Seamus T. Obrien

SEI INVESTMENTS MANAGEMENT CORP

Oaks, PA 19456

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CRD#: 4125067

Professional summary

Seamus Thomas Obrien, who also goes by Seamus Thomas O'brien, is a registered financial advisor currently at SEI INVESTMENTS MANAGEMENT CORP located in Oaks, Pennsylvania and SEI INVESTMENTS DISTRIBUTION CO. located in Oaks, Pennsylvania.

Seamus is registered as an IAR (Investment Advisor Representative) and RR (Registered Representative) and started their career in finance in 2000. Seamus has worked at 9 firms and has passed the Series 65, Series 63, SIE, Series 7 and Series 6 exams.

Question & Answer

Are you a "fiduciary"?

Yes

Aliases

Seamus Thomas O'brien

Other business activities

Outside business activity is any business or activity undertaken by an advisor that is outside the scope of their relationship with their firm (e.g., consulting services, real estate, freelance work, teaching, etc.). Investors should stay informed about these activities to ensure no conflicts of interest.

The advisor shows no other business activity.

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view Seamus Thomas Obrien's CRS (Customer Relationship Summary).

CRS (Customer Relationship Summary)

Certified licenses

Advisors may have various certifications and credentials from different organizations. AdvisorCheck highlights these seven certifications - AIF®, CFP®, ChFC®, CFA, CLU®, CIMA®, CPWA®

None

Experience

Current

June 9, 2022 - Present

SEI INVESTMENTS MANAGEMENT CORP

Office #1: One Freedom Valley Drive, Oaks, PA 19456

RIA

CRD#: 105146

Oaks, PA

Current

June 8, 2022 - Present

SEI INVESTMENTS DISTRIBUTION CO.

Office #1: One Freedom Valley Drive, Oaks, PA 19456

CRD#: 10690

Oaks, PA

Past

October 5, 2015 - May 31, 2022

PERSHING ADVISOR SOLUTIONS LLC

CRD#: 36671

KING OF PRUSSIA, PA

Past

June 6, 2008 - October 6, 2015

BNY ADVISORS

RIA

CRD#: 106108

KING OF PRUSSIA, PA

Past

June 5, 2008 - October 6, 2015

PERSHING LLC

CRD#: 7560

KING OF PRUSSIA, PA

Past

January 3, 2005 - May 20, 2008

THE LEADERS GROUP, INC.

CRD#: 37157

SUMMIT, NJ

Past

February 23, 2004 - August 27, 2004

BRINKER CAPITAL INC

RIA

CRD#: 111743

KING OF PRUSSIA, PA

Past

March 27, 2002 - August 27, 2004

BRINKER CAPITAL SECURITIES, LLC

CRD#: 38123

BERWYN, PA

Past

May 11, 2001 - November 20, 2001

SAL EQUITY TRADING, GP

CRD#: 29337

BALA CYNWYD, PA

Past

March 7, 2000 - May 18, 2001

SEI INVESTMENTS DISTRIBUTION CO.

CRD#: 10690

OAKS, PA

Primary Firm SEC Registration

This SEC-registered firm can serve clients nationwide. Some states may require the firm to submit a notice filing if the firm has more than 5 clients or a physical office there. You can view these state-level filings under the section titled "State Registrations and Notice Filings".

SEI INVESTMENTS MANAGEMENT CORP

CRD#: 105146 / SEC#: 801-24593

RIA

Registered Investment Advisory firm - (6/27/1985 Approved)

State Registrations and Notice Filings

Listed states reflect where the advisor is authorized to serve clients under state regulations.

IAR

means the advisor is registered as an Investment Advisor Representative in this state and is authorized to provide investment advice to clients there.

indicates the advisor is registered as a Registered Representative in this state, allowing them to offer securities such as stocks, bonds, and mutual funds through a broker-dealer.

Visual representation of state registrations

Pennsylvania
(6/8/2022)

IAR

Pennsylvania
(6/9/2022)

Don't see your state listed? The advisor may still be able to work with you under the federal De Minimis Rule, which allows up to five investment advisory clients in a state without registration. Some states, like TX, LA, NE, and NH, may still require registration or notice filing. Contact the advisor or their firm to confirm their investment advisory availability in your state. Note: This rule does not apply to broker-dealer activity.

Exams

State Security Law Exam

IAR

Series 65

Date: 1/16/2004

Uniform Investment Adviser Law Examination

State Security Law Exam

Series 63

Date: 3/15/2000

Uniform Securities Agent State Law Examination

General Industry/Product Exam

SIE

Date: 10/1/2018

Securities Industry Essentials Examination

General Industry/Product Exam

Series 7

Date: 1/31/2001

General Securities Representative Examination

General Industry/Product Exam

Series 6

Date: 2/17/2000

Investment Company Products/Variable Contracts Representative Examination

SRO Registrations

FINRA

Current Firm

SEI INVESTMENTS MANAGEMENT CORP

CRD#: 105146 / SEC#: 801-24593

RIA

Registered Investment Advisory firm - (6/27/1985 Approved)

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Contact information

Main Address

One Freedom Valley Drive, Oaks, PA 19456

Mailing Address

Phone number

(610) 676-1000

Established

Firm type

Fiscal year end

# of Employees

447

SEC notice filing (53 States and Territories)

Documents

Customer Relationship Summary (CRS / SEC)

Latest Form ADV

Part 2 Brochures

SIMC FORM ADV PART 2A - INDEPENDENT ADVISOR SOLUTIONS BY SEI (8/15/2025)

SIMC FORM ADV PART 2A - SEI PRIVATE BANKING (3/31/2025)

SIMC WRAP FEE BROCHURE - MANAGED ACCOUNT SOLUTIONS (INDEPENDENT ADVISOR SOLUTIONS BY SEI) (3/31/2025)

SIMC WRAP FEE BROCHURE - MANAGED ACCOUNT SOLUTIONS (PRIVATE WEALTH MANAGEMENT) (3/31/2025)

SIMC FORM ADV PART 2A - SEI INSTITUTIONAL GROUP (3/31/2025)

SIMC FORM ADV PART 2A - SEI PRIVATE WEALTH MANAGEMENT (3/31/2025)

Regulatory assets under management

Total Number of Accounts	99,603
AUM (Assets Under Management)	$ 198,143,431,156

Accountant surprise examination report

Filing Date	Form ADV-E Cover	Form ADV-E Report
10/27/2025	Cover Page	Report
01/27/2025	Cover Page	Report
10/25/2023	Cover Page	Report
01/27/2023	Cover Page	Report

Red Flags

Disclosures can be potential red flags, including customer disputes, regulatory fines, employer terminations, bankruptcies, judgments, liens, or certain criminal activities.

Check for any disclosures as part of your thorough research when choosing an advisor.

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Seamus T. Obrien

Professional summary

Question & Answer

Aliases

Other business activities

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view Seamus Thomas Obrien's CRS (Customer Relationship Summary).

Certified licenses

Experience

SEI INVESTMENTS DISTRIBUTION CO.

PERSHING ADVISOR SOLUTIONS LLC

BNY ADVISORS

PERSHING LLC

THE LEADERS GROUP, INC.

BRINKER CAPITAL INC

BRINKER CAPITAL SECURITIES, LLC

SAL EQUITY TRADING, GP

SEI INVESTMENTS DISTRIBUTION CO.

Primary Firm SEC Registration

SEI INVESTMENTS MANAGEMENT CORP

State Registrations and Notice Filings

Exams

Series 65

Date: 1/16/2004

Series 63

Date: 3/15/2000

SIE

Date: 10/1/2018

Series 7

Date: 1/31/2001

Series 6

Date: 2/17/2000

FINRA

Current Firm

SEI INVESTMENTS MANAGEMENT CORP

Contact information

SEC notice filing (53 States and Territories)

Documents

Part 2 Brochures

Regulatory assets under management

Accountant surprise examination report

Red Flags

Company Information

SEI INVESTMENTS MANAGEMENT CORP

TRUST BUT VERIFY

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