DIAGNOS INC.June 7, 2021 Mr. Andrew J. Kriegler President & CEO IIROC (Investment Industry Regulatory Organization of Canada) 121 King St. West, Suite 2000 Toronto, Ontario M5H 3T9 Mr. Kriegler, On June 4, 2021, your organization has proceeded to a securities trading halt of Diagnos Inc., a TSX-Venture listed company (TSX - ADK) at the request of the company pending news, as stated in the news release below. Diagnos' President and CEO, Mr. Andr Larente has informed me at 10:35 p.m on June 6, 2021 that the said trading halt was initiated by IIROC, therefore IIROC and Diagnos Inc. are in contradiction about who enforced the said trading halt. I would appreciate that you get back to me as to what happened in this matter. Yours truly, Luc Proulx Diagnos Inc. shareholder --- DIAGNOS : IIROC Trading Halt - ADK VANCOUVER, BC, June 4, 2021 /CNW/ - The following issues have been halted by IIROC: Company: Diagnos Inc. TSX-Venture Symbol: ADK All Issues: Yes Reason: At the Request of the Company Pending News Halt Time (ET): 11:12 AM IIROC can make a decision to impose a temporary suspension (halt) of trading in a security of a publicly-listed company. Trading halts are implemented to ensure a fair and orderly market. IIROC is the national self-regulatory organization which oversees all investment dealers and trading activity on debt and equity marketplaces in Canada. SOURCE Investment Industry Regulatory Organization of Canada (IIROC) - Halts/Resumptions Canada Newswire, source Canada Newswire English