Granahan Investment Management

Portfolio management is led by CEO Jane White, who has been with the firm since the 1990s. The research team operates with sector analysts building proprietary models on each holding, and stock selection is committee-driven rather than centralized under a single star manager. John Granahan, the founder, remains involved in a board-level capacity but day-to-day portfolio decisions rest with White and the senior investment team.

The firm uses a bottom-up, fundamentals-driven process that emphasizes direct management meetings and proprietary earnings models. Analysts cover specific technology and healthcare subsectors, building expertise over multi-decade tenures. Granahan does not rely on sell-side research as a primary input and actively avoids stocks that are widely covered or consensus-owned among growth managers.

The firm invests primarily in small- to mid-cap companies, typically with market capitalizations between $200 million and $5 billion at initial purchase. Positions are sized to maintain a concentrated portfolio rather than a broad benchmark-like exposure, and the team is willing to hold through market cap appreciation into the mid-cap range rather than automatically trimming.

Granahan Investment Management is a dedicated institutional asset manager, not a family office or multi-family office. The firm is majority employee-owned with no outside private equity or strategic acquirer. This ownership structure has been maintained since John Granahan's founding in 1985 and now includes a broader partnership of senior investment professionals.

The firm generally avoids sectors where revenue growth is tied to commodity prices, regulated utility returns, or speculative biotech without approved products. Financials, energy, materials, and most consumer discretionary segments also fall outside the team's research coverage. Granahan's circle of competence remains firmly within enterprise software, applied AI, industrial technology, and healthcare equipment and services.

Granahan does not operate an affiliated foundation or donor-advised fund platform. The firm's architecture is deliberately simple — a single office, a single core strategy, and no adjacent philanthropic structures. Any charitable activities by individual principals are conducted separately from the asset management entity.

The firm offers its small-cap growth strategy through commingled mutual funds, collective investment trusts, and institutional separate accounts — but it does not operate a co-investment platform or club-deal structure. Separate account terms are negotiated directly with large institutional allocators and are not publicly disclosed.