MUELLER MICHAEL G 4

4 · AMEREN CORP · Filed Jan 20, 2011

Form 4

Period: 2011-01-18

Other

Transactions

Exercise/Conversion
Performance Units
2011-01-18−1,058→ 1,037 total
Exp: 2010-12-31→ Common Stock (1,058 underlying)
Tax Payment
Common Stock, $.01 Par Value
2011-01-18$28.19/sh−388$10,938→ 8,746 total
Exercise/Conversion
Common Stock, $.01 Par Value
2011-01-18+670→ 9,416 total

Holdings

Footnotes (9)

[F1]Amount includes a total of 211 shares acquired monthly from January through December 2010 at prices ranging from $24.00 to $29.60 per share.
[F2]Amount includes a total of 7 shares acquired during the first through fourth quarters of 2010 through reinvested dividends at prices ranging from $24.00 to $28.45 per share.
[F3]Amount includes a total of 3 shares acquired during the first through fourth quarters of 2010 through reinvested dividends at prices ranging from $24.00 to $28.45 per share.
[F4]Amount includes a total of 4 shares acquired during the first through fourth quarters of 2010 through reinvested dividends at prices ranging from $24.00 to $28.45 per share.
[F5]Amount includes a total of 3 shares acquired during the first through fourth quarters of 2010 through reinvested dividends at prices ranging from $24.00 to $28.45 per share.
[F6]Amount includes a total of 480 shares acquired during the first through fourth quarters of 2010 through reinvested dividends at prices ranging from $24.00 to $28.45 per share.
[F7]Sold to cover Mr. Mueller's tax liability for acquiring performance shares that have vested.
[F8]Each performance unit represents a contingent right to receive one share of Ameren common stock. The performance units vest after a two year holding period.
[F9]Amount adjusted for an understated amount of 67 units which had been inaccurately reported on previous filings.

Documents

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