Key Takeaways

  • A broker effects securities transactions for others and acts as agent.
  • A dealer buys and sells securities for its own account and acts as principal.
  • Most firms register as both broker AND dealer (broker-dealer).
  • Agents are individuals representing broker-dealers; they are NOT separate broker-dealers.
  • Banks, issuers, and certain others are excluded from the broker-dealer definition.
  • Broker-dealers must register with SEC, FINRA, and states where they conduct business.
  • Form BD is filed through CRD for broker-dealer registration.
  • Agents register through Form U4 and can only be associated with one BD at a time.
Last updated: December 2025

Broker-Dealer Definition and Registration

Understanding the distinction between brokers, dealers, and agents is fundamental to securities regulation.

Key Definitions

Broker

A broker is a person (or firm) engaged in the business of effecting transactions in securities for the account of others.

CharacteristicDescription
CapacityActs as agent
Trades forCustomer's account
CompensationCommissions
Disclosure"Acting as agent"
RiskNo principal risk

Dealer

A dealer is a person (or firm) engaged in the business of buying and selling securities for its own account.

CharacteristicDescription
CapacityActs as principal
Trades forOwn account
CompensationMarkups/Markdowns
Disclosure"Acting as principal"
RiskTakes principal risk

Broker-Dealer

Most firms register as both broker and dealer because they:

  • Execute customer orders (broker function)
  • Trade from inventory (dealer function)
  • Make markets in securities (dealer function)
  • Underwrite new issues (dealer function)

Broker vs. Dealer Comparison

FunctionBroker (Agent)Dealer (Principal)
Acts forCustomersThemselves
RevenueCommissionMarkup/Markdown
Inventory riskNoneBears risk
Best executionRequiredNot applicable
DisclosureTransaction capacityTransaction capacity

Same Transaction Example

As Broker: Customer wants to buy 100 shares of XYZ. BD finds seller, executes trade, charges $50 commission.

As Dealer: Customer wants to buy 100 shares of XYZ. BD sells from its own inventory, charges markup over cost.

Agent Definition

An agent is an individual (not a firm) who represents:

  • A broker-dealer in effecting securities transactions
  • An issuer in certain securities transactions
Key PointsDetails
Individual onlyFirms cannot be agents
Represents BD or issuerNot independent
Also calledRegistered representative
RegistrationForm U4 through CRD

Agent Exclusions

These individuals are NOT agents:

ExclusionCondition
Issuer representativesSelling exempt securities
Issuer representativesIn exempt transactions
Clerical staffNo sales activities
Officers/directorsNo sales compensation

Exclusions from Broker-Dealer Definition

Persons Excluded

ExclusionReason
AgentsRepresent BDs, not separate entities
IssuersSelling their own securities
Banks and trust companiesSeparately regulated
Savings institutionsSeparately regulated
Insurance companiesFor insurance products only

Issuer Exclusion Details

An issuer is NOT a broker-dealer when selling its own securities, UNLESS:

  • Using underwriters or placement agents
  • Engaged in resales (secondary market)
  • Compensating employees for sales efforts

Registration Requirements

Broker-Dealer Registration

Registration LevelRequirements
Federal (SEC)File Form BD
Self-Regulatory (FINRA)Membership required
StateEach state where doing business

Registration Process

StepAction
1File Form BD through Web CRD
2Join FINRA or associate with FINRA member
3Register in each state
4Obtain required licenses

Form BD Contents

  • Firm identification
  • Type of business
  • Control persons and ownership
  • Disciplinary history
  • Financial information
  • Other business activities

Agent Registration

RequirementDetails
Form U4Filed through CRD
Single BD associationOne BD at a time
State registrationEach state where active
Exam requirementsSIE + representative exam
FingerprintingBackground check required

Places of Business

TypeSupervisionActivities
Main OfficeFull supervisionAll functions
OSJ (Office of Supervisory Jurisdiction)Principal on-siteOrder execution, training
Branch OfficeRegular supervisionSales, service
Non-Branch LocationPeriodic reviewLimited activities

OSJ Indicators

A location is an OSJ if it:

  • Supervises one or more branches
  • Accepts or reviews customer orders
  • Reviews customer communications
  • Conducts training for registered persons

Exam Tip: A broker acts as AGENT (for others, earns commissions). A dealer acts as PRINCIPAL (for self, earns markup). Know that agents are INDIVIDUALS, not firms.

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Broker vs. Dealer vs. Agent
Test Your Knowledge

When a broker-dealer sells securities from its own inventory to a customer, it is acting as:

A
B
C
D
Test Your Knowledge

Which of the following is excluded from the definition of a broker-dealer?

A
B
C
D
Test Your Knowledge

An agent of a broker-dealer may be associated with:

A
B
C
D
Test Your Knowledge

A location where a supervisor reviews and accepts customer orders is classified as:

A
B
C
D