Guide
How to compare two public companies side by side
Comparing two companies properly takes more than slapping their P/E ratios next to each other. Here's the 6-step process equity analysts actually use.
1. Normalize the fiscal periods
Some companies have non-calendar fiscal years. Apple's FY ends in September, Costco's in August, Walmart's in January. Make sure both companies' periods overlap before comparing growth or margin trends.
2. Compare segment-level revenue, not just total
Two companies with the same total revenue can be radically different. Apple's $400B is 75% products + 25% services; Microsoft's $250B is 30% cloud + 25% productivity. Total revenue alone hides the strategy.
3. Margin trends matter more than absolute margins
Different industries have different baseline gross margins. A retailer at 25% gross margin can be excellent; a software company at 60% can be struggling. Trend direction is the real signal.
4. Free cash flow > earnings
Net income can be moved around with accruals. Free cash flow (operating cash flow minus capex) is harder to fake. Compare FCF margins, not just net margins.
5. Capital allocation behaviour
Where did each company spend its FCF? Buybacks, dividends, M&A, debt paydown, R&D? This tells you what management actually believes about future opportunity.
6. Cross-read the 10-K risk factors
Two competitors often describe the same industry risk in opposite ways. The framing reveals which management team understands their business better.
ActaClear's /compare route does all six steps automatically on any two tickers — try /compare/AAPL+MSFT.
FAQs
Should I always compare against the industry median?
It's a good sanity check, but industries are heterogeneous. Better: pick 3-5 real peers (not all of an industry index) and compare against that custom set.
What ratios matter most?
Operating margin, free cash flow margin, return on invested capital (ROIC), debt-to-EBITDA, and revenue growth. Five ratios cover 80% of the comparison.
More guides: How to read a 10-K filing (without losing 3 hours of your life) · The best free tools for SEC filings analysis in 2026.