Themes · ranked by the share of the fund by weight that is held in S&P 500 companies

The water ETFs least like the S&P 500

See 6 funds ranked by the share of the fund by weight that is held in S&P 500 companies. Updated Oct 20, 2026. Every fund here is sold on water, and they differ in how much of the index they hand you back. The one at the top is the one adding the most that is new.

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The water ETFs least like the S&P 500
#	Ticker	Fund	Weight in S&P 500 companies ↑	Active share	Net assets	Fee
1	AQWA	Global X Clean Water ETF	25.4%	99.9%	$20m	0.50%
2	CGW	Invesco S&P Global Water Index ETF	27.7%	99.8%	$1.0bn	0.58%
3	TBLU	Tortoise Global Water ETF	33.4%	99.7%	$53m	0.40%
4	PIO	Invesco Global Water ETF	39.3%	99.5%	$270m	0.75%
5	FIW	First Trust Water ETF	48.8%	99.4%	$1.8bn	0.50%
6	PHO	Invesco Water Resources ETF	61.9%	99.4%	$2.0bn	0.59%

As of Oct 20, 2026. Source: ETFIQ.

Method

The 6 of 6 ETFs in the water theme with a filed book, least overlap first, each measured against the S&P 500 holdings ETFIQ reads for the same date.

The rest of the method

Across the funds listed here the weight held in S&P 500 companies runs from 25.4% to 61.9%. A thematic fund is worth its fee only for the part of it you do not already own. The list sorts one published figure, with no scoring or weighting. Every fund ETFIQ covers in this category is eligible, closed funds included.

How these figures are computed →Standards and sources →

Where to next

Every water ETF and what it holds→The largest water ETFs6 →

Where these figures came from

Fund holdings from SEC Form N-PORT and from the issuers own daily files ↗SEC EDGAR, full-text search of fund filings ↗SEC Form N-PORT, what a fund filed it holds ↗Rule 19a-1, what a distribution notice must say ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. A ranking is not a recommendation or an opinion.

Cite this pageCitation, APA and Markdown

ETFIQ, The water ETFs least like the S&P 500, ranked by the share of the fund by weight that is held in S&P 500 companies, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-off-index-water

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Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at Open data.