Harbor Acquisition Corp. (SEC CIK 0001331945) is a blank check special purpose acquisition company formed during the mid-2000s wave of SPAC formation activity. An SC 13G/A beneficial ownership amendment, filed with the SEC on January 21, 2009, reflects an institutional investor's updated equity stake disclosure in the vehicle, consistent with passive-investor reporting obligations under Section 13(g) of the Securities Exchange Act. The filing suggests the company remained an active registered entity through the late stage of its search period. Sponsor details are not confirmed in the available filing record. Harbor Acquisition Corp. operated as a sector-agnostic blank check vehicle typical of its vintage. Sign up at SpacDesk for full institutional ownership history, sponsor profiles, and deal-status timelines on this and hundreds of other SPAC filings.