StoneCalibre

Brian Wall, founder and CEO, leads investment decisions alongside Partner Usman Shakeel and Managing Director Brian Anderson. The firm operates a centralized investment committee model but discloses its four senior professionals as covering deal origination, execution, and portfolio management across North America and Europe.

StoneCalibre operates as a private investment firm managing permanent, long-term capital rather than time-bound fund vehicles. Unlike conventional private equity firms, it has no predetermined exit clock on its holdings. This allows the firm to acquire corporate divestitures and special situation assets with the intention of holding and growing them indefinitely through operational support and add-on acquisitions.

The firm targets three deal types. Corporate divestitures — acquiring non-core divisions, product lines, and complex carve-outs from Fortune 500 companies. Buy-and-builds — platform acquisitions in fragmented industries that can consolidate through organic and inorganic growth. Special situations — operational turnarounds, legacy products, financial restructurings, or assets in secular decline requiring new ownership and strategic repositioning.

Calibre Scientific is the life sciences investment platform within StoneCalibre's portfolio. It operates as a global consolidator of laboratory products, diagnostic reagents, and scientific equipment distributors and manufacturers. The platform has executed over forty add-on acquisitions, expanding from its base into the UK, Germany, Switzerland, Spain, Italy, and Brazil, deploying a buy-and-build strategy rather than early-stage venture or growth equity investing.

StoneCalibre deploys capital across North America and Europe, with portfolio company activity documented in the United States, United Kingdom, France, Germany, Spain, Switzerland, Italy, and Brazil. The firm maintains direct offices in Los Angeles, Paris, and London to support transatlantic deal origination and portfolio oversight.

StoneCalibre makes direct control investments exclusively. The firm is not structured as a fund-of-funds or a limited partner in external private equity vehicles. Its approach is to acquire companies through control transactions and operate them directly through subsidiary platforms, with no disclosed activity as an LP in third-party funds.

StoneCalibre's disclosed model does not reference co-investments alongside other general partners. The firm positions itself as a direct acquirer of corporate divestitures and special situations, typically structuring transactions to meet both seller objectives and its own permanent-hold strategy, which is structurally different from co-investment alongside time-limited fund vehicles.