PALO ALTO, Calif. — Greater Bay Bancorp said Monday it completed its acquisition of Bank of Petaluma.

Bank of Petaluma will operate as a subsidiary of Greater Bay. Including a pending merger with Matsco Cos. Inc., the company’s pro forma assets as of Sept. 30 would have been about $4.7 billion.

“The addition of Bank of Petaluma enhances Greater Bay’s ‘ring the Bay’ strategy by providing a solid market presence from San Francisco up through Marin County and into Petaluma, a region also known as Telecom Valley,” David Kalkbrenner, president and chief executive officer of Greater Bay Bancorp, said in a press statement.

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