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ETF comparison

ARKK vs QTUM

Both Thematic.

ARK Innovation ETF · Defiance Quantum ETF

Holdings overlap

Weighted by ISIN/CUSIP
9.8 %

10 positions appear in both funds. Buying equal dollars of ARKK and QTUM would leave roughly 9.8% of each dollar exposed to the same underlying securities.

ARKK unmatched 87.0% Shared 9.8% QTUM unmatched 89.4%

Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.

In ARKK only
34 positions
Shared
10 positions
In QTUM only
76 positions

Side by side

ARKK

ARK Innovation ETF

ARK · Thematic

56 composite / 100
Expense ratio
0.75%
Net assets
$7.92B
TTM yield
0.00%
Top-10 conc.
47.6%
QTUM

Defiance Quantum ETF

Defiance · Thematic

75 composite / 100
Expense ratio
0.40%
Net assets
$5.64B
TTM yield
1.03%
Top-10 conc.
16.9%

Sub-score comparison

25
Cost
60
78
Tax efficiency
76
96
Liquidity
89
46
Concentration
90
—
Tracking quality
—
ARKK sub-score QTUM

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

QTUM is 35 bps cheaper than ARKK. On a $100,000 position that's about $350/yr more in fees for ARKK.

Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with ARKK vs QTUM.

Top shared holdings

10 shared in total
# Holding In ARKK In QTUM Overlap
1 ADVANCED MICRO DEVICES INC 3.98% 1.36% 1.36%
2 TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD 1.13% 1.24% 1.13%
3 COREWEAVE INC 2.38% 1.11% 1.11%
4 BROADCOM INC 1.24% 1.08% 1.08%
5 AMAZON.COM INC 2.95% 1.06% 1.06%
6 NVIDIA CORP 1.94% 1.06% 1.06%
7 TERADYNE INC 0.96% 1.48% 0.96%
8 PALANTIR TECHNOLOGIES INC 3.11% 0.95% 0.95%
9 SNOWFLAKE INC 0.64% 1.13% 0.64%
10 ALPHABET INC 0.49% 1.07% 0.49%

Only in ARKK

34 total
  • TESLA INC 9.74%
  • TEMPUS AI INC 4.89%
  • SPACE EXPLORATION TECHNOLOGIES CORP 4.87%
  • CRISPR THERAPEUTICS AG 4.73%
  • SHOPIFY INC 4.36%
  • COINBASE GLOBAL INC 4.17%
  • CIRCLE INTERNET GROUP INC 3.90%
  • ROBINHOOD MARKETS INC 3.64%
  • TWIST BIOSCIENCE CORP 3.31%
  • 10X GENOMICS INC 3.30%

Only in QTUM

76 total
  • Arqit Quantum Inc 2.41%
  • Horizon Quantum Holdings LTD 2.38%
  • Quantinuum Inc 1.57%
  • Astera Labs Inc 1.55%
  • Applied Materials Inc 1.55%
  • KLA Corp 1.50%
  • MKS Inc 1.50%
  • Onto Innovation Inc 1.49%
  • Lam Research Corp 1.43%
  • Nebius Group NV 1.39%

Percentages are holdings overlap with the named fund.

Open ARKK or QTUM at a brokerage

Both funds trade commission-free at major US brokerages.

Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.

Holdings overlap is the sum of min(weight_a, weight_b) over positions matched on ISIN (CUSIP fallback). Methodology: see /methodology/.

Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.