Donald H. Sienkiewicz

J.R. PRUNIER CAPITAL MANAGEMENT

HOLDEN, MA 01520

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CRD#: 7432087

Professional summary

Donald Hamilton Sienkiewicz, CFP® is a registered financial advisor currently at J.R. PRUNIER CAPITAL MANAGEMENT LLC located in Holden, Massachusetts.

Donald is registered as an IAR (Investment Advisor Representative) and started their career in finance in 2022. Donald has worked at 3 firms .

Question & Answer

Are you a "fiduciary"?

Yes

Aliases

None

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 Donald Hamilton Sienkiewicz'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®

CFP^®

Certified Financial Planner

Start date: 2020

Experience

Current

January 5, 2026 - Present

J.R. PRUNIER CAPITAL MANAGEMENT LLC

Office #1: 61 Boyden Rd. Suite 2, Holden, MA 01520

RIA

CRD#: 321026

HOLDEN, MA

Past

June 19, 2024 - July 7, 2025

PROFESSIONAL ADVISORY SERVICES INC

RIA

CRD#: 105397

VERO BEACH, FL

Past

October 13, 2022 - December 19, 2023

ADVOCATES FINANCIAL LLC

RIA

CRD#: 315986

WILTON, NH

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".

J.R. PRUNIER CAPITAL MANAGEMENT LLC

J. R. PRUNIER CAPITAL MANAGEMENT | J.R. PRUNIER CAPITAL MANAGEMENT LLC

CRD#: 321026 / SEC#: 801-132427

RIA

Registered Investment Advisory firm - (4/17/2025 Approved)

Massachusetts

Registered Investment Advisory firm - (4/17/2025 Terminated)

Texas

Registered Investment Advisory firm - (4/17/2025 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).

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.

Highlighted states indicate IAR registrations

IAR

Massachusetts
(2/8/2026)

IAR

New Hampshire
(1/5/2026)

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

Current Firm

J.R. PRUNIER CAPITAL MANAGEMENT LLC

J. R. PRUNIER CAPITAL MANAGEMENT | J.R. PRUNIER CAPITAL MANAGEMENT LLC

CRD#: 321026 / SEC#: 801-132427

RIA

Registered Investment Advisory firm - (4/17/2025 Approved)

Massachusetts

Registered Investment Advisory firm - (4/17/2025 Terminated)

Texas

Registered Investment Advisory firm - (4/17/2025 Terminated)

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Contact information

Main Address

61 Boyden Rd. Suite 2, Holden, MA 01520

Mailing Address

Phone number

(508) 756-8080

Established

Firm type

Fiscal year end

# of Employees

SEC notice filing (3 States and Territories)

Documents

Customer Relationship Summary (CRS / SEC)

Latest Form ADV

Part 2 Brochures

ADV PART 2A- J.R. PRUNIER CAPITAL MANAGEMENT LLC (3/20/2026)

Regulatory assets under management

Total Number of Accounts	424
AUM (Assets Under Management)	$ 407,009,712

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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Donald H. Sienkiewicz

Professional summary

Question & Answer

Aliases

Other business activities

Blog Corner

CRS (Client Relationship Summary) - RIA

Click below to view Donald Hamilton Sienkiewicz's CRS (Customer Relationship Summary).

Certified licenses

Experience

J.R. PRUNIER CAPITAL MANAGEMENT LLC

PROFESSIONAL ADVISORY SERVICES INC

ADVOCATES FINANCIAL LLC

Primary Firm SEC Registration

J.R. PRUNIER CAPITAL MANAGEMENT LLC

State Registrations and Notice Filings

Exams

Current Firm

J.R. PRUNIER CAPITAL MANAGEMENT LLC

Contact information

SEC notice filing (3 States and Territories)

Documents

Part 2 Brochures

Regulatory assets under management

Red Flags

Company Information

J.R. PRUNIER CAPITAL MANAGEMENT LLC

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