X0306 4 2022-01-05 0001092662 CHEMBIO DIAGNOSTICS, INC. CEMI 0001902795 Steenvoorden Lawrence J. C/O CHEMBIO DIAGNOSTICS, INC. 555 WIRELESS BOULEVARD HAUPPAUGE NY 11788 true See remarks Restricted stock units 2022-01-05 4 A 0 160714 0 A Common stock 160714 160714 D Nonqualified stock options 1.12 2022-01-05 4 A 0 300000 0 A 2029-01-05 Common stock 300000 300000 D Each restricted stock unit represents a contingent right to receive one share of Common Stock The restricted stock units are scheduled to vest in three equal installments on January 5, 2023, 2024 and 2025, provided they shall vest in full immediately prior to (a) the issuer's termination of the reporting person employment without Cause, the reporting person's termination of his employment for Good Reason or the expiration of the Term upon notice of nonrenewal delivered by the Company, in each case within twelve months following a Change in Control, or (b) the reporting person's death or Permanent Disability (each such capitalized term as defined in the employment agreement between the issuer and the reporting person). The nonqualified stock options are scheduled to vest in four equal installments on January 5, 2023, 2024, 2025 and 2026, provided they shall vest in full immediately prior to (a) the issuer's termination of the reporting person's employment without Cause, the reporting person's termination of his employment for Good Reason or the expiration of the Term upon notice of nonrenewal delivered by the Company, in each case within twelve months following a Change in Control, or (b) the reporting person's death or Permanent Disability (each such capitalized term as defined in the employment agreement between the issuer and the reporting person). Executive Vice President and Chief Financial Officer /s/ Mark L. Johnson, Attorney-in-Fact for Lawrence J. Steenvoorden 2022-01-06