# Rocksolid

Rocksolid is a Single Family Office based in Barcelona, Spain.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Barcelona, Spain
- **Region:** Europe
- **Address:** Barcelona, Spain
- **Assets under management:** Undisclosed
- **Website:** rocksolidnyc.com
- **LinkedIn:** https://www.linkedin.com/company/rocksolid-ventures

## Regulatory record

- **Reports private funds:** No

## About

Rocksolid operates as a single family office based in Barcelona. Guillem Prats Viedma serves as founder and director of Rock Solid SL and Rocksolid Real Estate SL. The firm preserves family capital through holdings in real estate and private markets. Deployment spans private equity, real estate, private credit, and direct co-investments. Confirmed positions include the Glòries Residential Project in Poblenou, the Hoxton Poblenou Hotel, and the 22@ District Office Portfolio. The office also holds Calle Balmes 152. Geographic reach covers Europe, North America, Asia, South America, and the Caribbean. Investment stages include buyouts and distressed turnaround situations. The team includes business partners Mario A. Chisholm, Ignacio Marroquin Sagales, and Antoine Chawky. Adjacent vehicles encompass Tander Inversiones and Uniq Residential. Rocksolid participates in GRI Club events in Europe and Spain. No dated operational events from the last 24 months appear in available records.

## Sectors

- PropTech
- Healthcare Services
- Energy Transition & Renewables
- GovTech
- HRTech
- FinTech
- Data Analytics
- Supply Chain & Logistics

## People

- Guillem Prats Viedma — Founder
- Mario A. Chisholm — Business Partner
- Ignacio Marroquin Sagales — Business Partner
- Antoine Chawky — Business Partner

## Questions

### Who runs investment decisions at Rocksolid?

Guillem Prats Viedma serves as founder and key director. Business partners Mario A. Chisholm, Ignacio Marroquin Sagales, and Antoine Chawky support operations across entities.

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

The firm executes direct co-investments and SPVs. It also collaborates with co-investors on specific projects such as Uniq M234 SL.

### What investment stages does Rocksolid typically target?

Stages include buyouts, distressed situations, and distressed turnaround. Real estate holdings form a core component of the portfolio.

### Which sectors does Rocksolid focus on?

Focus areas include PropTech, Healthcare Services, Energy Transition & Renewables, GovTech, HRTech, FinTech, Data Analytics, and Supply Chain & Logistics.

### Where does Rocksolid maintain its primary operations?

Headquarters sit in Barcelona. Investments extend to properties and projects in Spain with additional exposure across Europe, North America, Asia, South America, and the Caribbean.

## Related profiles

- [Rockpool Capital Limited](https://altss.com/profile/rockpool-capital-limited)
- [Rockwell Capital](https://altss.com/profile/rockwell-capital)

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Last updated: 2026-06-03T20:00:00.000Z

Canonical page: https://altss.com/profile/rocksolid

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