SAO PAULO (Reuters) -Brazilian asset manager Trigono Capital is not seeking to sell its stake in grains silo maker Kepler Weber, an executive said on Tuesday, rebuffing a report of talks with U.S. commodities trader Bunge about a potential deal.

Newspaper O Globo reported earlier in the day that Bunge was in negotiations to purchase Trigono's stake in Kepler Weber, saying that talks involved a 22% stake. It did not detail how it obtained the information.

Kepler Weber data, however, showed that Trigono's stake in the firm currently stands at 15.3%.

"It is not for sale and it never has been," Trigono Capital's Chief Investment Officer Werner Roger told Reuters, referring to the asset manager's stake in the silo maker.

Kepler Weber did not immediately respond to requests for comment. Bunge said it does not comment on what it described as "market rumors."

Shares in Kepler Weber extended losses after Reuters published Roger's remarks, trading down about 3.6% in the afternoon in Sao Paulo. Brazilian benchmark stock index Bovespa, of which the company is not part, was nearly stable.