Nasdaq-100 sector weights: Technology 57.9% leads the index
Technology is the Nasdaq-100's largest sector at 57.9% of the index; the top three sectors hold 82% between them (as of market close, Jul 22, 2026). Weights are each member's actual index weight (from the tracking fund's SEC filing, price-updated daily — see the full constituents list company by company) summed by GICS sector — so this is the real mix you own in an index fund, not an equal-count tally.
The mix at a glance
Breakdown by sector
2.7% of index weight sits in members outside our price universe (listed on the constituents page) and isn't sectored here. YTD is the weight-weighted total return of the sector's members; example stocks are each sector's largest members (hover for their index weight). Explore the members of each sector in the market heatmap (grouped by sector) or the screener.
Sector weights over time (2019–2026)
Every quarterly SEC portfolio filing since 2019, stacked to 100%.
Quarterly N-PORT snapshots; sector attribution uses today's classifications, so members that have since left the index (or our universe) appear as the gray "untracked" band — larger in older quarters (~12% in 2019) by construction.
FAQ
- What is the biggest sector in the Nasdaq-100?
- Technology, at about 57.9% of the index (37 companies). The top three sectors — Technology, Communication Services, Consumer Discretionary — together make up 82% of the index.
- How many sectors does the Nasdaq-100 span?
- 10 of the 11 GICS sectors are currently represented among the members we track — the Nasdaq-100 excludes financial companies by its methodology, and its market-cap weighting concentrates most of the weight in Technology. Every member belongs to exactly one GICS sector.
- Which sector is performing best in 2026?
- Technology leads year to date at +68.3% (weighted by index weight within the sector); Financials trails at -14.4%.
Notes & related
Sector classifications are GICS (each company in exactly one sector); weights are from the tracking fund's N-PORT holdings rolled forward daily by price, summed per sector. Because weights are modified float-adjusted market-cap weighted (capped), a sector's share reflects investable size, not company count — Technology has 37 members but 57.9% of the weight. Sector pages: tech stocks, energy stocks; the full member list with weights is on the constituents page. Not investment advice.
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