IVOO vs IWR: Holdings Overlap
IVOOVanguard S&P Mid-cap 400 Index Fund
Vanguard · 400 holdings · $3.9B · as of 2026-05-31
IWRiShares Russell Mid-Cap ETF
iShares · 806 holdings · $57.6B · as of 2026-03-31
Holdings snapshots are 61 days apart (IVOO: 2026-05-31, IWR: 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 IVOO and IWR?
Vanguard S&P Mid-cap 400 Index Fund (IVOO, by Vanguard) holds 400 positions; iShares Russell Mid-Cap ETF (IWR, by iShares) holds 806. They have 302 holdings in common, and by portfolio weight the two funds are 20.4% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 20.4%Sum of the smaller weight of each shared holding
- Shared Holdings
- 302IVOO holds 400 · IWR holds 806
- Weight in Shared Holdings
- IVOO 80%·IWR 20%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 IVOO
98 of 400 positions (19.4% of the fund) are not held by IWR. Showing the top 30 by weight.
Sector Breakdown
| Sector | IVOO | IWR |
|---|---|---|
| Industrials | 25.6% | 18.7% |
| Information Technology | 15.7% | 13.0% |
| Financials | 14.3% | 13.6% |
| Consumer Discretionary | 11.1% | 10.8% |
| Health Care | 8.7% | 9.2% |
| Other Sectors | 24.4% | 34.3% |
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 |
|---|---|---|---|---|---|---|---|
| IVOO | +3.1% | +18.5% | +26.0% | +14.6% | +9.0% | +11.2% | 1.14% |
| IWR | +2.9% | +18.1% | +23.0% | +16.4% | +8.5% | +11.6% | 1.12% |
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 IVOO vs IWR →
Shared Holdings(302)
The top 10 shared positions account for 9% of the overlap, led by FTI, UTHR and CW.
 FTITechnipFMC PLC USD1 | 0.79% | 0.22% | 0.22% |
|---|---|---|---|
 UTHRUnited Therapeutics Corporation COM | 0.68% | 0.20% | 0.20% |
 CWCurtiss-Wright Corporation | 0.79% | 0.20% | 0.20% |
 FLEXFlex Ltd. COM USD0.01 | 1.58% | 0.19% | 0.19% |
 XPOXPO Inc COM | 0.72% | 0.18% | 0.18% |
 RGLDRoyal Gold, Inc. COM | 0.52% | 0.17% | 0.17% |
 WWDWoodward Inc. COM | 0.59% | 0.17% | 0.17% |
 USFDUS Foods Holding Corp COM | 0.51% | 0.16% | 0.16% |
 BURLBurlington Stores Inc. COM | 0.57% | 0.16% | 0.16% |
 MTZMastec, Inc. COM | 0.66% | 0.16% | 0.16% |
 ATIATI Inc COM | 0.68% | 0.16% | 0.16% |
 CRSCarpenter Technology Corporation COM | 0.67% | 0.15% | 0.15% |
 ILMNIllumina Inc COM | 0.71% | 0.15% | 0.15% |
 NVTNVent Electric PLC COM USD0.01 | 0.77% | 0.15% | 0.15% |
 BWXTBWX Technologies Inc. COM | 0.51% | 0.15% | 0.15% |
 PEverpure, Inc., Class A | 0.71% | 0.15% | 0.15% |
 TWLOTwilio, Inc., Class A | 0.82% | 0.14% | 0.14% |
 RBARB Global Inc COM | 0.56% | 0.14% | 0.14% |
 ENTGEntegris Inc COM | 0.60% | 0.14% | 0.14% |
 AAAlcoa Corporation COM | 0.57% | 0.14% | 0.14% |
 OVVOvintiv Inc COM | 0.44% | 0.14% | 0.14% |
 RBCRBC Bearings Incorporated | 0.52% | 0.13% | 0.13% |
 THCTenet Healthcare Corporation COM NEW | 0.44% | 0.13% | 0.13% |
 ITTITT Inc COM | 0.48% | 0.13% | 0.13% |
 RSReliance Inc COM | 0.57% | 0.13% | 0.13% |
Showing the top 250 of 302 shared holdings by overlap weight.
Frequently Asked Questions
How much do IVOO and IWR overlap?
IVOO and IWR overlap by 20.4% of portfolio weight. They share 302 holdings (IVOO holds 400 positions and IWR holds 806), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IVOO and IWR?
The two portfolios are 20.4% 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 IVOO and IWR?
The largest positions held by both funds are FTI, UTHR, CW, FLEX and XPO. Together the top 10 shared positions account for 9% of the total overlap.
What does IVOO own that IWR doesn't?
98 positions (19.4% of IVOO) are unique to IVOO, led by STRL, FN and NXT. In the other direction, 504 positions (79.3% of IWR) are unique to IWR.