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WESTCHESTER CAPITAL MANAGEMENT INC
> ARG
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2010 | AIRGAS INC | ARG | 1,625,261 | 147,400 | 101,514,000 | 1,094,000 | $62.46 |
| 09/30/2010 | AIRGAS INC | ARG | 1,477,861 | 279,858 | 100,420,000 | 25,905,000 | $67.95 |
| 06/30/2010 | AIRGAS INC | ARG | 1,198,003 | -89,685 | 74,515,000 | -7,408,000 | $62.20 |
| 03/31/2010 | AIRGAS INC | ARG | 1,287,688 | 1,287,688 | 81,923,000 | 81,923,000 | $63.62 |
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