Exhibit 4 Form of Common Stock Certificate of Humitech International, Inc. FORM OF STOCK CERTIFICATE NUMBER SHARES - --------------------- ------------------ 1554 - --------------------- ------------------ HUMITECH HUMITECH, INC. INCORPORATED UNDER THE LAWS OF THE STATE OF NEVADA PAR VALUE $0.001 A COMMON STOCK THIS CERTIFIES THAT VOID is the owner of FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK PAR VALUE OF $0.001 EACH OF HUMITECH, INC. transferable on the books of the Corporation in person or by duly authorized attorney upon surrender of this Certificate properly endorsed. This Certificate is not valid until countersigned by the Transfer Agent and registered by the Registrar. Witness the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers. DATED: /s/ C. J. Comu Countersigned and Registered: - -------------------------------- CHAIRMAN & CEO SIGNATURE STOCK TRANSFER, INC. (Addison, Texas) Transfer Agent BY Authorized Signature HUMITECH, INC. CORPORATE SEAL NEVADA