They were a theatre company. They put on plays.
Lord Chamberlains men
no there not sorry
Lord Chamberlains Men
They are more commonly remembered as the King's Men.
He joined the Lord Chamberlains men which later changed their name to the Kings Men.
The owners of the Globe theatre were all members of the Lord Chamberlain's Men, including Richard and Cuthbert Burbage and William Shakespeare.
The Lord Chamberlain's men changed their name because they gained the patronage of the reigning monarch King James I thus becoming The King's Men.
They were the acting company with which he was associated for nearly twenty years.
They did not. They were formed as the Lord Chamberlain's Men in 1594. Their name changed to the King's Men (they did not have any choice in their name) when the King became their patron nine years later in 1603.
There is no hard evidence to prove which companies Shakespeare worked with prior to helping to found The Lord Chamberlain's Men. The ususal suspects are Queen Elizabeth's Men, Pembroke's Men, Derby's Men, and Strange's Men, but that is just surmise.
The Lord Chamberlain's Men were the acting company which William Shakespeare belonged to. He performed with them, and his plays were the property of the company. The connection of the company with Shakespeare is what makes it significant.
Two of the most notable actors in Lord Chamberlain's men were Richard Burbage and Will Kempe. Some of the others were Will Shakespeare, of course, Augustine Phillips, Thomas Pope, John Heminges and Henry Condell. All actors During Shakespeare's time were men because it was illegal for women to act or step on the set of a play.