The Universe at a Glance
As of June 23, 2026, the Headmars tracked universe spans eight sectors and 1,272 companies, with a combined market capitalisation north of $49 trillion. That breadth is deceptive: concentration is extreme at the top, and the tail sectors tell a very different story.
Technology: The Undisputed Heavyweight
With 369 companies and ~$18.9 trillion in aggregate market cap, Technology is not just the largest sector — it is in a category of its own. Names like Apple, Microsoft, NVIDIA, and AMD are household anchors, but the sector's sheer company count (nearly 30% of the entire tracked universe) suggests meaningful exposure to mid- and small-cap names well beyond the mega-caps.
For investors, this concentration is a double-edged sword. The upside — liquidity, analyst coverage, and momentum — is well understood. The risk is correlation: when sentiment shifts on AI infrastructure spending or rate expectations, the whole sector can reprice together.
Financials: Few Companies, Enormous Weight
The most striking asymmetry in the universe is Financials. At just 67 companies, it is the sixth-smallest sector by count — yet it carries ~$16.1 trillion in market cap, second only to Technology. That math points squarely at the mega-caps: Berkshire Hathaway, JPMorgan, Visa, Mastercard, and Bank of America collectively distort the sector average dramatically.
This is worth watching closely. Financials' outsized cap weight means that any macro shock affecting credit, interest rates, or payment networks will register loudly in portfolio-level metrics, even for users who think they have minimal financial exposure.
Communication Services: Quality Over Quantity
46 companies, ~$5.2 trillion in cap. Communication Services is the clearest example of a high-conviction sector — a small roster dominated by Alphabet (both share classes), Meta, Netflix, Disney, and Tencent. The sector's per-company average cap is the highest in the universe, reflecting how a handful of platform businesses have consolidated global advertising, streaming, and social media.
Investors tracking this sector should watch regulatory developments across the US, EU, and China simultaneously, given how geographically distributed the top names are.
The Mid-Tier Three: Industrials, Healthcare, Consumer Cyclical
Industrials (241 companies, ~$3.3T) is the most geographically diverse sector in the dataset, mixing Taiwanese hardware, Chinese industrial names, US conglomerates like Honeywell, and emerging-tech plays like Archer Aviation. This heterogeneity makes sector-level generalizations tricky — performance will diverge sharply between sub-industries.
Healthcare (210 companies, ~$3.3T) mirrors Industrials in cap but carries a different character: anchor names like Johnson & Johnson, UnitedHealth, and AbbVie alongside speculative biotech and pharma names from Korean and Chinese exchanges. A two-speed sector where the mega-caps provide stability and the long tail provides volatility.
Consumer Cyclical (97 companies, ~$521B) looks comparatively small in cap despite including Amazon and Tesla — a sign that the remaining 95 companies are largely sub-scale. Watch this sector for divergence between the US names and the Alibaba/HK-listed constituents, which respond to separate macro cycles.
Smaller Sectors Worth Noting
Energy (64 companies, ~$1.8T) spans US majors, UK-listed Shell, Indian Reliance, and Canadian small-caps — a global mix that won't move in lockstep. Basic Materials (78 companies, ~$158B) is the smallest by market cap and skews heavily toward junior miners and resource explorers, many listed on Canadian exchanges. High risk, high variance.
What to Watch
Three themes stand out from this composition:
- Tech + Financials = ~71% of total cap. Portfolio-level risk metrics will be dominated by these two sectors regardless of individual position sizes elsewhere.
- Geographic dispersion is real but uneven. Industrials, Healthcare, and Energy carry meaningful non-US exposure; Technology and Financials remain US-centric at the cap-weighted level.
- The long tail is large. Nearly 500 of the 1,272 tracked names are in sectors with sub-$500B aggregate cap. These are where alpha — and blow-ups — live.