SEI (NASDAQ:SEIC) announced on November 12, 2026, that Thompson, Siegel & Walmsley has launched the TSW International Equity Fund (TSWWX) on the Advisors' Inner Circle Fund platform, with the fund having commenced on November 4, 2026.

Key Highlights

  • Fund launch date: The TSW International Equity Fund (TSWWX) launched on November 4, 2026, on SEI's Advisors' Inner Circle Fund platform.
  • Strategy focus: According to the filing, the fund targets a relative-value approach to international equity investing across developed non-U.S. markets.
  • Platform scale: The Advisors' Inner Circle platform supports 44 clients and 127 funds as of September 30, 2026.
  • TSW assets under management: TSW had $20.1 billion in assets under management as of September 30, 2026, according to the filing.
  • SEI assets: SEI manages, advises, or administers approximately $2 trillion in assets as of September 30, 2026.
  • TSW background: Thompson, Siegel & Walmsley LLC is an SEC-registered investment adviser founded in 1969, and is an indirect wholly owned subsidiary of Perpetual Limited.

TSW Returns to Advisors' Inner Circle With Standalone International Equity Mutual Fund

According to the announcement, SEI (NASDAQ:SEIC) disclosed that Thompson, Siegel & Walmsley (TSW) selected the Advisors' Inner Circle Fund (AIC) platform to launch the TSW International Equity Fund (TSWWX) on November 4, 2026. The filing describes this as TSW's return to the AIC platform, re-establishing the firm's international equity strategy in a standalone open-end mutual fund structure. The fund also utilizes SEI's SEC-registered transfer agency, the filing noted.

The filing states that through the AIC platform, SEI provides fund governance, administration, transfer agency, distribution support, and related operational services. Frank Natale, Managing Director at TSW, is quoted in the filing as saying: "For more than two decades, TSW's International Equity team has successfully managed the strategy using a disciplined relative value approach. The mutual fund structure makes the strategy more accessible and easier to implement across portfolios and investment platforms, while offering existing clients additional flexibility beyond separate accounts."

Sean Lawlor, Head of Public Markets for SEI's Investment Managers business, is quoted as saying that "TSW's return to the Advisors' Inner Circle platform reflects both the strength of our long-standing relationship and the value of a proven operating model designed to support managers as their businesses evolve." The filing notes that SEI helped pioneer the series trust concept more than 30 years ago, and that the AIC platform today supports investment organizations seeking to launch mutual funds, ETFs, and interval and tender offer funds. The filing contains forward-looking statements and notes they are subject to risks detailed in SEI's Annual Report on Form 10-K for the year ended December 31, 2025.

What Was Disclosed

SEI disclosed the November 4, 2026 launch of the TSW International Equity Fund (TSWWX) on its Advisors' Inner Circle platform. TSW had $20.1 billion in AUM as of September 30, 2026, and the AIC platform supported 44 clients and 127 funds as of the same date.