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BlackRock Holdco 2, Inc.
> ACI
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2006 | ARCH RESOURCES, INC. | ACI | 2,240,500 | 2,240,500 | 94,929,985 | 94,929,985 | $42.37 |
| 03/31/2006 | ARCH RESOURCES, INC. | ACI | 1,115,700 | 1,115,700 | 84,726,258 | 84,726,258 | $75.94 |
| 12/31/2005 | ARCH RESOURCES, INC. | ACI | 1,123,000 | 1,123,000 | 89,278,500 | 89,278,500 | $79.50 |
| 09/30/2005 | ARCH RESOURCES, INC. | ACI | 1,374,400 | 1,374,400 | 92,772,000 | 92,772,000 | $67.50 |
| 06/30/2005 | ARCH RESOURCES, INC. | ACI | 1,145,800 | 1,145,800 | 62,411,726 | 62,411,726 | $54.47 |
| 03/31/2005 | ARCH RESOURCES, INC. | ACI | 1,150,300 | 1,150,300 | 49,474,403 | 49,474,403 | $43.01 |
| 12/31/2004 | ARCH RESOURCES, INC. | ACI | 20,000 | 20,000 | 710,800 | 710,800 | $35.54 |
| 09/30/2004 | ARCH RESOURCES, INC. | ACI | 20,000 | 20,000 | 709,800 | 709,800 | $35.49 |
| 06/30/2004 | ARCH RESOURCES, INC. | ACI | 20,000 | 20,000 | 731,800 | 731,800 | $36.59 |
| 03/31/2004 | ARCH RESOURCES, INC. | ACI | 12,500 | 12,500 | 392,375 | 392,375 | $31.39 |
| 12/31/2003 | ARCH RESOURCES, INC. | ACI | 12,500 | 12,500 | 389,625 | 389,625 | $31.17 |
| 09/30/2003 | ARCH RESOURCES, INC. | ACI | 700 | 700 | 15,547 | 15,547 | $22.21 |
| 06/30/2003 | ARCH RESOURCES, INC. | ACI | 450 | 450 | 10,341 | 10,341 | $22.98 |
| 03/31/2003 | ARCH RESOURCES, INC. | ACI | 33,900 | 33,900 | 644,439 | 644,439 | $19.01 |
| 12/31/2002 | ARCH RESOURCES, INC. | ACI | 33,500 | 33,500 | 723,265 | 723,265 | $21.59 |
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