Do DISK and HBMX hold the same stocks?

By their latest filings, 21% of their books are the same securities at the same weight, which is a meaningful overlap. Overlap is the sum of the smaller weight of every security they share.

Which is more different from the S&P 500, DISK or HBMX?

DISK has 33% of its weight in S&P 500 names and HBMX has 30%, so DISK differs more from the index.

Which is cheaper, DISK or HBMX?

DISK charges 0.75% a year and HBMX charges 0.95%, so DISK is cheaper. Fees come from each fund's prospectus.

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DISK vs HBMX: which is really different?

DISK and HBMX hold 21% of their weight in the same names. Tema Memory ETF and Tuttle Capital Concentrated Memory Stack ETF.

32.8%

DISK in the S&P 500

29.9%

HBMX in the S&P 500

−22.7%

DISK total return, since launch

−6.4%

HBMX total return, since launch

DISK · 3 months to Sep 30, 202667% of its weight is outside the S&P 500

33% of DISK's weight is in S&P 500 companies and 67% is outside the index

HBMX · 3 months to Sep 30, 202670% of its weight is outside the S&P 500

30% of HBMX's weight is in S&P 500 companies and 70% is outside the index

ETFIQ Off-Index Score · DISK scores higherHow much of it is not the index it is sold as an alternative to?

DISK 38.9

HBMX 29.7

0.1, the lowest in this set92.0, the highest

A percentile among the 375 thematic ETFs with a holdings filing. It is a position in a set, not a rating, and neither end of it is a recommendation. All thematic ETFs ranked by it → How it is computed →

What they hold in common

By the books each fund has filed, DISK and HBMX hold 21% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Jul 31, 2026 and Sep 30, 2026.

50%

half

21% in common

Positions both hold, largest shared weight first

Holding DISK HBMX

SK HYNIX INC 15.84% 4.90%

MICRON TECHNOLOGY INC 4.88% 8.79%

SANDISK CORP 19.02% 3.95%

KIOXIA HOLDINGS CORP 16.50% 3.60%

WESTERN DIGITAL CORP 4.17% 2.28%

SEAGATE TECHNOLOGY HOLDINGS PLC 4.67% 1.19%

Only in DISK

CHANGXIN MEMORY TECHNOLOGIES-SWAP-MREX-L 5.14%

AEHR TEST SYSTEMS 4.74%

SK SQUARE CO LTD 4.73%

SAMSUNG ELECTRONICS CO LTD 4.48%

NANYA TECHNOLOGY CORP 3.99%

WINBOND ELECTRONICS CORP 3.37%

MACRONIX INTERNATIONAL CO LTD 2.60%

INNODISK CORP 2.27%

Only in HBMX

Advantest Corp 10.28%

Penguin Solutions Inc 6.40%

Onto Innovation Inc 6.06%

Camtek Ltd/Israel 5.35%

ASML Holding NV 5.34%

Lam Research Corp 4.75%

Applied Materials Inc 4.73%

Rambus Inc 4.31%

Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed.

21% of the two portfolios are the same securities at the same weight.

Performance, window by window

	Total return		vs the S&P 500		vs the Nasdaq-100
Window	DISK	HBMX	DISK	HBMX	DISK	HBMX
3 months	−13.9%	−12.7%	−16.4 pts	−15.3 pts	−16.0 pts	−14.8 pts
Since launch DISK Jun 2026 · HBMX Jun 2026	−22.7%	−6.4%	−25.1 pts	−7.3 pts	−23.3 pts	−5.7 pts

DISK and HBMX over each window. Every figure is an ETFIQ calculation with distributions reinvested. Source: ETFIQ. Open the live comparison on ETFIQ →

On the same fields

DISK

Tema Memory ETF · Holds 17 stocks in memory and storage, 33% of its weight in S&P 500 companies

HBMX

Tuttle Capital Concentrated Memory Stack ETF · Holds 23 stocks in memory and storage, 30% of its weight in S&P 500 companies

Issuer Tema Tuttle

Theme Memory and storage Memory and storage

In the S&P 500 32.8% 29.9%

Active share vs the S&P 500 96.8% 94.4%

In the Nasdaq-100 32.8% 35.3%

Holdings 17 23

Top ten, share of the fund 84.2% 60.9%

Expense ratio 0.75% 0.95%

Fee for the differing part 0.77% 1.01%

Total return, 1 year −22.7% (since launch on Jun 30, 2026) −6.4% (since launch on Jun 2, 2026)

vs the S&P 500 −25.1 pts −7.3 pts

vs the Nasdaq-100 −23.3 pts −5.7 pts

Below its high −22.7% −19.9%

Net assets $88m $27m

DISK and HBMX on the same fields, as of Sep 30, 2026. Source: ETFIQ.

DISK in plain words

By weight, 33% of DISK's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 97%. The top ten holdings are 84% of the fund across 17 positions, as published by its issuer for Sep 30, 2026. Since it launched on Jun 30, 2026 the fund returned −22.7% with distributions reinvested against +2.4% for the S&P 500, so a holder was behind by 25.1 pts. It sits 22.7% below its all-time high of Jun 30, 2026.

HBMX in plain words

By weight, 30% of HBMX's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 94%. The top ten holdings are 61% of the fund across 23 positions, as filed for Jul 31, 2026. Since it launched on Jun 2, 2026 the fund returned −6.4% with distributions reinvested against +0.9% for the S&P 500, so a holder was behind by 7.3 pts. It sits 19.9% below its all-time high of Jun 22, 2026.

Questions people ask

Do DISK and HBMX hold the same stocks?: By their latest filings, 21% of their books are the same securities at the same weight, which is a meaningful overlap. Overlap is the sum of the smaller weight of every security they share.
Which is more different from the S&P 500, DISK or HBMX?: DISK has 33% of its weight in S&P 500 names and HBMX has 30%, so DISK differs more from the index.
Which is cheaper, DISK or HBMX?: DISK charges 0.75% a year and HBMX charges 0.95%, so DISK is cheaper. Fees come from each fund's prospectus.

Other comparisons

DISK vs DRAM HBMX vs DRAM

DISK on its own →HBMX on its own →How every figure is computed →Standards and sources →

Where these figures came from

DISK filings on SEC EDGAR ↗DISK prospectus with the expense ratio (SEC) ↗Tema page for DISK ↗HBMX filings on SEC EDGAR ↗HBMX prospectus with the expense ratio (SEC) ↗Tuttle website ↗

ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement. A comparison is not a recommendation.

Cite this page

ETFIQ, DISK against HBMX, data as of Sep 30, 2026. https://etfiq.com/compare/themes/disk-vs-hbmx

Open data

Free to use with attribution. Every figure is calculated from a named public source; the method is at etfiq.com/methodology.