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Side-by-side financial comparison of AAR CORP (AIR) and Builders FirstSource (BLDR). Click either name above to swap in a different company.
Builders FirstSource is the larger business by last-quarter revenue ($3.4B vs $795.3M, roughly 4.2× AAR CORP). AAR CORP runs the higher net margin — 4.4% vs 0.9%, a 3.4% gap on every dollar of revenue. On growth, AAR CORP posted the faster year-over-year revenue change (15.9% vs -12.1%). Builders FirstSource produced more free cash flow last quarter ($106.7M vs $6.2M).
AAR Corp. is an American provider of aircraft maintenance services to commercial and government customers worldwide. The company is headquartered in Wood Dale, Illinois, a Chicago suburb. The company employs about 6,000 people, operating in about 30 different countries. John Holmes is the current CEO.
Builders FirstSource, Inc. is a Fortune 500 company that is a manufacturer and supplier of building materials. The company is headquartered in Irving, Texas, and is the largest supplier of building products, prefabricated components and value-added services in the US. Builders FirstSource employs over 15,000 people throughout the USA. They serve new residential construction, repair and remodeling professionals. The company was incorporated in March 1998.
AIR vs BLDR — Head-to-Head
Income Statement — Q2 2026 vs Q4 2025
| Metric | | |
|---|---|---|
| Revenue | $795.3M | $3.4B |
| Net Profit | $34.6M | $31.5M |
| Gross Margin | 19.7% | 29.8% |
| Operating Margin | 6.0% | 1.8% |
| Net Margin | 4.4% | 0.9% |
| Revenue YoY | 15.9% | -12.1% |
| Net Profit YoY | 213.1% | -83.5% |
| EPS (diluted) | $0.90 | $0.29 |
Green = leading value per metric. Periods may differ when fiscal calendars don't align.
8-Quarter Revenue & Profit Trend
Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.
| Q4 25 | $795.3M | $3.4B | ||
| Q3 25 | $739.6M | $3.9B | ||
| Q2 25 | — | $4.2B | ||
| Q1 25 | — | $3.7B | ||
| Q4 24 | — | $3.8B | ||
| Q3 24 | — | $4.2B | ||
| Q2 24 | — | $4.5B | ||
| Q1 24 | — | $3.9B |
| Q4 25 | $34.6M | $31.5M | ||
| Q3 25 | $34.4M | $122.4M | ||
| Q2 25 | — | $185.0M | ||
| Q1 25 | — | $96.3M | ||
| Q4 24 | — | $190.2M | ||
| Q3 24 | — | $284.8M | ||
| Q2 24 | — | $344.1M | ||
| Q1 24 | — | $258.8M |
| Q4 25 | 19.7% | 29.8% | ||
| Q3 25 | 18.1% | 30.4% | ||
| Q2 25 | — | 30.7% | ||
| Q1 25 | — | 30.5% | ||
| Q4 24 | — | 32.3% | ||
| Q3 24 | — | 32.8% | ||
| Q2 24 | — | 32.8% | ||
| Q1 24 | — | 33.4% |
| Q4 25 | 6.0% | 1.8% | ||
| Q3 25 | 6.4% | 5.8% | ||
| Q2 25 | — | 7.4% | ||
| Q1 25 | — | 5.0% | ||
| Q4 24 | — | 8.0% | ||
| Q3 24 | — | 10.1% | ||
| Q2 24 | — | 11.0% | ||
| Q1 24 | — | 9.6% |
| Q4 25 | 4.4% | 0.9% | ||
| Q3 25 | 4.7% | 3.1% | ||
| Q2 25 | — | 4.4% | ||
| Q1 25 | — | 2.6% | ||
| Q4 24 | — | 5.0% | ||
| Q3 24 | — | 6.7% | ||
| Q2 24 | — | 7.7% | ||
| Q1 24 | — | 6.7% |
| Q4 25 | $0.90 | $0.29 | ||
| Q3 25 | $0.95 | $1.10 | ||
| Q2 25 | — | $1.66 | ||
| Q1 25 | — | $0.84 | ||
| Q4 24 | — | $1.65 | ||
| Q3 24 | — | $2.44 | ||
| Q2 24 | — | $2.87 | ||
| Q1 24 | — | $2.10 |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $75.6M | $181.8M |
| Total DebtLower is stronger | $952.7M | $4.4B |
| Stockholders' EquityBook value | $1.6B | $4.4B |
| Total Assets | $3.2B | $11.2B |
| Debt / EquityLower = less leverage | 0.61× | 1.02× |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $75.6M | $181.8M | ||
| Q3 25 | $80.0M | $296.2M | ||
| Q2 25 | — | $87.0M | ||
| Q1 25 | — | $115.4M | ||
| Q4 24 | — | $153.6M | ||
| Q3 24 | — | $328.1M | ||
| Q2 24 | — | $75.6M | ||
| Q1 24 | — | $697.5M |
| Q4 25 | $952.7M | $4.4B | ||
| Q3 25 | $1.0B | $4.4B | ||
| Q2 25 | — | $4.7B | ||
| Q1 25 | — | $4.5B | ||
| Q4 24 | — | $3.7B | ||
| Q3 24 | — | $3.7B | ||
| Q2 24 | — | $3.8B | ||
| Q1 24 | — | $3.7B |
| Q4 25 | $1.6B | $4.4B | ||
| Q3 25 | $1.2B | $4.3B | ||
| Q2 25 | — | $4.2B | ||
| Q1 25 | — | $4.4B | ||
| Q4 24 | — | $4.3B | ||
| Q3 24 | — | $4.4B | ||
| Q2 24 | — | $4.3B | ||
| Q1 24 | — | $5.0B |
| Q4 25 | $3.2B | $11.2B | ||
| Q3 25 | $2.9B | $11.4B | ||
| Q2 25 | — | $11.5B | ||
| Q1 25 | — | $11.4B | ||
| Q4 24 | — | $10.6B | ||
| Q3 24 | — | $10.9B | ||
| Q2 24 | — | $10.7B | ||
| Q1 24 | — | $11.2B |
| Q4 25 | 0.61× | 1.02× | ||
| Q3 25 | 0.82× | 1.03× | ||
| Q2 25 | — | 1.12× | ||
| Q1 25 | — | 1.02× | ||
| Q4 24 | — | 0.86× | ||
| Q3 24 | — | 0.83× | ||
| Q2 24 | — | 0.88× | ||
| Q1 24 | — | 0.75× |
Cash Flow & Capital Efficiency
How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.
| Metric | | |
|---|---|---|
| Operating Cash FlowLast quarter | $13.6M | $194.8M |
| Free Cash FlowOCF − Capex | $6.2M | $106.7M |
| FCF MarginFCF / Revenue | 0.8% | 3.2% |
| Capex IntensityCapex / Revenue | 0.9% | 2.6% |
| Cash ConversionOCF / Net Profit | 0.39× | 6.19× |
| TTM Free Cash FlowTrailing 4 quarters | — | $853.3M |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $13.6M | $194.8M | ||
| Q3 25 | $-44.9M | $547.7M | ||
| Q2 25 | — | $341.0M | ||
| Q1 25 | — | $132.3M | ||
| Q4 24 | — | $373.5M | ||
| Q3 24 | — | $730.0M | ||
| Q2 24 | — | $452.1M | ||
| Q1 24 | — | $317.2M |
| Q4 25 | $6.2M | $106.7M | ||
| Q3 25 | $-53.6M | $461.9M | ||
| Q2 25 | — | $252.3M | ||
| Q1 25 | — | $32.4M | ||
| Q4 24 | — | $273.8M | ||
| Q3 24 | — | $630.4M | ||
| Q2 24 | — | $364.0M | ||
| Q1 24 | — | $224.0M |
| Q4 25 | 0.8% | 3.2% | ||
| Q3 25 | -7.2% | 11.7% | ||
| Q2 25 | — | 6.0% | ||
| Q1 25 | — | 0.9% | ||
| Q4 24 | — | 7.2% | ||
| Q3 24 | — | 14.9% | ||
| Q2 24 | — | 8.2% | ||
| Q1 24 | — | 5.8% |
| Q4 25 | 0.9% | 2.6% | ||
| Q3 25 | 1.2% | 2.2% | ||
| Q2 25 | — | 2.1% | ||
| Q1 25 | — | 2.7% | ||
| Q4 24 | — | 2.6% | ||
| Q3 24 | — | 2.4% | ||
| Q2 24 | — | 2.0% | ||
| Q1 24 | — | 2.4% |
| Q4 25 | 0.39× | 6.19× | ||
| Q3 25 | -1.31× | 4.48× | ||
| Q2 25 | — | 1.84× | ||
| Q1 25 | — | 1.37× | ||
| Q4 24 | — | 1.96× | ||
| Q3 24 | — | 2.56× | ||
| Q2 24 | — | 1.31× | ||
| Q1 24 | — | 1.23× |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
Revenue Breakdown by Segment
AIR
| Commercial Customer | $268.1M | 34% |
| Repair And Engineering | $244.5M | 31% |
| Integrated Solutions | $175.8M | 22% |
| Government And Defense Customer | $85.5M | 11% |
| Expeditionary Services | $21.4M | 3% |
BLDR
| Specialty Building Products And Services | $949.0M | 28% |
| Windows Doors And Millwork | $893.5M | 27% |
| Lumber And Lumber Sheet Goods | $772.6M | 23% |
| Manufactured Products | $742.8M | 22% |
