Direct Answer
The STOXX Global 1800 is a rule-based measurement of 1,800 large- and mid-cap companies across 33 developed market countries worldwide, maintained by STOXX/Qontigo. Like every index it owns nothing: it is a number produced by applying a published weighting formula to a selected list of companies, revised on a schedule the provider sets.
What this index covers
The STOXX Global 1800 covers 1,800 large- and mid-cap companies across 33 developed market countries worldwide, within the Global market. STOXX/Qontigo defines which securities are eligible, how they are selected from that pool, and how much each one contributes to the published number.
The index name does not state a fixed company count, so the number of constituents follows the eligibility rules rather than a target.
How constituents are weighted
Free float market capitalization weighted, with a 20% cap at component level applied for the global, regional and Eurozone versions. It is an aggregate of the regional 600 indices rather than a single global ranking.
The weighting method is the single biggest driver of how an index behaves. Two indexes covering the same market can diverge for years purely because they weight differently, which is why comparing index levels without knowing the method tells you very little.
What qualifies for inclusion
The combination of the STOXX Europe 600, STOXX North America 600 and STOXX Asia/Pacific 600, covering the largest developed market stocks of each regional Total Market Index by free float market capitalization. Each stock needs a minimum 3 month average daily trading value above one million euros, and one stock per company is considered.
Eligibility rules are the part of an index most readers never look at and the part that decides what it can possibly measure. A screen that excludes a whole sector, or admits only one listing venue, shapes the result far more than any day of trading does.
When the membership is revised
The regional 600 indices are reviewed quarterly in March, June, September and December, with the cut off on the last trading day of the month before the review month. Fast entry and fast exit do not apply, and deleted stocks are replaced from the parent selection list.
Reconstitution is the one date an index changes shape by design rather than by price. Funds tracking it have to trade toward the new membership, which is why the schedule matters to anyone holding the tracker rather than only to the provider.
The rule that surprises people
Each of the three regional indices is fixed at 600 stocks, and the Global 1800 aggregates the three.
References
- STOXX/Qontigo: STOXX, STOXX Index Methodology Guide (Portfolio Based Indices), September 2026 edition, as published 2026. Every rule described on this page is taken from this document.
Current STOXX Global 1800 constituents
STOXX/Qontigo publishes and licenses the STOXX Global 1800 constituent list. Swoopr does not republish it here. The provider's own page is the authoritative source for current membership and weights.
Related reading
- All stock market indexes: how indexes are built, weighted and revised.
- Global indexes: others covering the same region.
- Index concentration: measuring how much of an index sits in its largest holdings.
- Index rebalancing and inclusion effects: what happens to a stock when index membership changes.
Frequently Asked Questions
Who maintains the STOXX Global 1800?
STOXX/Qontigo maintains the STOXX Global 1800 and publishes the methodology document that defines its eligibility and weighting rules.
What does the STOXX Global 1800 measure?
It measures 1,800 large- and mid-cap companies across 33 developed market countries worldwide. The index is a calculated number applying a weighting formula to a selected list of companies, and it holds nothing itself.
Where can I see the current STOXX Global 1800 constituents?
STOXX/Qontigo publishes the current constituent list. Swoopr does not republish it, because index providers license constituent data and Swoopr holds no such licence.