MEP & Building Systems
Publicly Traded

Delayed quotes, earnings dates, news, and long-term perspective on publicly traded companies in the mechanical, electrical, plumbing, and building systems sectors — written by someone who actually works in the trade.

Not investment advice  ·  Delayed quotes  ·  For informational purposes only

// watchlist

Symbol / Company Sector Price Chg Chg % Mkt Cap P/E TTM Div Yield Target 52W Range
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// earnings calendar

Next scheduled reports
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// latest news

Headlines — via Yahoo Finance
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// company links — IR · SEC · Yahoo

The angle

These aren't generic finance picks. They're companies whose earnings reports mean something to people who fabricate ductwork, install equipment, and source from distribution. WSO's volume numbers reflect what's actually moving on job sites. MLI's margins track copper. AAON's backlog tells you where commercial construction is headed. Long-term perspective, trade-informed context.

// field notes

April 2026
Circle of Competence — What a Sheet Metal Fabricator Can Actually Tell You
Warren Buffett talks about the circle of competence. Here's what's inside mine — and what isn't — and why that matters for how you read this site.
→ Read
Coming soon
WSO: Why Watsco is the backbone of HVAC distribution
Watsco distributes equipment from Carrier, Trane, Lennox, and others to roughly 68,000 contractors. If you've ever called your distributor for a stat, you may have been calling Watsco without knowing it.
→ HVAC
Coming soon
Mueller Industries: the copper hiding inside every HVAC install
MLI makes the refrigeration tube, fittings, and valves that go into nearly every residential and light commercial system. Copper pricing is essentially their earnings report before it's published.
→ Plumbing