ALERT: Rowley Law PLLC is Investigating Proposed Acquisition of Onvia Share this article NEW YORK, Oct. 6, 2017 /PRNewswire/ — Rowley Law PLLC is investigating potential claims against Onvia (NASDAQ: ONVI) and its board of directors for breach of fiduciary duty concerning the proposed acquisition of the company by Deltek for $9.00 per share in cash. The transaction is valued at approximately …