Steve Ballmer took over Microsoft.

Steve Ballmer took over Microsoft:

"I have four words for you:

I LOVE THIS COMPANY!"

TAKE OVER (GET CONTROL)
To assume the control or management of or the responsibility for.
To get control of a company by buying most of its shares.

She took over the job after he left.

The first officer took over the ship when the captain suffered a heart attack.

Bill Gates retired and Steve Ballmer took over Microsoft.

The company he works for has recently been taken over.

He took over from the previous superintendent in February.

She took over as manager two weeks ago.