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Data as of Nov 12, 2026.

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CHAT vs LUMA: Holdings Overlap & Returns

Return, fees and overlap, side by side.

Return gap
+6.9 pts
3 months to Nov 12, 2026: CHAT ahead, total return
Fee gap
0.25 pts
A year: CHAT 0.75%, LUMA 1.00%, per filings dated Jul 8, 2026 and Aug 25, 2026
Overlap
7%
Share of the two books held in common, holdings dated Nov 12, 2026 and Nov 11, 2026
Net flow
–
Needs daily flows for both funds

Pair scorecard

CHAT costs 0.25 points a year less; CHAT is far larger, $1.5bn against $10m.

Points (pts) are percentage points.

CHAT vs LUMA: Holdings Overlap & Returns
MeasureCHATLUMA
Return
Total return, 1 year+19.6%not published
Drawdown
Below its all-time high29.9%, high on Jun 22, 202633.8%, high on Oct 6, 2026
Against its benchmark
What it tracksArtificial intelligenceAI infrastructure and chips
Against the S&P 500, 1 yearahead by 7.5 pts
Its benchmark, total return, 1 year+12.1%
Against its benchmark, 1 yearahead by 7.5 pts
Cost and size
Expense ratio0.75%1.00%
Net assets, as of Nov 11, 2026$1.5bn$10m
Holdings
Holdings in common7%

Method

Key numbers
61.0%
CHAT in the S&P 500
19.4%
LUMA in the S&P 500
+19.6%
CHAT total return, 1 year
−23.5%
LUMA total return, since launch, Jul 15, 2026
CHAT · 1 year to Nov 12, 2026 39% of its weight is outside the S&P 500
39% of its weight is outside the S&P 50061% of CHAT's weight is in S&P 500 companies and 39% is outside the index. Holdings as of Nov 12, 2026.61%39%of its weight in S&P 500 companiesof its weight outside the S&P 500active share 71% · top ten 48% of the fund · 35 holdings as published by its issuer for Nov 12, 2026 · Nasdaq-100: 67% in39% of its weight is outside the S&P 50061% of CHAT's weight is in S&P 500 companies and 39% is outside the index. Holdings as of Nov 12, 2026.61%39%in the S&P 500outsideactive share 71% · Nasdaq-100: 67% in

61% of CHAT's weight is in S&P 500 companies and 39% is outside the index. Holdings as of Nov 12, 2026.

LUMA · 3 months to Nov 12, 2026 81% of its weight is outside the S&P 500
81% of its weight is outside the S&P 50019% of LUMA's weight is in S&P 500 companies and 81% is outside the index. Holdings as of Nov 11, 2026.19%81%in the S&P 500of its weight outside the S&P 500active share 99% · top ten 55% of the fund · 27 holdings as published by its issuer for Nov 11, 2026 · Nasdaq-100: 9% in81% of its weight is outside the S&P 50019% of LUMA's weight is in S&P 500 companies and 81% is outside the index. Holdings as of Nov 11, 2026.19%81%inoutside the S&P 500active share 99% · Nasdaq-100: 9% in

19% of LUMA's weight is in S&P 500 companies and 81% is outside the index. Holdings as of Nov 11, 2026.

What they share

7%

By the books each fund has filed, CHAT and LUMA hold 7% of their money in the same securities at the same weight. Holdings dated Nov 11, 2026 and Nov 12, 2026.

0 half 100%

half

7% in common

Positions both hold · largest shared weight first CHAT LUMA
Coherent Corp 3.37% 5.72%
Lumentum Holdings Inc 2.33% 4.74%
MARVELL TECHNOLOGY INC 1.17% 3.84%
Only in one fund ↓
Only in CHAT
NVIDIA Corp 6.61%
Alphabet Inc 6.51%
Microsoft Corp 5.72%
Amazon.com Inc 5.44%
Advanced Micro Devices Inc 4.64%
Meta Platforms Inc 4.52%
Micron Technology Inc 3.84%
Cloudflare Inc 3.82%
Only in LUMA
AYAR LABS INC 9.61%
MACOM TECHNOLOGY SOLUTIONS H 5.72%
AIXTRON SE 5.65%
LAND MARK OPTOELECTRONICS 5.31%
EOPTOLINK TECHNOLOGY INC L-A 4.71%
TOWER SEMICONDUCTOR LTD 4.61%
ZHONGJI INNOLIGHT CO LTD-A 4.45%
S.O.I.T.E.C. 4.19%
Check overlap with more funds →

Window by window

Window by window: CHAT vs LUMA: Holdings Overlap & Returns
Total returnvs its benchmark
WindowCHATLUMACHATLUMA
3 months−22.1%−29.0%−19.7 pts vs VOO−20.7 pts vs EEM
6 months−17.8%–−19.6 pts vs VOO–
1 year+19.6%–+7.5 pts vs VOO–
3 years+161.8%–+83.0 pts vs VOO–
Since launchNot the same days: CHAT May 2023 · LUMA Jul 2026+189.6%−23.5%+100.4 pts vs VOO−16.7 pts vs EEM

– means no data for this window. Open this comparison in the app →

Side by side

CHAT Roundhill Generative AI & Technology ETF · Holds 35 stocks in artificial intelligence, 61% of its weight in S&P 500 companies LUMA KraneShares Photonic and Optical ETF · Holds 27 stocks in aI infrastructure and chips, 19% of its weight in S&P 500 companies
Issuer Roundhill KraneShares
Theme Artificial intelligence AI infrastructure and chips
In the S&P 500 61.0% 19.4%
Active share vs the S&P 500 71.1% 99.0%
In the Nasdaq-100 67.3% 8.6%
Holdings 35 27
Top ten, share of the fund 47.8% 54.7%
Expense ratio 0.75% 1.00%
Fee for the differing part 1.05% 1.01%
Total return, 1 year +19.6% −23.5% (since launch, Jul 15, 2026)
vs its benchmark +7.5 pts vs VOO −16.7 pts vs EEM (since launch, Jul 15, 2026)
Below its high −29.9% −33.8%
Net assets, CHAT as of Nov 12, 2026 and LUMA as of Nov 11, 2026 $1.5bn $10m

As of Nov 12, 2026. Source: ETFIQ.

7% of the two portfolios are the same securities at the same weight.

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About each fund
CHAT

By weight, 61% of CHAT's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 71%. The top ten holdings are 48% of the fund across 35 positions, as published by its issuer for Nov 12, 2026. Over the year to Nov 12, 2026 the fund returned +19.6% with distributions reinvested against +12.1% for its benchmark, the S&P 500 Total Return Index, so a holder was ahead by 7.5 pts. It sits 29.9% below its all-time high of Jun 22, 2026.

LUMA

By weight, 19% of LUMA's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 99%. The top ten holdings are 55% of the fund across 27 positions, as published by its issuer for Nov 11, 2026. Since it first traded on Jul 15, 2026 the fund returned −23.5% with distributions reinvested. It sits 33.8% below its all-time high of Oct 6, 2026.

Questions people ask

Do CHAT and LUMA hold the same stocks?
By their latest filings, 7% of their books are the same securities at the same weight. Overlap is the sum of the smaller weight of every security they share.
Which is more different from the S&P 500, CHAT or LUMA?
CHAT has 61% of its weight in S&P 500 names and LUMA has 19%, so LUMA differs more from the index.
Which is cheaper, CHAT or LUMA?
CHAT charges 0.75% a year and LUMA charges 1.00%, so CHAT is cheaper. Fees come from each fund's prospectus.
Other comparisons
CHAT vs IVEPCHAT vs COOLCHAT vs AINFCHAT vs AIPOLUMA vs AGIXLUMA vs XAIXLUMA vs AIEQLUMA vs JHAI
Where to next
All thematic ETFs ranked by the S&P 500 Difference Score →How the scores are computed →CHAT on its own →LUMA on its own →CHAT dividend history →CHAT holdings →LUMA holdings →Method →Standards and sources →
Sources and dates
CHAT filings on SEC EDGAR ↗
CHAT prospectus with the expense ratio (SEC) ↗
Roundhill page for CHAT ↗
LUMA filings on SEC EDGAR ↗
LUMA prospectus with the expense ratio (SEC) ↗
KraneShares page for LUMA ↗

Links are sources, not endorsements. A comparison is not a recommendation.

How this is computed

Overlap adds up the smaller of the two weights for each security both funds hold.

Every number is an ETFIQ calculation with distributions reinvested.

Cite this pageCitation, APA and Markdown

ETFIQ, CHAT against LUMA, data as of Nov 12, 2026. https://etfiq.com/compare/themes/chat-vs-luma

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Free to use with attribution for data ETFIQ computes; issuer data stays under its owner's terms.

CHAT and LUMA hold 7% of their weight in the same names.

CHAT on its own →LUMA on its own →
Growth of 100

CHAT and LUMA

Total return, distributions reinvested, 3 months.

CHAT −22.1%LUMA −29.0%
Aug 13, 2026Nov 12, 2026

CHAT −22.1%, LUMA −29.0%: CHAT +6.9 pts ahead, 3 months, Aug 13, 2026 to Nov 12, 2026.