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Adviser and broker representative · Siebert Advisornxt, LLC.

Brett A. Sonzogni

CRD 6768295 · New York, NY

At a glance

Brett A. Sonzogni is an investment adviser representative with Siebert Advisornxt, LLC. in New York, NY, according to the SEC’s Investment Adviser Public Disclosure records. The earliest registration on Brett’s SEC record dates to 2018, about 8 years ago. Brett is also registered as a broker representative.

Current advisory firm

SEC adviser record

Registered since
2018 (8 years)
Designations
None on file
Exams
Series 66
Registered in
2 states
Also a broker representative
Yes
Disclosures on record
None

AtlasMembers

Brett’s office, career and moves

Their branch office with the firm’s business phone and website, every registration on their SEC record with dates, their employment history and outside business. Atlas members see all of it.

Branch office address, business phone and website
Locked
Previous firms, with start and end dates
3 firmsLocked
Employment history
Locked
States they’re registered in
Locked
Outside business activities
Locked
When they joined their current firm, and their firm’s growth
Locked
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Free while Atlas launches: create a free account and confirm your email. Every figure comes from SEC filings.

Something wrong? Ask for a correction. Source: the SEC’s Investment Adviser Public Disclosure records, as of October 2026. The full record, including any disclosure details, is on the SEC’s adviser search and FINRA BrokerCheck.

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