How often is FTSE 100 rebalanced?

Quarterly, on the Wednesday after the first Friday of March, June, September, and December.

FTSE Russell, a subsidiary of the London Stock Exchange Group.

FTSE 100 API — Financial Times Stock Exchange 100 Data for AI Agents

About the FTSE 100

The FTSE 100 is the flagship index of the London Stock Exchange, comprising the 100 largest companies by market capitalisation. Its constituents are heavily internationalised — a majority of FTSE 100 revenue is generated outside the UK.

Notable Constituents

A sample of the largest companies in the FTSE 100 — all available via the Stock Market API.

SHEL

Shell

AZN

AstraZeneca

HSBA

HSBC

ULVR

Unilever

BP

GSK

API coverage for the FTSE 100

Fetch the index membership list or query any constituent's data directly.

Index Members

List every constituent currently in the index.

GET /api/v1/indices/FTSE100

Constituent Financials

Full income statement, balance sheet, and cash flow per company.

GET /api/v1/companies/{ticker}/financials

Start querying FTSE 100 data

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Frequently Asked Questions

How often is FTSE 100 rebalanced?: Quarterly, on the Wednesday after the first Friday of March, June, September, and December.
Who administers it?: FTSE Russell, a subsidiary of the London Stock Exchange Group.
What currency is it quoted in?: British pence (GBX).

FTSE 100 — Financial Times Stock Exchange 100