IWR vs VIOG: Holdings Overlap
IWRiShares Russell Mid-Cap ETF
iShares · 806 holdings · $57.6B · as of 2026-03-31
VIOGVanguard S&P Small-cap 600 Growth Index Fund
Vanguard · 342 holdings · $1.1B · as of 2026-05-31
Holdings snapshots are 61 days apart (IWR: 2026-03-31, VIOG: 2026-05-31). 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 IWR and VIOG?
iShares Russell Mid-Cap ETF (IWR, by iShares) holds 806 positions; Vanguard S&P Small-cap 600 Growth Index Fund (VIOG, by Vanguard) holds 342. They have 29 holdings in common, and by portfolio weight the two funds are 0.9% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 29IWR holds 806 · VIOG holds 342
- Weight in Shared Holdings
- IWR 1%·VIOG 11%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 IWR
777 of 806 positions (98.8% of the fund) are not held by VIOG. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWR | VIOG |
|---|---|---|
| Industrials | 18.7% | 21.8% |
| Information Technology | 13.0% | 18.4% |
| Health Care | 9.2% | 14.7% |
| Financials | 13.6% | 14.2% |
| Consumer Discretionary | 10.8% | 10.8% |
| Other Sectors | 34.3% | 19.9% |
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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWR | +2.9% | +18.1% | +23.0% | +16.4% | +8.5% | +11.6% | 1.12% |
| VIOG | +1.1% | +25.9% | +33.8% | +15.2% | +6.8% | +11.2% | 0.75% |
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 IWR vs VIOG →
Shared Holdings(29)
The top 10 shared positions account for 53% of the overlap, led by ESI, AWI and QRVO.
 ESIElement Solutions Inc COM | 0.06% | 0.57% | 0.06% |
|---|---|---|---|
 AWIArmstrong World Industries, Inc. COM | 0.06% | 0.81% | 0.06% |
 QRVOQorvo Inc COM | 0.05% | 0.65% | 0.05% |
 ECGEverus Construction Group Inc. COM | 0.05% | 0.90% | 0.05% |
| Gates Industrial Corp PLC COM USD0.01 | 0.05% | 0.42% | 0.05% |
 MKTXMarketAxess Holdings Inc. COM | 0.04% | 0.31% | 0.04% |
 MSGSMadison Square Garden Sports Corp. CL A | 0.04% | 0.80% | 0.04% |
 LYFTLyft, Inc., Class A | 0.04% | 0.67% | 0.04% |
 RALRalliant Corp. COM | 0.04% | 0.43% | 0.04% |
 BFAMBright Horizons Family Solutions Inc Del COM | 0.04% | 0.28% | 0.04% |
 ETSYEtsy Inc COM | 0.04% | 0.79% | 0.04% |
 MRPMillrose Properties, Inc., Class A | 0.03% | 0.30% | 0.03% |
 CORTCorcept Therapeutics Inc. COM | 0.03% | 0.77% | 0.03% |
 AGOAssured Guaranty Ltd. COM USD0.01 | 0.03% | 0.20% | 0.03% |
 VIRTVirtu Financial, Inc., Class A | 0.03% | 0.47% | 0.03% |
 ADTADT Inc COM | 0.03% | 0.15% | 0.03% |
 CWENClearway Energy, Inc., Class C | 0.03% | 0.58% | 0.03% |
 WSCWillScot Holdings Corporation COM CL A | 0.02% | 0.29% | 0.02% |
 FRPTFreshpet Inc COM | 0.02% | 0.19% | 0.02% |
 RNGRingCentral, Inc., Class A | 0.02% | 0.23% | 0.02% |
 HAYWHayward Holdings Inc COM | 0.02% | 0.16% | 0.02% |
 IRDMIridium Communications, Inc. COM | 0.02% | 0.39% | 0.02% |
 TDCTeradata Corp COM | 0.02% | 0.21% | 0.02% |
 SRPTSarepta Therapeutics Inc COM | 0.02% | 0.14% | 0.02% |
 GTMZoominfo Technologies Inc COMMON STOCK | 0.01% | 0.06% | 0.01% |
Frequently Asked Questions
How much do IWR and VIOG overlap?
IWR and VIOG overlap by 0.9% of portfolio weight. They share 29 holdings (IWR holds 806 positions and VIOG holds 342), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWR and VIOG?
The two portfolios are 0.9% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IWR and VIOG?
The largest positions held by both funds are ESI, AWI, QRVO, ECG and Gates Industrial Corp PLC COM USD0.01. Together the top 10 shared positions account for 53% of the total overlap.
What does IWR own that VIOG doesn't?
777 positions (98.8% of IWR) are unique to IWR, led by GLW, VRT and HWM. In the other direction, 313 positions (88.7% of VIOG) are unique to VIOG.