On Wikipedia https://en.wikipedia.org/wiki/Bolshoi_Theatre#Orchestra
Alternative Spellings Bolshoi Theatre Orchestra, Bolshoi Symphony Orchestra, Bolshoi Theatre State Academic Orchestra
Creation 1780, December 30th
Participants Yevgeny Svetlanov - Conductor from 1963 to 1965
Gennady Rozhdestvensky (Gennady Nikolayevich Anosov) - Conductor from 1965 to 1970
Yuri Simonov - Conductor from 1970 to 1985
Gennady Rozhdestvensky (Gennady Nikolayevich Anosov) - Conductor from 2000 to 2001
Alexander Vedernikov - Conductor from 2001 to 2009
Vassily Sinaisky - Conductor from 2010 to 2013
Tugan Sokhiev - Conductor from 2014-01-20
City Moscow, Russia
Country Russian Federation

The Bolshoi Theater Orchestra has a long and distinguished history dating back to its origins in 1776 as an ensemble of 13 musicians who accompanied singers in the first permanent theatrical troupe in Moscow. The orchestra has taken part in the premieres of numerous ballets and operas that would later form the Russian canon, including those of Tchaikovsky, Mussorgsky, Rimsky-Korsakov, Prokofiev, and Shostakovich. The Bolshoi Theater Orchestra is now made up of some 200 players, most of whom trained at the Bolshoi Musical Academy. In addition to regular work in Moscow, the orchestra has performed in Japan, England, the United States, and Europe. The first-desk players of each section of the orchestra perform in the chamber group Ensemble of the Soloists of the Bolshoi Theater Orchestra. Allmusic