Patheon N.V., the Durham, North Carolina, company that bought Agere Pharmaceuticals in Bend, ended its first day of trading Thursday on the New York Stock Exchange at $24.99 per share, 19 percent over its initial-public-offering price of $21 per share.

Patheon, traded under the symbol PTHN, announced the share price on Wednesday night, and it was near the top of the company’s expected range of $19 to $22 per share.

The company and its majority shareholder, Royal DSM N.V., offered 30.5 million shares, raising $640 million. The proceeds will go toward paying down debt, according to company filings with the U.S. Securities and Exchange Commission.

Patheon is a contract drug manufacturer with more than 8,000 employees. It acquired Agere, which specializes in drug absorption technology, in March of 2015 for $27.1 million.