How Do ‘Internalizers’ Differ from Traditional Dark Pools?

Internalizers are broker-dealers who execute client orders internally against their own inventory, rather than sending them to an exchange or a third-party dark pool. They essentially 'internalize' the flow.

Traditional dark pools are alternative trading systems (ATS) that match client orders from multiple firms anonymously. Both offer non-public execution, but internalizers focus on matching retail flow against their own principal capital, whereas dark pools are typically agency-based matching venues.

How Does Multilateral Netting Differ from Bilateral Netting?
What Are “Dark Pools” and How Do They Affect the Calculation of the Effective Spread?
Differentiate between ‘Bilateral Netting’ and ‘Multilateral Netting’
Could a Network of Interconnected State Channels (E.g. Lightning Network) Support a Multilateral Derivatives Market?
What Is the Primary Difference between an RFQ Platform and a Central Limit Order Book (CLOB) in Derivatives Trading?
How Do Dark Pools Compare to RFQ Platforms in Terms of Trade Anonymity and Execution?
How Do Dark Pools Relate to the Institutional Preference for Off-Exchange Trading?
What Is the Primary Difference between “Bilateral Netting” and “Multilateral Netting”?

Glossar