# ARB

ARB is a Single Family Office based in Sewall's Point, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Sewall's Point, United States
- **Region:** North America
- **Address:** Sewall's Point, FL, United States
- **Assets under management:** Undisclosed
- **Website:** arbcinc.com
- **LinkedIn:** https://linkedin.com/company/arbca

## Regulatory record

- **Reports private funds:** No

## About

Harry Halloran founded the predecessor investment activity in the 1980s after an energy career that included early wind projects. Neil Halloran succeeded his father in 2021. The office continues the original mandate of backing technologies that address climate change. ARB allocates to direct co-investments, SPVs, fund-of-funds commitments and hedge fund positions. Asset classes include private equity, real estate and startups. Confirmed focuses span renewable energy, water technologies, waste-to-value, energy efficiency, biomass, biofuels and sustainable agriculture. Activity remains concentrated in North America. The team comprises fewer than ten professionals and maintains one headquarters. Neil Halloran also chairs American Refining Group. Kathryn Coffey oversees investment activity and serves on boards including 3Degrees and Natural Systems Utilities. No recent operational events from the last 24 months appear in available records. ARB operates alongside Halloran Philanthropies, sharing staff and impact-investment oversight while keeping the two entities legally separate.

## Sectors

- ClimateTech
- Healthcare Services
- Media & Entertainment

## People

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

## Questions

### Who runs investment decisions at ARB?

Neil Halloran serves as Chairman and CEO. Kathryn Coffey, President and COO since 2011, directs all investment activity and board oversight of portfolio companies.

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

ARB uses both direct co-investments and SPVs as well as fund-of-funds and hedge fund positions.

### What investment stages does ARB typically target?

The office targets growth, late stage, pre-IPO, seed and startup opportunities.

### How is ARB related to Halloran Philanthropies?

ARB provides financial management support and collaborates on impact investments while the two entities remain separate.

## Related profiles

- [Aquitaine Famille](https://altss.com/profile/aquitaine-famille)
- [Arbitral Finance](https://altss.com/profile/arbitral-finance)

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

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