IWP vs VOO: Holdings Overlap
IWPiShares Russell Mid-Cap Growth ETF
iShares · 277 holdings · $20.5B · as of 2026-03-31
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
How similar are IWP and VOO?
iShares Russell Mid-Cap Growth ETF (IWP, by iShares) holds 277 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 86 holdings in common, and by portfolio weight the two funds are 5.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 5.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 86IWP holds 277 · VOO holds 504
- Weight in Shared Holdings
- IWP 60%·VOO 5%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 IWP
191 of 277 positions (39.9% of the fund) are not held by VOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWP | VOO |
|---|---|---|
| Information Technology | 15.6% | 32.7% |
| Industrials | 24.4% | 9.0% |
| Consumer Discretionary | 21.2% | 9.9% |
| Health Care | 14.9% | 9.5% |
| Financials | 8.5% | 12.4% |
| Other Sectors | 15.3% | 26.3% |
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 |
|---|---|---|---|---|---|---|---|
| IWP | +1.5% | +5.4% | +3.1% | +14.6% | +5.1% | +12.1% | 0.34% |
| VOO | +3.4% | +14.0% | +23.7% | +21.3% | +13.4% | +15.4% | 1.03% |
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 IWP vs VOO →
Shared Holdings(86)
The top 10 shared positions account for 27% of the overlap, led by VRT, HWM and PWR.
 VRTVertiv Holdings Co., Class A | 3.43% | 0.17% | 0.17% |
|---|---|---|---|
 HWMHowmet Aerospace Inc COM | 3.32% | 0.17% | 0.17% |
 PWRQuanta Services, Inc. COM | 2.25% | 0.15% | 0.15% |
 BNYThe Bank of New York Mellon Corp. COM | 0.21% | 0.15% | 0.15% |
 PSXPhillips 66 COM | 0.19% | 0.13% | 0.13% |
 ROSTRoss Stores Inc COM | 0.50% | 0.13% | 0.13% |
 HLTHilton Worldwide Holdings Inc COM | 2.49% | 0.12% | 0.12% |
 RCLRoyal Caribbean Group COM USD0.01 | 2.51% | 0.12% | 0.12% |
 CORCencora Inc COM | 2.07% | 0.11% | 0.11% |
 SPGSimon Property Group Inc COM | 0.48% | 0.11% | 0.11% |
 HOODRobinhood Markets, Inc., Class A | 0.25% | 0.10% | 0.10% |
 TRGPTarga Resources Corp. COM | 1.92% | 0.10% | 0.10% |
 FASTFastenal Co. COM | 1.57% | 0.10% | 0.10% |
 MPWRMonolithic Power Systems Inc. COM | 1.82% | 0.10% | 0.10% |
 LITELumentum Holdings Inc. COM | 0.13% | 0.09% | 0.09% |
 CAHCardinal Health, Inc. COM | 0.91% | 0.09% | 0.09% |
 FIXComfort Systems USA Inc. COM | 1.73% | 0.09% | 0.09% |
 VSTVistra Corp. COMMON STOCK | 1.83% | 0.09% | 0.09% |
 GWWW.w. Grainger Inc. COM | 1.46% | 0.09% | 0.09% |
 IDXXIDEXX Laboratories Inc. COM | 1.61% | 0.08% | 0.08% |
 CVNACarvana Co., Class A | 1.53% | 0.08% | 0.08% |
 YUMYum! Brands Inc. COM | 0.52% | 0.08% | 0.08% |
 AMPAmeriprise Financial, Inc. COM | 1.32% | 0.07% | 0.07% |
 ROKRockwell Automation, Inc. COM | 0.12% | 0.07% | 0.07% |
 MSCIMSCI Inc. COM | 0.68% | 0.07% | 0.07% |
Frequently Asked Questions
How much do IWP and VOO overlap?
IWP and VOO overlap by 5.0% of portfolio weight. They share 86 holdings (IWP holds 277 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWP and VOO?
The two portfolios are 5.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IWP and VOO?
The largest positions held by both funds are VRT, HWM, PWR, BNY and PSX. Together the top 10 shared positions account for 27% of the total overlap.
What does IWP own that VOO doesn't?
191 positions (39.9% of IWP) are unique to IWP, led by NET, ALNY and RBLX. In the other direction, 418 positions (94.8% of VOO) are unique to VOO.