Question with options: can we draw the following hypothesis from the context?

Context:

Sotheby's and Christie's, the world's two most powerful auction houses, swapped confidential lists of super-rich clients who were spared from paying fees charged to other sellers, people close to the companies and to a federal antitrust investigation of them said.

Hypothesis: Christie's is one of the world's largest auction houses.
Choose from: --yes. --no.
A:
yes