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BlackRock Inc.
> RBCN
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2017 | Rubicon Technology, Inc. | RBCN | 537,025 | 537,025 | 447,000 | 447,000 | $0.83 |
| 09/30/2016 | Rubicon Technology, Inc. | RBCN | 0 | -735 | 0 | -3,000 | |
| 06/30/2015 | Rubicon Technology, Inc. | RBCN | 0 | -735 | 0 | -3,000 | |
| 03/31/2015 | Rubicon Technology, Inc. | RBCN | 735 | 0 | 3,000 | 0 | $4.08 |
| 12/31/2014 | Rubicon Technology, Inc. | RBCN | 735 | 0 | 3,000 | 0 | $4.08 |
| 09/30/2014 | Rubicon Technology, Inc. | RBCN | 735 | 0 | 3,000 | -3,000 | $4.08 |
| 06/30/2014 | Rubicon Technology, Inc. | RBCN | 735 | 206 | 6,000 | 0 | $8.16 |
| 03/31/2014 | Rubicon Technology, Inc. | RBCN | 529 | 0 | 6,000 | 1,000 | $11.34 |
| 12/31/2013 | Rubicon Technology, Inc. | RBCN | 529 | 529 | 5,000 | 5,000 | $9.45 |
| 09/30/2013 | Rubicon Technology, Inc. | RBCN | 529 | 529 | 6,000 | 6,000 | $11.34 |
| 06/30/2013 | Rubicon Technology, Inc. | RBCN | 529 | -171 | 4,000 | 0 | $7.56 |
| 03/31/2013 | Rubicon Technology, Inc. | RBCN | 700 | 0 | 4,000 | 0 | $5.71 |
| 12/31/2012 | Rubicon Technology, Inc. | RBCN | 700 | 0 | 4,000 | -3,000 | $5.71 |
| 09/30/2012 | Rubicon Technology, Inc. | RBCN | 700 | 0 | 7,000 | 0 | $10.00 |
| 06/30/2012 | Rubicon Technology, Inc. | RBCN | 700 | -8,186 | 7,000 | -86,000 | $10.00 |
| 03/31/2012 | Rubicon Technology, Inc. | RBCN | 8,886 | 8,186 | 93,000 | 85,000 | $10.47 |
| 12/31/2011 | Rubicon Technology, Inc. | RBCN | 8,365 | 7,665 | 79,000 | 71,000 | $9.44 |
| 09/30/2011 | Rubicon Technology, Inc. | RBCN | 700 | -404 | 8,000 | -11,000 | $11.43 |
| 06/30/2011 | Rubicon Technology, Inc. | RBCN | 1,104 | 0 | 19,000 | -12,000 | $17.21 |
| 03/31/2011 | Rubicon Technology, Inc. | RBCN | 1,104 | 0 | 31,000 | 7,000 | $28.08 |
| 12/31/2010 | Rubicon Technology, Inc. | RBCN | 1,104 | 933 | 24,000 | 20,000 | $21.74 |
| 09/30/2010 | Rubicon Technology, Inc. | RBCN | 171 | 171 | 4,000 | 4,000 | $23.39 |
| 09/30/2009 | Rubicon Technology, Inc. | RBCN | 0 | -3,510 | 0 | -50,000 | |
| 06/30/2009 | Rubicon Technology, Inc. | RBCN | 3,510 | 3,510 | 50,000 | 50,000 | $14.25 |
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