X0306 4 2017-02-21 0 0000815093 MGC DIAGNOSTICS Corp MGCD 0001551199 STRUIK HENDRIK 726 THOMAS COURT LIBERTYVILLE IL 60048 1 0 0 0 Common Stock 2017-02-21 4 P 0 1934 9.41 A 62934 I By Trust Common Stock 2017-05-01 4 A 0 1173 8.52 A 4764 D Common Stock 5053 I By Trust Shares purchased through broker-sponsored Dividend Reinvestment Plan on February 21, 2017. Shares held by the reporting person's spouse, Kim Struik, in the Kim Struik Trust. Shares held by reporting person in the Hendrik Struik Trust. Suzette McNally, Attorney-in-Fact for Hendrik Struik 2017-05-03