Marshall Wace portfolio and 13F holdings: the top 10 positions reported for 2026-06-30
The 10 largest positions Marshall Wace reported on Form 13F-HR for 2026-06-30, each at 0.5% or more of its portfolio and together 40.3% of everything it reported. Share, value and quarter-over-quarter change, straight from SEC EDGAR — no price data goes into the figures above.
Reported positions
Largest share first. Positions below 0.5% of the portfolio, and anything past the 10th, are not listed
| Ticker | Company | % of fund | Value | Change |
|---|---|---|---|---|
| IVV | Ishares Tr | 25.17% | $29.83 bn | increased |
| SPYM | Spdr Portfolio L | 3.48% | $4.12 bn | reduced |
| Apple Inc | 2.22% | $2.63 bn | increased | |
 AMZN | Amazon Com Inc | 1.91% | $2.27 bn | increased |
| Advanced Micro Devices Inc | 1.91% | $2.26 bn | held | |
| Nvidia Corporation | 1.46% | $1.73 bn | reduced | |
| Micron Technology Inc | 1.31% | $1.56 bn | increased | |
| Microsoft Corp | 1.05% | $1.25 bn | held | |
| Costco Wholesale Corporation | 0.93% | $1.10 bn | increased | |
| Morgan Stanley | 0.82% | $972 m | increased |
Of the 10 positions above: increased 6 · held 2 · reduced 2. The increased ones are IVV, AAPL, AMZN, MU, COST, MS. These labels come from comparing with the previous quarter's filing — Form 13F itself has no such column. Positions sold out during the quarter do not appear here at all.
Who else holds these names
Among the 59 funds we track, those reporting the same name as a top position. Not the total number of institutions holding it — funds we do not track, and smaller positions that miss the cut, do not appear. Each fund's as-of date is its own latest filing and is not necessarily the same quarter. Linked where we have a page for them
| Ticker | Funds | Also held by |
|---|---|---|
| IVV | 5 | Bridgewater Associates, Citadel Advisors, Gotham Asset Management, Millennium Management, Tudor Investment |
| 9 | Berkshire Hathaway, Citadel Advisors, D. E. Shaw, Fisher Asset Management, Gotham Asset Management, Himalaya Capital, Soros Fund Management, Two Sigma Investments, Wedgewood Partners | |
| AMZN | 29 | Altimeter Capital, Appaloosa, ARK Investment Management, Baillie Gifford, Baupost Group, Bridgewater Associates, Citadel Advisors, Coatue Management, D. E. Shaw, Dragoneer Investment, Duquesne Family Office, Farallon Capital, Fisher Asset Management, Glenview Capital, Gotham Asset Management, Maverick Capital, Millennium Management, Pershing Square, Point72, Polen Capital, Sands Capital, Soros Fund Management, Third Point, Tiger Global, Tudor Investment, Two Sigma Investments, ValueAct, Wedgewood Partners, Whale Rock Capital |
| 8 | ARK Investment Management, Bridgewater Associates, D. E. Shaw, Dragoneer Investment, Glenview Capital, Maverick Capital, Point72, Whale Rock Capital | |
| 17 | Altimeter Capital, Appaloosa, Baillie Gifford, Bridgewater Associates, Citadel Advisors, D. E. Shaw, Fisher Asset Management, Gotham Asset Management, Maverick Capital, Millennium Management, Polen Capital, Renaissance Technologies, Sands Capital, Soros Fund Management, Tiger Global, Tudor Investment, Two Sigma Investments | |
| 3 | Appaloosa, Coatue Management, Tudor Investment | |
| 11 | Altimeter Capital, Citadel Advisors, Dodge & Cox, Fisher Asset Management, Millennium Management, Pershing Square, Polen Capital, Tiger Global, Tudor Investment, Wedgewood Partners, Yacktman Asset Management | |
| 1 | Two Sigma Investments |
Marshall Wace portfolio value: what the 13F reports, and why it is not AUM
Marshall Wace reported $118.51 bn of positions on its Form 13F-HR for the quarter ending 2026-06-30, filed with the SEC on 2026-08-13 — 44 days after the quarter closed. By reported 13F value that makes it the 8th largest of the 59 funds tracked here, between Two Sigma Investments ($132.88 bn) and Baillie Gifford ($110.23 bn).
That $118.51 bn is the 13F portfolio value, not Marshall Wace's assets under management (AUM). A Form 13F lists the long positions a manager held in US-listed securities on the last day of the quarter. Cash, bonds, positions listed outside the United States, private investments and anything held short are not on the form, and options are left out of the figures on this page. Marshall Wace's total AUM can therefore be larger than $118.51 bn, and for a manager that also runs short positions the 13F shows only one side of the book. What the number does give you is exact: it is Marshall Wace's own count of its long US equity holdings on 2026-06-30, as filed.
Marshall Wace top holdings in Q2 2026: how concentrated the portfolio is
The largest position Marshall Wace reported is Ishares Tr (IVV), at 25.17% of the portfolio — $29.83 bn. The top three — IVV, SPYM and AAPL — add up to 30.9%, and the top five to 34.7%. All 10 positions listed here come to 40.3% of what the fund reported, or $47.71 bn. With only 40.3% in its 10 largest names, the portfolio is spread widely. Most of what Marshall Wace reported sits in smaller positions that are not listed here, so the table shows where the weight is heaviest rather than the whole book.
Compared with the filing for the quarter before: IVV, AAPL, AMZN, MU, COST and MS were added to; SPYM and NVDA were cut back; AMD and MSFT were left unchanged. A position sold in full during the quarter drops off the form altogether, so exits cannot be read from this list.
Funds whose top holdings overlap most with Marshall Wace
Of the 10 positions above, Citadel Advisors reports 5 of the same names (IVV, AAPL, AMZN, NVDA, MSFT); Tudor Investment reports 5 of the same names (IVV, AMZN, NVDA, MU, MSFT); Bridgewater Associates reports 4 of the same names (IVV, AMZN, AMD, NVDA); D. E. Shaw reports 4 of the same names (AAPL, AMZN, AMD, NVDA); Fisher Asset Management reports 4 of the same names (AAPL, AMZN, NVDA, MSFT). Overlap is counted against each fund's own largest reported positions, so a fund holding the same stock as a small position does not show up here.
Marshall Wace 13F: questions and answers
What is Marshall Wace's largest holding?
Ishares Tr (IVV), at 25.17% of the reported portfolio ($29.83 bn) as of 2026-06-30. Spdr Portfolio L (SPYM) is second at 3.48%, followed by Apple Inc (AAPL) at 2.22%.
What is Marshall Wace's AUM?
Its latest Form 13F reports $118.51 bn of long positions in US-listed securities for 2026-06-30. That is the 13F portfolio value rather than total AUM: cash, bonds, non-US listings, private holdings and short positions are not included, so the firm-wide figure Marshall Wace manages can differ from it.
What did Marshall Wace buy and sell in Q2 2026?
Among its 10 largest positions, the Q2 2026 filing shows additions to IVV, AAPL, AMZN, MU, COST and MS; reductions in SPYM and NVDA. The form compares share counts between two quarter ends, so it does not show the dates or prices of the trades, and positions sold out completely are absent rather than marked.
When does Marshall Wace file its next 13F?
The filing shown here covers the quarter ending 2026-06-30 and was filed on 2026-08-13, 44 days after quarter end. Form 13F is due within 45 days of each quarter end, so the next one — for the quarter ending 2026-09-30 — is due by 2026-11-14.
How many stocks does Marshall Wace hold?
This page lists its 10 largest reported positions, which cover 40.3% of the reported value. The full filing can contain more: positions below 0.5% of the portfolio, and anything past the top 10, are not listed here, so 10 is not the number of stocks Marshall Wace owns.
Source: SEC EDGAR, Form 13F-HR — public domain, reproduced as filed. The table above is not the fund's entire portfolio. The list is capped at 10, so the 10 shown add up to 40.3% of what the fund reported — the rest does not appear here. 13F carries up to a 45-day reporting delay, covers long positions in US-listed securities only, and excludes options and short positions. Values are as reported in the filing, not current market value. No price data is involved in the figures above. Names are EDGAR's own spelling.
See the 13F filings for Marshall Wace on SEC EDGAR
This page covers one fund in one quarter. Every fund, every quarter-over-quarter change and every insider purchase live in WhaleSignals.