This news release constitutes a “designated news release” for the purposes of Sienna’s amended and restated prospectus supplement dated November 14, 2025 to its short form base shelf prospectus dated November 29, 2024. MARKHAM, Ontario, Dec. 19, 2025 (GLOBE NEWSWIRE) -- Sienna Senior Living Inc. ("Sienna" or the "Company") (TSX: SIA) announced today that it has completed its previously disclosed acquisition of a 78.2% interest in LaSalle Park located in Burlington, Ontario, a suburb within the Greater Toron ...