SEC Form 13F-HR · institutional holdings · free

Marshall Wace 13F holdings

The latest 13F-HR filed by Marshall Wace covers the period ending 2026-06-30, with 2,748 reported positions. The largest positions by reported value are below, as filed.

CIK 0001318757 · accession 0001318757-26-000010 · view the filings on SEC EDGAR · source: SEC EDGAR, Form 13F-HR information table

Period

2026-06-30

Filed

2026-08-13

Positions

2,748

Reported value

$126,697,578,778

#	Issuer	Class	CUSIP	Value	Shares	Weight
1	ISHARES-S&P 500	EQUITY OPTION	464287200	$29,961,984,288	40,008,525	23.6%
2	SPDR PORTFOLIO L	ETP	78464A854	$4,118,876,193	46,869,324	3.3%
3	APPLE INC	COMMON STOCK	037833100	$2,747,437,632	9,494,903	2.2%
4	ADV MICRO DEVICE	COMMON STOCK	007903107	$2,406,475,026	4,142,810	1.9%
5	AMAZON.COM INC	COMMON STOCK	023135106	$2,311,135,582	9,696,751	1.8%

Positions are folded by CUSIP: this filing lists 6,550 line items across 2,748 securities. A 13F reports long US-listed equity positions held at the period end, filed up to 45 days later. It is a snapshot, not a live portfolio, and it excludes shorts, cash and most non-US holdings.

What Marshall Wace bought, added, trimmed and exited

The free view above is the top of one quarter's filing. The paid report diffs the two most recent 13F filings, so you see new positions, adds, trims and exits with the size of each move, a cited write-up, and the full holdings plus changes table to download.

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Generated from public SEC EDGAR filings. Filing data is shown as filed. This is information, not investment advice.