Direct Answer
The AEX All-Share covers all equities listed on Euronext Amsterdam that meet the minimum eligibility criteria in Euronext's published methodology. It is broader than the AEX (25 blue chips) and the AMX (25 mid-caps), capturing the full Dutch listed equity market including smaller companies in the ASCX tier and below.
What this index covers
The AEX All-Share covers the Netherlands equity market through the Euronext Amsterdam. Euronext defines which securities are eligible, how they are selected from that pool and how much each contributes to the published number.
The eligible universe is: All equities listed on the regulated market of Euronext Amsterdam that satisfy the minimum free-float, market-capitalisation and liquidity thresholds in the published Euronext index methodology.
Understanding the eligible universe is the most important step in understanding what an index measures. An index that selects by listing venue will behave differently from one that selects by company domicile, and a sector index will have very different risk characteristics from a broad market measure even if they share some constituents.
How constituents are weighted
Free-float-adjusted market-capitalisation weighting, per the Euronext published methodology.
Weighting is the mechanism that translates a list of companies into a single number. Free-float-adjusted market-capitalisation weighting is the most common method: larger companies contribute more to the index level than smaller ones, and the free-float adjustment excludes shares that are not available to public investors (such as government-held strategic stakes or closely-held founder shares). This makes the index level reflect the actual investable market rather than total market size.
Eligible universe and eligibility rules
Eligibility rules determine which companies can be included at a review and which must exit. The key dimensions to verify are: which exchange or market segment is in scope; whether domicile or listing venue determines eligibility; the minimum free-float threshold; the liquidity screen; and whether there are sector restrictions.
For the AEX All-Share, the relevant market is the Euronext Amsterdam and the administrator is Euronext. Per the published Euronext methodology (verification date: August 31, 2026), the eligible universe is defined as: All equities listed on the regulated market of Euronext Amsterdam that satisfy the minimum free-float, market-capitalisation and liquidity thresholds in the published Euronext index methodology.
Reconstitution schedule
Quarterly, aligned with the AEX index family review schedule.
Reconstitution is the date on which the index changes shape by design rather than by price. Passive funds tracking the index must trade toward the new membership list, which creates predictable order flow around the review date. Active managers often position around reconstitution events to capture or avoid that flow.
How investors use this index
Broad Dutch equity benchmark; total-market reference for the Netherlands; used for performance attribution across all Dutch listed size segments.
For any index, three uses are distinct: as a performance benchmark (measuring how well a portfolio did relative to the market), as a product underlying (an ETF or structured product replicating the index), and as a research reference (tracking market-cap, sector weights or concentration over time). The same index can serve all three purposes, but the choice of which to use depends on the investment mandate and the specific question being answered.
Comparisons with related indexes
The AEX All-Share is most often compared with:
- AEX: 25 largest Dutch blue chips; AEX All-Share covers the full qualifying universe including smaller companies.
- AMX: 25 Dutch mid-cap companies below the AEX; AEX All-Share covers all tiers including large, mid and small.
When switching from one benchmark to another, the practical question is what changes in coverage: does the alternative add smaller companies, exclude a sector, change the weighting method or extend to a different currency? Each of these changes alters what the index can tell you about market performance.
References
- Euronext: Index Products, as published per the provider's methodology page. All methodology claims on this page are derived from this source.
Current AEX All-Share constituents
Euronext publishes and licenses the AEX All-Share 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.
- European Stock Market 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 administers the AEX All-Share?
Euronext administers the AEX All-Share under its published index methodology.
How does AEX All-Share differ from the AEX?
The AEX selects the 25 largest qualifying Dutch companies. The AEX All-Share includes all qualifying Euronext Amsterdam listings, covering a much wider universe including mid-cap and small-cap companies.
Is the AEX All-Share weighted by market capitalisation?
Yes. Free-float-adjusted market-capitalisation weighting is applied across all qualifying Euronext Amsterdam securities.
How often is the AEX All-Share reviewed?
Quarterly, on the same schedule as the broader AEX family.
Where can I find current AEX All-Share data?
Euronext publishes index data on its official pages. Swoopr does not republish licensed constituent lists.