Marshall Wace
Marshall Wace LLP · SEC CIK 1318757
Systematic long/short, built on signals.
This filing is 67 days old. Marshall Wace LLP keeps roughly 63% of its positions in a typical quarter, so about 71% of this book is likely still intact today.
How half-life is computedSnapshot half-life is the number of days after the period end at which half of this specific fund's reported book is expected to have changed, measured from its own past filings. It is a decay estimate, not knowledge of current positions.
Largest holdings, as filed
Top 10 of 2,719 positions. Weights are against the whole filed book. 13F filings cover US-listed holdings only.
| Company | Ticker | Value | % of book | Freshness |
|---|---|---|---|---|
| ISHARES-S&P 500 | IVV | $29.83B | 25.2% | |
| SPDR PORTFOLIO L | SPYM | $4.12B | 3.5% | |
| APPLE INC | AAPL | $2.63B | 2.2% | |
| AMAZON.COM INC | AMZN | $2.27B | 1.9% | |
| ADV MICRO DEVICE | AMD | $2.26B | 1.9% | |
| NVIDIA CORP | NVDA | $1.73B | 1.5% | |
| MICRON TECH | MU | $1.56B | 1.3% | |
| MICROSOFT CORP | MSFT | $1.25B | 1.1% | |
| COSTCO WHOLESALE | COST | $1.10B | 0.9% | |
| MORGAN STANLEY | MS | $971.79M | 0.8% |
Freshness: how likely each position is still held today, from this fund's own turnover history, each position's tenure and the filing's age. Hover a bar for the numbers. Method.
What changed last quarter
Between Q1 2026 and Q2 2026, the largest add was IVV (shares up 52%), now $29.83B; the largest trim was SPYM (shares down 6%); SPYM, NVDA, MSFT no longer appear among the previous quarter's largest positions. All of it computed from the two filings, nothing inferred.
Biggest buys, Q2 2026
Common questions
What are Marshall Wace's biggest holdings?
As of the Q2 2026 13F, the largest reported positions at Marshall Wace LLP are IVV (25.2% of the book), SPYM (3.5% of the book), AAPL (2.2% of the book).
How big is Marshall Wace LLP's portfolio?
The latest 13F reports $118.51B across 2,719 US-listed positions. 13F filings cover US-listed holdings only, so non-US positions and shorts are not included.
Does Marshall Wace still hold these positions?
Unknown for certain: a 13F may be filed up to 45 days after quarter end. Based on Marshall Wace LLP's own filing history, the fund keeps roughly 63% of positions in a typical quarter, so at 67 days since the period end roughly 71% of this book is likely intact. The snapshot half-life for this fund is about 135 days.
What did Marshall Wace buy and sell last quarter?
Between Q1 2026 and Q2 2026, the largest add was IVV (shares up 52%), now $29.83B; the largest trim was SPYM (shares down 6%); SPYM, NVDA, MSFT no longer appear among the previous quarter's largest positions. All of it computed from the two filings, nothing inferred.
Funds with overlapping books
Inside the app: the full book for Marshall Wace LLP, quarter on quarter buys and sells, consensus across 140+ funds and copy-to-watchlist.
Source: SEC EDGAR 13F filings. Values are as filed and cover US-listed positions only. A 13F may be filed up to 45 days after the quarter ends, so positions can change before the filing is even public; the freshness figures above quantify that lag instead of hiding it. Educational information, not financial advice.