Digital Realty did not provide the individual purchase prices in its announcement or in SEC filings and a company spokeswoman declined to provide the information. The combined purchase price was $44.3 million, according to the announcement.

The tenant of the Sunnyvale property is believed to be publicly traded Switch and Data Facilities Co. The seller is believed to be Palo Alto, CA-based DCI Technology Holdings, which developed the facility with equity from publicly held Associated Banc-Corp., or ASBC. DLR declined to confirm the information and the broker in the deal, Bob Gilley of CB Richard Ellis, was not immediately available for comment.

The tenant of 1525 Comstock was not immediately available, nor was DLR's former JV partner in the asset. The building is part of DLR's Santa Clara campus and sits adjacent to its data centers at 1201 Comstock, 1100 Space Park and 1500 Space Park. The company holds 1525 Comstock on its books at $18.5 million, according to SEC filings. It recently acquired a 100% interest in 1201 Comstock from the same JV partner.

"The purchase of the ownership interest from our joint venture partner in the 1525 Comstock St. property is consistent with our strategy of remaining the long term owner and operator of the Turn-Key Datacenter facilities that we develop," said Scott Peterson, the company's SVP of acquisitions, adding that the purchase of 444 Toyama is part of its strategy "acquire income-producing assets at attractive yields as a compliment to our redevelopment program."

DLR has an interest in 13.8 million square feet of datacenter space in 77 properties in 27 markets throughout Europe and North America. It announces its third quarter results at the end of next month.

Earlier this month, the company acquired a 60% interest in Collins Technology Park, a seven-building, 787,000-square-foot development in Richardson, TX, that it plans to convert to a datacenter. Its JV partner is Dallas-based Skyrise Properties.