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The California Public Utilities Commission voted unanimously Thursday to approve the deal, the last regulatory barrier before closing

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The California Public Utilities Commission voted unanimously Thursday to approve Charter Communications' $21.9 billion acquisition of Cox Communications, clearing the final regulatory hurdle before the deal closes.

California was the last state to grant approval, according to the Wall Street Journal. The other 44 states where the companies operate had already signed off, and the Federal Communications Commission approved the deal in February. Charter and Cox expect the transaction to close later this month, at which point the combined company will operate under the Cox Communications name within a year.