Chelsey L. Koster
Professional summary
Chelsey Lynn Koster, who also goes by Chelsey Lynn Koster, Chelsey Lynn Strumberger, is a registered financial advisor currently at SB ADVISORY, LLC located in Grand Rapids, Michigan and SAN BLAS SECURITIES LLC located in Grand Rapids, Michigan.
Chelsey is registered as an IAR (Investment Advisor Representative) and RR (Registered Representative) and started their career in finance in 2020. Chelsey has worked at 4 firms and has passed the Series 66, Series 7TO and SIE exams.
Question & Answer
Aliases
Other business activities
CRS (Client Relationship Summary) - RIA
Click below to view Chelsey Lynn Koster's CRS (Customer Relationship Summary).
Certified licenses
Experience
July 28, 2025 - Present
SB ADVISORY, LLC
Office #1: 1 Ionia Ave. Sw, Suite 300, Grand Rapids, MI 49503Office #2: 12935 S West Bay Shore Dr., Traverse City, MI 49684-6298July 24, 2025 - Present
SAN BLAS SECURITIES LLC
Office #1: 1 Ionia Ave Sw Suite 300, Grand Rapids, MI 49503August 11, 2023 - July 16, 2025
NEXT FINANCIAL GROUP, INC.
August 10, 2023 - July 16, 2025
NEXT FINANCIAL GROUP, INC.
October 30, 2020 - July 20, 2023
PRINCIPAL SECURITIES, INC.
September 8, 2020 - July 20, 2023
PRINCIPAL SECURITIES, INC.
Primary Firm SEC Registration
SB ADVISORY, LLC
CRD#: 154680 / SEC#: 801-77380
State Registrations and Notice Filings
Listed states reflect where the advisor is authorized to serve clients under state regulations.
Visual representation of state registrations
(7/28/2025)
(7/28/2025)
Exams
Series 7TO
Date: 9/5/2020
General Securities Representative ExaminationFINRA
Current Firm
SB ADVISORY, LLC
CRD#: 154680 / SEC#: 801-77380
Contact information
SEC notice filing (47 States and Territories)
Documents
Regulatory assets under management
| Total Number of Accounts | 1,540 |
| AUM (Assets Under Management) | $ 404,771,341 |
Red Flags
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Company Information
SB ADVISORY, LLC
CRD#: 154680Grand Rapids, MI 49503TRUST BUT VERIFY
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