The tracked universe now spans 2,299 companies across eight sectors. Rank them by company count and you get one story; rank them by aggregate market capitalisation and you get another. Reading both maps together is where the useful signal lives.
Breadth: Technology owns the count
By sheer number of names, Technology dominates with 620 companies, followed by Industrials (441), Healthcare (380) and Basic Materials (325). Together those four sectors account for roughly three-quarters of everything tracked. The long tail thins out fast: Consumer Cyclical (166), Financials (139), Energy (139) and Communication Services (89) round out the list.
Technology's breadth is unsurprising given its marquee constituents — Apple, Microsoft and NVIDIA — but the count also reaches deep into semiconductors (AMD, Intel) and software (Salesforce). Industrials, second by count, is the most globally scattered: Honeywell and Archer Aviation sit alongside Chinese and Taiwanese listings like Xiamen Solex and Arch Meter.
Weight: Financials and Energy tower over the rest
Flip to aggregate market cap and the ranking inverts. Financials leads at roughly $159.5T, with Energy at ~$106.5T and Basic Materials at ~$47.2T. Technology — first by count — comes fourth by weight at ~$22.7T. Consumer Cyclical is the outlier: it holds Amazon and Tesla, arguably two of the most valuable franchises anywhere, yet posts the smallest aggregate at ~$0.58T.
That mismatch is the headline. A sector can be crowded with tickers yet light in capital (Healthcare: 380 names, ~$3.7T), or sparse yet enormous (Communication Services: 89 names anchored by Alphabet, Meta, Netflix and Tencent).
What an investor should actually watch
Before reading these totals as market truth, treat them with suspicion — the sample names betray heavy cross-listing and duplication. Tesla appears as TL0.F and TL0.DE, Alphabet as GOOGL and GOOG, Novo Resources as NVO.TO and NVO.AX, Galantas Gold as GAL.V and GAL.L, Obsidian Energy as OBE and OBE.TO. Every duplicate inflates both the company count and the summed capitalisation. The eye-watering Financials and Energy totals almost certainly reflect double-counted listings rather than genuine sector supremacy, so the count-vs-cap divergence is partly a data-quality artefact, not just a market structure fact.
Three things are worth monitoring:
- Concentration risk. Where a sector's weight rests on a handful of megacaps (Communication Services, Consumer Cyclical), the aggregate figure is fragile to a single name moving.
- Breadth without depth. Healthcare and Industrials offer many names but modest combined weight — fertile ground for stock-picking, thin ground for index-style exposure.
- Deduplication discipline. Until cross-listings are collapsed to a single economic entity, sector-cap comparisons overstate the largest sectors most.
The practical takeaway: use the count map to gauge where opportunity is broad, and the weight map to gauge where the capital — and the risk — is concentrated. Just don't trust either one until the duplicate tickers are reconciled.