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Mathematica Capital Management, LLC
> HP
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 09/30/2008 | Helmerich & Payne, Inc. | HP | 161 | -1,769 | 7,000 | -83,000 | $43.48 |
| 03/31/2008 | Helmerich & Payne, Inc. | HP | 1,930 | 1,930 | 90,000 | 90,000 | $46.63 |
| 12/31/2007 | Helmerich & Payne, Inc. | HP | 2,652 | -748 | 106,000 | -6,000 | $39.97 |
| 09/30/2007 | Helmerich & Payne, Inc. | HP | 3,400 | 3,400 | 112,000 | 112,000 | $32.94 |
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