What is the biggest sector in the S&P 500?

Technology, at about 36.7% of the index.

How many sectors does the S&P 500 have?

Eleven GICS sectors; every member belongs to exactly one.

Which sector is performing best in 2026?

Technology leads YTD at +45.2%; Consumer Discretionary trails at +0.4%.

S&P 500 sector weights: Technology 36.7% leads the index

Technology is the S&P 500's largest sector at 36.7% of the index; the top three sectors hold 60% 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

TechnologyFinancialsCons DiscComm SvcsIndustrialsHealthcareStaplesUtilitiesEnergyReal EstateMaterialsUntracked

Breakdown by sector

SectorShare of indexWeightMembersYTDExample stocks

Technology

36.7%64+45.2%NVDA AAPL MSFT AVGO

Financials

12.1%72+4.9%BRK-B JPM V MA

Consumer Discretionary

11.1%88+0.4%AMZN TSLA HD MCD

Communication Services

9.3%11+2.8%GOOGL META NFLX TMUS

Industrials

8.8%84+22.7%CAT GE GEV RTX

Healthcare

8.7%54+8.6%LLY JNJ ABBV UNH

Consumer Staples

4.3%27+11.6%WMT COST KO PG

Utilities

2.8%37+13.1%NEE SO DUK WM

Energy

2.8%16+37.8%XOM CVX COP VLO

Real Estate

1.8%28+19.2%WELL PLD EQIX SPG

Materials

0.8%6+16.0%LIN NEM FCX APD

0.8% 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% — the index's drift toward Technology is the story of this chart.

TechnologyCons DiscFinancialsHealthcareIndustrialsComm SvcsStaplesUtilitiesEnergyReal EstateMaterialsUntracked

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 (~10% in 2019) by construction.

FAQ

What is the biggest sector in the S&P 500?: Technology, at about 36.7% of the index (64 companies). The top three sectors — Technology, Financials, Consumer Discretionary — together make up 60% of the index.
How many sectors does the S&P 500 have?: Eleven, under the GICS classification: Information Technology, Financials, Health Care, Consumer Discretionary, Communication Services, Industrials, Consumer Staples, Energy, Utilities, Real Estate, and Materials. Every member belongs to exactly one.
Which sector is performing best in 2026?: Technology leads year to date at +45.2% (weighted by index weight within the sector); Consumer Discretionary trails at +0.4%.

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 float-adjusted market-cap weighted, a sector's share reflects investable size, not company count — Technology has 64 members but 36.7% of the weight. Sector pages: tech stocks, energy stocks; the full member list with weights is on the constituents page. Not investment advice.

ChartRow is not affiliated with, sponsored by, or endorsed by S&P Dow Jones Indices LLC, S&P Global, or Nasdaq, Inc. "S&P 500®" and "Dow Jones®" are registered trademarks of S&P Dow Jones Indices LLC; "Nasdaq-100®" is a registered trademark of Nasdaq, Inc. They are used here only to identify the indexes discussed. All index-related figures on this page are independently derived from public sources — SEC filings, Robert Shiller's public dataset, and our own computations — not from any index provider's data feed.