At the company's annual shareholders meeting in May, an individual associated with the SEIU Master Trust submitted a proposal that called for the disclosure of additional information on political activity by the insurer.

Bertolini said that the company's disclosures are adequate.

"We agree that transparency and accountability are important," Bertolini said, adding that the company complies with all state and federal laws. "We don't believe that additional disclosures are warranted at this time."