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VALUE LINE INC
> SIAL
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2010 | SIGMA ALDRICH CORP | SIAL | 0 | -157,400 | 0 | -9,504,000 | |
| 09/30/2010 | SIGMA ALDRICH CORP | SIAL | 157,400 | -400 | 9,504,000 | 1,641,000 | $60.38 |
| 06/30/2010 | SIGMA ALDRICH CORP | SIAL | 157,800 | 0 | 7,863,000 | -605,000 | $49.83 |
| 03/31/2010 | SIGMA ALDRICH CORP | SIAL | 157,800 | -49,000 | 8,468,000 | -1,986,000 | $53.66 |
| 12/31/2009 | SIGMA ALDRICH CORP | SIAL | 206,800 | 0 | 10,454,000 | -709,000 | $50.55 |
| 09/30/2009 | SIGMA ALDRICH CORP | SIAL | 206,800 | 38,000 | 11,163,000 | 2,797,000 | $53.98 |
| 06/30/2009 | SIGMA ALDRICH CORP | SIAL | 168,800 | 24,000 | 8,366,000 | 2,894,000 | $49.56 |
| 03/31/2009 | SIGMA ALDRICH CORP | SIAL | 144,800 | 0 | 5,472,000 | -644,000 | $37.79 |
| 12/31/2008 | SIGMA ALDRICH CORP | SIAL | 144,800 | 0 | 6,116,000 | -1,474,000 | $42.24 |
| 09/30/2008 | SIGMA ALDRICH CORP | SIAL | 144,800 | -71,000 | 7,590,000 | -4,033,000 | $52.42 |
| 06/30/2008 | SIGMA ALDRICH CORP | SIAL | 215,800 | 71,000 | 11,623,000 | 2,986,000 | $53.86 |
| 03/31/2008 | SIGMA ALDRICH CORP | SIAL | 144,800 | 0 | 8,637,000 | 731,000 | $59.65 |
| 12/31/2007 | SIGMA ALDRICH CORP | SIAL | 144,800 | 0 | 7,906,000 | 848,000 | $54.60 |
| 09/30/2007 | SIGMA ALDRICH CORP | SIAL | 144,800 | 0 | 7,058,000 | 879,000 | $48.74 |
| 06/30/2007 | SIGMA ALDRICH CORP | SIAL | 144,800 | 0 | 6,179,000 | 167,000 | $42.67 |
| 03/31/2007 | SIGMA ALDRICH CORP | SIAL | 144,800 | 72,400 | 6,012,000 | 385,000 | $41.52 |
| 12/31/2006 | SIGMA ALDRICH CORP | SIAL | 72,400 | 0 | 5,627,000 | 148,000 | $77.72 |
| 09/30/2006 | SIGMA ALDRICH CORP | SIAL | 72,400 | 0 | 5,479,000 | 220,000 | $75.68 |
| 06/30/2006 | SIGMA ALDRICH CORP | SIAL | 72,400 | 31,000 | 5,259,000 | 2,535,000 | $72.64 |
| 03/31/2006 | SIGMA ALDRICH CORP | SIAL | 41,400 | 0 | 2,724,000 | 104,000 | $65.80 |
| 12/31/2005 | SIGMA ALDRICH CORP | SIAL | 41,400 | 0 | 2,620,000 | -32,000 | $63.29 |
| 09/30/2005 | SIGMA ALDRICH CORP | SIAL | 41,400 | 31,400 | 2,652,000 | 2,092,000 | $64.06 |
| 06/30/2005 | SIGMA ALDRICH CORP | SIAL | 10,000 | 0 | 560,000 | -53,000 | $56.00 |
| 03/31/2005 | SIGMA ALDRICH CORP | SIAL | 10,000 | 10,000 | 613,000 | 613,000 | $61.30 |
| 03/31/2004 | SIGMA ALDRICH CORP | SIAL | 0 | -58,000 | 0 | -3,316,000 | |
| 12/31/2003 | SIGMA ALDRICH CORP | SIAL | 58,000 | -18,000 | 3,316,000 | -647,000 | $57.17 |
| 09/30/2003 | SIGMA ALDRICH CORP | SIAL | 76,000 | 0 | 3,963,000 | -165,000 | $52.14 |
| 06/30/2003 | SIGMA ALDRICH CORP | SIAL | 76,000 | 0 | 4,128,000 | 747,000 | $54.32 |
| 03/31/2003 | SIGMA ALDRICH CORP | SIAL | 76,000 | 0 | 3,381,000 | -364,000 | $44.49 |
| 12/31/2002 | SIGMA ALDRICH CORP | SIAL | 76,000 | 0 | 3,701,000 | -44,000 | $48.70 |
| 09/30/2002 | SIGMA ALDRICH CORP | SIAL | 76,000 | 14,000 | 3,745,000 | 833,000 | $49.28 |
| 06/30/2002 | SIGMA ALDRICH CORP | SIAL | 62,000 | 0 | 3,109,000 | 197,000 | $50.15 |
| 03/31/2002 | SIGMA ALDRICH CORP | SIAL | 62,000 | -30,000 | 2,912,000 | -1,246,000 | $46.97 |
| 12/31/2001 | SIGMA ALDRICH CORP | SIAL | 62,000 | -30,000 | 2,443,000 | -1,715,000 | $39.40 |
| 09/30/2001 | SIGMA ALDRICH CORP | SIAL | 92,000 | 0 | 4,158,000 | 604,960 | $45.20 |
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