| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2013-02-14 | PIPER JAFFRAY COMPANIES | KAISER ALUMINUM CORP | 2,126,383 | 11.0% | EDGAR |
| SC 13G | 2013-02-13 | VANGUARD GROUP INC | KAISER ALUMINUM CORP | 1,039,707 | 5.4% | EDGAR |
| SC 13G/A | 2013-02-11 | DIMENSIONAL FUND ADVISORS LP | KAISER ALUMINUM CORP | 1,622,092 | 8.4% | EDGAR |
| SC 13G/A | 2013-02-08 | BlackRock Inc. | KAISER ALUMINUM CORP | 1,485,442 | 7.7% | EDGAR |
| SC 13G/A | 2013-02-07 | HEARTLAND ADVISORS INC | KAISER ALUMINUM CORP | 982,129 | 5.1% | EDGAR |
| SC 13G/A | 2012-06-08 | VEBA for Retirees of Kaiser Aluminum | KAISER ALUMINUM CORP | 881,010 | 4.6% | EDGAR |
| SC 13G/A | 2012-02-14 | DIMENSIONAL FUND ADVISORS LP | KAISER ALUMINUM CORP | 1,549,308 | 8.0% | EDGAR |
| SC 13G | 2012-02-14 | PIPER JAFFRAY COMPANIES | KAISER ALUMINUM CORP | 2,801,696 | 14.5% | EDGAR |
| SC 13G/A | 2012-02-13 | BlackRock Inc. | KAISER ALUMINUM CORP | 1,429,325 | 7.3% | EDGAR |
| SC 13G/A | 2012-02-10 | HEARTLAND ADVISORS INC | KAISER ALUMINUM CORP | 1,106,400 | 5.7% | EDGAR |
| SC 13G/A | 2012-02-10 | Independent Fiduciary Services Inc. | KAISER ALUMINUM CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2012-02-10 | VEBA for Retirees of Kaiser Aluminum | KAISER ALUMINUM CORP | 2,202,495 | 11.4% | EDGAR |
| SC 13G/A | 2012-02-07 | KEELEY ASSET MANAGEMENT CORP | KAISER ALUMINUM CORP | 842,715 | 4.4% | EDGAR |
| SC 13G/A | 2011-05-09 | VEBA for Retirees of Kaiser Aluminum | KAISER ALUMINUM CORP | 2,520,080 | 13.1% | EDGAR |
| SC 13G/A | 2011-02-14 | GOLDMAN SACHS ASSET MANAGEMENT LP | KAISER ALUMINUM CORP | 874,543 | 4.6% | EDGAR |
| SC 13G/A | 2011-02-11 | DIMENSIONAL FUND ADVISORS LP | KAISER ALUMINUM CORP | 1,398,255 | 7.3% | EDGAR |
| SC 13G | 2011-02-10 | PIPER JAFFRAY COMPANIES | KAISER ALUMINUM CORP | 2,690,821 | 14.0% | EDGAR |
| SC 13G/A | 2011-02-07 | KEELEY ASSET MANAGEMENT CORP | KAISER ALUMINUM CORP | 1,202,005 | 6.3% | EDGAR |
| SC 13G | 2011-02-07 | BlackRock Inc. | KAISER ALUMINUM CORP | 1,199,640 | 6.2% | EDGAR |
| SC 13G | 2010-07-12 | PIPER JAFFRAY COMPANIES | KAISER ALUMINUM CORP | 2,030,029 | 10.6% | EDGAR |