The table below lists the GICS sector weightings of the FTSE 100 index. Currently (12/31/2019), the largest sector is the Financials sector that makes up 20.25% of the index. Consumer Staples companies come second with a weighting of 15.77%. The largest individual index constituent is HSBC Holdings whose weight is 6.3%, followed by AstraZeneca plc (5.3%). Five of the largest consituents comprise more than 25% of the index.
[FTSE 100 Index] – GICS Sector Weightings
| Sector | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 | 12/31/2014 |
| Communications | 5.37% | 5.82% | - | - | - | - |
| Consumer Discretionary | 6.72% | 6.26% | 8.47% | 9.29% | 11.04% | 9.54% |
| Consumer Staples | 15.77% | 15.84% | 17.29% | 16.36% | 18.35% | 16.33% |
| Energy | 14.39% | 17.23% | 15.48% | 15.62% | 12.15% | 14.84% |
| Financials | 20.25% | 20.46% | 21.82% | 20.77% | 23.36% | 22.51% |
| Health Care | 10.98% | 9.69% | 9.05% | 10.64% | 10.34% | 9.69% |
| Industrials | 10.05% | 9.10% | 7.12% | 7.05% | 6.84% | 7.27% |
| Information Techn. | 1.01% | 1.03% | 1.85% | 0.91% | 1.51% | 1.12% |
| Materials | 10.83% | 10.40% | 10.28% | 9.31% | 5.46% | 8.66% |
| Real Estate | 1.20% | 0.99% | 1.23% | 1.22% | - | - |
| Utilities | 3.45% | 3.18% | 3.10% | 4.19% | 4.53% | 4.53% |
| Telecoms (discont.) | - | - | 4.30% | 4.64% | 6.41% | 5.50% |
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