# Primwest SA

Primwest SA is a Single Family Office based in Geneva, Switzerland.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Geneva, Switzerland
- **Region:** Europe
- **Address:** Cours de Rive 11, 1204 Genève, Switzerland
- **Founded:** 2014
- **Assets under management:** Undisclosed
- **Website:** primwest.com
- **LinkedIn:** https://www.linkedin.com/company/primwestsa

## Regulatory record

- **Reports private funds:** No

## About

Primwest SA was established in 2014 as the Swiss investment arm of the Primat family. Didier Primat, a grandson of Marcel Schlumberger and former major shareholder and board member of Schlumberger Limited, founded the holding structure. The office now operates under Bérengère Primat as president of the parent entity. Primwest deploys capital through direct co-investments, SPVs, hedge funds, private credit, private equity and real estate. Confirmed asset classes include early-stage venture positions in AI/ML, biotech and consumer technology alongside buyout and growth equity. Geographic reach spans North America, Europe, Asia, Africa, the Middle East and South America. Family real-asset holdings include Primland Resort in Virginia and Domaine des Etangs in France. The team includes Chief Investment Officer Andrew Maclean and Managing Director Simon Haworth. No public headcount or AUM figure has been released. Adjacent vehicles comprise Fondation Opale, Fondation Didier et Martine Primat and the Menil Collection in Houston. No operational events from the last 24 months appear in public records. Primwest functions as a direct-investment vehicle rather than a fund-of-funds platform. Its mandate emphasizes early-stage commitments alongside real-asset and credit strategies, with family members holding seats on the investment committee.

## Sectors

- Healthcare Services
- Data Analytics
- Energy Transition & Renewables
- Sports & Wellness
- ClimateTech

## People

- Andrew Maclean — Chief Investment Officer
- Simon Haworth — Managing Director - Real Estate & Private Credit
- Harold Primat — Investment Committee Member

## Questions

### Who runs investment decisions at Primwest SA?

Andrew Maclean serves as Chief Investment Officer. Harold Primat sits on the investment committee. Simon Haworth leads real estate and private credit.

### How does Primwest source proprietary deal flow?

The firm draws on family networks from Schlumberger Limited and operates through club memberships such as Agileo Ventures.

### Is Primwest structured as a single family office or does it operate more like a venture firm?

Primwest operates as a single-family office. It executes direct co-investments and SPVs rather than committing primarily to external funds.

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

The firm uses both direct co-investments and allocations to hedge funds and private equity vehicles.

### What investment stages does Primwest typically target?

Primwest targets pre-seed through Series B alongside buyout and growth equity.

### Does Primwest maintain philanthropic structures, and how are they separated?

The family maintains Fondation Opale, Fondation Didier et Martine Primat and Fondation Musée Schlumberger. These entities operate separately from the investment office.

## Related profiles

- [PrideCo Capital Management](https://altss.com/profile/prideco-capital-management)
- [Prince Capital Partners](https://altss.com/profile/prince-capital-partners)

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

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