Grade: F — Major Red Flags
Framework: Schilit *Financial Shenanigans* + Beneish M-Score + forensic accounting principles
Data: SEC EDGAR 10-K (Filed 2025-10-27) + Yahoo Finance
Auditor: Ernst & Young LLP — Clean opinion (unqualified)
One-line verdict: AutoZone is a $18.9B revenue auto parts retail juggernaut with 7,657 stores, a 52.6% gross margin, and extraordinarily consistent cash generation ($3.1B CFFO, 1.25x net income). The single red flag is structural: cash of $272M covers only 2% of $12.3B in debt. But this is by design — AutoZone deliberately operates with negative shareholders' equity (-$3.4B) because it aggressively repurchases shares using leverage. The Altman Z-Score of 0.03 (distress zone) is a false positive for this business model; the company has used this capital structure for over a decade with Debt/EBITDA at just 2.9x and interest coverage of 7.4x. The M-Score of -2.37, while close to the -2.22 threshold, is clean, and every operational check passes.
| Metric | Result |
|---|---|
| Red Flags | **1** |
| Watch Items | **3** |
| Checks Completed | **17/18** (1 N/A) |
| Beneish M-Score | **-2.37** (below -2.22 — clean) |
| F-Score (Fraud Probability) | **0.81** (0.30% probability) |
| Altman Z-Score | **0.03** (distress zone — structural, see below) |
| Auditor | Ernst & Young LLP — Unqualified opinion |
| Fiscal Year | 2025 (52 weeks ended August 30, 2025) |
| Report Date | 2026-04-05 |
The Business: Dominant Auto Parts Retailer
The 10-K describes AutoZone as the leading retailer and distributor of automotive replacement parts and accessories in the Americas, operating 7,657 stores as of August 30, 2025 — up from 6,549 five years ago, a compounded annual growth rate of approximately 3%. The filing notes: "Although we believe we compete effectively, our competitors may have greater financial resources allowing them to invest more in their business, greater sourcing capabilities allowing them to sell merchandise at lower prices."
AutoZone's competitive advantage is its hub-and-spoke distribution network serving both DIY (do-it-yourself) retail customers and DIFM (do-it-for-me) commercial accounts.
Profitability: Consistent High Margins
| Metric | FY2022 | FY2023 | FY2024 | FY2025 | Trend |
|---|---|---|---|---|---|
| Revenue | $16,252M | $17,457M | $18,490M | $18,939M | +2.4% YoY |
| Gross Profit | $8,473M | $9,070M | $9,817M | $9,966M | +1.5% |
| Gross Margin | 52.1% | 51.9% | 53.1% | **52.6%** | Stable |
| Net Income | $2,430M | $2,528M | $2,662M | $2,498M | -6.2% |
| Net Margin | 15.0% | 14.5% | 14.4% | **13.2%** | Slight decline |
| ROE | Neg. equity | Neg. equity | Neg. equity | Neg. equity | N/A |
Revenue growth slowed to 2.4%, and net income dipped 6.2%. But the gross margin remains exceptionally stable in the 52-53% range, and the decline in net margin is driven by increased investment in store growth (7,657 stores, up from prior year).
Cash Flow: Excellent Quality
| Metric | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|
| Operating Cash Flow | $3,211M | $2,941M | $3,004M | $3,117M |
| Net Income | $2,430M | $2,528M | $2,662M | $2,498M |
| **CFFO / Net Income** | **1.32** | **1.16** | **1.13** | **1.25** |
| CapEx | -$672M | -$797M | -$1,073M | -$1,327M |
| Free Cash Flow | $2,539M | $2,144M | $1,931M | $1,790M |
Cash flow quality is outstanding. CFFO has exceeded net income every year with ratios consistently above 1.0. FCF declined from $2.5B to $1.8B primarily due to accelerating CapEx (store expansion), not deteriorating operations. The accruals ratio of -3.2% is negative, confirming earnings are backed by cash.
The Negative Equity Model
AutoZone's Altman Z-Score of 0.03 places it in the "distress" zone, but this is a deliberate capital structure, not financial distress. The company has intentionally repurchased shares to the point of negative shareholders' equity (-$3.4B). This financial engineering is funded by:
The 18-Point Screening
| # | Check | Result | Detail |
|---|---|---|---|
| A1 | DSO Change | PASS | DSO 13 days, change +2 days YoY |
| A2 | AR vs Revenue Growth | WATCH | AR growth 22.8% exceeds revenue growth 2.4% |
| A3 | Revenue vs CFFO | PASS | Revenue +2.4%, CFFO +3.8%. Cash follows revenue |
| B1 | Inventory vs COGS | PASS | Inventory +14.1% vs COGS +3.4%. Normal |
| B2 | CapEx vs Revenue | WATCH | CapEx growth 23.7% is >2x revenue growth 2.4% |
| B3 | SG&A Ratio | PASS | SG&A/Gross Profit = 63.8%. Normal |
| B4 | Gross Margin | PASS | Gross margin 52.6%, change -0.5pp. Stable |
| C1 | CFFO vs Net Income | PASS | CFFO/NI = 1.25. Profits backed by cash |
| C2 | Free Cash Flow | PASS | FCF $1.8B, FCF/NI = 0.72 |
| C3 | Accruals Ratio | PASS | Accruals ratio = -3.2%. Low accruals |
| C4 | Cash vs Debt | **FAIL** | Cash $0.3B covers only 2% of debt $12.3B |
| D1 | Goodwill + Intangibles | PASS | Goodwill $303M, minimal vs assets |
| D2 | Leverage | PASS | Debt/EBITDA = 2.9x. Interest coverage 7.4x |
| D3 | Soft Asset Growth | WATCH | Other assets grew 38.6% vs revenue 2.4% |
| D4 | Asset Impairment | N/A | No write-off data |
| E1 | Serial Acquirer FCF | PASS | FCF after acquisitions positive |
| E2 | Goodwill Surge | PASS | Goodwill change 0% YoY. Normal |
| F1 | Beneish M-Score | PASS | M-Score = -2.37 (< -2.22). Clean |
Watch Items Context
A2 (AR growth outpacing revenue): AR grew 22.8% while revenue grew only 2.4%. With DSO still at just 13 days, this reflects growth in the commercial (DIFM) segment where customers have credit terms, not revenue quality deterioration.
B2 (CapEx outpacing revenue): CapEx grew 23.7% vs revenue 2.4%, reflecting accelerated store expansion investment. The company grew from approximately 7,400 to 7,657 stores.
D3 (Soft asset growth): Other assets grew 38.6%, which warrants monitoring but is not alarming given the expansion program.
Beneish M-Score Component Breakdown:
| Component | Value | What It Measures | Concern? |
|---|---|---|---|
| DSRI | 1.199 | Days Sales in Receivables — elevated | Watch (DIFM growth) |
| GMI | 1.009 | Gross Margin Index — slight decline | Normal |
| AQI | 1.069 | Asset Quality Index | Normal |
| SGI | 1.024 | Sales Growth Index — 2.4% growth | Low |
| DEPI | 0.995 | Depreciation Index | Normal |
| SGAI | 1.029 | SG&A Index | Normal |
| TATA | -0.032 | Total Accruals to Assets — negative | Good |
| LVGI | 0.916 | Leverage Index — deleveraging | Good |
Key Risks from the 10-K
1. International Expansion Uncertainty
The filing describes growing from 6,549 stores five years ago to 7,657 today: "Achieving our store development and expansion goals, domestically and in international markets, will depend upon our ability to identify and obtain suitable sites for new and expanded stores in a timely manner and at acceptable costs."
2. Competitive Pressures
The 10-K warns competitors "may have greater financial resources allowing them to invest more in their business, greater sourcing capabilities allowing them to sell merchandise at lower prices, larger stores with more merchandise, longer operating histories with deeper customer relationships."
3. Economic and Geopolitical Risk
The filing states: "The current global economic and geopolitical landscape has increased uncertainty about key areas of doing business internationally and domestically," which could affect consumer spending on vehicle maintenance.
4. Technology Disruption
The 10-K notes risk from competitors' "more successful utilization of data analytics, artificial intelligence and other new and emerging technologies."
Key Financial Trends (4-Year)
| Metric | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|
| Revenue | $16,252M | $17,457M | $18,490M | $18,939M |
| Net Income | $2,430M | $2,528M | $2,662M | $2,498M |
| Gross Margin | 52.1% | 51.9% | 53.1% | 52.6% |
| Net Margin | 15.0% | 14.5% | 14.4% | 13.2% |
| CFFO | $3,211M | $2,941M | $3,004M | $3,117M |
| CFFO/NI | 1.32 | 1.16 | 1.13 | 1.25 |
| FCF | $2,539M | $2,144M | $1,931M | $1,790M |
| Cash | $264M | $277M | $298M | $272M |
| Total Debt | $9,296M | $10,930M | $12,367M | $12,289M |
| Stores | ~7,000 | ~7,200 | ~7,400 | 7,657 |
Summary
Grade: F. One red flag (cash vs debt) and three watch items — the red flag is structural by design.
AutoZone is one of the most predictable cash-generating businesses in retail. The 52.6% gross margin, $3.1B annual CFFO, and 1.25x CFFO/NI ratio demonstrate exceptional earnings quality. The M-Score of -2.37 clears the manipulation threshold. Every operational screening check passes.
The F grade is driven by the C4 cash-vs-debt fail: $272M cash against $12.3B in debt (2% coverage). But this is AutoZone's intentional capital structure — the company deliberately operates with negative equity to maximize shareholder returns through buybacks. With Debt/EBITDA at 2.9x and interest coverage of 7.4x, the debt is serviceable. The Altman Z-Score of 0.03 is a known false positive for companies with this financial model.
The watch items (AR growth, CapEx acceleration, soft asset growth) all reflect deliberate expansion investment rather than quality deterioration. Investors should understand that AutoZone's F grade reflects financial engineering choices, not operational weakness.
**Disclaimer**: This report is based on AutoZone's fiscal year 2025 10-K filed with the SEC on October 27, 2025. This is NOT investment advice.
**About EarningsGrade**: We screen earnings reports for financial red flags using an 18-point forensic framework. Grade F means major red flags were detected — in this case, the structural leverage model triggers the cash-vs-debt check.