JOCHUM PETER DR 4

4 · DIONEX CORP /DE · Filed May 20, 2011

Form 4

Period: 2011-05-17

Sr. Vice President

Transactions

Disposition to Issuer
Nonqualified Stock Option
2011-05-17−15,000→ 49,719 total
Exercise: $53.38Exp: 2011-05-17→ Common Stock (15,000 underlying)
Disposition to Issuer
Restricted Stock Unit
2011-05-17−2,500→ 2,444 total
Exercise: $0.00Exp: 2011-05-17→ Common Stock (2,500 underlying)
Disposition to Issuer
Nonqualified Stock Option
2011-05-17−5,000→ 80,719 total
Exercise: $47.19Exp: 2011-05-17→ Common Stock (5,000 underlying)
Disposition to Issuer
Nonqualified Stock Option
2011-05-17−9,775→ 6,944 total
Exercise: $76.30Exp: 2011-05-17→ Common Stock (9,775 underlying)
Disposition to Issuer
Restricted Stock Unit
2011-05-17−2,000→ 4,944 total
Exercise: $0.00Exp: 2011-05-17→ Common Stock (2,000 underlying)
Disposition to Issuer
Restricted Stock Unit
2011-05-17−1,222→ 1,222 total
Exercise: $0.00Exp: 2011-05-17→ Common Stock (1,222 underlying)
Disposition to Issuer
Nonqualified Stock Option
2011-05-17−10,000→ 16,719 total
Exercise: $64.71Exp: 2011-05-17→ Common Stock (10,000 underlying)
Disposition to Issuer
Nonqualified Stock Option
2011-05-17−16,000→ 64,719 total
Exercise: $48.05Exp: 2011-05-17→ Common Stock (16,000 underlying)
Disposition to Issuer
Nonqualified Stock Option
2011-05-17−8,000→ 26,719 total
Exercise: $74.47Exp: 2011-05-17→ Common Stock (8,000 underlying)
Disposition to Issuer
Performance Restricted Stock Unit
2011-05-17−1,222→ 0 total
Exercise: $0.00Exp: 2011-05-17→ Common Stock (1,222 underlying)

Footnotes (3)

[F1]Disposed of pursuant to the Agreement and Plan of Merger dated December 12, 2010 by and among the Issuer, Thermo Fisher Scientific, Inc. and Weston D Merger Co.
[F2]Pursuant to the Merger Agreement, this option was cancelled in exchange for a cash payment equal to the product of (i) the number of the Issuer's common stock subject to the option multiplied by (ii) the excess of $118.50 over the per share exercise price of the option.
[F3]Restricted Stock Units do not have an exercise price so this column is not applicable. Each restricted stock unit represents the right to receive one share of common stock which was disposed of pursuant to the Merger Agreement for $118.50 per share.

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