U.S.-based investment advisory firm Smith Asset Management Group LP acquired a stake in Irish pharmaceutical company Allergan plc.

Smith Asset acquired 176,773 shares of Allergan’s stock, valued at approximately $33.7 million. Shares of Allergan opened at $164.85.

Several other hedge funds have also bought and sold shares of the company. U.S.-based investment firm Edgewood Management LLC now owns 5.7 million shares of Allergan’s stock valued at $955 million after acquiring an additional 144,282 shares during the last quarter.

Allergan had revenue of $3.91 billion for the last quarter. The stock has a market capitalization of $54.99 billion.