For investors who may want to emulate professional investors, a new report takes a close look at which companies the nation's largest hedge funds are putting in their portfolios.

WalletHub looked at the largest 50 hedge funds in Barron's Penta Top 100 Hedge Funds list, a subgroup that controls more than $6 trillion in assets, and compiled a list of the companies most prevalent among their holdings.

The top of the list was rife with technology stocks, although it was notable that International Business Machines (IBM) was the company stock that the top 50 funds were selling the most.

The following 10 U.S. companies, in ascending order, represent the biggest holdings among the 50 studied hedge funds:

10. UnitedHealth Group

Based in Minnetonka, Minn., the for-profit health-care company offers health care products and insurance services.