TAXI financier Winton Holdings (Bermuda) is to broaden its pool of financial resources by adding its major shareholder, Public Bank, to its team providing hire purchasing finance to taxi purchasers. Public Bank has a 34.42 per cent stake in Winton, which yesterday signed a co-financing agreement with the bank. Under the agreement, the entire amount of an approved hire purchase loan to a taxi purchaser is provided by Public Bank which assigns its entitlement to certain of the instalments, receivable under the loan to Winton in return for immediate payment by Winton of a portion for the hire purchase loan amount. The company said Public Bank's maximum commitment under the co-financing agreement for the year 1995 would be no more than $200 million and Winton's commitment no more than $85 million.