| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2013-02-14 | WELLINGTON MANAGEMENT CO LLP | ATWOOD OCEANICS INC | 4,917,987 | 7.5% | EDGAR |
| SC 13G/A | 2013-02-14 | COLUMBIA WANGER ASSET MANAGEMENT LLC | ATWOOD OCEANICS INC | 4,967,440 | 7.5% | EDGAR |
| SC 13G/A | 2013-02-06 | LONDON CO OF VIRGINIA | ATWOOD OCEANICS INC | 3,434,956 | 5.2% | EDGAR |
| SC 13G | 2012-10-10 | LONDON CO OF VIRGINIA | ATWOOD OCEANICS INC | 3,288,421 | 5.0% | EDGAR |
| SC 13G/A | 2012-03-12 | WELLINGTON MANAGEMENT CO LLP | ATWOOD OCEANICS INC | 6,849,762 | 10.5% | EDGAR |
| SC 13G | 2012-02-14 | WELLINGTON MANAGEMENT CO LLP | ATWOOD OCEANICS INC | 6,050,219 | 9.3% | EDGAR |
| SC 13G/A | 2012-02-13 | COLUMBIA WANGER ASSET MANAGEMENT LLC | ATWOOD OCEANICS INC | 5,028,028 | 7.7% | EDGAR |
| SC 13G/A | 2011-06-10 | BlackRock Inc. | ATWOOD OCEANICS INC | 3,225,817 | 5.0% | EDGAR |
| SC 13G/A | 2011-02-10 | COLUMBIA WANGER ASSET MANAGEMENT LLC | ATWOOD OCEANICS INC | 7,077,079 | 10.9% | EDGAR |
| SC 13G | 2011-02-02 | BlackRock Inc. | ATWOOD OCEANICS INC | 3,694,712 | 5.7% | EDGAR |
| SC 13G/A | 2010-11-10 | FMR LLC | ATWOOD OCEANICS INC | 1,356,774 | 2.1% | EDGAR |
| SC 13G/A | 2010-08-09 | BlackRock Inc. | ATWOOD OCEANICS INC | 3,038,036 | 4.7% | EDGAR |
| SC 13G/A | 2010-02-12 | WELLINGTON MANAGEMENT CO LLP | ATWOOD OCEANICS INC | 828,049 | 1.3% | EDGAR |
| SC 13G/A | 2010-02-09 | COLUMBIA WANGER ASSET MANAGEMENT LP | ATWOOD OCEANICS INC | 7,061,150 | 11.0% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | ATWOOD OCEANICS INC | 4,725,652 | 7.4% | EDGAR |
| SC 13G/A | 2010-01-11 | FMR LLC | ATWOOD OCEANICS INC | 4,647,025 | 7.2% | EDGAR |
| SC 13G/A | 2009-04-08 | COLUMBIA WANGER ASSET MANAGEMENT LP | ATWOOD OCEANICS INC | 6,499,700 | 10.1% | EDGAR |
| SC 13G/A | 2009-02-17 | FMR LLC | ATWOOD OCEANICS INC | 8,396,862 | 13.1% | EDGAR |
| SC 13G | 2009-02-17 | WELLINGTON MANAGEMENT CO LLP | ATWOOD OCEANICS INC | 4,139,810 | 6.5% | EDGAR |
| SC 13G/A | 2009-02-05 | COLUMBIA WANGER ASSET MANAGEMENT LP | ATWOOD OCEANICS INC | 6,134,200 | 9.6% | EDGAR |