The company was still calculating the exact percentage of shares that voted, spokeswoman Kathy Shepard said.
Under terms of the buyout, Blackstone will pay Hilton shareholders $47.50 per share in cash. Including assumed debt, the total deal is valued at $26 billion (18.75 billion EUR).
Shares of Hilton Hotels rose 14 cents to $46.12 during afternoon trading. Blackstone Group shares rose 23 cents to $23.88.
The transaction must still pass regulatory approval.
Beverly Hills-based Hilton Hotels operates more than 2,800 hotels around the world. The company generated $8.11 billion (5.85 billion EUR) in revenue last year.
Russian Finance Minister Anton Siluanov announced a possible move that Russia can take in response to new US sanctions
When the bill was submitted to Congress on August 2, the reason for imposing the new sanctions on Russia was based on Russia's alleged interference in the US presidential election in 2016, but then something clicked
The Central Bank of Turkey announced measures to protect the financial market of Turkey against the background of the collapse of the Turkish lira and conflict of interests with the United States of America