Fastenal Company
FASTLast close · Oct 16, 202651.02+0.64 (+1.27%)
Market cap$58.5B
Of the 85 managers this site tracks, 2 held Fastenal (FAST) at the end of Q2 2026, their latest 13Fs. The largest position by value was Mairs & Power's, $185.9M; William Von Mueffling's ($18.1M) follows. No Schedule 13D or 13G is on file for FAST from the activists and large holders the site follows.
Superinvestors holding FAST
| Manager | Firm | Quarter | Shares | Value |
|---|---|---|---|---|
| Mairs & Power | Mairs & Power Inc | Q2 2026 | 4M | $185.9M |
| William Von Mueffling | Cantillon Capital Management LLC | Q2 2026 | 376,044 | $18.1M |
13D/13G are SEC beneficial-ownership disclosures, triggered only above 5%; a 13F is a quarterly snapshot filed up to 45 days after quarter end. Superinvestor names link to their full portfolios under Investors.