Godwin Mary E. 4

4 · Isilon Systems, Inc. · Filed Dec 21, 2010

Form 4

Period: 2010-12-17

VP Operations

Transactions

Disposition from Tender
Common Stock
2010-12-21$33.85/sh−6,600$223,410→ 0 total
Disposition to Issuer
Right to Buy (Common Stock)
2010-12-21−115,000→ 0 total
Exercise: $7.36From: 2011-02-09Exp: 2020-02-09→ Common Stock (115,000 underlying)
Disposition from Tender
Common Stock
2010-12-17$33.85/sh−217$7,345→ 6,600 total
Disposition to Issuer
Right to Buy (Common Stock)
2010-12-21−80,720→ 0 total
Exercise: $2.57From: 2010-05-01Exp: 2019-05-15→ Common Stock (80,720 underlying)
Disposition to Issuer
Right to Buy (Common Stock)
2010-12-21−166,520→ 0 total
Exercise: $4.90From: 2009-07-09Exp: 2018-08-05→ Common Stock (166,520 underlying)

Footnotes (5)

[F1]Includes 217 shares acquired under the issuer's Employee Stock Purchase Plan on December 6, 2010.
[F2]Pursuant to the terms of the merger agreement between issuer, EMC Corporation and a subsidiary of EMC, this restricted stock unit was cancelled on the effective date of the merger in exchange for a cash payment equal to the offer price of $33.85 per share.
[F3]Pursuant to the terms of the merger agreement, (i) 68,082 shares under this option were cancelled on the effective date of the merger in exchange for a cash payment equal to, on a per share basis, the offer price of $33.85 less the exercise price, and (ii) 98,438 shares under this option were assumed and exchanged for an option to purchase shares of EMC common stock.
[F4]Pursuant to the terms of the merger agreement, this option was assumed and exchanged for an option to purchase shares of EMC common stock.
[F5]Pursuant to the terms of the merger agreement, (i) 18,220 shares under this option were cancelled on the effective date of the merger in exchange for a cash payment equal to, on a per share basis, the offer price of $33.85 less the exercise price, and (ii) 62,500 shares under this option were assumed and exchanged for an option to purchase shares of EMC common stock.

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