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Updating your profile


Below is a list of frequently asked questions relating to member firms' business profile changes such as name, address, codes, changes to market access, clearing and settlement.

All notification requirements can be sent via mail to the following address:

Membership Team
London Stock Exchange plc
10 Paternoster Square
London EC4M 7LS

or email: membership@lseg.com  


Important information about timings on the implementation of profile changes

In accordance with the London Stock Exchange Rules, 21 days notice is required to make profile changes, excluding resignation of London Stock Exchange Membership where 3 months notice is required.

The Rules also state that a member firm must notify the Exchange immediately of any matter that is material to the member firm’s suitability as a member firm.

How do I change my company name?
Please send notification details of the name change to the Membership Team at the address above.

The Exchange will also need to see a copy of the Name Change Certificate and in certain circumstances a new Security Contract will need to be completed.

Once these have been received a Membership Consultant will complete a draft Member Firm Information Sheet (MFIS) and send it to you via email for review. The MFIS will be released to the market the day prior to the change being effective.


How do I make changes to the address (head & registered office only)?
Please send notification details of the new address to the Membership Team at the address above.

How do I update my contact details?
To update the firm’s phone, fax or email details, please send notification of the new contact details to the Membership Team.

How do I change the way I access the market?
For international markets including EQS, IOB, ITBB, the Exchange requires:

  • notification details of the required new market access
  • Customer Security Contract.

If a firm wishes to access the IOB, they must have DTC and Euroclear bank codes.

For domestic markets including SETS, the Exchange requires:

  •  notification details of the required new market access
  • Customer Security Contract
  • a copy of the Settlement Addendum
  • Intermediary Relief Self Declaration letter
  • Static Data Form
  • Order Deletion Form.


Please send notification of all required changes in market access to the Membership Team on +44 (0)20 7797 1900 or membership@lseg.com

Once the information is received, a Membership Consultant will complete a draft Member Firm Information Sheet (MFIS) and send it to you via email for review. The MFIS will be released to the market the day prior to the change being effective.

How do I register as a market maker?
Please send the information listed below to the Membership Team.

  • notification details of the request to register as a market maker
  • Registration Information Form (RIF)

The Registration Information Form (RIF) outlines the details of the securities that a firm wishes to market make in.

Please direct any further questions on the RIF to our Market Supervision Team at mktops_supervision@lseg.com

  •  Customer Security Contract

A Client Implementation Consultant will complete a draft Member Firm Information Sheet (MFIS) and send it to you via email for review. The MFIS will be released to the market the day prior to the change being effective.

If you wish to become a market maker, please ensure that you are familiar with your obligations. To view the London Stock Exchange Market Maker Rules please click here (rules 4000-4510)

How do I de-register from market making in a security?

Firms are reminded that a market maker may not de-register from a security within three months of its initial registration, or re-register in a security within three months of de-registration in respect of the same security.

To de-register, please send notification details of the request to the Membership Team.

A Membership Consultant will complete a draft Member Firm Information Sheet (MFIS) and send it to you via email for review. The MFIS will be released to the market the day prior to the change being effective.

How do I change my settlement provider?
Please send notification and details of the change of settlement provider to the Membership Team. A Membership Consultant will liaise with you on the process that will follow.

You will need to inform your current settlement agent or Model B firm of the change and the go-live date. We will also need to see a copy of the new Settlement Addendum.

If your firm has access to CCP Business, a new Static Data form will need to be completed and sent to the Membership Team. Please see the link to the Static Data Form. Once all details have been confirmed and all parties notified, a Member Firm Information Sheet will be released to the market.

How do I change my clearing provider?
Please send notification and details of the change of clearing provider to the Membership Team. A Client Implementation Consultant will liaise with you on the process that will follow.

You will need to inform your current clearer of the change and the go-live date and ensure that the relevant CCP is notified in accordance with any of their termination requirements.

A new Static Data form will need to be completed by your new clearing provider and sent to the Membership Team.


Once all details have been confirmed and all parties notified teh changes will be implemented. 

How do I change dealing capacity?
Please send the information listed below to the Membership Team: 

  • notification details of the required change in dealing capacity
  • a copy of the Settlement Agreement
  • Intermediary Relief Self Declaration letter
  • Customer Security Contract
  • Static Data Form – if CCP business.

A Membership Consultant will complete a draft Member Firm Information Sheet (MFIS) and send it to you via email for review. The MFIS will be released to the market the day prior to the change being effective.

How do I make changes to trading codes?
To make changes to your trading codes, the Exchange will require some, if not all of the information listed below which must be sent to the Membership Team:

  • notification details of the required change in dealing capacity
  • a copy of the Settlement Addendum (dependent on requirement)
  • Intermediary Relief Self Declaration letter (dependent on requirement)
  • Customer Security Contract
  • Static Data Form.

If required, a Membership Consultant will complete a draft Member Firm Information Sheet (MFIS) and send it to you via email for review. The MFIS will be released to the market the day prior to the change being effective.


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