Open Ukraine - Arseniy Yatsenyuk Foundation

Fond Viktora Pinchuka http://pinchukfund.org/ua/
Black Sea Trust for Regional Cooperation http://www.gmfus.org/ (The German Marshall Fund of the United States)
Chatham House http://www.chathamhouse.org/ (based in London)
International Renaissance Foundation http://www.opensocietyfoundations.org/about/offices-foundations/international-renaissance-foundation (founded by George Soros)
NATO Documentation and Information Centre http://www.nato.int/cps/uk/SID-09B9C0F7-C4C588D4/natolive/index.htm
Embassy of the United States in Ukraine http://ukrainian.ukraine.usembassy.gov/
Embassy of Poland http://kijow.msz.gov.pl/
NED National Endowment for Democracy http://www.ned.org/ (run by United States Department of State / U.S. Congress)
Horizon Capital http://www.horizoncapital.com.ua/
Swedbank http://www.swedbank.ua/ (Please note that Swedbank has discontinued its operations in Ukraine and sold the Ukrainian subsidiary to Mr. Mykola Lagun, the majority owner in Delta Bank.)

Note: Arseniy Yatsenyuk is called Prime Minister of Ukraine by some people since 2014-02-27.