UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-D

ASSET-BACKED ISSUER

DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

For the distribution period from

August 1, 2025 to August 31, 2025

Commission File Number of issuing entity: 333-166301-16

Central Index Key of issuing entity: 1589224

SLM STUDENT LOAN TRUST 2013-6

(Exact name of issuing entity as specified in its charter)

Commission File Number of depositor: 333-166301

Central Index Key of depositor: 0000949114

NAVIENT FUNDING, LLC

(Exact name of depositor as specified in its charter)

Central Index Key of sponsor: 0001601725

NAVIENT SOLUTIONS, LLC

(Exact name of sponsor as specified in its charter)

Mai Le-Cao (571) 592-8608

(Name and telephone number, including area code, of the person to contact in connection with this filing)

Delaware		04-3480392
(State or other jurisdiction of incorporation or organization of the issuing entity)		04-3480392 54-1843973 (I.R.S. Employer Identification Nos.)

c/o Deutsche Bank Trust Company Delaware

111 Continental Drive, Suite 102

Newark, Delaware

19713

(Zip Code)

(Address of principal executive offices of issuing entity)

(571) 592-8608

(Telephone number including area code)

Not Applicable

(Former name, former address, if changed since last report)

Registered/reporting pursuant to (check one)

				Name of exchange
Title of class	Section 12(b)	Section 12(g)	Section 15(d)	(If Section 12(b))

Class A Student Loan Backed Notes	☐	☐	☑
Class B Student Loan Backed Notes	☐	☐	☑

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ☑ No ☐

PART I — DISTRIBUTION INFORMATION

Item 1.

Distribution and Pool Performance Information.

On September 25, 2025, SLM Student Loan Trust 2013-6 (the “Trust”) made its regular monthly distribution of funds to holders of its Student Loan-Backed Notes. Navient Solutions, LLC (formerly, Navient Solutions, Inc.), as the administrator, distributed the Monthly Distribution Report for the Trust for the period identified on the cover of this Form 10-D to the Indenture Trustee, on behalf of the Trust’s noteholders of record. This Monthly Distribution Report is attached to this Report as Exhibit 99.1. This report as well as other information about the Trust is also available on the Administrator’s website at http://www.navient.com/about/investors/debtasset/slmsltrusts/. There is no activity to report under Rule 15Ga-1(a) under the Securities Exchange Act of 1934 with respect to the Trust for the distribution period referred to in the second sentence of this paragraph. The depositor of the Trust filed its most recent report on Form ABS-15G on February 7, 2025 (such report is available at www.sec.gov under the depositor’s CIK No. 0000949114).

PART II — OTHER INFORMATION

Item 2.

Legal Proceedings.

The following is disclosure received from Navient Solutions, LLC (formerly, Navient Solutions, Inc.) (“Navient Solutions”), the servicer for this transaction.

Navient Corporation (“Navient”) has been named as defendant in a number of putative class action and other cases alleging violations of various state and federal consumer protection laws including the Telephone Consumer Protection Act, the Consumer Financial Protection Act of 2010 (CFPA), the Fair Credit Reporting Act (FCRA), the Fair Debt Collection Practices Act (FDCPA), in adversarial proceedings under the United States Bankruptcy Code, and various state consumer protection laws. At this point in time, Navient is unable to anticipate the timing of a resolution or the impact that these legal proceedings may have on its consolidated financial position, liquidity, results of operation or cash flows. As a result, it is not possible at this time to estimate a range of potential exposure, if any, for amounts that may be payable in connection with these matters and loss contingency accruals have not been established. It is possible that an adverse ruling or rulings may have a material adverse impact on Navient, Navient Solutions and/or their affiliates or on the financial ability of the depositor, the servicer or a seller to fulfill an obligation to purchase or repurchase trust student loans in connection with a breach of representation, warranty or covenant.

The following is disclosure received from Deutsche Bank National Trust Company and Deutsche Bank Trust Company Americas. Deutsche Bank National Trust Company (“DBNTC”) and Deutsche Bank Trust Company Americas (“DBTCA”) have been sued by investors in civil litigation concerning their role as trustees for certain residential (“RMBS”) trusts.

On November 7, 2014, the National Credit Union Administration Board (“NCUA”), as an investor in 121 RMBS trusts, filed a complaint in the U.S. District Court for the Southern District of New York against DBNTC as trustee of those trusts, alleging violations of the U.S. Trust Indenture Act of 1939 (“TIA”) and the New York Streit Act (“Streit Act”) for DBNTC’s alleged failure to perform certain purported statutory and contractual duties. On March 5, 2015, NCUA amended its complaint to assert claims as an investor in 97 of the 121 RMBS trusts that were the subject of its first complaint. The amended complaint alleged violations of the TIA and Streit Act, as well as breach of contract, breach of fiduciary duty, breach of the covenant of good faith, negligence, gross negligence and negligent misrepresentation. NCUA’s complaint alleged that the trusts at issue suffered total realized collateral losses of U.S. $17.2 billion, but the complaint did not include a demand for money damages in a sum certain. On May 1, 2015, DBNTC filed a motion to dismiss the amended complaint. On July 31, 2018, the court issued an order that, among other things, denied DBNTC’s motion to dismiss without prejudice to its renewal. On August 31, 2018, NCUA filed a letter informing the court that it intended to: (i) drop all of its claims as to 60 of the 97 trusts at issue; (ii) drop its claims as to certain, but not all, certificates for 3 additional trusts; and (iii) move for leave to file an amended complaint bringing claims as to the remaining 37 trusts at issue. On October 5, 2018, NCUA filed a motion for leave to file a second amended complaint that asserted claims as to only 37 of the 97 trusts that were originally at issue, and added new claims for a declaratory judgment and breach of contract arising out of the payment from trust funds of DBNTC’s legal fees and expenses in NCUA’s action and in other actions brought by investors against DBNTC for alleged breaches of its duties as an RMBS trustee. On November 5, 2018, DBNTC filed a motion to stay NCUA’s new claims relating to payment from trust funds of DBNTC’s legal fees and expenses and all related discovery. On October 15, 2019, the court: (i) granted in part NCUA’s motion for leave to file a second amended complaint; and (ii) granted DBNTC’s motion to stay NCUA’s new claims relating to payment from trust funds of DBNTC’s legal fees and expenses and all related discovery. The court permitted NCUA to file a second amended complaint asserting claims for: (i) breach of contract arising out of DBNTC’s alleged failure to perform certain purported statutory and contractual duties; and (ii) declaratory judgment and breach of contract arising out of the payment from trust funds of DBNTC’s legal fees and expenses. The court denied NCUA’s request to assert additional claims for: (i) negligence and gross negligence; and (ii) breach of fiduciary duty. On October 21, 2019, NCUA filed a second amended complaint. On November 15, 2019, DBNTC filed an answer to the second amended complaint. On June 11, 2021, NCUA filed a third amended complaint, the substance of which was unchanged from the second amended complaint. On July 1, 2021, DBNTC filed an answer to the third amended complaint. On October 5, 2021, NCUA filed a fourth amended complaint, the substance of which was unchanged from the third amended complaint. On October 25, 2021, DBNTC filed an answer to the fourth amended complaint. On February 4, 2022, the parties filed a stipulation in which NCUA agreed to voluntarily dismiss with prejudice all claims as to 19 trusts. On February 28, 2022, both parties filed motions for partial summary judgment, which have been fully briefed. On August 11, 2025, the court granted in part and denied in part both motions. Discovery is ongoing.

Item 3.

Sales of Securities and Use of Proceeds. None.

Item 4.

Defaults Upon Senior Securities. None.

Item 5.

Submission of Matters to a Vote of Security Holders. None.

Item 6.

Significant Obligors of Pool Assets. No updates to report.

Item 7.

Change in Sponsor Interest in the Securities. None.

Item 8.

Significant Enhancement Provider Information. No updates to report.

Item 9.

Other Information. None.

Item 10.

Exhibits.

(a)

99.1 Monthly Distribution Report for SLM Student Loan Trust 2013-6 in relation to the distribution for September 2025.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Trust has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: October 8, 2025	SLM STUDENT LOAN TRUST 2013-6

	By:	NAVIENT SOLUTIONS, LLC, the Administrator

	By:	/s/ MAI LE-CAO
	Name:	Mai Le-Cao
	Title:	Managing Director

INDEX TO EXHIBITS

Exhibit Number		Exhibit

99.1		Monthly Distribution Report for SLM Student Loan Trust 2013-6 in relation to the distribution for September 2025.

SLM Student Loan Trust 2013-6 10-D