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FAST · Fastenal Co

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$50.31 -0.97 (-1.89%) At close · Aug 25
Market Cap
$57.73B
Shares
1.15B

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,463
Total Value: $47,166,418,081
Total Shares: 982,061,794

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 1,463 13F filers · Δ vs Mar 31, 2026
Top Holder
10.8%
Sep 2023 → Jun 2026 · range 10.8% – 15.8%
−0.1 pts
Top 5
35.2%
Sep 2023 → Jun 2026 · range 35.2% – 40.9%
−0.3 pts
Top 10
48.8%
Sep 2023 → Jun 2026 · range 48.2% – 51.7%
+0.6 pts
HHI
342
Sep 2023 → Jun 2026 · range 340 – 485
Broadly held+2

Quarterly Activity

vs Mar 31, 2026
New
136
Increased
561
Decreased
532
Sold Out
106
Unchanged
234
Holder count: +30
Institutional value: +6.4%
Shares held: +2.8%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 1,498
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 815556 CUSIP 311900104 13F (30d) 1098 filings 1062 filers Visit website Investor relations