Looking to push the company’s stock a little higher, Bruker Corp. chairman and CEO Frank Laukien upped his stake in the Billerica-based laboratory equipment maker between March 5 and March 10, according to a regulatory filing.

Laukien’s position in Bruker rose to roughly 23 percent — or about 38.2 million shares worth nearly $200 million.

The moves helped push Bruker’s stock higher. Shares opened March 10 at $4.26, peaked at $4.49 apiece and closed at $4.38, for a 2.8 percent increase on the day.