AUTOZONE INC (AZO) — Fundamental Analysis

AutoZone is a fundamentally resilient business — a dominant auto parts retailer that has steadily grown revenue from roughly $10.6 billion in fiscal 2016 to nearly $18.9 billion in fiscal 2025, while consistently generating net margins in the 12–15% range. Its profitability metrics are stable and its operating model is capital-efficient enough to fund aggressive store expansion. The one eyebrow-raiser is a deeply negative shareholders' equity, the result of years of share buybacks that have technically rendered the book value negative — but this is a well-understood and intentional capital allocation strategy, not a sign of financial distress. The most recent quarterly data through May 2026 shows the business continuing on its established trajectory. In plain terms: AutoZone is a cash-generating machine in a defensive industry, and its financials reflect that durability.

Snapshot & Big Picture

AutoZone operates in the "do-it-yourself" and "do-it-for-me" auto parts market — a space that tends to hold up well even in economic downturns, since people need to maintain their vehicles regardless of the broader economy. The company has compounded revenue at a mid-single to high-single digit rate over the past several years, expanded internationally, and returned enormous amounts of capital to shareholders via buybacks. The fiscal year ends in late August, so the most recent completed annual period is fiscal 2025 (ended August 30, 2025).

Latest Quarter Snapshot

The most current data available comes from the 10-Q for the quarter ended May 9, 2026 — making it more recent than the fiscal 2025 annual figures. Revenue for the quarter came in at $4.84 billion, with an EBITDA of approximately $1.07 billion. Gross margin was 52.2%, operating margin 19.1%, and net margin 13.3% — all consistent with AutoZone's established ranges and suggesting no material deterioration in the business heading into fiscal 2026. Capital expenditures in the quarter were $314.2 million, or about 6.5% of revenue, which is on the higher end of recent quarterly ratios and worth monitoring as the company continues its store rollout. The current ratio stood at 0.89, roughly in line with recent annual readings.

Profitability

AutoZone's profitability profile has been remarkably stable over the decade of data available. Gross margins have hovered in a tight band of roughly 52–54%, reflecting consistent pricing power and a relatively stable product mix. Operating margins dipped slightly in FY2018 (to about 16.1%, which may reflect investment and cost pressures that year) but quickly recovered and have remained in the 19–21% band since FY2019. Net margins similarly improved through the early 2020s, peaking near 14.9% in FY2022 before edging back slightly to 13.2% in FY2025. The FY2025 net margin dip is modest and not alarming — the gross margin remained healthy, and EBITDA of $4.22 billion in FY2025 is still very strong. Overall, the profitability trend story is one of durability rather than dramatic expansion or contraction.

Financial Health

AutoZone's balance sheet carries a notable quirk: its debt-to-equity ratio is negative across all periods. This is because the company has bought back so many shares over the years that shareholders' equity has turned negative — meaning the denominator of the ratio flips sign, making the ratio itself negative. This is not the same as financial distress. AutoZone carries substantial debt, but it also generates ample free cash flow to service it. Investors should look past the negative D/E ratio and focus on the company's earnings power and cash generation, which remain strong.

The current ratio has consistently been below 1.0 (typically 0.77–0.97 over the past several years, and 0.89 in the most recent quarter), which reflects the fact that AutoZone runs a lean working capital model — inventory is a major current asset but the company manages payables aggressively. This is a feature of the business model, not a liquidity red flag.

Capital Expenditures: CapEx has been rising in both absolute and relative terms. From $458M (3.6% of revenue) in FY2020, it climbed to $1.33 billion (7.0% of revenue) in FY2025 — a meaningful step up in capital intensity. The most recent quarter annualizes to a similar elevated level. This rising CapEx reflects AutoZone's ongoing domestic and international store expansion push. While higher CapEx compresses near-term free cash flow, it signals the company is actively investing in growth rather than harvesting a mature network. Whether this investment translates into commensurate revenue and earnings growth will be a key thing to watch over the next few fiscal years.

Growth

AutoZone has delivered consistent, if not spectacular, top-line growth across the measured windows. The three-year CAGR reflects a period of more moderate growth as the post-pandemic surge normalizes, while the five-year figure captures the strong demand uplift during and after the pandemic years. The ten-year CAGR is not available because the dataset only extends back to fiscal 2016, which is fewer than ten fiscal years from the FY2025 endpoint — not enough history to compute a full decade compound rate.

The step-down from an 8.4% five-year CAGR to a 5.2% three-year CAGR indicates that revenue growth has been decelerating somewhat as the pandemic-era tailwinds (elevated miles driven, older vehicle fleet, stimulus spending) fade. Still, mid-single-digit organic growth in a mature retail category is respectable, and accelerating CapEx investment suggests management is betting on store count expansion to sustain the growth rate going forward.

Source Filings

• 10-Q filed June 12, 2026 (period ended May 9, 2026)
• 10-Q filed March 20, 2026 (period ended February 14, 2026)