FORTUNE -- Yuri Milner's top dealmaker has quit to launch his own firm, Fortune has learned.
Alexander Tamas originally joined Milner's Digital Sky Technologies in 2008, after having previously worked as an investment banker at Goldman Sachs (GS). His primary responsibility was international expansion, including DST's investments in such companies as Alibaba, Airbnb, Facebook (FB), Groupon (GRPN), Spotify and Twitter.
Tamas also worked on the build-up and $7 billion IPO of Mail.Ru Group, where he also sat on the board of directors.
Next up will be a new firm called Vy Capital, named for an aviation term that refers to the best speed of climb. His partner will be Mateusz Szeszkowski, a former Goldman Sachs colleague who has spent the past five years in the London office of Kohlberg Kravis Roberts & Co. (KKR). Szeszkowski most recently was running KKR's European technology and Central and Eastern European investment groups. A KKR spokeswoman confirmed his departure, but did not yet have information on his successor in either post.
[UPDATE: KKR says European tech private equity is being led by partner
Henrik Kraft, while partner
Philipp Freise is handling the European media sector.]
No word yet on what types of investments Vy Capital plans to make, although they almost certainly will focus on the technology sector.
Fortune has reached out to both Tamas and Szeszkowski, and will update this post if either one of them responds.
Update: Tamas has sent over the following statement: "It has been a great privilege for me to work with Yuri and the DST team in helping to build the company over the past years. I am sure DST will continue to do be very successful. I am looking forward to staying a friend of the firm."
He also passed along a comment from Yuri Milner: "We are grateful for Alexander's contribution over the last few years. He has been a terrific colleague and good friend and I wish him the very best in his new endeavours."
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