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JR

Jonathan Rosenthal

CRD# 2138109·Registered 1991 - 2013
Previously Registered: Being a previously registered professional could mean that Jonathan is no longer operating under the supervision of the SEC or FINRA. That means that the Securities and Exchange Commission may not be able to oversee the services that this specific professional is providing.

Professional Summary

Jonathan Rosenthal, who also goes by Jonathan C Rosenthal, was a registered financial advisor. Jonathan was a previously registered financial professional and started their career in finance 1991 - 2013. Jonathan had worked at 2 firms and has passed the Series 65, Series 63, Series 7 and Series 53 exams.

At a Glance

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Fiduciary Standard

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Fee Structure

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Account Minimum

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Active Clients

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Other Aliases

Jonathan C Rosenthal

Blog Corner

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Videos & Posts

This advisor has not added any videos or posts yet.

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Contact Information

No current employment

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Disclosures are events reported to regulators, such as customer disputes, regulatory actions, employment separations, or financial events. Some are resolved, denied, or contested — a disclosure is not a verdict. We recommend asking an advisor directly about any disclosure on their record.

Disclosures on record.

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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Years of Experience

35 years in the financial services industry

Current & Past Employments

SAYBROOK ADVISORS, LLC·CRD# 139018
RIA
Los Angeles, CA
February 2, 2006 - October 28, 2013
SAYBROOK CAPITAL CORPORATION·CRD# 26398
BD
Santa Monica, CA
November 27, 1991 - August 8, 2013

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Current Firm

SA
SAYBROOK ADVISORS, LLC

SAYBROOK ADVISORS, LLC | SAYBROOK TAX-EXEMPT ADVISORS, LLC | SAYBROOK COF, LP (RELYING ADVISER) | SAYBROOK COF, LP | SAYBROOK COF OFFSHORE, LLC (RELYING ADVISER) | SAYBROOK COF OFFSHORE, LLC | SAYBROOK COF II GP, LP (RELYING ADVISER) | SAYBROOK COF II GP, LP | SAYBROOK CAPITAL II, LLC (RELYING ADVISER) | SAYBROOK CAPITAL II, LLC

CRD#: 139018 / SEC#: 801-65848
RIA
Registered Investment Advisory firm - SEC (9/8/2023 Terminated)
Why is a state registration marked "Terminated"? When a firm registers with the SEC (usually after managing $100M+ AUM), it often withdraws separate state firm registrations unless required by that state. The firm can still serve clients there through its individually registered Investment Advisor Representatives (IARs).

Contact Information

Main Address

5161 Lankershim Blvd Ste 250, Los Angeles, CA 91601

Phone Number

(917) 833-4780

Documents

Latest Form ADV

Part 2 Brochures

SAYBROOK ADVISORS 2021 UPDATE (3/31/2023)

Exempt reporting advisers


Exempt Reporting Advisers ("ERA") are investment advisers that are not required to register as investment advisers because they rely on certain exemptions from registration under sections 203(l) and 203(m) of the Investment Advisers Act of 1940 and related rules. Certain state securities regulatory authorities have similar exemptions based on state statutes or regulations. An ERA is required to file a report using Form ADV, but does not complete all items contained in Form ADV that a registered adviser must complete. Other state securities regulatory authorities require an ERA to register as an investment adviser and file a complete Form ADV. Below are the regulators with which an ERA report is filed.
SEC / JURISDICTIONREPORTING STATUSEFFECTIVE DATE
CaliforniaERA - Active6/13/2025

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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.

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State Registrations and Notice Filings

Listed states reflect where the advisor is authorized to serve clients under state regulations.
This advisor is not registered in any state.

Exams

Financial professionals may take different exams throughout their careers based on the types of services they provide and roles they perform.

Series 65 — Uniform Investment Adviser Law Examination

Passed Feb 2006About the Series 65 exam

Series 63 — Uniform Securities Agent State Law Examination

Passed Apr 1991About the Series 63 exam

Series 7 — General Securities Representative Examination

Passed Apr 1991About the Series 7 exam

Series 53 — Municipal Securities Principal Examination

Passed Apr 1996About the Series 53 exam

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CRS (Client Relationship Summary)

The CRS(Customer Relationship Summary) document is not provided.

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