Who would have thought requiring everyone in the nation to get health insurance would cause the biggest health insurance companies’ stocks to rise?

Turns out if you’d have invested in health insurance stocks at the start of the whole Obamacare fiasco, you’d have be sitting pretty right now.

Here’s a list of some of the top health insurance providers in the U.S., and a look at how their stocks have produced decent returns since Obama signed the Affordable Care Act into law in 2010.

1. Blue Cross Blue Shield (owned by WellPoint Inc. [WLPO])

2. United Healthcare (UNH)

3. Aetna Group Inc. (AET)

4. Molina Healthcare, Inc. (MOH)

5. Humana Group Inc. (NYSE: HUM)

6. Cigna Corp. (NYSE: CI)

7. Coventry Health Care Inc. (CVH)

8. Superior Health Plan – Owned by Centene Corp. (CNC)

Does anyone else notice a trend here?

Actually, this shouldn’t come as a shock. After all, the health care industry spent nearly $500 million lobbying for health care issues in 2012, and $243 million so far in 2013. “No other industry sector spent more lobbying Congress and the federal government,” according to Breitbart.

One popular healthcare company that is noticeably absent from this list is Amerigroup, which was purchased by WellPoint Inc. in July 2012 for $4.9 billion in cash.

Also absent is the Kaiser Foundation Health Plan as it is part of a privately held network, and Celtic Healthcare, which the Washington Post Co. (yes, the newspaper Amazon founder Jeff Bezos recently purchased) acquired a majority stake in in October 2012.

According to an Organization for Economic Cooperation and Development report from 2008, the United States spends more on healthcare than any other country in the world.