Quantstreet Capital

RIASEC & State Registered
Total AUM
$193M
Discretionary
$193M
100% of AUM
Avg account
$2.6M
Accounts
74
Employees
2
Advisory reps
2

Firm details

Headquarters
,
CRD number
316095
Registered since
February 27, 2026
Custodians
CHARLES SCHWAB & CO., INC.
Fee structure
Percentage of AUM, Hourly Charges, Fixed Fees, Other
Client types
  • HNWI99.36%
  • Individuals0.64%
Services
Financial PlanningPortfolio Management for IndividualsPublication of PeriodicalsEducational Seminars / Workshops

Firm profile

FINTRX

Overview

Quantstreet Capital is an independent, individual-owned LLC that operates as a registered investment adviser; it registered with the SEC in 2026. The firm serves both individual and family clients as well as institutional clients and provides a mix of services including financial planning, portfolio management for individuals and small businesses, publication of periodicals/newsletters, and educational seminars or workshops. Its fee model is flexible, incorporating percentage-of-AUM billing alongside hourly and fixed fees and other arrangements. The firm notes an industry affiliation with a law firm and does not identify as an active ESG investor or a capital allocator.

Assets & Accounts

Public Holdings

Investments & Alternatives

Location & Offices

Investment profile

FINTRX

Traditional investments used

Alternative investments used

Active ESG investor

Technology & operations

FINTRX

CRM & tech providers

TAMPs used

Clients

FINTRX

Client base

Client personas

Asset composition

Asset composition: Exchange Traded Equities 61%, US Government Bonds 37%, Private Funds 2%61%
  • Exchange Traded Equities61%
  • US Government Bonds37%
  • Private Funds2%

Owners & executives

2 of 2
  • Harry Mamaysky

    Harry Mamaysky

    Chief Investment OfficerCRD 4525380

  • Isaac Mamaysky

    Isaac Mamaysky

    Chief Operating OfficerCRD 7516102

Wealth teams

FINTRX

Newly hired reps

FINTRX

Recent M&A activity

FINTRX

Recent filings

FINTRX

Awards

FINTRX

Location

Primary office

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Location

, null

Headquartered in , null.

Office locations

Similar firms

Source: FINTRX private wealth data intelligence

Intelligence for Private Wealth