SEC Form 4 · accession 0002043506-26-000005

FASTENAL CO · FAST

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — EVP-Strategy and Communication

Period of report

Aug 13, 2026

Accepted (ET)

Aug 17, 2026 · 11:19 am EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0000815556

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock	Aug 13, 2026	M	1,364	$13.75	A	1,364	D
Common Stock	Aug 13, 2026	S	1,364	$51.4165	D	0	D
Common Stock	Aug 13, 2026	M	7,894	$19.00	A	7,894	D
Common Stock	Aug 13, 2026	S	7,894	$51.3841	D	0	D
Common Stock^F1	holding	—	—		—	811	I	Held in 401(K) Plan

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Employee Stock Option (Right to Buy)^F2	$13.75	Aug 13, 2026	M	1,364	D	—	Dec 31, 2027	Common Stock	1,364	0	D
Employee Stock Option (Right to Buy)^F3,F4	$19.00	Aug 13, 2026	M	7,894	D	—	Dec 31, 2029	Common Stcck	7,894	0	D

F1Shares attributed to reporting person's account within issuer's 401(K) Plan and includes an additional 345 shares acquired in the account since the last report on 6/9/2025.
F2The option will vest and become exercisable over a period of eight years, with 25% of the option vesting and becoming exercisable two years after the relevant vesting period, and the remainder vesting and becoming exercisable proportionately each year thereafter.
F3The option was previously reported in a Form 3 filing on 11/6/2024 and the amounts reported on this Form 4 are adjusted to reflect a 2-for-1 stock split on May 21, 2025.
F4The option will vest and become exercisable over a period of five years, with 40% of 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.