Gene Haas has insisted that he is "not desperate" to fill up the new American team's 2016 livery.
Despite the huge interest in Formula 1's newest team, only the personal sponsors of drivers Romain Grosjean and Esteban Gutierrez are easily visible on the grey, black and red car and their race overalls.
"We received many requests," Haas said the Barcelona test on Tuesday, "but we did not hear the numbers that we wanted to hear."
He told Speed Week that a lack of sponsorship is not a big deal.
"Good point," he answered when told that he probably wants to focus more on promoting his own company, Haas Automation, the world's biggest machine tool builder.
"We are certainly not a mass product like a car or an energy drink. If the right sponsor comes along, we will listen. But we are not desperate.
"We are prepared to be financially efficient: the budget is appropriate for what we want to achieve."
However, Haas got off to a shaky start at its first official test when the front wing on Grosjean's car spectacularly failed at high speed, prompting a rapid re-design.