X0407 4 2023-04-27 1 0001092662 CHEMBIO DIAGNOSTICS, INC. CEMI 0001877081 Perceptive Credit Advisors, LLC 51 ASTOR PLACE, 10TH FLOOR NEW YORK NY 10003 0 0 0 1 Former 10% Owner 0001224962 PERCEPTIVE ADVISORS LLC 51 ASTOR PLACE, 10TH FLOOR NEW YORK NY 10003 0 0 0 1 Former 10% Owner 0001164426 EDELMAN JOSEPH 51 ASTOR PLACE, 10TH FLOOR NEW YORK NY 10003 0 0 0 1 Former 10% Owner 0 Common Stock 2023-04-27 4 U 0 5162782 .45 D 0 I See Footnote The disposition of common stock reported herein in the tender offer and subsequent acquisition of the Issuer completed on April 27, 2023 pursuant to the Agreement and Plan of Merger, dated as of January 31, 2023 with Biosynex SA and Project Merci Merger Sub, Inc., may have been matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 1,344,846 of the shares purchased by the reporting persons between April 4, 2023 and April 25, 2023. The Reporting Persons have agreed to pay to the Issuer $302.20, representing the full amount of the profit realized in connection with the transactions, representing the sales proceeds net of transaction costs. The securities are directly held by Perceptive Credit Holdings II, L.P. (the "Credit Fund"). Perceptive Credit Opportunities GP, LLC is the general partner of the Credit Fund, and Perceptive Credit Advisors LLC ("Credit Advisor") serves as the investment manager of the Credit Fund and as a relying advisor under Perceptive Advisors LLC (the "Advisor"). Joseph Edelman is the managing member of Credit Advisor and the Advisor. The Credit Advisor, the Advisor, and Mr. Edelman disclaim, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of its or his indirect pecuniary interest therein, and this report shall not be deemed an admission that the Credit Advisor or Mr. Edelman is the beneficial owner of such securities for purposes of Section 16 or for any other purposes. /s/ Joseph Edelman - for Perceptive Credit Advisors LLC, By: Joseph Edelman, its managing member 2023-05-01 /s/ Joseph Edelman - for Perceptive Advisors LLC, By: Joseph Edelman, its managing member 2023-05-01 /s/ Joseph Edelman 2023-05-01