FASTENAL CO (FAST) · 4/A SEC Filing

=== SEC Form 4/A — Statement of Changes in Beneficial Ownership === Document Type: 4/A Period of Report: 2025-08-08 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: FASTENAL CO (FAST) CIK: 0000815556 --- Reporting Owner --- Name: Soderberg John Lewis CIK: 0001607149 Role: Officer (Senior EVP-IT) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2025-08-08 | Code: M (Exercise of derivative) Shares: +34,612 | Price: $13.00 Total Value: $449,956.00 Shares Owned After: 34,612 | Ownership: D (Direct) Footnotes: [F1] The option was previously reported in a filing dated 1/3/2019 as covering 8,653 securities at a strike price of $52 and the amounts are adjusted to reflect two 2-for-1 stock splits on 5/22/2019 and 5/21/2025 respectively. [Transaction #2] Security: Common Stock Date: 2025-08-08 | Code: S (Open market sale) Shares: -34,612 | Price: $48.03 Total Value: $1,662,421.28 Shares Owned After: 0 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Employee Stock Option (Right to Buy) Date: 2025-08-08 | Code: M (Exercise of derivative) Shares: -34,612 | 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 8,653 securities at a strike price of $52 and the amounts are adjusted to reflect two 2-for-1 stock splits on 5/22/2019 and 5/21/2025 respectively. [F4] The option will vest and become exercisable over a period of five years, with 40% the option vesting and becoming exercisable two years following the date of grant, and the remainder vesting and becoming exercisable proportionately on each anniversary of the grant date. [F1] The option was previously reported in a filing dated 1/3/2019 as covering 8,653 securities at a strike price of $52 and the amounts are adjusted to reflect two 2-for-1 stock splits on 5/22/2019 and 5/21/2025 respectively. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] Shares attributed to reporting person's account within issuer's 401(K) Plan and includes additional stock split adjusted securities since the reporting person's prior report on 5/16/2025. [Holding #2] Security: Common Stock Ownership: I (Indirect) Footnotes: [F3] These shareholding amounts were inadvertently omitted from the reports filed on 8/16/2025 and 5/16/2025 and the amounts reported reflect a 2-for-1 stock split as of May 21, 2025. --- Footnotes (Complete Index) --- F1: The option was previously reported in a filing dated 1/3/2019 as covering 8,653 securities at a strike price of $52 and the amounts are adjusted to reflect two 2-for-1 stock splits on 5/22/2019 and 5/21/2025 respectively. F2: Shares attributed to reporting person's account within issuer's 401(K) Plan and includes additional stock split adjusted securities since the reporting person's prior report on 5/16/2025. F3: These shareholding amounts were inadvertently omitted from the reports filed on 8/16/2025 and 5/16/2025 and the amounts reported reflect a 2-for-1 stock split as of May 21, 2025. F4: The option will vest and become exercisable over a period of five years, with 40% the option vesting and becoming exercisable two years following the date of grant, and the remainder vesting and becoming exercisable proportionately on each anniversary of the grant date. --- Signature --- /s/ /s/ John J. Milek, Attorney-in-Fact (2026-01-27)