# Harry Mamaysky

> Harry Mamaysky is a fee-only financial advisor at QuantStreet Capital in Rye, New York. Harry charges a percentage of assets (0.5%–0.8% a year of assets managed).

Page: https://find.wellspent.co/advisors/harry-mamaysky/
Built from SEC adviser records and the firm's website; last checked October 30, 2026.

## Facts

- **Firm:** QuantStreet Capital
- **Based in:** Rye, New York
- **Fee model:** Percentage of assets
- **Fees (firm's website):** 0.5%–0.8% a year of assets managed
- **Accepting new clients:** Yes (firm's website)
- **Assets under management (firm):** $192.6M across 74 accounts
- **CRD:** 4525380 (https://adviserinfo.sec.gov/individual/summary/4525380)
- **SEC registration:** Investment adviser representative in NY, TX
- **Exams passed:** Series 63 (2002), Series 65 (2021)
- **Firm size:** 2 employees
- **Disclosures:** None reported
- **Website:** http://www.quantstreetcapital.com

## Frequently asked questions

### Is Harry Mamaysky a fee-only financial advisor?

Yes, according to SEC records as of October 29, 2026: Harry holds no broker registration, and QuantStreet Capital reports no commissions, no broker-dealer, and no insurance sales or affiliated insurance agency on its Form ADV.

### How does Harry charge for financial advice?

Harry charges a percentage of assets.

### How much does Harry charge?

According to QuantStreet Capital's website, checked October 30, 2026: 0.5%–0.8% a year of assets managed.

### Where is Harry Mamaysky based?

Harry Mamaysky is based in Rye, New York.

### Is Harry Mamaysky registered with the SEC?

Yes. Harry Mamaysky is registered as an investment adviser representative in NY and TX (CRD 4525380), per SEC Investment Adviser Public Disclosure data as of October 29, 2026.

### How much does QuantStreet Capital manage?

QuantStreet Capital reports $192.6M across 74 accounts in assets under management.

### How do I contact Harry Mamaysky?

Through Harry's website, www.quantstreetcapital.com.

## Sources

- SEC adviser records (https://adviserinfo.sec.gov/individual/summary/4525380): the firm's Form ADV reports no commissions, no broker-dealer, and no insurance sales or affiliated insurance agency, and the advisor holds no broker registration
- SEC Investment Adviser Public Disclosure and Form ADV: registration, exams, and firm facts, data as of October 29, 2026
- The firm's website (https://quantstreetcapital.com/): specialties, clients served, and fees, checked October 30, 2026

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Source: Wellspent, the public graph of fee-only advisors (https://find.wellspent.co). No paid placement.