The financing for 343 Madison Ave. was led by Wells Fargo, alongside Bank of America, Bank of New York Mellon Corp. and JPMorgan Chase, the developer announced Tuesday. Photo credit: Courtesy of Volley Studio A rendering of 343 Madison Ave., on which BXP is immediately starting vertical construction. Investment and insurance company Starr is set to anchor 343 Madison, initially signing a 275K SF deal in January. Photo credit: Courtesy of Volley Studio A rendering of BXP's 343 Madison Ave. Of those underway, 343 Madison is the largest, scheduled for completion in late 2029.