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Hedge fund, long-only 13F filer

Marshall Wace

Marshall Wace is a London long/short equity firm founded by Paul Marshall and Ian Wace in 1997, known for its systematic TOPS process that turns broker ideas into portfolios. It discloses US-listed long equity (and some options) positions each quarter on SEC Form 13F — bonds, cash, private businesses and non-US holdings are not in that filing.

118.5BUSDreported value
3,103positions
+25.1BUSDon the prior filing
IVVlargest holding, 23.5%

How has Marshall Wace's portfolio moved against the S&P 500?

Rebuilt from its quarterly filings, Marshall's disclosed portfolio is up 54% since September 2024. Over the stretch where we can compare, since December 2025, it is up 14% against 9% for the S&P 500. The latest filing, for the quarter ended 30 June 2026, lists 3,103 positions worth 118.5B USD.

Marshall's disclosed holdings, rebuilt at each filing

S&P 500, from Dec 2025, drawn from Marshall's level then

Long US stock only, held from one filing to the next: an illustrative read, not an audited return.

See the holdings

References
  1. SEC EDGAR Form 13F-HR, quarterly, up to 45 days delayed. Filings are public records. Ticker mapping via SEC public files and OpenFIGI.
  2. Finazon prior-day close, indicative (IEX-derived, not the official close), some closes dollar-rounded at the source