X0202 4 2006-09-14 0 0000064892 MENTOR CORP /MN/ MNT 0001159187 UBBEN JEFFREY W 435 PACIFIC AVENUE, FOURTH FLOOR SAN FRANCISCO CA 94133 1 0 0 0 0001129787 VA PARTNERS LLC 435 PACIFIC AVENUE FOURTH FLOOR SAN FRANCISCO CA 94133 1 0 0 0 0001351069 ValueAct Capital Management, L.P. 435 PACIFIC AVENUE, 4TH FLOOR SAN FRANCISCO CA 94133 1 0 0 0 0001351073 ValueAct Capital Management, LLC 435 PACIFIC AVENUE, 4TH FLOOR SAN FRANCISCO CA 94133 1 0 0 0 Restricted Stock 0 2006-09-14 4 A 0 2500 0 A 2007-09-14 2016-09-14 Common Stock 2500 7357 D Restrictions on stock lapse ratably over 5 years on each anniversary date. Column 8 is not a required reportable field. Under an agreement with ValueAct Capital Master Fund, L.P., Jeffrey W. Ubben is deemed to hold the shares for the benefit of ValueAct Capital Master Fund, L.P. and indirectly for (i) VA Partners, L.L.C. as General Partner of ValueAct Capital Master Fund, L.P. (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P. and (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P Jeffrey W. Ubben is a director of Mentor Corporation and Managing Member of VA Partners, L.L.C. and ValueAct Capital Management, LLC. Peter H. Kamin and George F. Hamel are Managing Members of VA Partners, L.L.C. and ValueAct Capital Management, LLC. The reporting persons disclaim beneficial ownership of the reported stock except to the extent of their pecuniary interest therein. Joint Filer Information: Name: ValueAct Capital Master Fund, L.P., Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: Jeffrey W. Ubben Issuer and Ticker Symbol: Mentor Corporation, (MNT) Date of Event Requiring Statement: September 14, 2006 Name: VA Partners, L.L.C. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: Jeffrey W. Ubben Issuer and Ticker Symbol: Mentor Corporation, (MNT) Date of Event Requiring Statement: September 14, 2006 Name: ValueAct Capital Management, L.P. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: Jeffrey W. Ubben Issuer and Ticker Symbol: Mentor Corporation, (MNT) Date of Event Requiring Statement: September 14, 2006 Name: ValueAct Capital Management, LLC Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: Jeffrey W. Ubben Issuer and Ticker Symbol: Mentor Corporation, (MNT) Date of Event Requiring Statement: September 14, 2006 Name: George F. Hamel, Jr. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: Jeffrey W. Ubben Issuer and Ticker Symbol: Mentor Corporation, (MNT) Date of Event Requiring Statement: September 14, 2006 Name: Peter H. Kamin Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: Jeffrey W. Ubben Issuer and Ticker Symbol: Mentor Corporation, (MNT) Date of Event Requiring Statement: September 14, 2006 /s/ Jeffrey W. Ubben 2006-09-18 VA PARTNERS, LLC, By:/s/ George F. Hamel, Jr., Managing Member 2006-09-18 VALUEACT CAPITAL MASTER FUND, L.P., By: VA PARTNERS, LLC, its General Partner, By:/s/ George F. Hamel, Jr., Managing Member 2006-09-18 VALUEACT CAPITAL MANAGEMENT, L.P., By: VALUEACT CAPITAL MANAGEMENT, LLC, its General Partner, By:/s/ George F. Hamel, Jr., Managing Member 2006-09-18 VALUEACT CAPITAL MANAGEMENT, LLC, By:/s/ George F. Hamel, Jr., Managing Member 2006-09-18 /s/ George F. Hamel, Jr. 2006-09-18 /s/ Peter H. Kamin 2006-09-18