| SC 13G/A | 2011-02-14 | FMR LLC | AMERICAN ELECTRIC POWER CO INC | 15,517,850 | 3.2% | EDGAR |
| SC 13G/A | 2011-02-02 | BlackRock Inc. | AMERICAN ELECTRIC POWER CO INC | 27,881,137 | 5.8% | EDGAR |
| SC 13G | 2010-02-16 | FMR LLC | AMERICAN ELECTRIC POWER CO INC | 25,852,912 | 5.4% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | AMERICAN ELECTRIC POWER CO INC | 25,177,569 | 5.3% | EDGAR |
| SC 13G/A | 2009-02-03 | BARCLAYS GLOBAL INVESTORS NA /CA/ | AMERICAN ELECTRIC POWER CO INC | 8,902,090 | 2.2% | EDGAR |
| SC 13G | 2008-02-05 | BARCLAYS GLOBAL INVESTORS NA /CA/ | AMERICAN ELECTRIC POWER CO INC | 14,975,075 | 3.7% | EDGAR |
| SC 13G/A | 2007-02-13 | AXA FINANCIAL INC | AMERICAN ELECTRIC POWER CO INC | 8,732,183 | 2.2% | EDGAR |
| SC 13G | 2007-02-09 | BARROW HANLEY MEWHINNEY & STRAUSS INC | AMERICAN ELECTRIC POWER CO INC | 10 | 12.0% | EDGAR |
| SC 13G | 2007-01-23 | BARCLAYS GLOBAL INVESTORS NA /CA/ | AMERICAN ELECTRIC POWER CO INC | 14,584,970 | 3.7% | EDGAR |
| SC 13G/A | 2006-02-14 | AXA FINANCIAL INC | AMERICAN ELECTRIC POWER CO INC | 27,585,092 | 7.0% | EDGAR |
| SC 13G/A | 2006-02-10 | CAPITAL RESEARCH & MANAGEMENT CO | AMERICAN ELECTRIC POWER CO INC | 16,965,500 | 4.3% | EDGAR |
| SC 13G | 2006-02-07 | BARROW HANLEY MEWHINNEY & STRAUSS INC | AMERICAN ELECTRIC POWER CO INC | 24,562,886 | 6.2% | EDGAR |
| SC 13G/A | 2005-02-14 | AXA FINANCIAL INC | AMERICAN ELECTRIC POWER CO INC | 27,030,788 | 6.8% | EDGAR |
| SC 13G | 2005-02-08 | BARROW HANLEY MEWHINNEY & STRAUSS INC | AMERICAN ELECTRIC POWER CO INC | 21,389,077 | 5.4% | EDGAR |
| SC 13G/A | 2005-02-07 | CAPITAL RESEARCH & MANAGEMENT CO | AMERICAN ELECTRIC POWER CO INC | 35,674,180 | 9.0% | EDGAR |
| SC 13G/A | 2004-02-13 | CAPITAL RESEARCH & MANAGEMENT CO | AMERICAN ELECTRIC POWER CO INC | 37,398,880 | 9.4% | EDGAR |
| SC 13G | 2004-02-11 | BARROW HANLEY MEWHINNEY & STRAUSS INC | AMERICAN ELECTRIC POWER CO INC | 20,135,179 | 5.1% | EDGAR |
| SC 13G | 2004-02-10 | AXA FINANCIAL INC | AMERICAN ELECTRIC POWER CO INC | 34,514,732 | 8.7% | EDGAR |
| SC 13G/A | 2003-02-13 | CAPITAL RESEARCH & MANAGEMENT CO | AMERICAN ELECTRIC POWER CO INC | 27,963,000 | 8.3% | EDGAR |
| SC 13G/A | 2003-02-12 | AXA FINANCIAL INC | AMERICAN ELECTRIC POWER CO INC | 30,946,161 | 9.1% | EDGAR |