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Comparable Company Analysis: How to Pick a Peer Set You Can Defend

Valuation • Beginner Investing • 8 min

"Just find some comps" sounds like the easy part of a valuation — pick a few similar companies, average their multiples, apply it to the company you're analyzing. In practice, the peer set you choose can move the resulting valuation as much as, or more than, the multiple itself. Building one you can actually defend takes real discipline, not just a shared industry label.

Start broad — same sector, similar size range — then narrow using the criteria that actually drive value: similar business model, not just similar products, similar end markets and customers, similar growth stage, similar margin structure, and comparable geographic footprint. Two companies can share a sector classification and still be poor comps for each other — a capital-light software company and a capital-intensive semiconductor manufacturer both get labeled "technology," but their margins, growth drivers, and appropriate multiples have almost nothing in common.

Insider Angle: once you have a defensible peer set, use the median multiple rather than a simple average — a handful of comps is easily skewed by one outlier trading at an unusual multiple due to temporary bad news, a pending acquisition, or a fundamentally different growth stage, and the median is far more resistant to that kind of distortion. Watch out too for stale peer sets: a comp list built two years ago might no longer reflect the best available benchmark if better, more directly comparable companies have gone public since, or if an old comp's business has since diverged from the subject company's.
Try This: Pick a company and try to build your own peer set of 4-5 comps. For each one, write down the SPECIFIC reason it belongs on the list, not just "same industry," but similar business model, growth rate, or margin profile. If you can't articulate a specific reason for one of them, it probably doesn't belong.
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