| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2011-01-10 | BlackRock Inc. | LAM RESEARCH CORP | 12,875,408 | 10.5% | EDGAR |
| SC 13G/A | 2010-05-10 | WELLINGTON MANAGEMENT CO LLP | LAM RESEARCH CORP | 4,285,050 | 3.4% | EDGAR |
| SC 13G/A | 2010-04-09 | BlackRock Inc. | LAM RESEARCH CORP | 13,179,211 | 10.3% | EDGAR |
| SC 13G/A | 2010-02-16 | FMR LLC | LAM RESEARCH CORP | 19,091,898 | 15.0% | EDGAR |
| SC 13G/A | 2010-02-12 | WELLINGTON MANAGEMENT CO LLP | LAM RESEARCH CORP | 11,662,730 | 9.2% | EDGAR |
| SC 13G/A | 2010-02-09 | TURNER INVESTMENT PARTNERS INC | LAM RESEARCH CORP | 6,225,249 | 4.9% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | LAM RESEARCH CORP | 11,294,390 | 8.9% | EDGAR |
| SC 13G/A | 2009-02-17 | FMR LLC | LAM RESEARCH CORP | 18,743,614 | 15.0% | EDGAR |
| SC 13G/A | 2009-02-17 | WELLINGTON MANAGEMENT CO LLP | LAM RESEARCH CORP | 13,082,355 | 10.5% | EDGAR |
| SC 13G/A | 2009-02-13 | AXA FINANCIAL INC | LAM RESEARCH CORP | 645,640 | 0.5% | EDGAR |
| SC 13G/A | 2009-02-12 | CAPITAL GUARDIAN TRUST CO | LAM RESEARCH CORP | 1,497,300 | 1.2% | EDGAR |
| SC 13G | 2009-02-12 | TURNER INVESTMENT PARTNERS INC | LAM RESEARCH CORP | 7,616,874 | 6.1% | EDGAR |
| SC 13G | 2008-05-12 | FMR LLC | LAM RESEARCH CORP | 17,235,566 | 13.8% | EDGAR |
| SC 13G/A | 2008-02-14 | FMR LLC | LAM RESEARCH CORP | 5,942,755 | 4.8% | EDGAR |
| SC 13G/A | 2008-02-14 | WELLINGTON MANAGEMENT CO LLP | LAM RESEARCH CORP | 13,631,400 | 10.1% | EDGAR |
| SC 13G | 2008-02-14 | AXA FINANCIAL INC | LAM RESEARCH CORP | 9,188,800 | 7.4% | EDGAR |
| SC 13G | 2008-02-12 | CAPITAL GROUP INTERNATIONAL INC | LAM RESEARCH CORP | 6,917,820 | 5.1% | EDGAR |
| SC 13G/A | 2007-12-10 | BARCLAYS GLOBAL INVESTORS NA /CA/ | LAM RESEARCH CORP | 2,782,825 | 2.2% | EDGAR |
| SC 13G/A | 2007-04-10 | FMR CORP | LAM RESEARCH CORP | 7,644,437 | 5.4% | EDGAR |
| SC 13G/A | 2007-03-09 | BARCLAYS GLOBAL INVESTORS NA /CA/ | LAM RESEARCH CORP | 11,763,401 | 8.3% | EDGAR |