FASTENAL CO (FAST) Institutional Ownership Changes & 13F Activity

FASTENAL CO (FAST) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Cantillon Capital Management, Mairs & Power Growth Fund, Sequoia Financial Advisors, Renaissance Technologies LLC, and Meritage Group.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2017Turtle Creek Asset ManagementSell-16,100439,600$24,042
Q4 2017Gardner Russo & QuinnBuy1,2751,275$70
Q3 2017Mairs & Power Growth FundBuy442,5342,871,088$130,864
Q3 2017Turtle Creek Asset ManagementBuy415,100455,700$20,771
Q3 2017Renaissance Technologies LLCBuy311,100917,644$41,826
Q3 2017Wedgewood PartnersBuy230,5533,704,395$168,845
Q3 2017Bares Capital ManagementBuy70,1663,662,915$166,956
Q3 2017Ariel Appreciation FundSell-37,3645,505$251
Q2 2017Wedgewood PartnersBuy1,168,3493,473,842$151,215
Q2 2017Bares Capital ManagementBuy352,8443,592,749$156,392
Q2 2017Mairs & Power Growth FundBuy340,5282,428,554$105,715
Q2 2017Renaissance Technologies LLCBuy268,800606,544$26,403
Q2 2017Turtle Creek Asset ManagementBuy40,60040,600$1,767
Q2 2017Polen Capital ManagementSell-26326,400$1,149
Q1 2017Renaissance Technologies LLCSell-1,253,900337,744$17,394
Q1 2017Bares Capital ManagementBuy402,6493,239,905$166,855
Q1 2017Wedgewood PartnersSell-188,1862,305,493$118,732
Q1 2017Mairs & Power Growth FundSell-92,3802,088,026$107,533
Q1 2017Polen Capital ManagementBuy1,67326,663$1,373
Q4 2016Wedgewood PartnersBuy2,493,6792,493,679$117,152
Q4 2016Bares Capital ManagementBuy28,5002,837,256$133,294
Q4 2016Mairs & Power Growth FundSell-7,3762,180,406$102,435
Q4 2016Polen Capital ManagementBuy1,51024,990$1,174
Q3 2016Polen Capital ManagementSell-7,139,95223,480$981
Q3 2016Renaissance Technologies LLCBuy1,104,5001,591,644$66,499
Q3 2016Bares Capital ManagementBuy651,3952,808,756$117,350
Q3 2016Mairs & Power Growth FundSell-7,6052,187,782$91,406
Q2 2016Renaissance Technologies LLCSell-1,050,600487,144$21,624
Q2 2016Polen Capital ManagementBuy764,3987,163,432$317,985
Q2 2016Bares Capital ManagementBuy213,0292,157,361$95,765

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.

Related FAST insights