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Washington State Investment Board (WSIB) is preparing to commit up to $400M to TowerBrook Capital Partners’ latest flagship buyout vehicle.
According to a recent meeting advisory ahead of WSIB’s Nov. 20, 2025, board meeting, its private markets committee is recommending WSIB invest in TowerBrook Investors VII. The fund is focused on investments in complex transactions and special situations, and the investment would deepen WSIB’s decade-long relationship with the firm.
The move, on the recommendation of consultant Albourne, would mark WSIB’s fourth consecutive flagship commitment to TowerBrook.
WSIB first backed TowerBrook in 2013 with a $200M investment in its fourth fund, followed by $450M each to Funds V and VI in 2018 and 2022, respectively. In 2022, the pension also committed $100M to TowerBrook Delta, the firm’s impact strategy.
The pension plan’s private equity investments are divided into corporate finance, growth equity, venture capital, special situations, distressed debt, and other investments, according to a June report. As of June 30, 2025, the pension plan had allocated $49.9B or 27.8% to its private equity portfolio, against a target allocation of 30%.
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