# Cathexis Holdings

Cathexis Holdings is a Single Family Office based in Houston, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Houston, United States
- **Region:** North America
- **Address:** Houston, TX, United States
- **Founded:** 2006
- **Assets under management:** 1300 (Altss estimate)
- **Website:** cathexis.com
- **LinkedIn:** https://www.linkedin.com/company/cathexis-holdings-lp

## Regulatory record

- **Reports private funds:** No

## About

Cathexis Holdings was founded in 2006 to manage the Harrison family fortune. William Harrison serves as principal. The firm allocates across real estate, infrastructure, energy transition assets, private equity, and venture capital. It uses direct co-investments, SPVs, and permanent capital structures rather than finite-life funds. Confirmed positions include the Suffolk Downs mixed-use project in Boston developed with The HYM Investment Group and National Real Estate Advisors, plus Redeux Energy solar assets sold to Pine Gate Renewables. Activity spans North America and select international markets in Europe, Asia, and Africa. Deployment totals $1.3 billion. The team maintains one primary office in Houston at the former ConocoPhillips Campus. William Harrison serves as a trustee of the Museum of Fine Arts, Houston and participates in the Houston Polo Club. Jonathan Moy, Managing Director at the affiliated Cathexis Investment Management, sits on the Stanford School of Humanities and Sciences Council. Cathexis operates with a single-principal mandate and no external investment committees. This structure enables rapid decisions on long-duration holdings and direct operator partnerships without intermediary approvals or co-investor syndicates.

## Sectors

- Real Estate
- Infrastructure
- Energy Transition & Renewables
- Private Equity
- Venture Capital

## People

- William Harrison — Principal

## Questions

### Who runs investment decisions at Cathexis Holdings?

William Harrison serves as principal and directs capital allocation. The firm uses a streamlined model without boards or committees, allowing direct decisions on acquisitions and partnerships.

### How does Cathexis Holdings source proprietary deal flow?

The firm partners directly with operators and entrepreneurs on long-term opportunities. Relationships with developers such as The HYM Investment Group and Breakthrough Properties have produced projects including Suffolk Downs.

### Does Cathexis Holdings participate in fund commitments or only direct deals?

Cathexis deploys permanent capital through direct co-investments, SPVs, and outright acquisitions. It maintains a hold-forever approach rather than committing to external fund vehicles.

### What investment stages does Cathexis Holdings typically target?

The firm covers buyouts, growth equity, and venture stages from pre-seed through Series C via its Cathexis Ventures arm. It also executes infrastructure and real estate developments.

### Does Cathexis Holdings maintain philanthropic structures?

Yes. The Harrison Family Foundation and support for the Congressional Medal of Honor Foundation operate separately from the investment activities of the family office.

### What is Cathexis Holdings known posture on co-investments alongside external GPs?

The firm executes direct co-investments and joint ventures with operators and institutions such as DigitalBridge, La Caisse de dépôt et placement du Québec, and Ullico on specific assets.

## Related profiles

- [Catamaran Ventures](https://altss.com/profile/catamaran-ventures-n-r-narayana-murthy-family-office)
- [Omnica Wealth](https://altss.com/profile/omnica-wealth)

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Last updated: 2026-08-10T18:03:08.091Z

Canonical page: https://altss.com/profile/cathexis-holdings

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