The Cannabist Company Holdings Inc. (Cboe CA: CBST) (OTCQB: CBSTF) (“The Cannabist Company” or the “Company”), one of the largest and most experienced cultivators, manufacturers and retailers of cannabis products in the U.S., announced today that Michael Abbott resigned as a director of the Board of Directors (the “Board”) of the Company, effective October 3, 2025, in order to pursue other personal and professional commitments. Abbott co-founded the Company as Columbia Care in 2012 and served as Executive Chairman of the Board until 2023, and, since then, as Chair of the Board. David Hart, Chief Executive Officer and Director, commented, “On behalf of the Board and the management team, I thank Michael for his innumerable contributions to the Company since its founding and for his unwavering support of the Company across the years. We wish him all the best with future endeavors.”

About The Cannabist Company (f/k/a Columbia Care)

The Cannabist Company, formerly known as Columbia Care, is one of the most experienced cultivators, manufacturers and providers of cannabis products and related services, with licenses in 12 U.S. jurisdictions. The Company operates 77 facilities including 61 dispensaries and 16 cultivation and manufacturing facilities, including those under development. Columbia Care, now The Cannabist Company, is one of the original multi-state providers of cannabis in the U.S. and now delivers industry-leading products and services to both the medical and adult-use markets. In 2021, the Company launched Cannabist, its retail brand, creating a national dispensary network that leverages proprietary technology platforms. The company offers products spanning flower, edibles, oils and tablets, and manufactures popular brands including dreamt, Seed & Strain, Triple Seven, Hedy, gLeaf, Classix, Press, and Amber. For more information, please visit www.cannabistcompany.com.

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