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Market Participation

To ensure fair, efficient and competitive markets, MISO requires organizations to register as Market Participants before participating in our Open Access Transmission, Energy and Operating Reserve Markets. As a Market Participant, your company becomes a legal entity certified by MISO to submit bids to purchase energy, submit offers to supply energy and operating reserve, hold financial transmission or auction revenue rights and other market-related activities.

Use the Document Navigator below to access many of the resouces needed to manage your Market Participant Status. 

Become a Market Participant

The online Market Participant registration tool is only accessible through our secure Market Portal so you’ll need to complete a few steps before you can begin your registration. There are no fees to become a Market Participant. However, you will incur costs with registering on the OATI webRegistry, obtaining digital certificates and posting collateral with MISO to meet the credit requirements.

1. Obtain Dun & Bradstreet D-U-N-S Number

The OATI webRegistry (system of record for electric industry information), described in Step 3, requires a DUNS number.

2. Obtain a Digital Certificate

MISO requires a client-side digital certificate from one of four MISO trusted Certificate Authorities. 

  1. IdentTrust
  2. Entrust
  3. OATI
  4. Thawte

3. Register with the OATI webRegistry 

Note: Check with OATI WebRegistry for a list of accepted certificate vendors.

Your registration should be in 'approved' status prior to moving on to Step 4. 
Please complete and return via email to the attention of Customer and Asset Registration Services.
5. Using the Online Registration Tool

We developed an online tool to help you register as a Market Participant. You can access the tool as soon as we process your system access request.

You are required to complete online sections and submit legal documents based on intended market activities. The type of market activities that you identify during the application process determine your rights and obligations under the Tariff, so please read the directions carefully.

Required Legal Documents

You’ll find the legal documents required for your organization in the online registration tool. Failure to submit them by stated Commercial Model deadlines will delay processing of your application. Download the documents, obtain the necessary signatures, then return them via overnight mail only to:

ATTN: Customer & Asset Registration Services
720 City Center Drive
Carmel, IN  46032

Application Deadlines

The Network and Commercial Model Schedule indicates when Market Participants have opportunities to join the MISO.

For asset owning entities, applications must be received by stated Topology deadlines. Non-asset-owning entities may apply in accordance with stated Topology or Non-Topology deadlines.

After receiving the credit application from the online registration tool, MISO conducts a thorough credit review to determine an Applicant’s ability to meet its financial obligations. In determining credit limits, we consider rating agency reports, financial conditions, third-party references and any other available information.
Credit approval is required before MISO grants Certified Market Participant status. For more information on the MISO's Credit Policy, please refer to Attachment L.


Certified Market Participants who qualify for supplemental registration initiatives must submit the necessary documentation that corresponds to Tariff Schedule requirements.

Reactive Supply and Voltage Control (Schedule 2)

Upon request and with FERC approval, MISO provides compensation to Market Participants who have a Qualified Generator that provides reactive power and voltage control. Required documents include:

Station Power Service (Schedule 20)

Market Participants who are eligible to provide Station Power Service under Schedule 20 may register for service through On-Site Self-Supply, Remote Self-Supply, or Third-Party Supply. Required documents include:

Emergency Demand Response (Schedule 30)

Market Participants who have the capability to reduce load or operate back-up generation resources during emergency conditions can register those resources as Emergency Demand Response. Required documents include:

Blackstart Service (Schedule 33)

Certified Market Participants may register a Blackstart Unit if you have received FERC approval and meet criteria established in Schedule 33. You must commit to a minimum term of a continuous 3-year period and your unit must be tested periodically in accordance with NERC System Restoration and Blackstart reliability standards. Required documents include:


Market Participant Maintenance

It is the responsibility of all Certified Market Participants to ensure data is kept current and that any change(s) to such data is submitted to MISO according to any stated deadlines.  Failure to notify MISO of a change in information within stated deadlines may result in the change not being implemented within the requested timeframe.

Attachment B - Change of Information Document 

Use the Attachment B – Change of Information to maintain information on file with MISO. You are required to notify us of changes such as:

  • Contact Information
  • Billing or Banking Information
  • Local Security Administrator Information–also requires submitting the LSA Information Form(pdf)
  • Security Officer Information
  • Commercial Model Information

Commercial Model Asset Registration Template 

All Commercial Model dependent changes require the submission of the Master Commercial Model Data Template change template. We must also receive an Attachment B in accordance with the Network and Commercial Model deadlines.

Terminating Market Participant Status 

Please complete and sign this form if you wish to terminate your Certified Market Participant status. MISO must receive the request no later than five (5) business days prior to the requested termination date.

You may reapply to become a Market Participant no earlier than one (1) month after the effective date of termination, and only provided that you are not in default of any obligation incurred under the Tariff.

Market Participant Resources