The Minneapolis / St. Paul Business Journal reports that Arctic Cat CEO Christopher Twomey, who led the snowmobile maker for 24 years, will step down at the end of 2010. Cat reported second quarter earnings up 20 percent on higher snowmobile and ATV sales, with shares up $1.55, or about 12.5 percent, to $13.94 per share, at market close on 10/28/10. Read more