# Halstatt

Halstatt is a Single Family Office based in Naples, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Naples, United States
- **Region:** North America
- **Address:** 2640 Golden Gate Parkway, Suite 105, Naples, FL 34105, United States
- **Founded:** 1992
- **Assets under management:** Undisclosed
- **Website:** halstatt.com
- **LinkedIn:** https://www.linkedin.com/company/halstatt/

## Regulatory record

- **Reports private funds:** No

## About

Halstatt was founded in 1992 by Juliet “Judy” Collier Sproul after she received land in trust from her father, Barron Collier Jr. Using that land, she developed Grey Oaks Country Club in Naples, Florida, establishing the firm’s initial real estate focus. 3 million acres across Southwest Florida. Halstatt deploys capital through four main platforms: Halstatt Real Estate Partners funds that target middle-market value-add and opportunistic real estate in Florida, the Southeast and Texas; Haversine Funding, which provides capital to specialty lenders; Trent Capital Partners, which executes middle-market buyouts; and Florida Gulfshore Capital, which makes early-stage venture investments. Confirmed positions include the Stillwell build-for-rent portfolio developed with Coastal Ridge Real Estate and multiple residential projects executed with Soltura Development Group. The firm also holds direct interests in LaPlaya Beach and Golf Resort and Mercato mixed-use center, both in Naples. Geographic reach centers on Florida and extends to Texas and other Southeast states. The firm employs a lean team led by CEO Katie Sproul. Additional family members Julie Sproul and Jennifer Sullivan oversee governance and the Halstatt Charitable Foundation respectively. Halstatt maintains memberships in the Naples Yacht Club and The Forum Club. In July 2023 Gulfshore Life profiled the Sproul family’s multi-generational approach to capital allocation and philanthropy. The firm has launched three successive real estate private equity funds and added Haversine Funding and Halstatt Legacy Partners as adjacent vehicles. Halstatt’s structure separates the core family office from third-party capital vehicles and search-fund sponsorships. An independent board enforces governance and ethics standards while the firm continues to co-invest alongside external sponsors rather than solely through proprietary deals. This architecture allows the family to maintain control of legacy real estate holdings while scaling exposure through sponsored platforms.

## Sectors

- PropTech
- Private Equity
- Venture Capital
- Specialty Lending

## People

- Katie Sproul — CEO
- Juliet Collier Sproul — Founder
- Julie Sproul — Family Board
- Jennifer Sullivan — Philanthropy Lead

## Questions

### Who runs investment decisions at Halstatt?

Katie Sproul serves as CEO and directs capital allocation across the firm’s real estate, private equity, venture and lending platforms. Julie Sproul manages family board governance and Jennifer Sullivan oversees philanthropic deployment through the Halstatt Charitable Foundation.

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

Halstatt runs its own series of real estate private equity funds and also commits to external managers through Florida Gulfshore Capital and Trent Capital Partners. It simultaneously executes direct co-investments and joint ventures with operating partners such as Coastal Ridge and Soltura.

### What investment stages does Halstatt typically target?

The firm targets buyout and growth equity through its private equity and search-fund vehicles. Real estate strategies focus on value-add and opportunistic acquisitions. Venture activity centers on early-stage companies approaching or generating initial revenue.

### How is Halstatt related to the broader Collier family?

Halstatt serves as the investment and operating arm for the Sproul branch of the Collier family. It remains separate from other Collier family entities such as Barron Collier Companies.

### Does Halstatt maintain philanthropic structures?

Yes. The Halstatt Charitable Foundation handles family and firm philanthropic commitments under Jennifer Sullivan’s direction. The foundation operates independently from the investment platforms.

### What is Halstatt’s known posture on co-investments alongside external GPs?

Halstatt routinely co-invests with external sponsors through its real estate funds, Trent Capital Partners buyouts and search-fund vehicles. It also provides capital and operational support to selected operating partners rather than acting solely as a passive LP.

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Last updated: 2026-08-10T15:58:45.833Z

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