AutoZone Q3 Sales Rise 8.4%, SSS Up 3.9%; Margin Worries Persist

What happened

AutoZone reported fiscal Q3 2026 net sales of $4.8 billion, up 8.4% year over year, with total same-store sales (SSS) increasing 3.9% and domestic SSS up 4.1%. EPS came in at $38.07, likely benefiting from revenue growth and aggressive share repurchases, though the press release omitted gross margin details. The top-line beat reflects resilient demand from an aging vehicle fleet and steady commercial market gains, reinforcing the company's strong competitive position. However, the latest DeepValue report highlights that the stock trades at a 133% premium to conservative DCF estimates, with net debt/EBITDA of 2.85x and negative equity, leaving minimal margin of safety. The lack of margin disclosure raises concern that the Q1 FY26 pattern of LIFO-driven gross margin compression and SG&A deleverage may have continued, potentially capping earnings upside.

Implication

Long-term investors should appreciate AutoZone's dominant scale and cash generation, but the current price offers limited upside. A more compelling entry would require a stock pullback or several years of EPS growth without multiple expansion. The thesis depends on whether margin pressures prove temporary and buybacks remain disciplined. Patience remains prudent.

Thesis delta

Q3 same-store sales growth of 3.9% decelerated from Q1's 5.5%, and the earnings release lacked margin details, raising the risk of persistent gross margin compression from LIFO and SG&A deleverage. The unchanged premium valuation and leverage mean the stock still offers limited margin of safety. The core thesis stays WAIT, with no catalyst to shift to BUY or SELL.