Fastenal Company delivered its strongest top-line growth in years during the second quarter of 2026, with net sales rising 14.7% to $2.39 billion and diluted earnings per share up 13.8% to $0.33. The acceleration is notable because it happened against an industrial backdrop that is barely growing. The U.S. manufacturing index spent most of 2025 below the expansion threshold, yet Fastenal's daily sales rate, the company's preferred measure of organic momentum, climbed at the same 14.7% pace, helped by roughly 290 basis points of product pricing and by June sales that rose 20.5% year over year. This is a share-gain story, not a market story, and the quarter is evidence that the strategy built over the past several years is producing results.
The growth engine is a deliberate shift away from branch-count expansion toward concentrated relationships with large customers. Fastenal now reports customer Sites, distinct locations of a customer's operations where it maintains inventory, and it prioritizes sites with at least $50,000 of monthly sales potential; that cohort grew 16.5% year over year to 3,125 in the quarter while the company pruned thousands of smaller relationships. Contract customers, the national and regional accounts with significant revenue potential, generated 75.8% of quarterly sales and grew 17.6%, more than double the pace of the rest of the book. Fastenal Managed Inventory, the vending machines, bins, and scanned stocking locations embedded in customer facilities, produced 44.6% of sales, up from 44.1% a year earlier, with the installed base reaching 140,789 machine equivalent units.
The financial mechanics are worth examining because the quarter was not flattering at the gross margin line. Gross margin fell 75 basis points to 44.6% on customer mix, net price and cost pressure, transportation, and rebate timing, yet selling, general, and administrative expenses leveraged 80 basis points, so operating margin held at 21.0% and net income rose 15.9%. For the first half, operating margin improved 20 basis points to 20.7% on sales up 13.6%, and cash from operations covered 94% of net income. Management returned 83.1% of first-half earnings to shareholders through dividends and repurchases, and raised the quarterly dividend to $0.26 in July.
The obvious counterargument is price. The company's growth is carrying roughly 320 basis points of pricing contribution in the first half, most of it tied to tariffs on imported goods, and that is the portion of the acceleration most likely to fade or reverse. Gross margin has now declined in both quarters of 2026 as mix shifts toward larger, lower-margin customers, and management trimmed its 2026 signings goal for its inventory-technology devices. At $50.31, near the top of a 52-week range of $38.97 to $52.92, the stock trades at 43.7 times trailing earnings and about 36 times forward estimates, so the market is already paying for flawless execution.
What happens next depends on three variables: whether double-digit daily sales growth can persist as pricing normalizes, whether gross margin stabilizes near 44.5%, and whether the technology signings goal, now 27,000 to 29,000 machine equivalent units for 2026, is met. The balance sheet gives the company room to absorb a slower year, with $204.7 million of cash, $120 million of borrowings, and a five-year habit of returning about three-quarters of net income. On balance, this is one of the more credible compounders in industrial distribution, and the current price leaves little margin for error.