Sienna Senior Living Inc. is a Canadian publicly traded senior housing company based in Markham, Ontario.

As at 31 December 2019, the company owned and operated 70 seniors’ living residences in addition to managing 13 residences for third parties; all were located either in Ontario or B.C.

In Ontario, Sienna was the largest long-term care operator. The company is listed on the Toronto Stock Exchange.

Traded as:           TSX: SIA; S&P/TSX Composite Component

Industry:              Seniors’ housing

Founded:             1972

Headquarters:    Markham, Ontario, Canada

Website:              www.siennaliving.ca