Key Takeaways
- • MassPRIM's $19.5 billion private equity portfolio returned 8.4% net in FY2026, with its buyout strategy delivering 8.7% and outperforming the State Street Buyouts benchmark return of 8.3%.
- • The broader PRIT Fund generated $12.6 billion in investment gains with an 11.5% net return for the year ended March 31, 2026, though it underperformed its total fund benchmark of 12.8%.
- • Venture capital underperformance was primarily attributable to benchmark composition rather than underlying portfolio fundamentals—the State Street Private Equity Index has become concentrated in AI-focused companies including OpenAI, SpaceX, Anthropic, Databricks, Scale AI, and others, creating relative headwinds for diversified investors.
- • Despite one-year underperformance relative to public equities, MassPRIM's private equity portfolio has generated a 10-year net annualized return of 15.75%, demonstrating sustained long-term value creation.
- • In the October–December 2025 quarter, venture capital led returns at 3.3%, followed by global equity at 2.4% and small- and mid-market buyouts at 1.9%, while middle- and large-cap buyouts returned 0.9%.
Summary
Massachusetts PRIM's private equity division delivered mixed results in fiscal year 2026, with buyouts providing a bright spot amid broader market headwinds. The $19.5 billion private equity portfolio returned 8.4% net over the trailing year, with the buyout strategy generating 8.7% and outperforming the State Street Buyouts benchmark of 8.3%. This outperformance reflects disciplined execution in the middle-market and large-cap segments, though the broader private equity allocation lagged both its benchmark and U.S. public equity performance.
The overall PRIT Fund, Massachusetts' $19.5 billion flagship investment vehicle, returned 11.5% net for the year ended March 31, 2026, generating $12.6 billion in investment gains. However, this performance fell short of the fund's total capital benchmark return of 12.8%, indicating that despite strong absolute returns, the fund's asset allocation did not match market-wide gains. Michael McGirr, senior investment officer and director of private equity at PRIM, attributed the private equity portfolio's relative underperformance in venture capital to structural changes in benchmark composition rather than underlying management quality or portfolio fundamentals.
According to McGirr's remarks to the investment committee, the State Street Private Equity Index has become increasingly concentrated in artificial intelligence and technology-adjacent companies, including OpenAI, SpaceX, Anthropic, Cursor, Databricks, Scale AI, Anduril, Perplexity, and xAI. This concentration has created significant relative performance headwinds for diversified investors without proportional exposure to these high-growth, AI-focused platforms, explaining why PRIM's venture portfolio lagged despite solid underlying asset performance.
On a quarterly basis, the October–December 2025 period demonstrated more balanced performance across segments. Venture capital led with 3.3% returns, followed by global equity at 2.4% and small- and mid-market buyouts at 1.9%. Middle- and large-cap buyouts contributed 0.9% to quarterly returns, while co-investments added 0.6%. Over a longer horizon, the private equity portfolio's 10-year net annualized return of 15.75% underscores the durability of PRIM's private markets strategy despite cyclical performance variations.
The overall PRIT Fund, Massachusetts' $19.5 billion flagship investment vehicle, returned 11.5% net for the year ended March 31, 2026, generating $12.6 billion in investment gains. However, this performance fell short of the fund's total capital benchmark return of 12.8%, indicating that despite strong absolute returns, the fund's asset allocation did not match market-wide gains. Michael McGirr, senior investment officer and director of private equity at PRIM, attributed the private equity portfolio's relative underperformance in venture capital to structural changes in benchmark composition rather than underlying management quality or portfolio fundamentals.
According to McGirr's remarks to the investment committee, the State Street Private Equity Index has become increasingly concentrated in artificial intelligence and technology-adjacent companies, including OpenAI, SpaceX, Anthropic, Cursor, Databricks, Scale AI, Anduril, Perplexity, and xAI. This concentration has created significant relative performance headwinds for diversified investors without proportional exposure to these high-growth, AI-focused platforms, explaining why PRIM's venture portfolio lagged despite solid underlying asset performance.
On a quarterly basis, the October–December 2025 period demonstrated more balanced performance across segments. Venture capital led with 3.3% returns, followed by global equity at 2.4% and small- and mid-market buyouts at 1.9%. Middle- and large-cap buyouts contributed 0.9% to quarterly returns, while co-investments added 0.6%. Over a longer horizon, the private equity portfolio's 10-year net annualized return of 15.75% underscores the durability of PRIM's private markets strategy despite cyclical performance variations.
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