# Crosstown Management Group

Crosstown Management Group is a Single Family Office based in San Francisco, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** San Francisco, United States
- **Region:** North America
- **Address:** San Francisco, CA, United States
- **Founded:** 2017
- **Assets under management:** 3000 (Altss estimate)
- **Website:** crosstownmg.com

## Regulatory record

- **Reports private funds:** No

## About

Crosstown Management Group was established in 2017 by Mark Heising. The firm serves the Heising-Simons family, whose capital originated from Jim Simons’ Renaissance Technologies and from Heising’s own career in venture capital and semiconductors. Liz Simons, daughter of Jim Simons, participates in governance alongside her husband. The office allocates across public equities, hedge funds, and mission-related direct investments. It avoids private equity and real estate. Confirmed positions include holdings in quantitative strategies and environmental technology companies. Activity centers on North America with additional exposure through fund commitments in Europe. The firm participates in The Giving Pledge, which Mark Heising and Liz Simons joined in 2016. David Zierk serves as Chief Investment Officer after prior work at Meritage Group. Shahid Khan acts as Managing Director following his tenure at Gilder Office for Growth. The team maintains two residential properties in Atherton and Palo Alto. Mark Heising also chairs the Environmental Defense Fund and sits on the Stanford Doerr School of Sustainability Advisory Council. No operational events from the last 24 months appear in available records. Crosstown integrates investment management with family philanthropy through the Heising-Simons Foundation and Heising-Simons Action Fund. This hybrid mandate requires coordination between taxable investment vehicles and grant-making entities, creating a distinct governance layer not typical of pure investment offices.

## Sectors

- Hedge Funds
- Philanthropic / Mission-Related Investing

## People

- Mark Heising — Founder
- David Zierk — Chief Investment Officer
- Shahid Khan — Managing Director

## Questions

### Who runs investment decisions at Crosstown Management Group?

David Zierk serves as Chief Investment Officer. Shahid Khan acts as Managing Director. Mark Heising sets overall direction as founder.

### How does Crosstown Management Group source proprietary deal flow?

The firm draws on Mark Heising’s venture and semiconductor network. It also uses relationships from prior roles at Meritage Group and Gilder Office for Growth.

### Is Crosstown Management Group structured as a single family office or does it operate more like a venture firm?

It functions as a single family office. The firm manages Heising-Simons capital exclusively and coordinates family governance alongside investments.

### Does Crosstown Management Group participate in fund commitments or only direct deals?

It allocates to hedge funds and makes direct private investments. The mix includes both fund commitments and selected direct positions.

### What investment stages does Crosstown Management Group typically target?

The office focuses on public equities and established alternative strategies. Direct private deals occur alongside hedge fund commitments.

### Does Crosstown Management Group maintain philanthropic structures, and how are they separated?

The firm coordinates the Heising-Simons Foundation and Heising-Simons Action Fund. These entities operate separately from the taxable investment portfolio.

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- [Aglaia Family Office](https://altss.com/profile/aglaia-family-office)
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Last updated: 2026-08-10T15:54:10.904Z

Canonical page: https://altss.com/profile/crosstown-management-group

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