Sergei Kolesnikov (whistleblower)

Sergei Kolesnikov (born 1955, died 2013) was a Russian biochemist and whistleblower known for publicly alleging corruption and misuse of funds related to large-scale state-sponsored healthcare projects under the government of Vladimir Putin.

Kolesnikov, a long-time associate of Putin confidante Nikolai Shamalov, co-founded several medical supply companies that benefitted significantly from government contracts. In 2010, he wrote an open letter to then-President Dmitry Medvedev detailing his concerns about the alleged diversion of billions of rubles earmarked for modernizing the Russian healthcare system. Specifically, he claimed that a significant portion of the funds were being used to build a lavish palace on the Black Sea for Putin's personal use, rather than for their intended purpose.

The open letter and the subsequent media attention brought the alleged corruption to international attention. Kolesnikov's claims formed a key element in the documentary Putin's Palace: History of World's Largest Bribe, which further elaborated on the alleged construction and funding of the opulent Black Sea residence.

Kolesnikov’s allegations sparked controversy and denials from the Kremlin. He faced significant personal and professional repercussions following his revelations, including alleged threats and harassment. He eventually left Russia and lived in exile until his death in Estonia in 2013 from a heart attack. His role as a whistleblower continues to be cited as an example of the risks faced by individuals who expose corruption within the Russian government.