| Filed On | Filing |
|---|---|
| 14 Dec 2007 |
Form 3: Biar Louis Scott, VP, Controller
No securities owned |
| 04 Jun 2007 | Form 3: Hibbeler Jeffrey C, VP, Technology & Logistics |
| 30 Mar 2007 |
Form 3: Coleman Ronald F, VP, NA Pressure Pumping Svcs
Holds 35,719 shares of Common Stock |
| 02 May 2006 |
Form 3: Wells Douglas Bret, Treasurer & Chief Tax Officer
Holds 808 shares of Common Stock |
| 03 Mar 2006 |
Form 3: Yust Paul F, Chief Information Officer
No securities owned |
| 19 Oct 2005 |
Form 3: Buchanan Alasdair I, VP-Logistics & Technology
Holds 872 shares of Common Stock |
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