Ameren Corp. and its subsidiaries reported in a Securities and Exchange Commission filing that exposure to the Lehman Bros. bankruptcy filing on Monday is minimal:

• St. Louis-based Ameren says several units are counterparties with Lehman subsidiaries in energy commodity transactions. Ameren’s direct exposure based on contracts and current market prices is less than $1 million, before taxes;
• Ameren and subsidiaries have $2.15 billion of credit with a group of banks, including Lehman. Lehman’s share of the commitments under the credit facility was $171 million. On Wednesday, Ameren agreed to a request by Lehman to assign $50 million of borrowings to Commerzbank AG;
• Exclusing $121 million of borrowing capacity assigned to Lehman, Ameren had $1.2 billion of available liquidity as of Thursday, the filing said.