2014 has seen a major overhaul in the health insurance landscape. The launch of the Affordable Care Act has fundamentally shifted the competitive environment of top health insurers, but perhaps no change has meant as much as the expansion of Medicaid. This shift has helped subscriber enrollment and premium revenue grow at savvy health insurers looking to capitalize on Obamacare's launch -- and three health insurers in particular have made the most for investors this year.

Molina Healthcare (NYSE:MOH) has certainly embraced Obamacare as a grand opportunity. The company operates heavily in the California market, and the rollout of the Golden State's Medicaid expansion has provided a huge boon to investors with Molina's big run-up year to date. Yet Molina -- and the other big gainers of the year in this industry -- may not be done yet.

Can Molina and the rest of this industry's best risers in 2014 continue delivering for investors in the future? Find out in the video below, as Motley Fool contributor Dan Carroll takes you through the stocks that have delivered a windfall to investors with Obamacare's passage -- and how investors can gain the most behind Obamacare's long-term outlook.