ARKG vs IWO: Holdings Overlap
ARKGARK Genomic Revolution ETF
ARK · 32 holdings · $1.6B · as of 2026-04-30
IWOiShares Russell 2000 Growth ETF
iShares · 1101 holdings · $14.8B · as of 2026-03-31
Holdings snapshots are 30 days apart (ARKG: 2026-04-30, IWO: 2026-03-31). 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 IWO?
ARK Genomic Revolution ETF (ARKG, by ARK) holds 32 positions; iShares Russell 2000 Growth ETF (IWO, by iShares) holds 1101. They have 15 holdings in common, and by portfolio weight the two funds are 1.9% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 1.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 15ARKG holds 32 · IWO holds 1101
- Weight in Shared Holdings
- ARKG 51%·IWO 2%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
17 of 32 positions (48.9% of the fund) are not held by IWO.
Only in IWO
1086 of 1101 positions (98.0% of the fund) are not held by ARKG. Showing the top 30 by weight.
Sector Breakdown
| Sector | ARKG | IWO |
|---|---|---|
| Health Care | 93.3% | 23.1% |
| Industrials | 0.0% | 23.7% |
| Information Technology | 0.0% | 19.0% |
| Financials | 0.0% | 8.6% |
| Consumer Discretionary | 0.0% | 7.3% |
| Other Sectors | 0.0% | 14.1% |
| Unclassified | 6.3% | 4.0% |
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, 4% of IWO).
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% | — |
| IWO | +1.2% | +21.0% | +34.7% | +17.5% | +5.9% | +11.0% | 0.42% |
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 IWO →
Shared Holdings(15)
The top 10 shared positions account for 95% of the overlap, led by GH, TWST and VCYT.
 GHGuardant Health Inc COM | 3.49% | 0.77% | 0.77% |
|---|---|---|---|
 TWSTTwist Bioscience Corporation COM | 8.99% | 0.19% | 0.19% |
 VCYTVeracyte Inc COM | 2.66% | 0.17% | 0.17% |
 BEAMBeam Therapeutics Inc. COM | 5.43% | 0.15% | 0.15% |
 ADPTAdaptive Biotechnologies Corp COM | 2.42% | 0.14% | 0.14% |
 RXRXRecursion Pharmaceuticals, Inc., Class A | 3.51% | 0.09% | 0.09% |
 WGSGeneDx Holdings Corp., Class A | 2.04% | 0.08% | 0.08% |
 CDNACaredx Inc COM | 3.38% | 0.06% | 0.06% |
 BFLYButterfly Network, Inc., Class A | 1.89% | 0.05% | 0.05% |
 SDGRSchrodinger Inc/United States | 2.03% | 0.04% | 0.04% |
 TXG10X Genomics, Inc., Class A | 5.77% | 0.04% | 0.04% |
 CERSCerus Corp COM | 1.22% | 0.02% | 0.02% |
 ABSIAbsci Corp. COM | 4.78% | 0.02% | 0.02% |
 MASS908 Devices Inc. COM | 1.08% | 0.01% | 0.01% |
 ARCTArcturus Therapeutics Holdings Inc COM | 1.96% | 0.01% | 0.01% |
Frequently Asked Questions
How much do ARKG and IWO overlap?
ARKG and IWO overlap by 1.9% of portfolio weight. They share 15 holdings (ARKG holds 32 positions and IWO holds 1101), based on each fund's latest SEC-reported holdings.
Is it redundant to own both ARKG and IWO?
The two portfolios are 1.9% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of ARKG and IWO?
The largest positions held by both funds are GH, TWST, VCYT, BEAM and ADPT. Together the top 10 shared positions account for 95% of the total overlap.
What does ARKG own that IWO doesn't?
17 positions (48.9% of ARKG) are unique to ARKG, led by TEM, 1CG and NTRA. In the other direction, 1086 positions (98.0% of IWO) are unique to IWO.