Russell 1000 concentration (2026)
The ten biggest companies in Russell 1000 hold 34.9% of it as of Jun 2026 — up from 20.6% in Sep 2019. The top five hold 25.5%, and NVIDIA CORPORATION alone holds 6.7%. Weights are the index's own, from the tracking fund's quarterly SEC filings, so they reconcile with the constituents list.
Share of the index held by its largest members#
Each band is a rank slot, not a fixed company — band 1 is whoever is biggest in that filing. Hover a band to see who holds that slot today; switch between the top 1, 3, 5 and 10.
Share of Russell 1000 by index weight, as filed by the tracking fund each quarter.
Who is in the top ten now, and who was then#
| # | Jun 2026 | Weight | Sep 2019 | Weight |
|---|---|---|---|---|
| 1 | NVIDIA CORPORATION | 6.72% | MICROSOFT CORPORATION | 3.82% |
| 2 | APPLE INC. | 6.03% | APPLE INC. | 3.68% |
| 3 | ALPHABET INC. | 5.42% | ALPHABET INC. | 2.67% |
| 4 | MICROSOFT CORPORATION | 3.99% | AMAZON.COM, INC. | 2.61% |
| 5 | AMAZON.COM, INC. | 3.33% | Facebook Inc | 1.55% |
| 6 | BROADCOM INC. | 2.53% | BERKSHIRE HATHAWAY INC. | 1.48% |
| 7 | MICRON TECHNOLOGY, INC. | 1.87% | JPMORGAN CHASE & CO. | 1.36% |
| 8 | META PLATFORMS, INC. | 1.78% | JOHNSON & JOHNSON | 1.25% |
| 9 | TESLA, INC. | 1.77% | THE PROCTER & GAMBLE COMPANY | 1.12% |
| 10 | ELI LILLY AND COMPANY | 1.38% | Visa Inc | 1.09% |
Into the top ten since Sep 2019: NVIDIA CORPORATION, BROADCOM INC., MICRON TECHNOLOGY, INC., META PLATFORMS, INC., TESLA, INC., ELI LILLY AND COMPANY. Out of it: Facebook Inc, BERKSHIRE HATHAWAY INC., JPMORGAN CHASE & CO., JOHNSON & JOHNSON, THE PROCTER & GAMBLE COMPANY, Visa Inc. The largest member has changed too — MICROSOFT CORPORATION then, NVIDIA CORPORATION now. Arrivals and departures are matched by ticker, so a company that renamed or re-listed in between (Facebook to Meta) can show up on both lists.
FAQ#
- How concentrated is Russell 1000?
- The ten largest companies hold 34.9% of the index as of Jun 2026, and the largest alone (NVIDIA CORPORATION) holds 6.7%. In Sep 2019 the top ten held 20.6%, so the index has become markedly more top-heavy over that span.
- When was Russell 1000 most concentrated?
- On the filings we hold, the top ten peaked at 37.6% in Dec 2025, against 34.9% now. Our weights run from Sep 2019 onward.
- Does concentration make the index riskier?
- It makes it less diversified than the member count suggests: when ten names are a third of the index, the index's return is largely their return, and a sector shock that hits them hits everything. It is not a market-timing signal — concentration has risen for long stretches while the index compounded — but it does mean a cap-weighted position is a much more concentrated bet than "500 companies" sounds.
Weights are as filed by the tracking fund on Form N-PORT each quarter — the index's own weights, not a market-cap approximation — and a company's share classes are combined into one row, so “top ten” means ten companies. Our filings begin Sep 2019. See also the sector mix — the other way an index can be less diversified than its member count suggests. Not investment advice.
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More on Russell 1000
- Companies & weights1011
- Stock performance1011
- Sector weights37.9%
- Return calculator$1,719
- Dividend yield1.01%
- Buyback yield1.48%
- Shareholder yield2.47%
- Earnings$2.67T