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Quantstreet Capital

Quantstreet Capital. CRD 316095

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CRD: 316095

Quantstreet Capital

$192.6M Total AUM
$192.6M Disc. AUM
-- 3Y CAGR
2 Employees
34 ADV. Clients
4 yrs Firm Age

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Firm Details

Custodian
Charles Schwab & Company ยท Interactive Brokers
Clients
Retail and Institutional
Platforms
Available
Established Date
09-13-2021
Office Locations
1

Office Locations

-- RYE NY

About Quantstreet Capital

QuantStreet Capital builds custom portfolios for high-complexity wealth clients (e.g., restricted stock, business owners) and offers ETF-based model portfolio subscriptions for other asset managers seeking a rigorous, repeatable CIO framework. Subscribers receive monthly base models plus a tactical sleeve that can shift 5-10% per month, with written rationale. The firm also consults on investment analysis, risk, and process, using in-house machine-learning tools from a CIO with major-institution and finance professor background.

Team overview

-- AVG AGE
$96.3M AVG AUM / ADVISOR
$5.7M AVG AUM / CLIENT
4.6 yrs AVG TENURE
2 Employees
2 Advisory Reps
2 RIA Reps
4yrs Firm Age

Insights

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Asset Classes

Available

Client Personas

Available

CRM

Available

Custodian

Available

Fund Managers

Available

Investment Themes

Available

Investment Vehicles

Available

Platform

Available

Services

Available

Technology

Available

Owner & Executives

H

HARRY MAMAYSKY

Chief Investment Officer, Managing Member

CRD
#4525380
Ownership
50% but less than 75%
Available
Available
Available
I

ISAAC MAMAYSKY

Chief Compliance Officer, Chief Operating Officer, Managing Member

CRD
#7516102
Ownership
50% but less than 75%
Available
Available
Available

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Contacts

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Assets Under Management

Total AUM
Discretionary
Non-Discretionary
03-06-2026
Category Assets AVG. Account size
Discretionary $192,641,359 $2,603,262
Non-Discretionary $0 --
Total $192,641,359 $2,603,262

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Separately Managed Accounts

Total SMA Asset: Available

Locked Total SMA
Equity - Exchange:
Available
U.S. Government/Agency:
Available
Private Funds:
Available
Asset class Assets Assets %
Equity - Exchange Available Available
U.S. Government/Agency Available Available
Private Funds Available Available
Total Available Available

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