN PROCESS		7.00%		315	$	2,499,413.94		0.904%			6.77%		261	$	2,730,255.70		0.979%

TOTAL					29,385	$	276,562,510.04		100.00	%				29,728	$	278,771,539.27		100.00	%

*	Percentages may not total 100% due to rounding

Page 4 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

IV.	2015-1 Portfolio Characteristics (cont'd)

	06/30/2025			05/31/2025
Pool Balance	$	279,181,053.00		$	281,480,936.61
Outstanding Borrower Accrued Interest	$	12,935,212.02		$	13,008,744.92
Borrower Accrued Interest to be Capitalized	$	2,618,542.96		$	2,709,397.34
Borrower Accrued Interest >30 Days Delinquent	$	2,073,787.95		$	1,950,308.69
Total # Loans		29,385			29,728
Total # Borrowers		12,804			12,958
Weighted Average Coupon		6.72	%		6.72	%
Weighted Average Remaining Term		200.99			200.03
Non-Reimbursable Losses	$	43,258.61		$	24,697.44
Cumulative Non-Reimbursable Losses	$	5,641,721.47		$	5,598,462.86
Since Issued Constant Prepayment Rate (CPR)		-3.47	%		-3.45	%
Loan Substitutions		-			-
Cumulative Loan Substitutions		-			-
Rejected Claim Repurchases		-			-
Cumulative Rejected Claim Repurchases	$	405,329.34		$	405,329.34
Unpaid Primary Servicing Fees		-			-
Unpaid Administration Fees		-			-
Unpaid Carryover Servicing Fees		-			-
Note Principal Shortfall		-			-
Note Interest Shortfall		-			-
Unpaid Interest Carryover		-			-
Non-Cash Principal Activity - Capitalized Interest	$	1,114,992.63		$	1,180,999.98
Borrower Interest Accrued	$	1,473,889.06		$	1,533,916.65
Interest Subsidy Payments Accrued	$	47,858.78		$	49,747.02
Special Allowance Payments Accrued	$	150,419.74		$	158,033.98

Page 5 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

V.	2015-1 Portfolio Statistics by School and Program

A	LOAN TYPE	Weighted Average Coupon		# LOANS		$ AMOUNT		%*
	- GSL ⁽¹⁾ - Subsidized	6.87	%		13,142		64,638,882.32	23.372	%
	- GSL - Unsubsidized	6.94	%		11,192		89,644,206.39	32.414	%
	- PLUS ⁽²⁾ Loans	8.49	%		412		8,885,650.12	3.213	%
	- SLS ⁽³⁾ Loans	8.27	%		39		325,494.45	0.118	%
	- Consolidation Loans	6.31	%		4,600		113,068,276.76	40.883	%
	Total	6.72	%		29,385	$	276,562,510.04	100.000	%

B	SCHOOL TYPE	Weighted Average Coupon		# LOANS		$ AMOUNT		%*
	- Four Year	7.01	%		19,988		139,365,283.83	50.392	%
	- Two Year	6.91	%		3,810		18,952,994.35	6.853	%
	- Technical	6.98	%		987		5,173,796.22	1.871	%
	- Other	6.31	%		4,600		113,070,435.64	40.884	%
	Total	6.72	%		29,385	$	276,562,510.04	100.000	%

*	Percentages may not total 100% due to rounding.

⁽¹⁾	Guaranteed Stafford Loan

⁽²⁾	Parent Loans for Undergraduate Students

⁽³⁾	Supplemental Loans to Students. The Unsubsidized Stafford Loan program replaced the SLS program on July 1, 1994.

Page 6 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

VI.	2015-1 Waterfall for Distributions

		Paid		Remaining Funds Balance
Total Available Funds				$	3,594,380.60
A	Trustee Fees		-	$	3,594,380.60
B	Primary Servicing Fee	$	61,249.91	$	3,533,130.69
C	Administration Fee	$	6,667.00	$	3,526,463.69
D	Class A Noteholders' Interest Distribution Amount	$	1,048,097.58	$	2,478,366.11
E	Class B Noteholders' Interest Distribution Amount	$	131,712.21	$	2,346,653.90
F	Reserve Account Reinstatement		-	$	2,346,653.90
G	Class A Noteholders' Principal Distribution Amount	$	2,265,385.36	$	81,268.54
H	Class B Noteholders' Principal Distribution Amount		-	$	81,268.54
I	Unpaid Expenses of The Trustees		-	$	81,268.54
J	Carryover Servicing Fee		-	$	81,268.54
K	Remaining Amounts to the Noteholders after the first auction date		-	$	81,268.54
L	Excess Distribution Certificateholder	$	81,268.54		-

Waterfall Triggers
A	Student Loan Principal Outstanding	$	276,562,510.04
B	Interest to be Capitalized	$	2,618,542.96
C	Capitalized Interest Account Balance		-
D	Reserve Account Balance (after any reinstatement)	$	992,722.00
E	Less: Specified Reserve Account Balance	$	(992,722.00)
F	Total	$	279,181,053.00
G	Class A Notes Outstanding (after application of available funds)	$	248,293,337.20
H	Insolvency Event or Event of Default Under Indenture		N
I	Available Funds Applied to Class A Noteholders’ Distribution Amount Before Any Amounts are Applied to the Class B Noteholders’ Distribution Amount (G>F or H=Y)		N

Page 7 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

VII.	2015-1 Distributions

Distribution Amounts

		A2			B
Cusip/Isin	63939FAB6			63939FAC4
Beginning Balance	$	250,558,722.56		$	26,700,000.00
Index	SOFR			SOFR
Spread/Fixed Rate		0.60	%		1.50	%
Record Date (Days Prior to Distribution)	1 NEW YORK BUSINESS DAY			1 NEW YORK BUSINESS DAY
Accrual Period Begin	6/25/2025			6/25/2025
Accrual Period End	7/25/2025			7/25/2025
Daycount Fraction		0.08333333			0.08333333
Interest Rate*		5.01965	%		5.91965	%
Accrued Interest Factor		0.004183042			0.004933042
Current Interest Due	$	1,048,097.58		$	131,712.21
Interest Shortfall from Prior Period Plus Accrued Interest		-			-
Total Interest Due	$	1,048,097.58		$	131,712.21
Interest Paid	$	1,048,097.58		$	131,712.21
Interest Shortfall		-			-
Principal Paid	$	2,265,385.36			-
Ending Principal Balance	$	248,293,337.20		$	26,700,000.00
Paydown Factor		0.003597563			0.000000000
Ending Balance Factor		0.394304172			1.000000000

*	Pay rates for Current Distribution. For the interest rates applicable to the next distribution date, please see https://images.navient.com/investors/data/abrate.txt.

Page 8 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

VIII.

2015-1 Reconciliations

A	Principal Distribution Reconciliation
	Notes Outstanding Principal Balance	$	277,258,722.56
	Adjusted Pool Balance	$	279,181,053.00
	Overcollateralization Amount	$	4,187,715.80
	Principal Distribution Amount	$	2,265,385.36
	Principal Distribution Amount Paid	$	2,265,385.36

B	Reserve Account Reconciliation
	Beginning Period Balance	$	992,722.00
	Reserve Funds Utilized		0.00
	Reserve Funds Reinstated		0.00
	Balance Available	$	992,722.00
	Required Reserve Acct Balance	$	992,722.00
	Release to Collection Account		-
	Ending Reserve Account Balance	$	992,722.00

C	Floor Income Rebate Account
	Beginning Period Balance	$	58,115.19
	Deposits for the Period	$	57,695.68
	Release to Collection Account		-
	Ending Balance	$	115,810.87

D	Supplemental Purchase Account
	Beginning Period Balance		-
	Supplemental Loan Purchases		-
	Transfers to Collection Account		-
	Ending Balance		-

Page 9 of 9

Trust 2015-1 Monthly Servicing Report: Collection Period 06/01/2025 - 06/30/2025, Distribution Date 07/25/2025

Navient Student Loan Trust 2015-1 10-D