Statistics · 2026 · Stocks
Stock Market Concentration Statistics (2026)
Just 56.0% of the combined market cap across WealthyBud’s 100-stock large-cap universe sits in its 10 biggest names — but that is WealthyBud’s own 100-stock basket, not the S&P 500. By comparison, SPY’s published holdings, a close proxy for actual S&P 500 index weights, show the real index’s top 10 stocks carry a combined weight of 37.25% as of July 9, 2026. WealthyBud’s smaller, mega-cap-heavy basket is mechanically more concentrated than the full 500-stock index.
Key takeaways
- The top 10 of WealthyBud’s 96 priced large-caps hold 56.0% of the group’s combined $39.45T market cap, as of 2026-07-10.
- NVIDIA CORP (NVDA) alone accounts for 12.9% of that total — 29.1 times the median covered company’s market cap of $175.5B.
- Just 8 of WealthyBud’s 100 covered stocks combine for half of the group’s total market cap.
- Four of the seven “Magnificent Seven” names have a priced market cap in WealthyBud’s data and hold 38.6% of the covered total; GOOGL, META lack a live price, and Tesla is not covered at all.
- In the real S&P 500, SPY’s holdings put the top 10 stocks’ combined weight at 37.25% as of July 9, 2026, per State Street’s SPDR fund page.
- Summed the same way, the full Magnificent Seven carry a combined 32.60% weight in SPY’s holdings — nearly a third of the index — as of July 9, 2026.
How concentrated is WealthyBud’s covered stock universe?
The 10 largest of WealthyBud’s 96 priced large-cap stocks hold 56.0% of the group’s combined $39.45T market cap, and the single largest, NVIDIA CORP, holds 12.9% on its own. This is WealthyBud’s own 100-stock large-cap basket, not the full stock market or the S&P 500.
1. Combined market cap of WealthyBud’s 100 covered large-caps: $39.45T
The 96 of WealthyBud’s 100 tracked large-cap stocks with a live share price carry a combined market capitalization of $39.45T as of 2026-07-10 (WealthyBud data · 100 large-caps · 2026-07-10).
2. NVIDIA CORP (NVDA) alone holds 12.9% of the total
NVIDIA CORP is the single largest covered company by market cap, $5.11T, representing 12.9% of the group’s combined market cap on its own (WealthyBud data · 100 large-caps · 2026-07-10).
3. Top 5 covered companies hold 43.4% of combined market cap
WealthyBud’s 5 largest covered companies by market cap together account for 43.4% of the full basket’s combined $39.45T (WealthyBud data · 100 large-caps · 2026-07-10).
4. Top 10 covered companies hold 56.0%
Widening to the 10 largest covered companies raises the share to 56.0% of combined market cap — a jump of 12.5 points from the top 5 alone (WealthyBud data · 100 large-caps · 2026-07-10).
5. Top 20 covered companies hold 67.8%
The 20 largest covered companies combine for 67.8% of total market cap, meaning the other 76 priced companies WealthyBud tracks share the remaining 32.2% (WealthyBud data · 100 large-caps · 2026-07-10).
Which stocks make up the top 10 by market cap?
Four sectors dominate WealthyBud’s top 10 by market cap: semiconductors and hardware (Nvidia, Broadcom, Micron, AMD), consumer tech and cloud (Apple, Microsoft, Amazon), retail (Walmart), banking (JPMorgan Chase) and pharma (Eli Lilly). The 10 combined hold 56.0% of the covered universe’s total market cap, as of 2026-07-10.
| Rank | Ticker | Company | Market cap | Share of covered total |
|---|---|---|---|---|
| 1 | NVDA | NVIDIA CORP | $5.11T | 12.94% |
| 2 | AAPL | Apple Inc. | $4.63T | 11.74% |
| 3 | MSFT | MICROSOFT CORPORATION | $2.86T | 7.25% |
| 4 | AMZN | AMAZON COM INC | $2.64T | 6.69% |
| 5 | AVGO | Broadcom Inc. | $1.90T | 4.82% |
| 6 | LLY | ELI LILLY & Co | $1.12T | 2.84% |
| 7 | MU | Micron Technology, Inc. | $1.11T | 2.80% |
| 8 | AMD | ADVANCED MICRO DEVICES INC | $909.7B | 2.31% |
| 9 | WMT | WALMART INC. | $906.4B | 2.30% |
| 10 | JPM | JPMORGAN CHASE & CO | $901.6B | 2.29% |
6. It takes only 8 of the 100 covered stocks to reach half the group’s market cap
Ranking WealthyBud’s covered stocks from largest to smallest, the 8 biggest combine for at least half of the $39.45T total — the remaining 88 priced stocks share the other half (WealthyBud data · 100 large-caps · 2026-07-10).
7. NVIDIA CORP is 29.1 times the median covered company’s market cap
The median market cap among WealthyBud’s 96 priced stocks is $175.5B, versus $5.11T for NVIDIA CORP alone — a 29.1x gap between the largest company and the typical one (WealthyBud data · 100 large-caps · 2026-07-10).
4 of the 100 tracked companies — including Alphabet and Meta, covered below — lack a live share price here and are excluded from the figures above (WealthyBud data · 2026-07-10).
How much of the real S&P 500 sits in its top 10 stocks?
SPY, the ETF that tracks the S&P 500, discloses its full holdings by weight, which mirror the underlying index closely. Summed directly from that published table, SPY’s 10 largest holdings carry a combined weight of 37.25% as of July 9, 2026, per State Street’s SPDR fund page — distinct from WealthyBud’s own 100-stock concentration figures above.
| Rank | Ticker | Company | Index weight |
|---|---|---|---|
| 1 | NVDA | NVIDIA Corp | 7.57% |
| 2 | AAPL | Apple Inc | 7.16% |
| 3 | MSFT | Microsoft Corp | 4.40% |
| 4 | AMZN | Amazon.com Inc | 3.73% |
| 5 | GOOGL | Alphabet Inc Cl A | 3.24% |
| 6 | AVGO | Broadcom Inc | 2.93% |
| 7 | GOOGL | Alphabet Inc Cl C | 2.60% |
| 8 | META | Meta Platforms Inc Cl A | 2.14% |
| 9 | TSLA | Tesla Inc | 1.76% |
| 10 | MU | Micron Technology Inc | 1.72% |
8. S&P 500 top-10 weight (via SPY holdings): 37.25%
The 10 largest weights in SPY’s published holdings sum to 37.25% as of July 9, 2026, per State Street’s SPDR S&P 500 ETF Trust holdings page. SPY is built to replicate the S&P 500, so its per-stock weights closely track the index’s own.
9. Nvidia and Apple alone are 14.73% of the S&P 500
Nvidia carries a 7.57% weight and Apple a 7.16% weight in SPY’s holdings as of July 9, 2026 — the two largest S&P 500 constituents combine for 14.73% of the index on their own, per State Street.
10. WealthyBud’s top-10 share (56.0%) runs well above the S&P 500’s (37.25%)
A smaller, mega-cap-heavy basket mechanically concentrates more — a 18.7-point gap between WealthyBud’s figure and SPY’s (WealthyBud data vs. SPY holdings, 2026-07-10 / July 9, 2026).
Screen all 100 covered stocks by market cap, valuation and Investor Score
How big is the “Magnificent Seven” in each dataset?
The “Magnificent Seven” — Nvidia, Apple, Microsoft, Amazon, Alphabet, Meta and Tesla — are the mega-cap tech stocks most credited with driving recent market gains. 4 have a priced market cap in WealthyBud’s dataset and hold 38.6% of its covered total. In the real S&P 500, SPY’s holdings put the full seven at 32.60% of the index.
11. 4 of the Magnificent Seven hold 38.6% of WealthyBud’s covered total
NVDA, AAPL, MSFT, AMZN are the Magnificent Seven names with a priced market cap in WealthyBud’s dataset; together they carry $15.24T, or 38.6% of the $39.45T covered total (WealthyBud data · 2026-07-10).
12. GOOGL, META are tracked but currently unpriced
WealthyBud tracks GOOGL, META, but neither currently has a live share price, so they carry no market cap here and are excluded from every figure above (WealthyBud data · 2026-07-10).
13. Tesla is not among WealthyBud’s 100 covered large-caps
Tesla (TSLA) is part of the commonly cited Magnificent Seven but is not one of the 100 companies WealthyBud tracks, so it contributes nothing to the figures on this page.
14. Magnificent Seven share of the real S&P 500: 32.60%
Summed from SPY’s published holdings, the full Magnificent Seven — including both Alphabet share classes — carry a combined 32.60% weight in the S&P 500 as of July 9, 2026, per State Street’s SPDR fund page.
15. WealthyBud’s 4 priced Magnificent Seven names (38.6%) outweigh the full seven’s S&P 500 share (32.60%)
Just 4 of the 7 Magnificent Seven names hold a bigger share of WealthyBud’s basket (38.6%) than all 7 hold of the S&P 500 (32.60%) — basket size alone changes the concentration figure.
- NVIDIA CORP (NVDA) carries a market cap of $5.11T, 12.9% of the covered total.
- Apple Inc. (AAPL) carries a market cap of $4.63T, 11.7% of the covered total.
- MICROSOFT CORPORATION (MSFT) carries a market cap of $2.86T, 7.3% of the covered total.
- AMAZON COM INC (AMZN) carries a market cap of $2.64T, 6.7% of the covered total.
What this means for investors
WealthyBud’s concentration numbers are not S&P 500 numbers. WealthyBud tracks 100 large-caps, not the 500 in the S&P 500, so any top-N share computed from its data runs higher than the equivalent index-weight figure — 56.0% versus 37.25% for the top 10.
Real index concentration is already historically high. SPY’s holdings show the Magnificent Seven alone carry a 32.60% weight in the S&P 500 as of July 9, 2026 — heavy dependence on a handful of mega-cap tech stocks for a broad-market index.
Missing prices distort any concentration count. Alphabet and Meta sit inside WealthyBud’s universe but lack a priced market cap here, so its figures understate their true weight; always check whether a top-N share is built on a full or partial basket before comparing sources.
For diversification-minded investors, a market-cap-weighted basket — WealthyBud’s 100 stocks or the S&P 500 itself — concentrates risk in whichever handful of companies investors have bid up the most.