Companies wishing to trade at HEnEx Derivatives Market are admitted as Trading Members according to the terms of the Financial Energy Market Rulebook. Companies eligible to become Trading Members at HEnEx Derivatives Market are:

   Credit Institutions or Investment Firms that have been duly licensed to execute orders on behalf of clients or trade for own account.

   Any company engaged in energy-related activity.

ATHEXClear provides Central Counter Party clearing services for HEnEx Derivatives Markets. Direct Clearing Members or General Clearing Members participate in clearing according to ATHEXClear Clearing Rulebook conditions.

Have a look at the companies already registered and trading on the HEnEx’s Energy Markets in the EnExGroup Members Table.

If you are interested in becoming a Trading Member, please contact for information regarding the terms of participation in the Energy Markets in the HEnEx’s Energy Marke

Admission Process


For the admission process follow the procedure as described in the presentation HEnEx's Derivatives Market_Onboarding Process.

See more about the membership acquisition process, membership resignation and other membership issues in HEnEx’s Derivatives Market here.

Submit the necessary forms for registration as listed below and contact the EnExGroup Member Admission Service ( ) for any questions.



Submit your application.

Fill-in the Candidate Membership, Joint Statement and KYC forms

Form TITLE mandatory file


Candidate Membership Form



Joint Statement



KYC Form


D2-1 Market Maker Application Form No

Detailed information on the procedure for acquiring the Market Maker capacity and terms  of market making can be found here.

Pay the prescribed initial and annual subscription fees. Trading Members applicable fees can be found here.


Traders Certification

Be certified as an Energy Trader.

Each Member, depending on its needs, must have a sufficient number of Certified Traders. Apply for the Energy Trading Certificate and follow the Certification Program.

Form TITLE mandatory file


Application for the Energy Trader Certificate 


Detailed information on Members’ professional competence in the Energy Markets, can be found here.



Connect to HEnEx’s Derivatives Markets.

Submit all relevant information about the persons representing your company, request the creation of users in the HEnEx’s trading systems (only for certified traders) and activate your Trading Account.

Form TITLE mandatory file
F1-3 Membership Form Yes
F1-4 Members Profile Form Yes
F1-5 Connection to the Trading Systems Form Yes


Type of Activity Declaration


D1-7 ALGO Declaration No

Active Members – Amendments


1. Trading Members must promptly notify HEnEx as to any amendment to their status on the basis of which HEnEx granted its approval for the acquisition of the Trading Member capacity.

Fill-in the Member’s Detail Change form and provide the necessary documents as appropriate.

Form TITLE mandatory file


Member’s Detail Change


2. Trading Members operating as Non-Clearing Members and cooperate with a General Clearing Member (GCM) of ATHEXClear  may request a change of GCM for the clearing of their transactions.

Fill-in the Amendment of Clearing Assignment form and contact with EnExGroup Admission Service  (

Form TITLE mandatory file


Amendment of Clearing Assignment


Admission _Contact

EnExGroup Admission Service

E-mail :
Tel : (+30) 210 33 66 548