FAST: Financial results

Item 2.02. Results of Operations and Financial Condition. On October 14, 2026, the Registrant issued a press release announcing the results of its most recently ended fiscal quarter, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference. Item 9.01. Financial Statements and Exhibits. INDEX TO EXHIBITS Exhibit Number Description of Document 99.1 Press release dated October 14, 2026. 104 The cover page from the Current Report on Form 8-K formatted in Inline XBRL. SIGNATURE 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. Fastenal Company (Registrant) October 14, 2026 By: /s/ SHERYL A. LISOWSKI (Date) Sheryl A. Lisowski Executive Vice President - Chief Accounting Officer and Treasurer