A total of 14 major health insurance companies and their industry association spent 25% more this year to lobby on health care measures before Congress than they did last year, according to a Public Campaign Action Fund analysis.

The insurers and their association, the American Health Insurance Plans, threw $2.5 million a month at lobbying in Washington, D.C., during the first six months of the year, according to the fund, which bills itself as a nonpartisan group advocating for election reform to halt special interest spending.

The fund found that collectively the 14 insurers, each part of the Fortune 500 top 100 firms, and AHIP put forth $762,282 in campaign contributions and $14,781,639 in lobbying expenses during the first half of this year.

With reform proposals calling for a public option or health exchanges, many health insurance companies worry what their role may be after reform is completed.

“These highly profitable corporations are spending millions every month to protect their bottom line by fighting health care reform in Washington, D.C.,” said David Donnelly, national campaigns director of Public Campaign Action Fund, in a statement. “To put it starkly, they have invested heavily in insider lobbyists and politicians to maintain their bottom line leaving Americans out in the cold and stuck with our broken health care system.”

He added that the “money chase” should end so legislators can “pass sound public policy that benefits all of us and not just those who can make big campaign contributions.”

All of the data was compiled by reviewing records found at the nonpartisan Center for Responsive Politics website and the Senate lobbying disclosure website.

The analysis reported the following contributions:

• Aetna Inc.: $11,200 contributions, $1,441,639 in lobbying expenses
• America’s Health Insurance Plans, $3,514 in contributions, $3.9 million in lobbying expenses
• Amerigroup Corp, $53,140 in contributions, $215,000 in lobbying expenses
• Centene Corp, $19,300 in contributions, $230,000 in lobbying expenses
• Cigna Corp, $57,365 in contributions, $720,000 in lobbying expenses
• Coventry Health Care, $19,100 in contributions, $300,000 in lobbying expenses
• Health Net Inc., $11,300 in contributions, $680,000 in lobbying expenses
• Healthspring, $2,400 in contributions, $90,000 in lobbying expenses
• Humana Inc., $170,556 in contributions, $950,000 in lobbying expenses
• Medical Mutual of Ohio, $3,000 in contributions, no lobbying expenses
• Molina Healthcare, $72,507 in contributions, $270,000 in lobbying expenses
• UnitedHealth Group, $130,200 in contributions, $2.5 million in lobbying expenses
• Universal American Financial Corp, $3,800 in contributions, $865,000 in lobbying expenses
• WellCare Group, $2,500 in contributions, $200,000 in lobbying expenses
• Wellpoint (Anthem), $202,400 in contributions, $2.42 million in lobbying expenses