CMC Magnetics (TPE:2323) acquired about 2.2 million shares of Dynapack International Technology for NT$402.3 million.
The shares were purchased between April 22 and May 21, at an average price of NT$184.61 apiece, according to a Wednesday filing with the Taiwan Exchange.
Following the acquisition, CMC now holds a total of 379,000 shares, representing 0.25% of Dynapack's total shares.
The optical storage products manufacturer said the purchase was part of its portfolio management strategy.