ARKG vs XBI: Holdings Overlap
ARKGARK Genomic Revolution ETF
ARK · 32 holdings · $1.6B · as of 2026-04-30
XBIState Street® SPDR® S&P® Biotech ETF
State Street (SPDR) · 149 holdings · $10.0B · as of 2026-08-06
Holdings snapshots are 98 days apart (ARKG: 2026-04-30, XBI: 2026-08-06). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are ARKG and XBI?
ARK Genomic Revolution ETF (ARKG, by ARK) holds 32 positions; State Street® SPDR® S&P® Biotech ETF (XBI, by State Street (SPDR)) holds 149. They have 12 holdings in common, and by portfolio weight the two funds are 9.0% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 9.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 12ARKG holds 32 · XBI holds 149
- Weight in Shared Holdings
- ARKG 51%·XBI 9%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in ARKG
20 of 32 positions (48.5% of the fund) are not held by XBI.
Only in XBI
137 of 149 positions (91.0% of the fund) are not held by ARKG. Showing the top 30 by weight.
Sector Breakdown
| Sector | ARKG | XBI |
|---|---|---|
| Health Care | 93.3% | 95.5% |
| Other Sectors | 0.0% | 0.0% |
| Unclassified | 6.3% | 4.6% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts. “Unclassified” is weight we could not classify (6% of ARKG, 5% of XBI).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| ARKG | +1.0% | +48.6% | +84.8% | +9.2% | -13.0% | +9.2% | — |
| XBI | -4.0% | +29.2% | +85.3% | +26.3% | +4.5% | +9.5% | 0.36% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in ARKG vs XBI →
Shared Holdings(12)
The top 10 shared positions account for 94% of the overlap, led by TWST, NTRA and 1CG.
 TWSTTwist Bioscience Corporation COM | 8.99% | 1.56% | 1.56% |
|---|---|---|---|
 NTRANatera Inc. COM | 4.07% | 1.18% | 1.18% |
 1CGCRISPR Therapeutics AG COM CHF0.03 | 8.91% | 1.01% | 1.01% |
 BEAMBeam Therapeutics Inc. COM | 5.43% | 0.89% | 0.89% |
 IONSIonis Pharmaceuticals, Inc. COM | 1.74% | 0.72% | 0.72% |
 RXRXRecursion Pharmaceuticals, Inc., Class A | 3.51% | 0.68% | 0.68% |
 VCYTVeracyte Inc COM | 2.66% | 0.67% | 0.67% |
 NTLAIntellia Therapeutics Inc COM | 3.82% | 0.63% | 0.63% |
 NRIXNurix Therapeutics Inc. COM | 2.33% | 0.60% | 0.60% |
 CDNACaredx Inc COM | 3.38% | 0.50% | 0.50% |
 ABSIAbsci Corp. COM | 4.78% | 0.42% | 0.42% |
 PRMEPrime Medicine Inc COM | 1.41% | 0.15% | 0.15% |
Frequently Asked Questions
How much do ARKG and XBI overlap?
ARKG and XBI overlap by 9.0% of portfolio weight. They share 12 holdings (ARKG holds 32 positions and XBI holds 149), based on each fund's latest SEC-reported holdings.
Is it redundant to own both ARKG and XBI?
The two portfolios are 9.0% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of ARKG and XBI?
The largest positions held by both funds are TWST, NTRA, 1CG, BEAM and IONS. Together the top 10 shared positions account for 94% of the total overlap.
What does ARKG own that XBI doesn't?
20 positions (48.5% of ARKG) are unique to ARKG, led by TEM, TXG and ILMN. In the other direction, 137 positions (91.0% of XBI) are unique to XBI.