# Keystone Family Office

Keystone Family Office is a Multi Family Office based in Glen Mills, United States.

## Overview

- **Organization type:** Multi Family Office
- **Headquarters:** Glen Mills, United States
- **Region:** North America
- **Address:** Glen Mills, PA, United States
- **Founded:** 2017
- **Assets under management:** 78 (Altss estimate)
- **Website:** keystonefamilyoffice.com
- **LinkedIn:** https://www.linkedin.com/company/keystone-family-office-inc

## Regulatory record

- **Reports private funds:** No

## About

Keystone Family Office was established in 2017 by Mark Louis Marinzoli. The firm grew from principals’ existing tax, accounting, and advisory work. It serves affluent U.S. and international families with coordinated wealth management and reporting. The firm allocates across private credit, private equity, and real estate. It maintains exposure in North America and Europe. Keystone Premium Real Estate Fund LP operates from the same Glen Mills address. Sprink Investments LLC holds residential property in New Jersey. The team includes Robert Dotey as principal. Mark Louis Marinzoli also serves as president of Keystone Wealth Management Services Inc. No dated operational events from the last 24 months appear in available records. The structure ties directly to the principals’ accounting and advisory companies, which supply both the client base and operational backbone.

## Sectors

- Industrial Tech
- PropTech
- Sports & Wellness

## People

- Mark Louis Marinzoli — Vice President and Partner
- Robert Dotey — Principal

## Questions

### Who runs investment decisions at Keystone Family Office?

Mark Louis Marinzoli serves as vice president and partner. Robert Dotey acts as principal. Both hold roles tied to the firm’s founding principals.

### Does Keystone Family Office participate in fund commitments or only direct deals?

It deploys through private credit, private equity, and real estate vehicles, including Keystone Premium Real Estate Fund LP.

### What geographies does Keystone Family Office cover?

The firm operates in North America and Europe.

### How is Keystone Family Office related to Keystone Wealth Management Services Inc.?

Mark Louis Marinzoli is president and sole owner of Keystone Wealth Management Services Inc., which operates alongside the family office.

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- [Singapore Indian Development Association](https://altss.com/profile/singapore-indian-development-association)
- [Turku University Foundation](https://altss.com/profile/turku-university-foundation)

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Last updated: 2026-08-10T15:54:10.904Z

Canonical page: https://altss.com/profile/keystone-family-office

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