Why Is FASTENAL CO (FAST) Stock Down Today?

Fastenal shares fell 6.58% to $48.05 on Wednesday, despite the company reporting third-quarter results that exceeded consensus estimates. The primary driver of the decline appears to be margin pressure, as gross margins slipped even as operating margins expanded due to SG&A leverage.

What Happened

Fastenal posted third-quarter profit of $401.6 million, or 35 cents a share, compared with $335.5 million, or 29 cents a share, a year earlier. This beat the Wall Street consensus of 34 cents per share. Revenue came in at $2.463 billion, surpassing the $2.440 billion estimate. The company reported daily sales growth of 15.5% year over year.

While operating margin expanded 90 basis points to 21.5%, gross margin declined to 44.8%. This compression was attributed to a shift in customer mix, with contract customers growing to 76.5% of sales. The company filed a Form 8-K on October 14, 2026, disclosing these results.

What The Data Shows

The stock opened at $50.91, a 1.0% gap down from the prior close of $51.43. It reached a session high of $51.00 at 7:00 AM ET before sliding to a low of $47.19 at 9:25 AM ET. Volume so far stands at 0.6 million shares, which is 0.1 times the three-month daily average.

Fundamentally, Fastenal has a market cap of $59.1 billion and a P/E ratio of 44.0. Trailing twelve-month revenue is up 12.5%, with a net margin of 15.5%. The stock has a beta of 0.69 and a dividend yield of 2.02%. It trades within a 52-week range of $38.97 to $52.91, having printed a fresh 52-week high on October 14, 2026.

Insider activity shows four sells totaling $2.5 million in the last 90 days, with no buys. Congressional disclosures indicate one buy and two sells in the same period.

What To Watch

With earnings already reported, attention turns to how the market digests the gross margin decline against the strong sales growth. Analysts will likely revise forecasts based on the new margin data.