MEXICO CITY, Oct 7 (Reuters) - Mexican mining and

transport conglomerate Grupo Mexico said in a

press release on Tuesday that its offer to buy 100% of Banamex

includes plans to retain 60% of the investment and sell the

remaining 40% to Mexican private investors and pension funds.

The company said it already has agreements for the 40%

portion it would sell off, and that it may later launch a public

offering to include smaller investors. The conglomerate also

said that it has no intentions of raising its bid, which it said

is 25% higher than Citigroup's ( C/PN ) previous valuation.