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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): September 15, 2025

NN, Inc.

(Exact name of registrant as specified in its charter)

Delaware | 001-39268 | 62-1096725
(State or other jurisdiction of incorporation) | (Commission File Number) | (I.R.S. Employer Identification No.)

6210 Ardrey Kell Road, Suite 120 |  |
Charlotte, North Carolina |  | 28277
(Address of principal executive offices) |  | (Zip Code)

(980) 264-4300

(Registrant’s telephone number, including area code)

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

Check the appropriate box if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):
¨ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d- 2(b))
¨ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e- 4(c))

Securities registered pursuant to Section 12(b) of the Act:
Title of each class |  | Trading symbol |  | Name of each exchange on which registered
Common Stock, par value $0.01 |  | NNBR |  | The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
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. ¨

| ITEM 7.01 | REGULATION FD DISCLOSURE

On September 15, 2025, NN, Inc., a Delaware corporation (the “Company”), released a presentation that it intends to use from time to time in meetings with investors. A copy of the presentation is attached hereto as Exhibit 99.1. The investor presentation is also available on the “Investor Relations” page of the Company’s website at https://investors.nninc.com. The information found on, or otherwise accessible through, the Company’s website is not incorporated by reference herein.

Pursuant to the rules and regulations of the U.S. Securities and Exchange Commission, the information furnished pursuant to this Item 7.01 of this Current Report (including Exhibit 99.1) is deemed to have been furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any other filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

The Company routinely uses its investor relations website (https://investors.nninc.com) to post presentations to investors and other important information, including information that may be material. Accordingly, the Company encourages investors and others interested in the Company to review the information it makes public on its investor relations website.

| ITEM 9.01 | FINANCIAL STATEMENTS AND EXHIBITS

(d) Exhibits.

Exhibit No. |  | Description of Exhibit
99.1 |  | Investor Presentation, dated September 2025
104 |  | Cover Page Interactive Data File (embedded within the Inline XBRL document)

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.
Date: | September 15, 2025

| NN, INC.
| By: | /s/ Christopher H. Bohnert
| Name: | Christopher H. Bohnert
| Title: | Senior Vice President and Chief Financial Officer