FASTENAL CO (FAST) Stock Institutional Trading Activity


FASTENAL CO (FAST) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Cantillon Capital Management, Mairs & Power Growth Fund, Sequoia Financial Advisors, and Meritage Group. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Renaissance Technologies LLCBuy262,188417,476$16,753,312
Q4 2025Mairs & Power Growth FundSell-51,5374,667,499$187,306,719
Q4 2025Cantillon Capital ManagementBuy70,1839,266,888$371,880,216
Q3 2025Sequoia Financial AdvisorsBuy5,22349,664$2,435,544
Q3 2025Mairs & Power Growth FundSell-653,7234,719,036$231,421,506
Q3 2025Cantillon Capital ManagementSell-101,3289,196,705$451,006,413
Q2 2025Sequoia Financial AdvisorsBuy28,41844,441$1,866,523
Q2 2025Mairs & Power Growth FundBuy2,682,9045,372,759$225,655,861
Q2 2025Cantillon Capital ManagementBuy4,513,9859,298,033$390,517,386
Q1 2025Sequoia Financial AdvisorsBuy5,01516,023$1,242,559
Q1 2025Mairs & Power Growth FundSell-19,5762,689,855$208,598,279
Q1 2025Cantillon Capital ManagementSell-147,8804,784,048$371,002,922
Q4 2024Sequoia Financial AdvisorsBuy1,87111,008$791,569
Q4 2024Renaissance Technologies LLCSell-72,200155,288$11,166,760
Q4 2024Mairs & Power Growth FundSell-22,4992,709,431$194,835,205
Q4 2024Cantillon Capital ManagementBuy26,2544,931,928$354,654,943
Q3 2024Sequoia Financial AdvisorsBuy1659,137$652,556
Q3 2024Renaissance Technologies LLCSell-371,800227,488$16,247,193
Q3 2024Mairs & Power Growth FundBuy68,6172,731,930$195,114,462
Q3 2024Cantillon Capital ManagementSell-146,4624,905,674$350,363,237
Q2 2024Meritage GroupBuy3,9233,923$246,521
Q2 2024Sequoia Financial AdvisorsBuy7558,972$563,782
Q2 2024Renaissance Technologies LLCBuy111,400599,288$37,659,258
Q2 2024Mairs & Power Growth FundSell-28,7832,663,313$167,362,608
Q2 2024Cantillon Capital ManagementSell-257,1905,052,136$317,476,226
Q1 2024Matrix Private Capital GroupSell-1,3594,061$313,266
Q1 2024Sequoia Financial AdvisorsSell-2,2998,217$633,824
Q1 2024Mairs & Power Growth FundSell-498,5012,692,096$207,668,309
Q1 2024Cantillon Capital ManagementSell-106,9795,309,326$409,561,407
Q4 2023Giverny CapitalSell-8008,154$528,135

Frequently asked questions about FAST activity

  • Which institutional owners are buying FAST?

    Institutional owners buying FAST include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in FAST activity?

    "Buy" means an investor increased their reported position in FAST compared to the prior reporting period. This reflects growing exposure to FASTENAL CO (FAST) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in FAST increasing?

    Institutional interest in FAST can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.