The shape of the universe
Headmars now tracks 2,297 companies across eight sectors, and the distribution is unmistakably technology-forward. Technology alone accounts for 620 names — more than a quarter of the universe — anchored by the usual megacaps (AAPL, MSFT, NVDA) alongside the semiconductor supporting cast of AMD and INTC. Industrials follows at 440 and Healthcare at 380, giving the top three sectors 1,440 constituents, or roughly 63% of everything tracked.
What stands out is how global and long-tailed the roster is. The Industrials sample runs from Honeywell straight to Xiamen Solex and Taiwan's ARCH METER; Basic Materials (324 names) is dominated by Hong Kong fertiliser, Argentine lithium, and micro-cap gold miners like Galantas. This is not an S&P 500 mirror — it is a wide, worldwide net that reaches deep into small and speculative names.
The count vs. cap divergence
Here the data tells two contradictory stories, and honesty demands flagging it. Ranked by number of companies, the order is Technology → Industrials → Healthcare → Basic Materials. Ranked by the recorded aggregate market cap, the order inverts almost completely: Financials tops the list at ~$159T, Energy at ~$107T, and Basic Materials at ~$47T, while Technology sits fourth at ~$23T.
That ordering does not survive a sanity check. Consumer Cyclical — which contains Amazon and Tesla — reports the smallest aggregate cap in the universe (~$0.58T), which is implausible for a bucket holding two of the largest companies on earth. Meanwhile Financials, with just 139 names, carries a total larger than global GDP. The likeliest explanation is a data-quality problem: currency mismatches, duplicate cross-listings (note NVO.TO / NVO.AX, GAL.V / GAL.L, TL0.F / TL0.DE all appearing separately), or unit errors inflating a handful of rows.
What an investor should watch
First, treat the cap column as unverified. Until the Financials and Energy totals reconcile against their constituents, position sizing or sector weighting off these figures would be building on sand. Company count is the more trustworthy signal today.
Second, mind the cross-listings. Tesla, Alphabet (GOOGL/GOOG), and several miners appear under multiple tickers. Any breadth or concentration metric needs deduplication first, or it will overstate sector diversity.
Third, watch the small-cap tail. The universe's character comes from names like Archer Aviation, Obsidian Energy, and a raft of Chinese and Taiwanese listings — higher volatility, thinner liquidity, and more headline sensitivity than the megacap headline suggests.
The headline is simple: this is a Technology-weighted, globally sprawling universe. The footnote is more important — the aggregate cap figures need auditing before they earn any weight in a decision.