FAST
Fastenal CO
3 super-investors hold FAST worth a combined $610M. The largest position: William Von Mueffling at 2.5% of their portfolio. No cohort buying or selling was filed on the name this quarter. Cohort Conviction Score: 29 — ranked #415 of 724 scored stocks.
Why super-investors own FAST
Ownership of FAST within this cohort is narrow and stable: three managers hold a combined $610M, but the story is essentially William Von Mueffling, whose $379M position represents 2.5% of his portfolio — the highest concentration here by a wide margin. Mairs & Power Funds adds $182M at 1.9% of their portfolio, while Joel Greenblatt's stake is negligible at roughly 0.0%. Activity in 2026Q1 was nonexistent — no additions, trims, new entrants, or exits — and the broader cohort owner count has held flat at a consistent baseline for eight consecutive quarters. Interest is neither rising nor fading; this is a quiet, long-held position with no sign of momentum in either direction among the tracked universe.
AI-synthesized from 13F filings. Not investment advice.
Cohort owners over time
2016Q2 → 2026Q1How many of the cohort members held this stock each quarter.
Owners (3) · click any column to sort
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | William Von Mueffling | 2.5% | 32q | $379M | 8,166,664 |
| 2 | Mairs & Power Funds | 1.9% | 40q | $182M | 3,922,442 |
| 3 | Joel Greenblatt | <0.1% | 38q | $49M | 1,060,645 |
Owners of FAST also hold
Long US equity 13F-HR filings only. CUSIP 311900104. Not investment advice.