X0304 4 2012-01-31 0 0000945699 IXYS CORP /DE/ IXYS 0001071349 ZOMMER NATHAN C/O 1590 BUCKEYE DRIVE MILPITAS CA 95035 1 1 1 0 Chairman of the Board Common Stock 2012-01-31 4 S 0 15345 14.0044 D 4692464 D Common Stock 2000000 I By Sharkz L.P. Common Stock 12360 I As Custodian The shares were sold in multiple trades at prices ranging from $14.00 to $14.069. The price reported above is the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and the prices at which the shares were sold upon receipt of a request from the SEC staff, the issuer or a security holder of the issuer. All sales reported above were pursuant to the reporting person's 10b5-1 plan. /s/ Nathan Zommer 2012-02-02