FASTENAL CO (FAST) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-07-28 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: FASTENAL CO (FAST) CIK: 0000815556 --- Reporting Owner --- Name: Ancius Michael J CIK: 0001454708 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-07-28 | Code: M (Exercise of derivative) Shares: +3,000 | Price: $13.75 Total Value: $41,250.00 Shares Owned After: 61,690 | Ownership: D (Direct) Footnotes: [F1] The amount includes 46,668 shares held in a revocable trust over which the reporting person and his wife share vesting and investment power and 12,022 share held in the reporting person's self-directed IRA. [Transaction #2] Security: Common Stock Date: 2026-07-28 | Code: S (Open market sale) Shares: -3,000 | Price: $49.00 Total Value: $147,000.00 Shares Owned After: 58,690 | Ownership: D (Direct) Footnotes: [F1] The amount includes 46,668 shares held in a revocable trust over which the reporting person and his wife share vesting and investment power and 12,022 share held in the reporting person's self-directed IRA. --- Derivative Transactions --- [Transaction #1] Security: Stock Option (Right to Buy) Date: 2026-07-28 | Code: M (Exercise of derivative) Shares: -3,000 | Price: $0.00 Exercisable: N/A | Expires: 2027-12-31 Shares Owned After: 7,448 | Ownership: D (Direct) Footnotes: [F3] The option was issued to the reporting person pursuant to the Fastenal Company Non-employee Director Stock Option Plan and in connection with his annual director compensation whereby the option was immediately exercisable. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] Shares maintained in a Retirement Savings 401(K) Plan administered by his employer. --- Footnotes (Complete Index) --- F1: The amount includes 46,668 shares held in a revocable trust over which the reporting person and his wife share vesting and investment power and 12,022 share held in the reporting person's self-directed IRA. F2: Shares maintained in a Retirement Savings 401(K) Plan administered by his employer. F3: The option was issued to the reporting person pursuant to the Fastenal Company Non-employee Director Stock Option Plan and in connection with his annual director compensation whereby the option was immediately exercisable. --- Signature --- /s/ /s/ John J. Milek, Attorney-in-Fact (2026-07-29)