History of Market · The Chronicle of the U.S. Stock Market S&P 500
Gathering I · leaf 25 of 27
S&P 500 · Sector Weights

S&P 500 · Sector Weights — GICS Eleven-Sector Weight Distribution

GICS Sector Weights — Live market cap weighting and historical compositional shift across the eleven GICS sectors.

Information technology leads by a wide margin; financials, healthcare, and consumer discretionary follow. The sector pie itself reads as a short history of American industry.

View the interactive chart Download raw JSON

What this page answers

Information Technology commands the heaviest weighting in the S&P 500 at 33.3%; the top three sectors collectively account for 56.2%. Sector allocations drift continuously with equity market capitalizations and are updated each trading day.

Information technology leads by a wide margin; financials, healthcare, and consumer discretionary follow. The sector pie itself reads as a short history of American industry. The data is refreshed by the History of Market pipeline and published as a stable JSON endpoint for research, citation, and AI-agent use.

The plate

S&P 500 · Sector Weights — GICS Eleven-Sector Weight DistributionInformation Technology33.3%Financials12.6%Communication Services10.4%Consumer Discretionary9.8%Health Care9.3%Industrials9.1%Consumer Staples5.2%Energy3.9%Utilities2.5%Materials2.1%Real Estate2.0%
Plate I.25 Information technology leads by a wide margin; financials, healthcare, and consumer discretionary follow. The sector pie itself reads as a short history of American industry. 2026-09-05

Latest Snapshot

Updated
2026-09-05
Top weight
Information Technology +33.3%

S&P 500 — GICS sector weighting distribution

S&P 500 — GICS sector weighting distribution
SectorWeightProminent Constituents
Information Technology33.3%NVIDIA, Apple, Microsoft
Financials12.6%Berkshire Hathaway, JPMorgan, Visa
Communication Services10.4%Alphabet, Meta, Netflix
Consumer Discretionary9.8%Amazon, Tesla, Home Depot
Health Care9.3%Eli Lilly, UnitedHealth, Johnson & Johnson
Industrials9.1%GE Aerospace, Caterpillar, RTX
Consumer Staples5.2%Walmart, Costco, Procter & Gamble
Energy3.9%Exxon Mobil, Chevron, ConocoPhillips
Utilities2.5%NextEra Energy, Southern, Duke Energy
Materials2.1%Linde, Sherwin-Williams, Ecolab
Real Estate2.0%Prologis, American Tower, Equinix

Complete record (11 rows). Raw dataset: https://historyofmarket.com/api/sp500/sectors.json

Data & Source

GET /api/sp500/sectors.json — Canonical dataset endpoint.

Exchange closing prices · Company filings · Robert Shiller · FRED · NBER.

FAQ

Where does this data come from?

History of Market combines public market and macro datasets — exchange closing prices, company filings, Robert Shiller, FRED, NBER, and the UBS Global Investment Returns Yearbook (Dimson–Marsh–Staunton). The exact endpoint for this panel is linked below.

How often is it updated?

Daily-tier datasets refresh after the U.S. market close, with a broader weekly refresh on Sunday. The timestamp shown on this page comes from the JSON payload.

Can I use the data?

Yes, for research and education with attribution to History of Market. Upstream data sources retain their own terms.