The Williams team has confirmed it is looking for a new title sponsor after the end of its deal with telecommunications giant AT&T.
AT&T, the largest telecommunications company in the United States and one of the biggest worldwide, had been the team's title sponsor since the 2007 season.
Williams has removed all AT&T branding from its website.
"I can confirm that the team's contract with AT&T reached its conclusion on 31st December 2011 and will not be renewed for the 2012 season," a team spokesperson said.
The Grove-based squad endured its worst Formula 1 season in 2011, scoring just five points on its way to ninth place in the constructors' championship.
A team source told the Reuters news agency that Williams was in "advanced negotiations" with another telecommunications company.
Williams is yet to name its second driver for the 2012 season, with Bruno Senna, Adrian Sutil and Rubens Barrichello believed to be in the running.
Venezuelan Pastor Maldonado has already been confirmed for the upcoming season.