American insurance and risk management giant Aon has become the latest company to join Formula One's ever-growing list of sponsors having joined the McLaren team at Monaco. Based in Chicago, Aon employs 36,000 people at 500 offices spread through 120 countries and had a turnover in excess of $7.5bn in 2008.

British website Autosport.com spotted Aon logos on the sleeves of Lewis Hamilton and Jenson Button this morning, while Aon has also been added to McLaren's website as an corporate partner, although an official announcement has not been made. However, on Saturday an Aon spokesperson confirmed the tie-up with McLaren.

“Aon is excited to start working with McLaren,” said the spokesperson. “Vodafone McLaren Mercedes offers an ideal platform to drive sales and enhance our business-to-business marketing activity, especially in the global accounts segment and across important growth geographies.”

Formula One has seen a huge increase in new and rejoining sponsors in recent weeks and months as the global economy slowly lifts from recession. On Wednesday, Mercedes announced a deal with Deutsche Post, while Sauber reunited with Emily Frey AG, before Renault confirmed a sponsorship agreement with Trina Solar on Thursday, bringing the number of new partnership announcements within the past fortnight to 13.