Form4insider filings, from the source

Company · CIK 0000815556 · SIC 5200 — Retail-Building Materials, Hardware, Garden Supply · Nasdaq

FASTENAL CO · FAST

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $2.5M · 4net −$2.5M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesSep 2024Jan 2025May 2025Sep 2025Jan 2026May 2026Sep 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 13, 2026 SForm 4 →Aug 17, 11:19 am EDTDonnalee Kathleen PapenfussEVP-Strategy and Communication9,258$51.39$475,7580−100%
Aug 13, 2026 MForm 4 →Aug 17, 11:19 am EDTDonnalee Kathleen PapenfussEVP-Strategy and Communication9,258$18.23$168,7417,894—
Aug 13, 2026 GForm 4 →Aug 17, 11:16 am EDTMichael J AnciusDirector400——58,290—
Aug 10, 2026 SForm 4 →Aug 11, 4:08 pm EDTMichael J AnciusDirector3,000$52.00$156,00058,690−4.86%
Aug 10, 2026 MForm 4 →Aug 11, 4:08 pm EDTMichael J AnciusDirector3,000$13.75$41,25061,690—
Aug 5, 2026 SForm 4 →Aug 6, 5:41 pm EDTRita J. HeiseDirector34,964$50.05$1,750,10220,000−63.6%
Aug 5, 2026 MForm 4 →Aug 6, 5:41 pm EDTRita J. HeiseDirector34,964$17.28$604,31644,964—
Jul 28, 2026 SForm 4 →Jul 29, 4:13 pm EDTMichael J AnciusDirector3,000$49.00$147,00058,690−4.86%
Jul 28, 2026 MForm 4 →Jul 29, 4:13 pm EDTMichael J AnciusDirector3,000$13.75$41,25061,690—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 13, 2026 MForm 4 →Aug 17, 11:19 am EDTDonnalee Kathleen PapenfussEVP-Strategy and Communication9,258——0—
Aug 10, 2026 MForm 4 →Aug 11, 4:08 pm EDTMichael J AnciusDirector3,000——4,448—
Aug 5, 2026 MForm 4 →Aug 6, 5:41 pm EDTRita J. HeiseDirector34,964——0—
Jul 28, 2026 MForm 4 →Jul 29, 4:13 pm EDTMichael J AnciusDirector3,000——7,448—