Waltham, Mass.-based ImmunoGen (NASDAQ:IMGN) will lose its CFO in two weeks.

On Tuesday, ImmunoGen announced that Chief Financial Officer Gregory D. Perry intends to resign from the company "to pursue other interests," effective Sept. 13. At that time, Perry will be paid a "salary continuation benefit" equal to 12 months' salary. His salary is currently listed at $477,958, according to S&P Capital IQ.

Once Perry is gone, company Chief Executive Officer Daniel M. Junius will take over his duties as acting CFO, while simultaneously keeping the CEO job. The company is currently seeking a more permanent replacement for Perry.