AMEREN CORP — Director's Dealing 2012

Jan 19, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMEREN CORP (AEE)
CIK: 0001002910
Period of Report: 2012-01-17

Reporting Person: Borkowski Maureen A (President & CEO of Subsidiary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-01-17	Common Stock, $.01 Par Value	F	321	$28.89	Disposed	1997	Direct
2012-01-17	Common Stock, $.01 Par Value	M	555	—	Acquired	2552	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-01-17	Performance Units	$	M	876	Disposed	2011-12-31	Common Stock (876)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock, $.01 Par Value	1514	Indirect
Common Stock, $.01 Par Value	1273	Indirect
Common Stock, $.01 Par Value	297	Indirect

Footnotes

F1: Amount includes a total of 183 shares acquired monthly from January through December 2011 at prices ranging from $26.91 to $33.41 per share.

F2: Amount includes a total of 63 shares acquired during the first through fourth quarters of 2011 through reinvested dividends at prices ranging from $28.21 to $33.41 per share.

F3: Amount includes a total of 16 shares acquired during the first through fourth quarters of 2011 through reinvested dividends at prices ranging from $28.21 to $33.41 per share.

F4: Sold to cover Mrs. Borkowski's tax liability for acquiring performance shares that have vested.

F5: Amount includes a total of 90 shares acquired during the first through fourth quarters of 2011 through reinvested dividends at prices ranging from $28.21 to $33.41 per share.

F6: 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.