Data as of .
ARKK vs BAI: which is really different?
BAI holds 54.8% of its weight in S&P 500 companies and ARKK 38.1%.
ETFIQ Off-Index Score: ARKK scores higher
How much of it is not the index it is sold as an alternative to?
A percentile among the 371 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, ARKK and BAI hold 0% of their money in the same securities at the same weight.
| Only in ARKK | Only in BAI |
|---|---|
| TESLA INC 9.75% | MICRON TECHNOLOGY 6.48% |
| SPACE EXPLORATION TECHN-CL A 6.52% | NVIDIA 5.32% |
| CIRCLE INTERNET GROUP INC 5.56% | ADVANCED MICRO DEVICES 4.77% |
| TEMPUS AI INC-CL A 4.83% | BROADCOM INC 4.75% |
| CRISPR THERAPEUTICS AG 4.52% | TAIWAN SEMICONDUCTOR MANUFACTURING 4.69% |
| COINBASE GLOBAL INC -CLASS A 4.47% | LAM RESEARCH 4.06% |
| ROBINHOOD MARKETS INC - A 4.18% | SPACE EXPLORATION TECHNOLOGIES COR 3.01% |
| TWIST BIOSCIENCE CORP 3.29% | SNOWFLAKE 3.00% |
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 Sep 10, 2026 and Sep 11, 2026.
Performance, window by window
| Window | Total return | vs the S&P 500 | vs the Nasdaq-100 | |||
|---|---|---|---|---|---|---|
| ARKK | BAI | ARKK | BAI | ARKK | BAI | |
| 3 months | +10.5% | −9.1% | +7.2 pts | −12.3 pts | +11.3 pts | −8.3 pts |
| 6 months | +19.0% | +34.1% | +3.0 pts | +18.1 pts | −1.7 pts | +13.4 pts |
| 1 year | +6.7% | +32.3% | −10.8 pts | +14.8 pts | −16.2 pts | +9.3 pts |
| 3 years | +89.9% | not published | +12.0 pts | not published | −5.2 pts | not published |
| Since launch | +353.4% | +80.9% | −8.3 pts | +47.2 pts | −318.1 pts | +35.4 pts |
| ARKK ARK Innovation ETF Holds 47 stocks in broad innovation and megatrends, 38% of its weight in S&P 500 companies | BAI iShares A.I. Innovation and Tech Active ETF Holds 52 stocks in artificial intelligence, 55% of its weight in S&P 500 companies | |
|---|---|---|
| Issuer | ARK | iShares |
| Theme | Broad innovation and megatrends | Artificial intelligence |
| In the S&P 500 | 38.1% | 54.8% |
| Active share vs the S&P 500 | 85.0% | 76.5% |
| In the Nasdaq-100 | 28.6% | 49.5% |
| Holdings | 47 | 52 |
| Top ten, share of the fund | 49.4% | 41.8% |
| Expense ratio | 0.75% | 0.55% |
| Fee for the differing part | 0.88% | 0.72% |
| Total return, 1 year | +6.7% | +32.3% |
| vs the S&P 500 | −10.8 pts | +14.8 pts |
| vs the Nasdaq-100 | −16.2 pts | +9.3 pts |
| Below its high | −45.9% | −17.9% |
ARKK in plain words
By weight, 38% of ARKK's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 85%. The top ten holdings are 49% of the fund across 47 positions, as published by its issuer for Sep 11, 2026. Over the year to Sep 11, 2026 the fund returned +6.7% with distributions reinvested against +17.5% for the S&P 500, so a holder was behind by 10.8 pts. It sits 45.9% below its all-time high of Feb 12, 2021.
BAI in plain words
By weight, 55% of BAI's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 76%. The top ten holdings are 42% of the fund across 52 positions, as published by its issuer for Sep 10, 2026. Over the year to Sep 11, 2026 the fund returned +32.3% with distributions reinvested against +17.5% for the S&P 500, so a holder was ahead by 14.8 pts. It sits 17.9% below its all-time high of Jun 22, 2026.
Questions people ask
- Which is more different from the S&P 500, ARKK or BAI?
- ARKK has 38% of its weight in S&P 500 names and BAI has 55%, so ARKK differs more from the index.
- Which is cheaper, ARKK or BAI?
- ARKK charges 0.75% a year and BAI charges 0.55%, so BAI 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 BAI, data as of Sep 11, 2026. https://etfiq.com/compare/themes/arkk-vs-bai Free to use with attribution; the underlying files are at Open data.