WHY: Rosen Law Firm, a global investor rights law firm, reminds purchasers of the securities of Braxia Scientific Corp. f/k/a Champignon Brands Inc. ("Champignon") (OTC: BRAXF), (OTC: SHRMF) between March 27, 2020 and February 17, 2021, inclusive (the "Class Period") of the important June 9, 2021 lead plaintiff deadline in the securities class action commenced by the firm.