# ARB Family Office

ARB Family Office is a Single Family Office based in West Conshohocken, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** West Conshohocken, United States
- **Region:** North America
- **Address:** West Conshohocken, PA, United States
- **Founded:** 1996
- **Assets under management:** Undisclosed
- **Website:** arbcinc.com
- **LinkedIn:** https://www.linkedin.com/company/arb-family-office/

## Regulatory record

- **Reports private funds:** No

## About

Harry Halloran founded ARB Family Office in 1996 after decades of energy investing that began in the 1980s. He assembled positions in wind power, biomass, and related sectors before his death in 2021. Neil Halloran succeeded him as Chairman and CEO while continuing oversight of American Refining Group. ARB allocates across direct company investments, venture partnerships, and fund commitments. Confirmed holdings target renewable energy technologies, water treatment, energy efficiency, and sustainable food systems. The office has backed companies at seed through growth stages and participates in North American geographies only. Kathryn Coffey leads investment selection and serves on boards including 3Degrees and Natural Systems Utilities. The team numbers fewer than ten professionals and operates from a single headquarters. Neil Halloran also chairs American Refining Group. Adjacent vehicles include Halloran Philanthropies, Enlightened World Foundation, and the Harry and Catherine Halloran Family Foundation. Robert Kelly, Investment Development Director since 2012, additionally runs Pennsaco. ARB differs from typical single-family offices through its formal linkage to Halloran Philanthropies. The two entities share staff and coordinate grants with impact investments in clean energy and water. This structure channels family operating experience in refining and wind directly into later-stage deployment decisions.

## Sectors

- Renewable Energy
- Cleantech
- Impact Investing
- Sustainable Agriculture

## People

- Neil Halloran — Chairman and CEO
- Kathryn Coffey — President and COO
- Robert Kelly — Investment Development Director

## Questions

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

Kathryn Coffey serves as President and COO and directs all investment activity. Neil Halloran, Chairman and CEO, approves final commitments. Robert Kelly supports deal development.

### How does ARB Family Office source proprietary deal flow?

The office draws on Harry Halloran's prior relationships in wind and energy. Current principals maintain board seats at portfolio companies and participate in ImpactPHL and B Lab networks.

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

ARB commits to venture funds and also makes direct co-investments and SPVs. The website states allocations to both later-stage growth companies and funds.

### What investment stages does ARB Family Office typically target?

The office targets seed through Series G rounds plus buyouts. Confirmed stages include early, mid, and late-stage investments in climate sectors.

### How is ARB Family Office related to Halloran Philanthropies?

ARB provides financial management support to Halloran Philanthropies. The entities share impact-investment sourcing and coordinate grants with for-profit deployments.

### Does ARB Family Office maintain philanthropic structures, and how are they separated?

Halloran Philanthropies, Enlightened World Foundation, and the Harry and Catherine Halloran Family Foundation sit alongside ARB. Grants and impact investments are managed jointly but reported through separate vehicles.

## Related profiles

- [Aramis Capital Family Office](https://altss.com/profile/aramis-capital-family-office)
- [Arbol Capital](https://altss.com/profile/arbol-capital)

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

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