News + Filings Key Docs Holdings Ownership
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BlackRock Institutional Trust Company, N.A.
> ATCO
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2010 | AMERICAN TECHNOLOGY CORP | ATCO | 913,366 | 339 | 1,407,000 | 56,000 | $1.54 |
| 12/31/2009 | AMERICAN TECHNOLOGY CORP | ATCO | 913,027 | 313,383 | 1,351,000 | -1,035,000 | $1.48 |
| 09/30/2009 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 06/30/2009 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 03/31/2009 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 12/31/2008 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 09/30/2008 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 06/30/2008 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 03/31/2008 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 12/31/2007 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 09/30/2007 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -599,644 | 0 | -2,386,000 | |
| 06/30/2007 | AMERICAN TECHNOLOGY CORP | ATCO | 605,321 | 5,677 | 2,282,000 | -104,000 | $3.77 |
| 03/31/2007 | AMERICAN TECHNOLOGY CORP | ATCO | 599,644 | 561,644 | 2,386,000 | 2,145,000 | $3.98 |
| 12/31/2006 | AMERICAN TECHNOLOGY CORP | ATCO | 564,168 | 526,168 | 2,211,000 | 1,970,000 | $3.92 |
| 09/30/2006 | AMERICAN TECHNOLOGY CORP | ATCO | 566,480 | 528,480 | 2,163,000 | 1,922,000 | $3.82 |
| 06/30/2006 | AMERICAN TECHNOLOGY CORP | ATCO | 524,565 | 486,565 | 1,399,000 | 1,158,000 | $2.67 |
| 03/31/2006 | AMERICAN TECHNOLOGY CORP | ATCO | 544,941 | 506,941 | 2,276,000 | 2,035,000 | $4.18 |
| 12/31/2005 | AMERICAN TECHNOLOGY CORP | ATCO | 529,784 | 491,784 | 1,753,000 | 1,512,000 | $3.31 |
| 09/30/2005 | AMERICAN TECHNOLOGY CORP | ATCO | 497,699 | 459,699 | 2,537,000 | 2,296,000 | $5.10 |
| 06/30/2005 | AMERICAN TECHNOLOGY CORP | ATCO | 499,035 | 461,035 | 2,869,000 | 2,628,000 | $5.75 |
| 03/31/2005 | AMERICAN TECHNOLOGY CORP | ATCO | 446,435 | 408,435 | 3,625,000 | 3,384,000 | $8.12 |
| 12/31/2004 | AMERICAN TECHNOLOGY CORP | ATCO | 462,996 | 462,996 | 5,116,000 | 5,116,000 | $11.05 |
| 09/30/2004 | AMERICAN TECHNOLOGY CORP | ATCO | 382,085 | 344,085 | 2,196,000 | 1,955,000 | $5.75 |
| 06/30/2004 | AMERICAN TECHNOLOGY CORP | ATCO | 0 | -452,014 | 0 | -2,721,000 | |
| 03/31/2004 | AMERICAN TECHNOLOGY CORP | ATCO | 452,014 | 414,014 | 2,721,000 | 2,480,000 | $6.02 |
| 12/31/2003 | AMERICAN TECHNOLOGY CORP | ATCO | 439,698 | 401,698 | 2,098,000 | 1,857,000 | $4.77 |
| 09/30/2003 | AMERICAN TECHNOLOGY CORP | ATCO | 334,480 | 296,480 | 2,023,000 | 1,782,000 | $6.05 |
| 06/30/2003 | AMERICAN TECHNOLOGY CORP | ATCO | 38,000 | -38,069 | 241,000 | -179,000 | $6.34 |
| 09/30/2000 | AMERICAN TECHNOLOGY CORP | ATCO | 76,069 | -10,900 | 420,000 | 29,000 | $5.52 |
| 06/30/2000 | AMERICAN TECHNOLOGY CORP | ATCO | 86,969 | 3,000 | 391,000 | -459,000 | $4.50 |
| 03/31/2000 | AMERICAN TECHNOLOGY CORP | ATCO | 83,969 | 14,700 | 850,000 | 432,218 | $10.12 |
| 12/31/1999 | AMERICAN TECHNOLOGY CORP | ATCO | 69,269 | 69,269 | 417,782 | 417,782 | $6.03 |
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