NELNET INC

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K

(Mark One)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2025

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to .

COMMISSION FILE NUMBER 001-31924

NELNET, INC.

(Exact name of registrant as specified in its charter)

Nebraska 84-0748903

(State or other jurisdiction or incorporation or organization) (I.R.S Employer Identification No.)

121 South 13th Street, Suite 100

Lincoln, Nebraska 68508

(Address of principal executive officer) (Zip Code)

Registrant’s telephone number, including area code: (402)458-2370

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐No ☒

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 ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒ Accelerated filer ☐

Non-accelerated filer ☐ Smaller reporting company☐

Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No☒

The aggregate market value of the registrant’s voting common stock held by non-affiliates of the registrant on June 30, 2025 (the last business day of the registrant’s most recently completed second fiscal quarter), based upon the closing sale price of the registrant’s Class A Common Stock on that date of $121.12 per share, was $1,970,647,108. The registrant’s Class B Common Stock is not listed for public trading on any exchange or market system, but shares of Class B Common Stock are convertible into shares of Class A Common Stock at any time on a share-for-share basis. For purposes of this calculation, shares of common stock beneficially owned by any director or executive officer of the registrant or by any person who beneficially owns greater than 10% of the Class A Common Stock or who is otherwise believed by the registrant to be in a control position have been excluded, since such persons may be deemed to be affiliates of the registrant. This determination of affiliate status is not conclusive for other purposes.

As of January 31, 2026, there were 25,258,282 and 10,616,675 shares of Class A Common Stock and Class B Common Stock, par value $0.01 per share, outstanding, respectively (excluding 11,305,731 shares of Class A Common Stock held by wholly owned subsidiaries).

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive Proxy Statement to be filed for its 2026 Annual Meeting of Shareholders, scheduled to be held May 14, 2026, are incorporated by reference into Part III of this Form 10-K.

Auditor Name: KPMG LLP Auditor Location: Lincoln, Nebraska Auditor Firm ID:185

NELNET, INC.

FORM 10-K

TABLE OF CONTENTS

December 31, 2025