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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%

What does Marshall Wace hold?

ISHARES-S&P 500 (IVV) is the largest disclosed position, at 23.5% or 29.8B USD. The 15 largest positions, listed below, make up 41% of the 118.5B USD portfolio.

SEC EDGAR Form 13F-HR, quarter ended 30 June 2026

Top holdings by reported value
PositionValueWeightSharesLast quarter
IVVISHARES-S&P 50029.8B USD23.5%39.8MAdded
SPYMSPDR PORTFOLIO L4.1B USD3.3%46.9MHeld
AAPLAPPLE INC2.6B USD2.1%9.1MHeld
AMZNAMAZON.COM INC2.3B USD1.8%9.5MHeld
AMDADV MICRO DEVICE2.3B USD1.8%3.9MHeld
NVDANVIDIA CORP1.7B USD1.4%8.6MTrimmed
MUMICRON TECH1.6B USD1.2%1.3MAdded
MSFTMICROSOFT CORP1.2B USD1.0%3.3MHeld
COSTCOSTCO WHOLESALE1.1B USD0.9%1.2MAdded
MSMORGAN STANLEY971.8M USD0.8%4.6MHeld
TSLATESLA INC920.4M USD0.7%2.2MHeld
TSMTAIWAN SEMIC-ADR864.6M USD0.7%1.8MHeld
GOOGLALPHABET INC-A790.1M USD0.6%2.2MTrimmed
HLTHILTON WORLDWIDE766.4M USD0.6%2.3MHeld
UNHUNITEDHEALTH GRP761.9M USD0.6%1.8MAdded
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