X0303 4 2010-12-13 0000019446 CANTEL MEDICAL CORP CMN 0000905400 DIKER CHARLES M 745 FIFTH AVE. NEW YORK NY 10153 1 1 1 0 Chairman Common Stock, par value $.10 per share 2010-12-13 5 G 0 550 0 D 1816463 D Common Stock, par value $.10 per share 2010-12-13 5 G 0 550 0 D 264255 I By reporting person's wife Common Stock, par value $.10 per share 2010-12-13 5 G 0 1100 0 D 1815363 D Common Stock, par value $.10 per share 2010-12-13 5 G 0 1100 0 D 263155 I By reporting person's wife Common Stock, par value $.10 per share 2010-12-13 5 G 0 2200 0 A 251844 I By trusts for benefit of children Common Stock, par value $.10 per share 2010-12-13 5 G 0 3850 0 D 1811513 D Common Stock, par value $.10 per share 2010-12-13 5 G 0 3850 0 D 259305 I By reporting person's wife Common Stock, par value $.10 per share 2010-12-13 5 G 0 7700 0 A 64876 I By custodial accounts for benefit of grandchildren Common Stock, par value $.10 per share 2010-12-13 5 G 0 2000 0 D 249844 I By trusts for benefit of children Common Stock, par value $.10 per share 2010-12-14 5 G 0 1100 0 D 248744 I By trusts for benefit of children Common Stock, par value $.10 per share 13080 I Shares held by Dico Group, Inc. This transaction involved a gift of securities by the reporting person to a trust for the benefit of his adult children, none of whom share reporting person's household. The reporting person is a trustee of the trust and therefore may be deemed the beneficial owner of such shares. This transaction involved a gift of securities by the reporting person's wife to a trust for the benefit of her/reporting person's adult children, none of whom share reporting person's household. The reporting person is a trustee of the trust and therefore may be deemed the beneficial owner of such shares. This transaction involved gifts of securities by the reporting person to custodial accounts for benefit of his grandchildren. Certain of the custodial accounts are brokerage accounts to which the reporting person had trading discretion and therefore may have been deemed the beneficial owner of such shares when he had such trading discretion. This transaction involved gifts of securities by the reporting person's wife to a custodial account for benefit of her grandchildren. Certain of the custodial accounts are brokerage accounts to which the reporting person had trading discretion. /s/ Charles M. Diker 2011-01-13