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BARTLETT & CO
> SIAL
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2011 | SIGMA ALDRICH CORP | SIAL | 4,310 | -2,632 | 270,000 | -159,000 | $62.65 |
| 09/30/2011 | SIGMA ALDRICH CORP | SIAL | 6,942 | -10 | 429,000 | -82,000 | $61.80 |
| 08/11/2011 | SIGMA ALDRICH CORP | SIAL | 6,952 | 2,622 | 511,000 | 235,000 | $73.50 |
| 05/12/2011 | SIGMA ALDRICH CORP | SIAL | 4,330 | -75 | 276,000 | -18,000 | $63.74 |
| 02/11/2011 | SIGMA ALDRICH CORP | SIAL | 4,405 | 0 | 294,000 | 28,000 | $66.74 |
| 11/12/2010 | SIGMA ALDRICH CORP | SIAL | 4,405 | -15 | 266,000 | 45,000 | $60.39 |
| 08/12/2010 | SIGMA ALDRICH CORP | SIAL | 4,420 | 10 | 221,000 | -16,000 | $50.00 |
| 03/31/2010 | SIGMA ALDRICH CORP | SIAL | 4,410 | 10 | 237,000 | 14,000 | $53.74 |
| 02/12/2010 | SIGMA ALDRICH CORP | SIAL | 4,400 | 0 | 223,000 | -15,000 | $50.68 |
| 09/30/2009 | SIGMA ALDRICH CORP | SIAL | 4,400 | 0 | 238,000 | 19,000 | $54.09 |
| 06/30/2009 | SIGMA ALDRICH CORP | SIAL | 4,400 | 0 | 219,000 | 52,000 | $49.77 |
| 03/31/2009 | SIGMA ALDRICH CORP | SIAL | 4,400 | 4,400 | 167,000 | 167,000 | $37.95 |
| 12/31/2008 | SIGMA ALDRICH CORP | SIAL | 4,400 | 0 | 186,000 | -45,000 | $42.27 |
| 09/30/2008 | SIGMA ALDRICH CORP | SIAL | 4,400 | 0 | 231,000 | -6,000 | $52.50 |
| 06/30/2008 | SIGMA ALDRICH CORP | SIAL | 4,400 | 4,400 | 237,000 | 237,000 | $53.86 |
| 03/31/2008 | SIGMA ALDRICH CORP | SIAL | 4,400 | 0 | 263,000 | 22,000 | $59.77 |
| 12/31/2007 | SIGMA ALDRICH CORP | SIAL | 4,400 | 4,400 | 241,000 | 241,000 | $54.77 |
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