Shares of Tower, which sold its life business to Fidelity Life Assurance for about $145 million in cash and liabilities in May, have fallen 6.4 per cent this year, while the NZX 50 Index climbed 18 per cent.
GPG plans to rebrand as Coats following the divestment process. The latest sale would lift its cash holdings to about 390 million pounds.
Shares of GPG last traded unchanged at 57 cents, valuing the company at $802 million. The stock is rated a 'hold' based on the consensus of seven analysts polled by Reuters.
GPG plans to return capital to shareholders once its asset sales are completed and the business transformed into Coats, though the total of the return depends on the UK's Pensions Regulator review of GPG's obligations under the Coats Pension Plan and Brunel Holdings Pension Scheme, which remain on its books.
-additional reporting Tamsyn Parker