South West Water parent company Pennon Group is leaving the FTSE 100 in a rebalancing of the index, to be replaced by leisure travel company Tui Travel.
Pennon, whose shares have fallen 13 per cent this year, will now enter the FTSE 250 Index after a quarterly review approved by the independent FTSE Europe, Middle East and Africa Regional (EMEA) Committee. The change will come into force on 24 December.
The rules-driven reviews ensure the indices continue to portray an accurate reflection of the market they represent, and form an essential component to the management of the indices.
Pennon Group also owns waste management company Viridor, which has recently suffered profit losses. However, these have been offset by profit rises for South West Water.
Two publicly traded water utilities remain in the FTSE 100: Severn Trent and United Utilities.
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