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> NADX
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2010 | NATIONAL DENTEX CORP /MA/ | NADX | 78,671 | 18,561 | 1,326,000 | 737,000 | $16.86 |
| 03/31/2010 | NATIONAL DENTEX CORP /MA/ | NADX | 60,110 | -998 | 589,000 | -28,000 | $9.80 |
| 12/31/2009 | NATIONAL DENTEX CORP /MA/ | NADX | 61,108 | 30,000 | 617,000 | 180,000 | $10.10 |
| 09/30/2009 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 06/30/2009 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 03/31/2009 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 12/31/2008 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 09/30/2008 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 06/30/2008 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 03/31/2008 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 12/31/2007 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 09/30/2007 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -31,108 | 0 | -437,000 | |
| 06/30/2007 | NATIONAL DENTEX CORP /MA/ | NADX | 32,583 | 1,475 | 612,000 | 175,000 | $18.78 |
| 03/31/2007 | NATIONAL DENTEX CORP /MA/ | NADX | 31,108 | 7,609 | 437,000 | -43,000 | $14.05 |
| 12/31/2006 | NATIONAL DENTEX CORP /MA/ | NADX | 31,114 | 7,615 | 544,000 | 64,000 | $17.48 |
| 09/30/2006 | NATIONAL DENTEX CORP /MA/ | NADX | 37,948 | 14,449 | 744,000 | 264,000 | $19.61 |
| 06/30/2006 | NATIONAL DENTEX CORP /MA/ | NADX | 37,761 | 14,262 | 875,000 | 395,000 | $23.17 |
| 03/31/2006 | NATIONAL DENTEX CORP /MA/ | NADX | 35,631 | 12,132 | 827,000 | 347,000 | $23.21 |
| 12/31/2005 | NATIONAL DENTEX CORP /MA/ | NADX | 34,656 | 11,157 | 781,000 | 301,000 | $22.54 |
| 09/30/2005 | NATIONAL DENTEX CORP /MA/ | NADX | 35,594 | 12,095 | 733,000 | 253,000 | $20.59 |
| 06/30/2005 | NATIONAL DENTEX CORP /MA/ | NADX | 35,324 | 11,825 | 651,000 | 171,000 | $18.43 |
| 03/31/2005 | NATIONAL DENTEX CORP /MA/ | NADX | 35,837 | 12,338 | 705,000 | 225,000 | $19.67 |
| 12/31/2004 | NATIONAL DENTEX CORP /MA/ | NADX | 35,837 | 35,837 | 1,091,000 | 1,091,000 | $30.44 |
| 09/30/2004 | NATIONAL DENTEX CORP /MA/ | NADX | 24,174 | 675 | 681,000 | 201,000 | $28.17 |
| 06/30/2004 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -24,828 | 0 | -675,000 | |
| 03/31/2004 | NATIONAL DENTEX CORP /MA/ | NADX | 24,828 | 1,329 | 675,000 | 195,000 | $27.19 |
| 12/31/2003 | NATIONAL DENTEX CORP /MA/ | NADX | 24,828 | 1,329 | 595,000 | 115,000 | $23.96 |
| 09/30/2003 | NATIONAL DENTEX CORP /MA/ | NADX | 22,833 | -666 | 502,000 | 22,000 | $21.99 |
| 06/30/2003 | NATIONAL DENTEX CORP /MA/ | NADX | 23,499 | 23,499 | 480,000 | 480,000 | $20.43 |
| 03/31/2003 | NATIONAL DENTEX CORP /MA/ | NADX | 0 | -20,426 | 0 | -399,000 | |
| 12/31/2002 | NATIONAL DENTEX CORP /MA/ | NADX | 20,426 | 3,372 | 399,000 | 91,000 | $19.53 |
| 09/30/2002 | NATIONAL DENTEX CORP /MA/ | NADX | 17,054 | 1,800 | 308,000 | -60,000 | $18.06 |
| 06/28/2002 | NATIONAL DENTEX CORP /MA/ | NADX | 15,254 | 888 | 368,000 | -9,000 | $24.12 |
| 03/28/2002 | NATIONAL DENTEX CORP /MA/ | NADX | 14,366 | 600 | 377,000 | 45,000 | $26.24 |
| 12/31/2001 | NATIONAL DENTEX CORP /MA/ | NADX | 13,766 | -7,387 | 332,000 | -112,000 | $24.12 |
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