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Thaddeus Stakely Cook

SEARLE & CO.
GREENWICH, CT
·CRD# 6525132·11 years experience

Professional Summary

Thaddeus Stakely Cook is a registered financial advisor currently at SEARLE & CO. located in Greenwich, Connecticut. Thaddeus is registered as a RR (Registered Representative) and started their career in finance in 2015. Thaddeus has worked at 3 firms and has passed the Series 63, SIE and Series 7 exams.

At a Glance

Best-Interest Standard

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Fiduciary Standard

Fee Structure

Account Minimum

Active Clients

Other Aliases

There are no additional aliases reported.

Blog Corner

More Resources

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Videos & Posts

This advisor has not added any videos or posts yet.

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Contact Information

This advisor has not claimed their profile yet, so there is no contact information to display at this time.

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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

11 years in the financial services industry

Current & Past Employments

Current

SEARLE & CO.Current·CRD# 13035
RIA
BD
333 Greenwich Ave., Greenwich, CT 06830
June 26, 2025 - Present

Past

SECURITIES RESEARCH, INC. OF FLORIDAPast·CRD# 6516
BD
Vero Beach, FL
November 1, 2017 - June 20, 2025
SHEARMAN, RALSTON INC.Past·CRD# 7320
BD
Greenwich, CT
November 16, 2015 - December 5, 2016

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Current Firm

S&
SEARLE & CO.

SEARLE & CO.

CRD#: 13035 / SEC#: 801-68574, 8-28600
RIA
Registered Investment Advisory firm - SEC (11/30/2007 Approved)
Connecticut
Registered Investment Advisory firm - SEC (12/5/2007 Terminated)
BD
Broker-Dealer Firm Regulated by FINRA (Boston district office)
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

333 Greenwich Ave., Greenwich, CT 06830

Mailing Address

333 Greenwich Ave., Greenwich, CT 06830

Phone Number

(203) 869-4800

Established

Connecticut since 11/22/1982

Firm Type

Corporation

Fiscal Year End

September

Firm Size

Small

# of Employees

13

SEC notice filing (9 States and Territories)

Registered to provide investment advisory services in 9 US states and territories.

FINRA licenses (25 States and Territories)

Registered to provide investment advisory services in 9 US states and territories.

Documents

Customer Relationship Summary (CRS / SEC)Customer Relationship Summary (CRS / FINRA)Latest Form ADV

Part 2 Brochures

SEARLE & CO. FORM ADV PART 2A: DISCLOSURE BROCHURE (12/16/2025)

Direct owners and executive officers

NamePositionCRD#
SEARLE, ROBERT SOUTHWORTHPRESIDENT/CHIEF COMPLIANCE OFFICER, CFO839312
COOK, THADDEUS SAJOUSVICE PRESIDENT856315
PETERS, KAREN LYNNFIN OP2080613

Regulatory Assets Under Management

Total Number of Accounts

129

AUM (Assets Under Management)

$629,892,525

Disclosures

Regulatory Event

4

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Other business activities

Information obtained from regulatory filings. Advisors can request corrections through their firm or regulator.

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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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".
S&
SEARLE & CO.

SEARLE & CO.

CRD#: 13035 / SEC#: 801-68574, 8-28600
RIA
Registered Investment Advisory firm - SEC (11/30/2007 Approved)
Connecticut
Registered Investment Advisory firm - SEC (12/5/2007 Terminated)
BD
Broker-Dealer Firm Regulated by FINRA (Boston district office)
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).

State Registrations and Notice Filings

Listed states reflect where the advisor is authorized to serve clients under state regulations.
RR
indicates the advisor is registered as a Registered Representative in this state, allowing securities offerings such as stocks, bonds, and mutual funds through a broker-dealer.
RR
Connecticut
(10/22/2025)
RR
New York
(6/26/2025)

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.

Exams

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

Series 63 — Uniform Securities Agent State Law Examination

Passed Jan 2016About the Series 63 exam

SIE — Securities Industry Essentials Examination

Passed Oct 2018About the SIE exam

Series 7 — General Securities Representative Examination

Passed Nov 2015About the Series 7 exam
FINRA
SRO Registrations

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CRS (Client Relationship Summary) - BD

Click below to view Thaddeus Stakely Cook's CRS (Customer Relationship Summary).

CRS (Customer Relationship Summary)

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