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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- FASTENAL CO (FAST) stock institutional ownership
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q1 2019 | Turtle Creek Asset Management | Sell | -137,700 | 353,550 | $22,737 |
| Q4 2018 | Mairs & Power Growth Fund | Buy | 6,094 | 2,938,652 | $153,662 |
| Q4 2018 | Wedgewood Partners | Buy | 119,185 | 1,540,793 | $80,567 |
| Q4 2018 | Cantillon Capital Management | Buy | 242,647 | 3,241,382 | $169,491 |
| Q4 2018 | Bares Capital Management | Buy | 192,631 | 4,751,902 | $248,477 |
| Q4 2018 | Turtle Creek Asset Management | Buy | 16,850 | 491,250 | $25,687 |
| Q3 2018 | Mairs & Power Growth Fund | Sell | -11,317 | 2,932,558 | $170,147 |
| Q3 2018 | Renaissance Technologies LLC | Sell | -685,800 | 231,844 | $13,452 |
| Q3 2018 | Wedgewood Partners | Sell | -141,349 | 1,421,608 | $82,481 |
| Q3 2018 | Cantillon Capital Management | Sell | -202,471 | 2,998,735 | $173,987 |
| Q3 2018 | Bares Capital Management | Buy | 657,073 | 4,559,271 | $264,529 |
| Q3 2018 | Turtle Creek Asset Management | Sell | -121,850 | 474,400 | $27,525 |
| Q2 2018 | Mairs & Power Growth Fund | Sell | -58,329 | 2,943,875 | $141,689 |
| Q2 2018 | Sequoia Fund | Buy | 1,231 | 5,026 | $242 |
| Q2 2018 | Cantillon Capital Management | Buy | 3,201,206 | 3,201,206 | $154,074 |
| Q2 2018 | Wedgewood Partners | Sell | -856,679 | 1,562,957 | $75,224 |
| Q2 2018 | Bares Capital Management | Buy | 161,305 | 3,902,198 | $187,813 |
| Q2 2018 | Turtle Creek Asset Management | Buy | 155,350 | 596,250 | $28,698 |
| Q1 2018 | Mairs & Power Growth Fund | Buy | 24,068 | 3,002,204 | $163,890 |
| Q1 2018 | Sequoia Fund | Buy | 3,795 | 3,795 | $202 |
| Q1 2018 | Wedgewood Partners | Sell | -335,909 | 2,419,636 | $132,087 |
| Q1 2018 | Bares Capital Management | Buy | 7,509 | 3,740,893 | $204,215 |
| Q1 2018 | Turtle Creek Asset Management | Buy | 1,300 | 440,900 | $24,069 |
| Q4 2017 | Gardner Russo & Quinn | Buy | 1,275 | 1,275 | $70 |
| Q4 2017 | Mairs & Power Growth Fund | Buy | 107,048 | 2,978,136 | $162,874 |
| Q4 2017 | Turtle Creek Asset Management | Sell | -16,100 | 439,600 | $24,042 |
| Q4 2017 | Wedgewood Partners | Sell | -948,850 | 2,755,545 | $150,700 |
| Q4 2017 | Bares Capital Management | Buy | 70,469 | 3,733,384 | $204,179 |
| Q3 2017 | Ariel Appreciation Fund | Sell | -37,364 | 5,505 | $251 |
| Q3 2017 | Mairs & Power Growth Fund | Buy | 442,534 | 2,871,088 | $130,864 |
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.