Before Monday’s opening bell, UnitedHealth (UNH) reported that it will acquire Catamaran (CTRX). Here’s what the news means for mutual fund investors.

UnitedHealth reported its pharmacy business OptumRx has agreed to acquire Catamaran in a $12.8 billion deal, or $61.50 per share. The companies noted that this deal is expected to close in the fourth quarter.

UNH reported that the deal is expected to add 30 cents per share to earnings in 2016.

In the merger deal, the two companies are aiming to obtain more favorable prices with pharmaceutical companies, as they face companies like Express Scripts and CVS. The deal will combine the fourth and third largest pharmacy-benefit companies in the U.S.

Investors interested in the two companies may be interested in the funds listed below. These funds currently have the largest stakes in the companies.

Funds Holding UnitedHealth

Funds Holding Catamaran

The funds listed above allow investors to gain exposure to UNH and CTRX while remaining diversified. Investors interested in these companies may also be interested in CVS Health (CVS) or Express Scripts (ESRX).

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