Formula One racing team BMW Sauber have one of their main backers ahead of the new season after banking group Credit Suisse opted not to renew their deal.
That contract ended in 2008 and Credit Suisse will now "focus on regional sporting and cultural activities".
"We think that the team is on a good path and so now is the right time to say goodbye," continued the statement.
A BMW Sauber spokesman told BBC Sport that it would have "no impact" on the team's budget for 2009.
"It will have absolutely no influence on that," he said.
"The budget for 2009 is fixed, we are happy with it, and we move on as always.
"The search for new sponsors is ongoing, as it always is, but it is not something we can set a deadline on.
"We are having some interesting discussions with various parties and we will see how they develop."
Credit Suisse was the main sponsor of Switzerland's privately owned Sauber race team from 2001 to 2005 and stayed on when the outfit was taken over by BMW at the start of 2005.
BBC SPORT
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