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Constantine Konstantinidis

HRT FINANCIAL LP
New York, NY
·CRD# 7800873·3 years experience

Professional Summary

Constantine Konstantinidis, who also goes by Constantine Vosnos Konstantinidis, Dino Konstantinidis, is a registered financial advisor currently at HRT FINANCIAL LP located in New York, New York and HRT EXECUTION SERVICES LLC located in New York, New York. Constantine is registered as a RR (Registered Representative) and started their career in finance in 2023. Constantine has worked at 4 firms and has passed the Series 63, Series 57TO, Series 7TO and SIE 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

Constantine Vosnos Konstantinidis, Dino Konstantinidis

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Videos & Posts

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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

3 years in the financial services industry

Current & Past Employments

HRT FINANCIAL LP·CRD# 152144
BD
3 World Trade Center 175 Greenwich Street 76th Floor, New York, NY, 10007
August 14, 2026 - Present
HRT EXECUTION SERVICES LLC·CRD# 128491
BD
3 World Trade Center 175 Greenwich Street 76th Floor, New York, NY, 10007
August 14, 2026 - Present
SPIDERROCK EXS, LLC·CRD# 148743
BD
New York, NY
February 21, 2025 - June 24, 2026
SUSQUEHANNA FINANCIAL GROUP, LLLP·CRD# 35865
BD
Bala Cynwyd, PA
October 25, 2023 - January 27, 2025

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Current Firm

HE
HRT EXECUTION SERVICES LLC

HRT EXECUTION SERVICES LLC | SUN TRADING LLC

CRD#: 128491 / SEC#: 8-66143
BD
Broker-Dealer Firm Regulated by FINRA (New York district office)

Contact Information

Main Address

3 World Trade Center 175 Greenwich St 76th Floor, New York, NY, 10007

Mailing Address

3 World Trade Center 175 Greenwich St 76th Floor, New York, NY, 10007

Phone Number

(212) 293-1444

Established

Illinois since 04/24/2003

Firm Type

Limited Liability Company

Fiscal Year End

December

Firm Size

Small

FINRA licenses (1 States and Territories)

Registered to provide investment advisory services in 0 US states and territories.

Documents

Direct owners and executive officers

NamePositionCRD#
SUN HOLDINGS LLCOWNER OF HRT EXECUTION SERVICES LLC—
ALCALA, MIKAELAAML COMPLIANCE OFFICER7523021
BLOCK, NACHSHON MCHIEF FINANCIAL OFFICER7192815
CARROLL, JASON EASTWICKMANAGING MEMBER5173598
JUSTINI, PETER THOMASFINOP2097898
KEEL, JOHN MATTHEWCHIEF COMPLIANCE OFFICER4189740
MAHONEY, JOSEPHHEAD OF SALES5030145
NUNES, ADAM SETHCHIEF EXECUTIVE OFFICER5246806
O'DONNELL, PAUL ANTHONYCHIEF OPERATING OFFICER4493148

Disclosures

Regulatory Event

9

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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.
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
New York
(8/14/2026)

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 Nov 2023About the Series 63 exam

Series 57TO — Securities Trader Exam

Passed Apr 2025About the Series 57TO exam

Series 7TO — General Securities Representative Examination

Passed Oct 2023About the Series 7TO exam

SIE — Securities Industry Essentials Examination

Passed Sep 2023About the SIE exam
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CRS (Client Relationship Summary) - BD

Click below to view Constantine Konstantinidis's CRS (Customer Relationship Summary).

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