ARKG vs IWM: Holdings Overlap
ARKGARK Genomic Revolution ETF
ARK · 32 holdings · $1.6B · as of 2026-04-30
iShares · 1941 holdings · $82.2B · as of 2026-03-31
Holdings snapshots are 30 days apart (ARKG: 2026-04-30, IWM: 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 IWM?
ARK Genomic Revolution ETF (ARKG, by ARK) holds 32 positions; iShares Russell 2000 ETF (IWM, by iShares) holds 1941. They have 22 holdings in common, and by portfolio weight the two funds are 1.3% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 1.3%Sum of the smaller weight of each shared holding
- Shared Holdings
- 22ARKG holds 32 · IWM holds 1941
- Weight in Shared Holdings
- ARKG 73%·IWM 1%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
10 of 32 positions (26.9% of the fund) are not held by IWM.
Sector Breakdown
| Sector | ARKG | IWM |
|---|---|---|
| Health Care | 93.3% | 16.6% |
| Industrials | 0.0% | 17.9% |
| Financials | 0.0% | 15.3% |
| Information Technology | 0.0% | 13.6% |
| Consumer Discretionary | 0.0% | 8.0% |
| Other Sectors | 0.0% | 22.7% |
| Unclassified | 6.3% | 5.5% |
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 IWM).
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% | — |
| IWM | +1.8% | +23.0% | +38.6% | +17.1% | +7.5% | +10.8% | 0.88% |
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 IWM →
Shared Holdings(22)
The top 10 shared positions account for 85% of the overlap, led by GH, 1CG and TWST.
 GHGuardant Health Inc COM | 3.49% | 0.39% | 0.39% |
|---|---|---|---|
 1CGCRISPR Therapeutics AG COM CHF0.03 | 8.91% | 0.15% | 0.15% |
 TWSTTwist Bioscience Corporation COM | 8.99% | 0.10% | 0.10% |
 VCYTVeracyte Inc COM | 2.66% | 0.09% | 0.09% |
 TXG10X Genomics, Inc., Class A | 5.77% | 0.08% | 0.08% |
 BEAMBeam Therapeutics Inc. COM | 5.43% | 0.08% | 0.08% |
 ADPTAdaptive Biotechnologies Corp COM | 2.42% | 0.07% | 0.07% |
 NRIXNurix Therapeutics Inc. COM | 2.33% | 0.05% | 0.05% |
 NTLAIntellia Therapeutics Inc COM | 3.82% | 0.05% | 0.05% |
 RXRXRecursion Pharmaceuticals, Inc., Class A | 3.51% | 0.05% | 0.05% |
 WGSGeneDx Holdings Corp., Class A | 2.04% | 0.04% | 0.04% |
 CDNACaredx Inc COM | 3.38% | 0.03% | 0.03% |
 BFLYButterfly Network, Inc., Class A | 1.89% | 0.03% | 0.03% |
 SDGRSchrodinger Inc/United States | 2.03% | 0.02% | 0.02% |
 ABSIAbsci Corp. COM | 4.78% | 0.01% | 0.01% |
 PACBPacific Biosciences Of California Inc. COM | 1.41% | 0.01% | 0.01% |
 PRMEPrime Medicine Inc COM | 1.41% | 0.01% | 0.01% |
 CERSCerus Corp COM | 1.22% | 0.01% | 0.01% |
 PSNLPersonalis, Inc. | 3.58% | 0.01% | 0.01% |
 ARCTArcturus Therapeutics Holdings Inc COM | 1.96% | 0.01% | 0.01% |
 MASS908 Devices Inc. COM | 1.08% | 0.01% | 0.01% |
 QSIQuantum Si Inc. COM CL A | 0.55% | 0.00% | 0.00% |
Frequently Asked Questions
How much do ARKG and IWM overlap?
ARKG and IWM overlap by 1.3% of portfolio weight. They share 22 holdings (ARKG holds 32 positions and IWM holds 1941), based on each fund's latest SEC-reported holdings.
Is it redundant to own both ARKG and IWM?
The two portfolios are 1.3% 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 IWM?
The largest positions held by both funds are GH, 1CG, TWST, VCYT and TXG. Together the top 10 shared positions account for 85% of the total overlap.
What does ARKG own that IWM doesn't?
10 positions (26.9% of ARKG) are unique to ARKG, led by TEM, NTRA and ILMN. In the other direction, 1919 positions (98.4% of IWM) are unique to IWM.