AMEREN CORP — Director's Dealing 2012

Feb 29, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMEREN CORP (AEE)
CIK: 0001002910
Period of Report: 2012-02-28

Reporting Person: BAXTER WARNER L (Chmn, Pres. & CEO of Sub)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-28	Common Stock, $.01 Par Value	F	4643	$31.97	Disposed	27597	Direct
2012-02-28	Common Stock, $.01 Par Value	M	6295	—	Acquired	33892	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock, $.01 Par Value	9563	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Performance Units	$		Common Stock (8047)	8047	Direct

Footnotes

F1: Sold to cover Mr. Baxter's tax liability for acquiring performance shares that have vested.

F2: 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.