Annual Meeting of Stockholders

June 18, 2018 • 10:00am EDT

Nationwide Hotel and Conference Center, 100 Green Meadows Drive South, Lewis Center, Ohio 43035

13th Annual MEC Workshop

May 21–May 23, 2018

Krakow, Poland

First Quarter 2018 Financial Results Conference Call

May 21, 2018 • 5:00pm EDT

Webcast

A playback of the call is available through June 21st, 2018. To listen, call 1-844-512-2921 within the United States or 1-412-317-6671 when calling internationally. Please use the replay pin number 9714385.

Fourth Quarter 2017 Financial Results Conference Call

April 17, 2018 • 5:00pm EDT

Webcast