Fastenal 4: Wisecup Reyne K bought 36,920 shares of Common Stock at $13… (Mar 6, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-05 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: FASTENAL CO (FAST) CIK: 0000815556 --- Reporting Owner --- Name: Wisecup Reyne K CIK: 0001246432 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-03-05 | Code: M (Exercise of derivative) Shares: +36,920 | Price: $13.00 Total Value: $479,960.00 Shares Owned After: 76,920 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-03-05 | Code: S (Open market sale) Shares: -36,920 | Price: $47.34 Total Value: $1,747,922.02 Shares Owned After: 40,000 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Employee Stock Option (Right to Buy) Date: 2026-03-05 | Code: M (Exercise of derivative) Shares: -36,920 | Price: $0.00 Exercisable: N/A | Expires: 2028-12-31 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] The option was previously reported in a filing dated 1/3/2019 as covering 11,538 securities at a strike price of $52 and the amounts were adjusted to reflect a 2-for-1 stock splits on 5/22/2019 and 5/21/2025. [F1] The option was previously reported in a filing dated 1/3/2019 as covering 11,538 securities at a strike price of $52 and the amounts were adjusted to reflect a 2-for-1 stock splits on 5/22/2019 and 5/21/2025. [F2] The option will fully vest and become exercisable over a period of five years, with 40% vesting and becoming exercisable two years following the date of grant and the remainder vesting and becoming exercisable proportionately (20%) each year thereafter. [F1] The option was previously reported in a filing dated 1/3/2019 as covering 11,538 securities at a strike price of $52 and the amounts were adjusted to reflect a 2-for-1 stock splits on 5/22/2019 and 5/21/2025. --- Footnotes (Complete Index) --- F1: The option was previously reported in a filing dated 1/3/2019 as covering 11,538 securities at a strike price of $52 and the amounts were adjusted to reflect a 2-for-1 stock splits on 5/22/2019 and 5/21/2025. F2: The option will fully vest and become exercisable over a period of five years, with 40% vesting and becoming exercisable two years following the date of grant and the remainder vesting and becoming exercisable proportionately (20%) each year thereafter. --- Signature --- /s/ /s/ John J. Milek, Attorney-in-Fact (2026-03-06)