Building a peer set that survives committee questions

A peer set is not a marketing collage. If the companies do not share a business model, listing venue, or disclosure rhythm, ESG factor comparison turns into a tour of apples and scaffolding.

Start from the mandate question

Write the question the committee will actually ask. “Which bank discloses related-party exposure more clearly?” needs a bank peer set. “Which cement producer reports kiln emissions with third-party limited assurance?” needs producers, not a mixed industrials basket. Vague questions produce vague tables.

Prefer same-exchange density

Comparing a SET-listed issuer to a foreign dual-listing can be valid, but you must record which rulebook shapes board independence and which language version of the sustainability report you treat as primary. Same-exchange peer sets reduce silent definition drift.

Size for reading, not for spectacle

Four to eight names usually leave room for narrative. Twelve names tempt scorecards. If you need a wide screen, run a materiality briefing first, then a tighter comparison on the shortlist.

Document exclusions early

If you drop an issuer for thin disclosure, say so in the peer-set memo. Committees notice absences. An exclusion note prevents the suspicion that the table was curated to flatter a position.

Lock before drafting

Once drafting starts, adding a late ticker forces rework of every factor row. Treat the peer-set lock as a real gate, not a courtesy email.