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FIRST NEW YORK SECURITIES LLC
> ATCO
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2009 | AMERICAN TECHNOLOGY CORP | ATCO | 24,657 | -343 | 36,000 | -8,000 | $1.46 |
| 09/30/2009 | AMERICAN TECHNOLOGY CORP | ATCO | 25,000 | 5,000 | 44,000 | 6,000 | $1.76 |
| 06/30/2009 | AMERICAN TECHNOLOGY CORP | ATCO | 20,000 | -30,000 | 38,000 | 10,000 | $1.90 |
| 03/31/2009 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -50,000 | 0 | -28,000 | |
| 12/31/2008 | AMERICAN TECHNOLOGY CORP | ATCO | 50,000 | 22,000 | 28,000 | -24,000 | $0.56 |
| 06/30/2008 | AMERICAN TECHNOLOGY CORP | ATCO | 28,000 | 28,000 | 52,000 | 52,000 | $1.86 |
| 03/31/2008 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -15,921 | 0 | -40,000 | |
| 12/31/2007 | AMERICAN TECHNOLOGY CORP | ATCO | 15,921 | -15,210 | 40,000 | -78,000 | $2.51 |
| 09/30/2007 | AMERICAN TECHNOLOGY CORP | ATCO | 31,131 | -123,881 | 118,000 | -490,000 | $3.79 |
| 06/30/2007 | AMERICAN TECHNOLOGY CORP | ATCO | 216,387 | 61,375 | 816,000 | 208,000 | $3.77 |
| 12/31/2006 | AMERICAN TECHNOLOGY CORP | ATCO | 155,012 | 94,812 | 608,000 | 378,000 | $3.92 |
| 09/30/2006 | AMERICAN TECHNOLOGY CORP | ATCO | 60,200 | 60,200 | 230,000 | 230,000 | $3.82 |
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