FTSE 350 Index

The Financial Times Stock Exchange 350 Index, also called the FTSE 350 Index, FTSE 350, is a market capitalization weighted stock market index made up of the constituents of the FTSE 100 and FTSE 250 indices.^[1] The FTSE 100 Index comprises the largest 100 companies by capitalization which have their primary listing on the London Stock Exchange, while the FTSE 250 Index comprises mid-capitalized companies not covered by the FTSE 100, i.e. the 101st to 350th largest. See the articles about those indices for lists of the constituents of the FTSE 350.

Foundation30 December 1983

OperatorFTSE Russell

ExchangesLondon Stock Exchange

Trading symbol

• NMX

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FTSE 350

Performance of the FTSE 350 index between December 1983 and March 2026
Foundation	30 December 1983
Operator	FTSE Russell
Exchanges	London Stock Exchange
Trading symbol	NMX
Constituents	350 (March 2026)
Type	Large and Mid-cap
Market cap	£2.710 trillion (March 2026)
Weighting method	Capitalisation-weighted
Related indices	FTSE 100 Index FTSE 250 Index FTSE SmallCap Index FTSE All-Share Index FTSE Fledgling Index FTSE AIM UK 50 Index
Website	official website
Reuters	.FTLC
Bloomberg	NMX:IND

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The index is maintained by FTSE Russell, a subsidiary of the London Stock Exchange Group.^[1]