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Form 5500, Schedule H, Part IV, Line 4i – Schedule of Assets (Held At End of Year) (Tables)
 12 Months Ended
Dec. 31, 2025
Fastenal Company & Subsidiaries 401(k) and Employee Stock Ownership Plan  
Schedule of Asset Held for Investment [Line Items]  
Form 5500, Schedule H, Part IV, Line 4i – Schedule of Assets (Held At End of Year)
Fastenal Company & Subsidiaries 401(k) and Employee Stock Ownership Plan, EIN 41-0948415, PN 001
(a)(b) Issuer and Description(c)Description of investment including maturity date, rate of interest, collateral, par, or maturity value(e) Current Value
FIAM Core Plus Commingled Cl. FCommon/Collective Trusts$10,143,783 
Invesco Stable Value Ret Cl. 1Common/Collective Trusts22,812,882 
Vanguard Target Retirement IncCommon/Collective Trusts1,841,990 
Vanguard Target Retiremt 2020Common/Collective Trusts2,513,488 
Vanguard Target Retiremt 2025Common/Collective Trusts11,726,186 
Vanguard Target Retiremt 2030Common/Collective Trusts28,010,087 
Vanguard Target Retiremt 2035Common/Collective Trusts40,681,977 
Vanguard Target Retiremt 2040Common/Collective Trusts46,738,126 
Vanguard Target Retiremt 2045Common/Collective Trusts64,560,490 
Vanguard Target Retiremt 2050Common/Collective Trusts64,780,913 
Vanguard Target Retiremt 2055Common/Collective Trusts51,731,935 
Vanguard Target Retiremt 2060Common/Collective Trusts51,094,521 
Vanguard Target Retiremt 2065Common/Collective Trusts31,146,228 
Vanguard Target Retiremt 2070Common/Collective Trusts3,792,547 
*Fastenal Company StockCommon Stock316,565,240 
American Capital WorldMutual Funds73,515,949 
American Europacific Growth R6Mutual Funds40,758,694 
Carillon Eagle Mid Cp. Grth. R6Mutual Funds16,316,711 
Fidelity 500 Index FundMutual Funds176,782,428 
Fidelity Mid Cap IndexMutual Funds20,077,295 
Fidelity Small Cap Index FundMutual Funds17,771,230 
Fidelity US Bond Index FundMutual Funds18,730,350 
John Hancock Disciplined Val. R6Mutual Funds56,716,585 
T Rowe Price Intl Discovery IMutual Funds6,544,595 
T Rowe Price Small Cap Stock IMutual Funds13,872,174 
Vanguard Federal Money Mkt. Inv.Money Market16,765,483 
BLF FedFundMoney Market591,795 
Pending settlement fundPending Settlement Funds16,289 
$1,206,599,971 
 
*Denotes a party-in-interest.
Cost column is omitted as cost is not required for participant directed investments.