By November 2010 three museums in Finland had conducted provenance research. These are the Ateneum Art Museum, which chiefly collects Finnish art, the Sinebrychoff Museum which focuses on European Old Masters, and the National Museum of Finland which focuses on Finnish cultural history.
Ateneum Art Museum
"Acquisitions to the international collection have been sporadic and dependent on resources. Thus there are few works in the collections of the Ateneum Art Museum that have lacunae in their provenance." See the list here, as published on 29 November 2010 here.
Sinebrychoff Art Museum
"This museum has a much larger problem in terms of research because of the volume and scope of the collections. At this stage, works that have been acquired at auction over the past decades have been excluded from the list, since they have been publicly exhibited before the auctions." See the list here, as published on 29 November 2010 here.
The National Museum of Finland
"The works of old masters in the museum´s collections mainly come from three private collectors, K. E. A. Bergman (1868-1944), Eric Idestam (1900-1960) and Albert Enckell (1883-1964), through bequests. A random selection of archival material pertaining to the purchase of some of the works, kept by the collectors themselves, has been preserved. Station master K. E. A. Bergman collected silver, furniture, porcellain, etc. as well as art. Both Eric Idestam, Master of Laws, and engineer Albert Enckell were avid collectors with wide-ranging interests, collecting, as did K. E. A. Bergman, much else besides art. All bequeathed their collections to the National Museum, inclusive of the old master paintings they had acquired in Europe (e.g. in London), and through art dealers in Helsinki."
The site lists a owing selection of their collections includes all those paintings that are known to have been acquired in Europe, or that have no known provenance.