X0202 4 2006-03-31 0 0000717238 MSC SOFTWARE CORP MNSC 0001129787 VA PARTNERS LLC 435 PACIFIC AVENUE FOURTH FLOOR SAN FRANCISCO CA 94133 1 0 1 0 0001351069 ValueAct Capital Management, L.P. 435 PACIFIC AVENUE, 4TH FLOOR SAN FRANCISCO CA 94133 1 0 1 0 0001351073 ValueAct Capital Management, LLC 435 PACIFIC AVENUE, 4TH FLOOR SAN FRANCISCO CA 94133 1 0 1 0 0001159187 UBBEN JEFFREY W 435 PACIFIC AVENUE, FOURTH FLOOR SAN FRANCISCO CA 94133 0 0 1 0 0000937541 KAMIN PETER H TWO INTERNATIONAL PLACE, 25TH FLOOR BOSTON MA 02110 0 0 1 0 Common Stock 2006-03-31 4 J 0 27274 D 3432526 I See footnote In connection with the dissolution of ValueAct Capital Partners Co-Investors, L.P. on March 31, 2006, 27,274 shares were distributed in-kind to such partnership's sole limited partner. As General Partner of ValueAct Capital Master Fund, L.P. and ValueAct Capital Partners Co-Investors, L.P. The reported stock is owned directly by ValueAct Capital Master Fund, L.P and ValueAct Capital Partners Co-Investors, L.P. and may be deemed to be beneficially owned by (i) VA Partners, L.L.C. as General Partner of ValueAct Capital Master Fund, L.P. and ValueAct Capital Partners Co-Investors, L.P., (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P. and ValueAct Capital Partners Co-Investors, L.P. and (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P. Jeffrey W. Ubben, Peter H. Kamin and George F. Hamel, Jr. 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: VA Partners, L.L.C. Issuer and Ticker Symbol: MSC.Software Corporation (MNSC) Date of Event Requiring Statement: March 31, 2006 Name: ValueAct Capital Partners Co-Investors, L.P. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: MSC.Software Corporation (MNSC) Date of Event Requiring Statement: March 31, 2006 Name: ValueAct Capital Management, L.P. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: MSC.Software Corporation (MNSC) Date of Event Requiring Statement: March 31, 2006 Name: ValueAct Capital Management, LLC Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: MSC.Software Corporation (MNSC) Date of Event Requiring Statement: March 31, 2006 Name: Jeffrey W. Ubben Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: MSC.Software Corporation (MNSC) Date of Event Requiring Statement: March 31, 2006 Name: George F. Hamel, Jr. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: MSC.Software Corporation (MNSC) Date of Event Requiring Statement: March 31, 2006 Name: Peter H. Kamin Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: MSC.Software Corporation (MNSC) Date of Event Requiring Statement: March 31, 2006 VA PARTNERS, L.L.C., By:/s/ George F. Hamel. Jr., Managing Member 2006-04-04 VALUEACT CAPITAL MASTER FUND, L.P., By: VA PARTNERS, L.L.C., its General Partner, By:/s/ George F. Hamel. Jr., Managing Member 2006-04-04 VALUEACT CAPITAL PARTNERS CO-INVESTORS, L.P., By: VA PARTNERS, L.L.C., its General Partner, By:/s/ George F. Hamel. Jr., Managing Member 2006-04-04 VALUEACT CAPITAL MANAGEMENT, L.P., By: VALUEACT CAPITAL MANAGEMENT, LLC, its General Partner, By:/s/ George F. Hamel. Jr., Managing Member 2006-04-04 VALUEACT CAPITAL MANAGEMENT, LLC, By:/s/ George F. Hamel. Jr., Managing Member 2006-04-04 /s/ Jeffrey W. Ubben 2006-04-04 /s/ George F. Hamel, Jr. 2006-04-04 /s/ Peter H. Kamin 2006-04-04