Quantstreet Capital

RIASEC RegisteredEst. 2026
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 operates as an independent registered investment adviser serving high‑net‑worth individuals, families and institutional clients. The firm’s advisory mix centers on discretionary portfolio management and financial planning, augmented by client education through newsletters and seminars. Fee arrangements include percentage-of-AUM billing alongside hourly and fixed-fee engagements, which allows flexibility for one‑off planning work as well as ongoing asset management. Investment posture leans toward liquid equity exposure as the primary building block of client portfolios, with a sizable allocation to exchange‑traded instruments. Quantstreet Capital is not positioned as an ESG‑focused manager. The firm also supports multiple client types and appears to combine portfolio construction with educational outreach and written commentary as part of its client service model.

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

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Headquartered in , null.

Office locations

Similar firms

Source: FINTRX private wealth data intelligence

Intelligence for Private Wealth