Data as of .
ARKK vs FDFF: which is really different?
ARKK and FDFF hold 6% of their weight in the same names, and ARKK returned more over the year.
ETFIQ Off-Index Score: FDFF scores higher
How much of it is not the index it is sold as an alternative to?
A percentile among the 379 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
6% of the two portfolios are the same securities at the same weight.
What they hold in common
By the books each fund has filed, ARKK and FDFF hold 6% of their money in the same securities at the same weight.
| Holding | ARKK | FDFF |
|---|---|---|
| BLOCK INC | 2.28% | 4.17% |
| BULLISH | 2.26% | 0.29% |
| Only in ARKK | Only in FDFF |
|---|---|
| TESLA INC 9.26% | BLACKROCK INC 6.00% |
| SPACE EXPLORATION TECHN-CL A 6.37% | DBS GROUP HOLDINGS LTD 5.82% |
| TEMPUS AI INC-CL A 5.92% | CAPITAL ONE FINANCIAL CORP 5.43% |
| CIRCLE INTERNET GROUP INC 5.20% | BANKINTER SA 4.91% |
| COINBASE GLOBAL INC -CLASS A 4.67% | FINECOBANK SPA 4.52% |
| CRISPR THERAPEUTICS AG 4.64% | APOLLO GLOBAL MANAGEMENT, INC 4.47% |
| ROBINHOOD MARKETS INC - A 4.19% | VISA INC 4.33% |
| TWIST BIOSCIENCE CORP 3.95% | MASTERCARD INC 4.17% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated May 31, 2026 and Sep 21, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| ARKK | FDFF | ARKK | FDFF | ARKK | FDFF | |
| 3 months | +10.0% | +8.2% | +7.8 pts | +5.9 pts | +12.5 pts | +10.6 pts |
| 6 months | +27.6% | +16.3% | +9.6 pts | −1.8 pts | +3.4 pts | −8.0 pts |
| 1 year | +6.1% | −4.9% | −10.5 pts | −21.5 pts | −15.7 pts | −26.7 pts |
| 3 years | +112.5% | +41.4% | +34.1 pts | −37.0 pts | +14.4 pts | −56.7 pts |
| Since launch | +378.7% | +45.6% | +17.3 pts | −37.8 pts | −299.9 pts | −58.3 pts |
| ARKK ARK Innovation ETF Holds 46 stocks in broad innovation and megatrends, 36% of its weight in S&P 500 companies | FDFF Fidelity Disruptive Finance ETF Holds 45 stocks in broad innovation and megatrends, 45% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | ARK | Fidelity |
| Theme | Broad innovation and megatrends | Broad innovation and megatrends |
| In the S&P 500 | 36.2% | 45.1% |
| Active share vs the S&P 500 | 85.7% | 97.4% |
| In the Nasdaq-100 | 27.3% | 2.4% |
| Holdings | 46 | 45 |
| Top ten, share of the fund | 49.7% | 47.5% |
| Expense ratio | 0.75% | 0.50% |
| Fee for the differing part | 0.88% | 0.51% |
| Total return, 1 year | +6.1% | −4.9% |
| vs the S&P 500 | −10.5 pts | −21.5 pts |
| vs the Nasdaq-100 | −15.7 pts | −26.7 pts |
| Below its high | −42.9% | −8.3% |
| Net assets | $9.3bn | $47m |
ARKK in plain words
By weight, 36% of ARKK's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 86%. The top ten holdings are 50% of the fund across 46 positions, as published by its issuer for Sep 21, 2026. Over the year to Sep 18, 2026 the fund returned +6.1% with distributions reinvested against +16.6% for the S&P 500, so a holder was behind by 10.5 pts. It sits 42.9% below its all-time high of Feb 12, 2021.
FDFF in plain words
By weight, 45% of FDFF'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 48% of the fund across 45 positions, as filed for May 31, 2026. Over the year to Sep 18, 2026 the fund returned −4.9% with distributions reinvested against +16.6% for the S&P 500, so a holder was behind by 21.5 pts. It sits 8.3% below its all-time high of Jan 30, 2025.
Questions people ask
- Do ARKK and FDFF hold the same stocks?
- By their latest filings, 6% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.
- Which is more different from the S&P 500, ARKK or FDFF?
- ARKK has 36% of its weight in S&P 500 names and FDFF has 45%, so FDFF differs more from the index.
- Which is cheaper, ARKK or FDFF?
- ARKK charges 0.75% a year and FDFF charges 0.50%, so FDFF is cheaper. Fees come from each fund's prospectus.
Other comparisons
Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, ARKK against FDFF, data as of Sep 18, 2026. https://etfiq.com/compare/themes/arkk-vs-fdff Free to use with attribution; the underlying files are at Open data.