The Podesta brothers are central figured in Pizzagate. This investigation involved lobbying in Ukraine without being registered.

Prosecutors elected not to bring any charges.

Summary and story:

Podesta is the chairman of the Podesta Group and the brother of John Podesta, who was Hillary Clinton's presidential campaign chairman. John Podesta has not been affiliated with the Podesta Group since the 1990s and was not a subject of the investigation.

Both firms were being investigated for possibly failing to file Foreign Agents Registration Act reports for their work with the ECMU and on behalf of Ukraine, NBC News has previously reported.

According to an October 2017 indictment, the two lobbying firms were paid $2 million from offshore accounts controlled by Manafort for their work on the campaign.

https://www.nbcnews.com/politics/justice-department/justice-department-ends-investigation-tony-podesta-vin-weber-without-charges-n1058306