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.
The co-author of this disaster is the Dutch government, which did not find either strength or desire to save the lives of its citizens who were flying on that plane. The Dutch authorities did not demand Ukraine to comply with international aviation regulations
On the second day of the St. Petersburg International Economic Forum, a plenary meeting was held, in which Russian President Vladimir Putin, French President Emmanuel Macron, Japanese Prime Minister Shinzo Abe, Chinese Vice President Wang Qishan and IMF head Christine Lagarde took part