UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 1, 2015

Navient Corporation

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (302) 283-8000

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

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Navient Corporation (the “Company”) frequently provides relevant information to its investors via posting to its corporate website. On December 3, 2015, a presentation entitled “Bank of America Merrill Lynch 2015 Leveraged Finance Conference” was made available on the Company’s website at https://www.navient.com/about/investors/webcasts/.

The presentation is being furnished herewith as Exhibit 99.1. The Company also made available at the same location an audio recording containing a summary of the information contained in the presentation.

The information contained herein, or incorporated into, this Item 7.01, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.

On December 2, 2015, Yorktown Funding, LLC, a subsidiary of the Company, entered into a repurchase agreement with a financial counterparty to finance notes backed by subordinated loans made by another special purpose subsidiary of the Company to three private credit student loan securitization trusts for which the Company owns the excess distribution certificate and which have over-collateralization of greater than 50%. The all-in-cost of funds with respect to this two-year repurchase facility is approximately 3-Month LIBOR plus 335 basis points. The Company raised approximately $500 million through this repurchase transaction and will use the funds for general corporate purposes.

Also on December 1, 2015, a Company-sponsored trust, Navient Private Education Loan Trust 2015-C, priced approximately $360 million of asset-backed securities backed by seasoned non-traditional private education loans. Subject to the satisfaction of customary closing conditions, the securitization transaction is expected to close on December 10, 2015.

(d) Exhibits

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This Current Report on Form 8-K (including without limitation the Exhibits hereto), and the audio recording referenced above, contain “forward-looking statements” and information based on management’s current expectations as of the date of this report. Statements that are not historical facts, including statements about the Company’s beliefs, opinions or expectations and statements that assume or are dependent upon future events, are forward-looking statements. Forward-looking statements are subject to risks, uncertainties, assumptions and other factors that may cause actual results to be materially different from those reflected in such forward-looking statements. These factors include, among others, the risks and uncertainties set forth in Item 1A “Risk Factors” and elsewhere in Navient’s Annual Report on Form 10-K for the year ended Dec. 31, 2014 and subsequent filings with the Securities and Exchange Commission; increases in financing costs; limits on liquidity; increases in costs associated with compliance with laws and regulations; changes in accounting standards and the impact of

related changes in significant accounting estimates; any adverse outcomes in any significant litigation to which the Company is a party; credit risk associated with the Company’s exposure to third parties, including counterparties to the Company’s derivative transactions; risks inherent in the government contracting environment, including the possible loss of government contracts and potential civil and criminal penalties as a result of governmental investigations or audits; and changes in the terms of student loans and the educational credit marketplace (including changes resulting from new laws and the implementation of existing laws). The Company could also be affected by, among other things: changes in its funding costs and availability; reductions to its credit ratings or the credit ratings of the United States of America; failures of its operating systems or infrastructure, or those of third-party vendors; risks related to cybersecurity including the potential disruption of its systems or potential disclosure of confidential customer information; damage to its reputation; failures to successfully implement cost-cutting initiatives and adverse effects of such initiatives on its business; failures or delays in the planned conversion to our servicing platform of the recently acquired Wells Fargo portfolio of FFELP loans or any other FFELP or private education loan portfolio acquisitions; risks associated with restructuring initiatives; risk associated with the April 30, 2014 separation of Navient and SLM Corporation into two distinct, publicly traded companies, including failure to achieve the expected benefits of the separation; changes in the demand for educational financing or in financing preferences of lenders, educational institutions, students and their families; changes in law and regulations with respect to the student lending business and financial institutions generally; increased competition from other loan servicers; the creditworthiness of its customers; changes in the general interest rate environment, including the rate relationships among relevant money-market instruments and those of its earning assets versus its funding arrangements; changes in general economic conditions; the Company’s ability to successfully effectuate any acquisitions and other strategic initiatives; and changes in the demand for debt management services. The preparation of the Company’s consolidated financial statements also requires management to make certain estimates and assumptions including estimates and assumptions about future events. These estimates or assumptions may prove to be incorrect. All forward-looking statements contained in this report are qualified by these cautionary statements and are made only as of the date of this report. The Company does not undertake any obligation to update or revise these forward-looking statements to conform the statement to actual results or changes in its expectations.

SIGNATURES

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

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