**Exhibit2.1**

 

|  | Incorporated  under the Canada Business Corporations Act Constituée sous l’autorité de la  Loi canadienne sur les sociétés par actions HYDROG(E)NICS Advanced Hydrogen  Solutions ISIN: CA4488832078 CUSIP: 448883207 NUMBER/NUMÉRO GC3041799 This certifies  that SPECIMEN GC3041799 CA4488832078 OACTIONS ORDINAIRES ENTIÉREMENT LIBÉRÉES  DE FULLY PAID AND NON-ASSESSABLE COMMON SHARES OF HYDROGENICS CORPORATION  SPECIMEN GC3041799 CA4488832078 OACTIONS ORDINAIRES ENTIÉREMENT LIBÉRÉES DE  FULLY PAID AND NON-ASSESSABLE COMMON SHARES OF HYDROGENICS CORPORATION  SPECIMEN GC3041799 CA4488832078 OACTIONS ORDINAIRS ENTIÉREMENT LIBÉRÉES DE  FULLY PAID IN NON-ASSESSABLE COMMON SHARES OF HYDROGENICS CORPORATION  SPECIMEN GC3041799 CA4488832078 OACTIONS ORDINAIRES ENTIÉREMENT LIBÉRÉES DE  FULLY PAID AND NON-ASSESSABLE COMMON SHARES OF HYDROGENICS CORPORATION  SPECIMEN GC3041799 CA4488832078 OACTIONS ORDINAIRES ENTIÉREMENT LIBÉRÉES DE  FULLY PAID AND NON-ASSESSABLE COMMON SHARES OF HYDROGENICS CORPORATION  SPECIMEN GC3041799 CA4488832078 OACTIONS ORDINAIRES ENTIÉREMENT LIBÉRÉES DE  FULLY PAID AND NON-ASSESSABLE COMMON SHARES OF HYDROGENICS CORPORATION  SPECIMEN GC3041799 SPECIMEN GC3041795 CA4488832078 OACTIONS ORDINAIRES ENTIÉREMENT  LIBÉRÉES DE FULLY PAID AND NON-ASSESSABLE COMMON SHARES OF HYDROGENICS  CORPORATION SPECIMEN GC3041799 CA4488832078 OACTIONS ORDINAIRES ENTIÉREMENT  LIBÉRÉES DE FULLY PAID AND NON-ASSESSABLE COMMON SHARES OF HYDROGENICS  CORPORATION SPECIMEN GC3041799 FULLY PAID AND  NON-ASSESSABLE COMMON SHARES WITHOUT PAR VALUE IN THE CAPITAL OF HYDROGENICS  CORPORATION These shares are transferable only in the securities register of  the Corporation by the registered holder or his attorney, upon surrender of  this certificate properly endorsed. This certificate is not valid until  countersigned by the Transfer Agent and registered by the Registrar. IN  WITNESS WHEREOF, the corporation has caused this certificate to be signed by  its duly authorized officers. President and Chief Executive Officer /  President et chef de la direction Chief Financial Officer / Chef des services  financier This Certificate is transferable at the transfer offices of CIBC  Mellon Trust Company in Calgary and Toronto, Canada and at the transfer  offices of Mellon Shareholder Services LLC In Jersey City, NJ and Pittsburg,  PA, USA. ACTIONS ORDINAIRES ENTIÈREMENT LIBÉRÉES, SANS VALEUR NOMINALE DU  CAPITAL DE CORPORATION HYDROGÉNIQUE Ces actions peuvent étre transférées  seulement dans le registre des valeus de la Société par le titulaire inscrit  ou par son procureur sur remise du présent certificat dûment endossé. Le  présent certificat n’est valide á moins d’ètre contresigné par le préposé au  transfert et inscrit par le comptable des transferts. EN FOI DE QUOI, la  Socièté a fait signer ce certificat par ses dirigeants dûment autorisés. Date  / Le: MAR 04, 2010 Countersigned and registered CIBC Mellon Trust Company  Transfer agent an registrar or Mellon Investor Services LLC Co-Transfer Agent  and Registrant Contresigned registré Compagnle Trust CIBC Mellon  Agent des Transferrs et Agent charge ou Mellon Investor Services LLC Co-agent  des Transferrs et Co-agent chargé de la tenue des registres By / Par: Authorized signature /  Signature autorisee Ce certificate est transferable aux bureau des transferts  de compagnie Trust CIBC Mellon à Calgary et Toronto, Canada ou au bureau de  transfert de Compagnie Mellon à Jersey City, NJ et Pittsburg, PA, USA. SECURITY  INSTRUCTIONS ON REVERSE VOIR LES INSTRUCTIONS DE SÈCURITÈ AU VERSO |
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|  | For value [ILLEGIBLE], the undersigned hereby sell(s), assign(s)  and transfer(s) unto Pour valeur recue, le soussigné vend, céde et transporte  à (Print name(s) of person(s) to whom the securities are being transferred  and the address for the register / Ecrivez le nom de la ou des personnes à  qui les titres sont transférés et L’adresse pour le registre) shares/(number  of shares if blank, deemed to be all / actions nombre d’actions - s’il n’y a  rien d’ecrit, la totalité présumée) of the Company represented by this  certificate, and hereby irrevocably constitutes and appoints the attorney of  the undersigned to transfer the said securities with full power of  substitution in this matter: de la Compagnie représentées par le présent  certificat et constitue et nomme irrévocablement procureur du ou des soussignés  pour transférer lesdits titres avec plein pouvoir de substitution à cet  égard: Dated / Fait le Signature Guarantee(s)* /Garantie des signatures* (the  transfer cannot be processed without acceptable guarantees of all signatures  / le transfert ne peut étre effectué sans une garantie acceptable de chaque  signature) Transferor(s) Signature(s)* / Signature du ou des cédants* * For  transfers signed by the registered holder(s), their signature(s) must  correspond with the name(s) on the certificate in every particular, without  any changes. In addition, every signature must be Signature Guaranteed by a  Canadian Schedule 1 chartered bank, a major trust company in Canada, or a  member of one of the recognized medallion programs - Securities Transfer  Agents Medallion program (STAMP), Stock Exchanges Medallion Program (SEMP) or  New York Stock Exchange, Inc. Medallion Signature Program (MSP). * Pour les  transferts signés par le ou les détenteurs inscrits, chaque signature doit  correspondre exactement avec le ou les noms sur le ou les certificats, sans  aucun changement. Aussi, chaque signature doit étre garantie par une banque à  charte de l’Annexe 1, une importante société de fiducie au Canada, ou un  member de l’un des programmes de garantie Medallion - Securities Transfer  Agents Medallion program (STAMP), Stock Exchanges Medallion Program (SEMP) ou  New York Stock Exchange, Inc Medallion Signature Program (MSP). SECURITY  INSTRUCTIONS - INSTRUCTIONS DE SÉCURITIÉ THIS IS WATERMARKED PAPER, DO NOT ACCEPT WITHOUT NOTING WATERMARK.  HOLD TO LIGHT TO VERIFY WATERMARK. PAPIER FILIGRANÉ, NE PAS ACCEPTER SANS VÉRIFIER LA PRÉSENCE DU FAIRE, PLACER À LA LUMIÈRE. FILIGRANE. POUR CE

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