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DIMENSIONAL FUND ADVISORS LP
> PPCO
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2010 | PENWEST PHARMACEUTICALS CO | PPCO | 671,814 | 11,172 | 2,217,000 | -62,000 | $3.30 |
| 03/31/2010 | PENWEST PHARMACEUTICALS CO | PPCO | 660,642 | -4,900 | 2,279,000 | 555,000 | $3.45 |
| 12/31/2009 | PENWEST PHARMACEUTICALS CO | PPCO | 665,542 | 161,509 | 1,724,000 | 671,000 | $2.59 |
| 09/30/2009 | PENWEST PHARMACEUTICALS CO | PPCO | 504,033 | 30,447 | 1,053,000 | -296,000 | $2.09 |
| 06/30/2009 | PENWEST PHARMACEUTICALS CO | PPCO | 473,586 | 48,150 | 1,349,000 | 651,000 | $2.85 |
| 03/31/2009 | PENWEST PHARMACEUTICALS CO | PPCO | 425,436 | -15,734 | 698,000 | 5,000 | $1.64 |
| 12/31/2008 | PENWEST PHARMACEUTICALS CO | PPCO | 441,170 | -33,251 | 693,000 | -284,000 | $1.57 |
| 09/30/2008 | PENWEST PHARMACEUTICALS CO | PPCO | 474,421 | 474,421 | 977,000 | 977,000 | $2.06 |
| 06/30/2008 | PENWEST PHARMACEUTICALS CO | PPCO | 435,749 | 435,749 | 1,177,000 | 1,177,000 | $2.70 |
| 03/31/2008 | PENWEST PHARMACEUTICALS CO | PPCO | 459,757 | 459,757 | 1,195,000 | 1,195,000 | $2.60 |
| 12/31/2007 | PENWEST PHARMACEUTICALS CO | PPCO | 461,157 | -41,025 | 2,698,000 | -2,831,000 | $5.85 |
| 09/30/2007 | PENWEST PHARMACEUTICALS CO | PPCO | 502,182 | 40,400 | 5,529,000 | -229,000 | $11.01 |
| 06/30/2007 | PENWEST PHARMACEUTICALS CO | PPCO | 461,782 | 1,600 | 5,758,000 | 1,119,000 | $12.47 |
| 03/31/2007 | PENWEST PHARMACEUTICALS CO | PPCO | 460,182 | -2,400 | 4,639,000 | -3,049,000 | $10.08 |
| 12/29/2006 | PENWEST PHARMACEUTICALS CO | PPCO | 462,582 | 9,900 | 7,688,000 | 151,000 | $16.62 |
| 09/30/2006 | PENWEST PHARMACEUTICALS CO | PPCO | 452,682 | 21,500 | 7,537,000 | -1,876,000 | $16.65 |
| 06/30/2006 | PENWEST PHARMACEUTICALS CO | PPCO | 431,182 | 1,800 | 9,413,000 | 100,000 | $21.83 |
| 03/31/2006 | PENWEST PHARMACEUTICALS CO | PPCO | 429,382 | 27,100 | 9,313,000 | 1,460,000 | $21.69 |
| 12/30/2005 | PENWEST PHARMACEUTICALS CO | PPCO | 402,282 | 21,769 | 7,853,000 | 3,355,000 | $19.52 |
| 09/30/2005 | PENWEST PHARMACEUTICALS CO | PPCO | 395,713 | 15,200 | 6,937,000 | 2,439,000 | $17.53 |
| 06/30/2005 | PENWEST PHARMACEUTICALS CO | PPCO | 380,513 | 12,034 | 4,498,000 | -56,000 | $11.82 |
| 03/31/2005 | PENWEST PHARMACEUTICALS CO | PPCO | 368,479 | 50,700 | 4,554,000 | 966,000 | $12.36 |
| 12/31/2004 | PENWEST PHARMACEUTICALS CO | PPCO | 321,079 | 3,300 | 3,840,000 | 252,000 | $11.96 |
| 09/30/2004 | PENWEST PHARMACEUTICALS CO | PPCO | 317,779 | 2,850 | 3,588,000 | -446,000 | $11.29 |
| 06/30/2004 | PENWEST PHARMACEUTICALS CO | PPCO | 314,929 | 10,254 | 4,034,000 | -417,000 | $12.81 |
| 03/31/2004 | PENWEST PHARMACEUTICALS CO | PPCO | 304,675 | 4,100 | 4,451,000 | -743,000 | $14.61 |
| 12/31/2003 | PENWEST PHARMACEUTICALS CO | PPCO | 300,575 | -6,900 | 5,194,000 | -1,361,000 | $17.28 |
| 09/30/2003 | PENWEST PHARMACEUTICALS CO | PPCO | 307,475 | -25,700 | 6,555,000 | -1,564,000 | $21.32 |
| 06/30/2003 | PENWEST PHARMACEUTICALS CO | PPCO | 333,175 | -16,200 | 8,119,000 | 2,613,000 | $24.37 |
| 03/31/2003 | PENWEST PHARMACEUTICALS CO | PPCO | 349,375 | -27,400 | 5,506,000 | 1,495,000 | $15.76 |
| 12/31/2002 | PENWEST PHARMACEUTICALS CO | PPCO | 376,775 | -1,600 | 4,011,000 | 869,000 | $10.65 |
| 09/30/2002 | PENWEST PHARMACEUTICALS CO | PPCO | 378,375 | 4,500 | 3,142,000 | -4,169,000 | $8.30 |
| 06/30/2002 | PENWEST PHARMACEUTICALS CO | PPCO | 373,875 | -400 | 7,311,000 | 71,000 | $19.55 |
| 03/31/2002 | PENWEST PHARMACEUTICALS CO | PPCO | 374,275 | 900 | 7,240,000 | -242,000 | $19.34 |
| 12/31/2001 | PENWEST PHARMACEUTICALS CO | PPCO | 373,375 | -2,500 | 7,482,000 | 1,008,000 | $20.04 |
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