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ARTISAN PARTNERS HOLDINGS LP
> MASI
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2011 | MASIMO CORP | MASI | 780,500 | -1,172,100 | 23,165,000 | -41,466,000 | $29.68 |
| 03/31/2011 | MASIMO CORP | MASI | 1,952,600 | 290,300 | 64,631,000 | 16,308,000 | $33.10 |
| 12/31/2010 | MASIMO CORP | MASI | 1,662,300 | -107,900 | 48,323,000 | -21,000 | $29.07 |
| 09/30/2010 | MASIMO CORP | MASI | 1,770,200 | 1,184,500 | 48,344,000 | 34,398,000 | $27.31 |
| 06/30/2010 | MASIMO CORP | MASI | 585,700 | 235,700 | 13,946,000 | 4,654,000 | $23.81 |
| 03/31/2010 | MASIMO CORP | MASI | 350,000 | -1,900 | 9,292,000 | -1,413,000 | $26.55 |
| 12/31/2009 | MASIMO CORP | MASI | 351,900 | -123,100 | 10,705,000 | -1,740,000 | $30.42 |
| 09/30/2009 | MASIMO CORP | MASI | 475,000 | 250,000 | 12,445,000 | 7,020,000 | $26.20 |
| 06/30/2009 | MASIMO CORP | MASI | 225,000 | 225,000 | 5,425,000 | 5,425,000 | $24.11 |
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