IHI vs IWO: Holdings Overlap
IHIiShares U.S. Medical Devices ETF
iShares · 47 holdings · $3.4B · as of 2026-03-31
IWOiShares Russell 2000 Growth ETF
iShares · 1101 holdings · $14.8B · as of 2026-03-31
How similar are IHI and IWO?
iShares U.S. Medical Devices ETF (IHI, by iShares) holds 47 positions; iShares Russell 2000 Growth ETF (IWO, by iShares) holds 1101. They have 18 holdings in common, and by portfolio weight the two funds are 2.1% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 2.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 18IHI holds 47 · IWO holds 1101
- Weight in Shared Holdings
- IHI 4%·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 IHI
29 of 47 positions (95.4% of the fund) are not held by IWO.
Only in IWO
1083 of 1101 positions (97.8% of the fund) are not held by IHI. Showing the top 30 by weight.
Sector Breakdown
| Sector | IHI | IWO |
|---|---|---|
| Health Care | 99.8% | 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 | 0.1% | 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 (0% of IHI, 4% of IWO).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IHI | +4.1% | -12.3% | -9.9% | +0.5% | -2.6% | +8.9% | 0.45% |
| 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 IHI vs IWO →
Shared Holdings(18)
The top 10 shared positions account for 83% of the overlap, led by GKOS, IRTC and TMDX.
 GKOSGlaukos Corp. COM | 0.84% | 0.40% | 0.40% |
|---|---|---|---|
 IRTCiRhythm Holdings Inc. COM | 0.52% | 0.25% | 0.25% |
 TMDXTransMedics Group Inc. COM | 0.46% | 0.22% | 0.22% |
 ITGRInteger Holdings Corp. COM | 0.42% | 0.20% | 0.20% |
 LMATLemaitre Vascular Inc. COM | 0.31% | 0.15% | 0.15% |
 AXGNAxoGen Inc. COM | 0.22% | 0.11% | 0.11% |
 ATRCAtricure Inc COM | 0.19% | 0.09% | 0.09% |
 PRCTProcept Biorobotics Corp. COM | 0.19% | 0.09% | 0.09% |
 TNDMTandem Diabetes Care Inc COM NEW | 0.18% | 0.09% | 0.09% |
 AORTArtivion Inc COM | 0.21% | 0.09% | 0.09% |
 ATECAlphatec Holdings Inc. COM NEW | 0.17% | 0.09% | 0.09% |
 NVCRNovocure Ltd COM USD0.00 | 0.15% | 0.07% | 0.07% |
 BFLYButterfly Network, Inc., Class A | 0.11% | 0.05% | 0.05% |
 IRMDIradimed Corp. COM | 0.10% | 0.05% | 0.05% |
 SIBNSI-BONE Inc. COM | 0.07% | 0.03% | 0.03% |
 QDELQuidelOrtho Corp COM | 0.15% | 0.03% | 0.03% |
 BBNXBeta Bionics Inc. COM | 0.05% | 0.02% | 0.02% |
 ANGOAngiodynamics Inc COM | 0.06% | 0.01% | 0.01% |
Frequently Asked Questions
How much do IHI and IWO overlap?
IHI and IWO overlap by 2.1% of portfolio weight. They share 18 holdings (IHI holds 47 positions and IWO holds 1101), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IHI and IWO?
The two portfolios are 2.1% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IHI and IWO?
The largest positions held by both funds are GKOS, IRTC, TMDX, ITGR and LMAT. Together the top 10 shared positions account for 83% of the total overlap.
What does IHI own that IWO doesn't?
29 positions (95.4% of IHI) are unique to IHI, led by ABT, ISRG and SYK. In the other direction, 1083 positions (97.8% of IWO) are unique to IWO.