Do DRAM and IDEF hold the same stocks?

By their latest filings, 0% 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, DRAM or IDEF?

DRAM has 16% of its weight in S&P 500 names and IDEF has 42%, so DRAM differs more from the index.

Which is cheaper, DRAM or IDEF?

DRAM charges 0.65% a year and IDEF charges 0.55%, so IDEF is cheaper. Fees come from each fund's prospectus.

Data as of Oct 28, 2026.

Thematic ETFs

DRAM vs IDEF: Holdings Overlap & Returns

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DRAM and IDEF hold 0% of their weight in the same names.

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Net assets on Oct 28, 2026: $20.6bn for Roundhill Memory ETF and $3.7bn for iShares Defense Industrials and Tech Active ETF.

DRAM on its own →IDEF on its own →

At a glance

15.7%

DRAM in the S&P 500

42.5%

IDEF in the S&P 500

+95.0%

DRAM total return, since launch, Apr 2, 2026

−5.7%

IDEF total return, 1 year

DRAM · 6 months to Oct 28, 2026 84% of its weight is outside the S&P 500

16% of DRAM's weight is in S&P 500 companies and 84% is outside the index. Holdings as of Jun 30, 2026.

IDEF · 1 year to Oct 28, 2026 58% of its weight is outside the S&P 500

43% of IDEF's weight is in S&P 500 companies and 58% is outside the index. Holdings as of Oct 27, 2026.

Pair scorecard

IDEF costs 0.10 points a year less; DRAM is 5.6 times larger.

DRAM vs IDEF: Holdings Overlap & Returns
Measure	DRAM	IDEF
Return
Measure	DRAM	IDEF
Total return, 1 year	not published	−5.7%
Drawdown
Measure	DRAM	IDEF
Below its all-time high	33.0%, high on Jun 22, 2026	17.0%, high on Mar 2, 2026
Benchmark
Measure	DRAM	IDEF
What it tracks	Memory and storage	Defense
Cost and size
Measure	DRAM	IDEF
Expense ratio	0.65%	0.55%
Net assets	$20.6bn	$3.7bn
Holdings
Measure	DRAM	IDEF
Holdings in common	0%

Holdings in common uses holdings dated Jun 30, 2026 and Oct 27, 2026. Method

What they share

By the books each fund has filed, DRAM and IDEF hold 0% of their money in the same securities at the same weight. Holdings dated Jun 30, 2026 and Oct 27, 2026.

50%

0 half 100%

half

0% in common

Positions both hold · largest shared weight first DRAM IDEF

Samsung Electronics Co Ltd 14.37% 0.18%

Only in one fund ↓

Only in DRAM

SK hynix Inc 15.89%

Sandisk Corp 5.21%

Kioxia Holdings Corp 4.36%

Western Digital Corp 4.30%

Seagate Technology Holdings PL 4.19%

GigaDevice Semiconductor Inc 3.07%

Micron Technology Inc 2.03%

Nanya Technology Corp 1.81%

Only in IDEF

RTX 7.05%

LOCKHEED MARTIN 5.27%

GENERAL DYNAMICS CORP 4.15%

NORTHROP GRUMMAN CORP 3.92%

BOEING 3.44%

ROLLS-ROYCE HOLDINGS PLC 3.06%

PALANTIR TECHNOLOGIES CLASS A 3.02%

SPACE EXPLORATION TECHNOLOGIES COR 2.93%

Check overlap with more funds →

Window by window

Window by window: DRAM vs IDEF: Holdings Overlap & Returns
	Total return
Window	DRAM	IDEF
3 months	+20.7%	−3.0%
6 months	+41.6%	−5.8%
1 year	–	−5.7%
Since launchNot the same days: DRAM Apr 2026 · IDEF May 2025	+95.0%	+22.1%

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Side by side

DRAM Roundhill Memory ETF · Holds 12 stocks in memory and storage, 16% of its weight in S&P 500 companies IDEF iShares Defense Industrials and Tech Active ETF · Holds 155 stocks in defense, 42% of its weight in S&P 500 companies

Issuer Roundhill iShares

Theme Memory and storage Defense

In the S&P 500 15.7% 42.5%

Active share vs the S&P 500 96.8% 92.2%

In the Nasdaq-100 15.7% 10.7%

Holdings 12 155

Top ten, share of the fund 56.4% 37.3%

Expense ratio 0.65% 0.55%

Fee for the differing part 0.67% 0.60%

Total return, 1 year +95.0% (since launch, Apr 2, 2026) −5.7%

vs its benchmark not measured not measured

Below its high −33.0% −17.0%

Net assets $20.6bn $3.7bn

As of Oct 28, 2026. Source: ETFIQ.

0% of the two portfolios are the same securities at the same weight.

Alert

About each fund

DRAM

By weight, 16% of DRAM'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 56% of the fund across 12 positions, as filed for Jun 30, 2026. Since it first traded on Apr 2, 2026 the fund returned +95.0% with distributions reinvested. It sits 33.0% below its all-time high of Jun 22, 2026.

IDEF

By weight, 42% of IDEF's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 92%. The top ten holdings are 37% of the fund across 155 positions, as published by its issuer for Oct 27, 2026. Over the year to Oct 28, 2026 the fund returned −5.7% with distributions reinvested. It sits 17.0% below its all-time high of Mar 2, 2026.

Questions people ask

Do DRAM and IDEF hold the same stocks?: By their latest filings, 0% 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, DRAM or IDEF?: DRAM has 16% of its weight in S&P 500 names and IDEF has 42%, so DRAM differs more from the index.
Which is cheaper, DRAM or IDEF?: DRAM charges 0.65% a year and IDEF charges 0.55%, so IDEF is cheaper. Fees come from each fund's prospectus.

Other comparisons

DRAM vs ITA DRAM vs XAR DRAM vs SHLD DRAM vs PPA IDEF vs COPX IDEF vs SMH IDEF vs GCAD IDEF vs FOWF

Where to next

All thematic ETFs ranked by the S&P 500 Difference Score →How the scores are computed →DRAM on its own →IDEF on its own →DRAM holdings →IDEF dividend history →IDEF holdings →Method →Standards and sources →

Sources and dates

DRAM filings on SEC EDGAR ↗

DRAM prospectus with the expense ratio (SEC) ↗

Roundhill page for DRAM ↗

IDEF filings on SEC EDGAR ↗

IDEF prospectus with the expense ratio (SEC) ↗

iShares page for IDEF ↗

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, DRAM against IDEF, data as of Oct 28, 2026. https://etfiq.com/compare/themes/dram-vs-idef

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