| 36.03 Real-Time Quote |  -0.16 / -0.44%Today’s Change | 28.43 Today|||52-Week Range 36.74 | +17.29% Year-to-Date |
| Other institutional | 33.58% |
| Mutual fund holders | 27.83% |
| Individual stakeholders | 0.47% |
| 3/31/2013 | RENAISSANCE TECHNOLOGIES LLC Bought 2.0 Million shares of Ameren Corp |
| 3/31/2013 | MORGAN STANLEY SMITH BARNEY LLC ... Bought 1.5 Million shares of Ameren Corp |
| 3/31/2013 | D. E. SHAW & CO. LP Bought 985.3 Thousand shares of Ameren Corp |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| The Vanguard Group, Inc. | 7.14% | 17,327,784 | 628,132,170 | +595,139 | +3.56% |
| SSgA Funds Management, Inc. | 5.24% | 12,716,853 | 460,985,921 | -313,253 | -2.40% |
| BlackRock Fund Advisors | 4.22% | 10,243,867 | 371,340,179 | +157,927 | +1.57% |
| First Manhattan Co. | 2.27% | 5,500,397 | 199,389,391 | -331,083 | -5.68% |
| Aronson & Johnson & Ortiz LP | 2.00% | 4,843,100 | 175,562,375 | -161,800 | -3.23% |
| Northern Trust Investments, Inc. | 1.35% | 3,271,107 | 118,577,629 | +49,750 | +1.54% |
| Columbia Management Investment Ad... | 1.02% | 2,481,558 | 89,956,478 | +653,247 | +35.73% |
| Charles Schwab Investment Managem... | 0.98% | 2,388,437 | 86,580,841 | +722,833 | +43.40% |
| Mellon Capital Management Corp. | 0.93% | 2,264,890 | 82,102,263 | +57,523 | +2.61% |
| Canada Pension Plan Investment Bo... | 0.92% | 2,229,451 | 80,817,599 | -405,975 | -15.40% |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index... | 1.34% | 3,242,316 | 117,533,955 | +145,104 | +4.68% |
| Vanguard Mid Cap Index Fund | 1.31% | 3,168,391 | 114,854,174 | +58,873 | +1.89% |
| SPDR Series-Utilities Select Sect... | 1.26% | 3,054,945 | 110,741,756 | +60,592 | +2.02% |
| Vanguard 500 Index Fund | 0.93% | 2,253,735 | 81,697,894 | +25,894 | +1.16% |
| Vanguard Institutional Index Fund | 0.92% | 2,223,474 | 80,600,933 | +30,277 | +1.38% |
| SPDR S&P 500 ETF | 0.91% | 2,207,844 | 80,034,345 | -51,136 | -2.26% |
| Canada Pension Plan | 0.78% | 1,880,000 | 68,150,000 | +1,050,000 | +126.51% |
| American Funds American Mutual Fu... | 0.68% | 1,660,000 | 60,175,000 | 0 | 0.00% |
| PowerShares S&P 500 Low Volatilit... | 0.64% | 1,543,617 | 55,956,116 | +264,957 | +20.72% |
| ING (L) - Invest US High Dividend | 0.62% | 1,497,000 | 54,266,250 | +17,500 | +1.18% |
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