The AES Corporation (NYSE: AES) and Alberta Investment Management Corporation(AIMCo), on behalf of certain of its clients, have agreed to acquire FTP Power LLC (sPower), the largest independent owner, operator and developer of utility scale solar assets in the United States, from Fir Tree Partners and its minority owners, for $853 million in cash, plus the assumption of $724 million in non-recourse debt. In connection with the transaction, AES and AIMCo will each directly and independently purchase and own slightly below 50% equity interests in sPower.