A Baltimore Sun article (http://articles.baltimoresun.com/2014-01-10/entertainment/bs-ae-renoir-summary-judgment-granted-20140110_1_renoir-girl-museum-director-doreen-bolger-bords) had this to say about the insurance:
“Museum director Doreen Bolger, who celebrated her 65th birthday Friday, said she was thrilled by the outcome. She said she was ‘incredibly grateful’ to the museum’s former insurer, Fireman’s Fund, which at one point appeared to have the strongest legal claim to the little oil painting with its swirls of pink, green and blue. Though the company had paid a $2,500 insurance settlement for the theft in 1951, Fireman’s Fund recently assigned its rights in the artwork to the BMA [Baltimore Museum of Art].”
after all these years the insurer basically gave them the ownership back, I got it