IWR vs VBK: Holdings Overlap
IWRiShares Russell Mid-Cap ETF
iShares · 806 holdings · $57.6B · as of 2026-03-31
VBKVanguard Small-cap Growth Index Fund
Vanguard · 551 holdings · $24.3B · as of 2026-03-31
How similar are IWR and VBK?
iShares Russell Mid-Cap ETF (IWR, by iShares) holds 806 positions; Vanguard Small-cap Growth Index Fund (VBK, by Vanguard) holds 551. They have 219 holdings in common, and by portfolio weight the two funds are 18.0% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 18.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 219IWR holds 806 · VBK holds 551
- Weight in Shared Holdings
- IWR 18%·VBK 64%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
587 of 806 positions (81.7% of the fund) are not held by VBK. Showing the top 30 by weight.
Only in VBK
332 of 551 positions (36.1% of the fund) are not held by IWR. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWR | VBK |
|---|---|---|
| Industrials | 18.7% | 24.6% |
| Information Technology | 13.0% | 21.6% |
| Health Care | 9.2% | 16.1% |
| Financials | 13.6% | 6.1% |
| Consumer Discretionary | 10.8% | 9.9% |
| Other Sectors | 34.3% | 20.6% |
| Unclassified | 0.1% | 0.9% |
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. “Unclassified” is weight we could not classify (0% of IWR, 1% of VBK).
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% |
| VBK | +1.8% | +19.6% | +29.4% | +16.6% | +5.3% | +11.4% | 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 IWR vs VBK →
Shared Holdings(219)
The top 10 shared positions account for 17% of the overlap, led by CIEN, LITE and FIX.
 CIENCiena Corporation COM NEW | 0.43% | 0.92% | 0.43% |
|---|---|---|---|
 LITELumentum Holdings Inc. COM | 0.39% | 0.84% | 0.39% |
 FIXComfort Systems USA Inc. COM | 0.38% | 0.81% | 0.38% |
 COHRCoherent Corp COM | 0.33% | 0.74% | 0.33% |
 EQTEQT Corporation COM | 0.30% | 0.66% | 0.30% |
 INSMInsmed Inc COM PAR $.01 | 0.27% | 0.59% | 0.27% |
 EMEEmcor Group Inc COM | 0.26% | 0.55% | 0.26% |
 RKLBRocket Lab Corp. COM | 0.25% | 0.61% | 0.25% |
 FTITechnipFMC PLC USD1 | 0.22% | 0.92% | 0.22% |
 TPLTexas Pacific Land Corporation COM | 0.22% | 0.46% | 0.22% |
 CASYCasey'S General Stores Inc. COM | 0.21% | 0.90% | 0.21% |
 NTRANatera Inc. COM | 0.21% | 0.88% | 0.21% |
 HUBBHubbell Incorporated COM | 0.21% | 0.22% | 0.21% |
 CWCurtiss-Wright Corporation | 0.20% | 0.84% | 0.20% |
 FTAIFTAI Aviation Ltd COM USD0.01 | 0.20% | 0.84% | 0.20% |
 EXEExpand Energy Corp. COM | 0.20% | 0.44% | 0.20% |
 XPOXPO Inc COM | 0.18% | 0.36% | 0.18% |
 RGLDRoyal Gold, Inc. COM | 0.17% | 0.72% | 0.17% |
 WWDWoodward Inc. COM | 0.17% | 0.71% | 0.17% |
 ALBAlbemarle Corp COM | 0.17% | 0.35% | 0.17% |
 BURLBurlington Stores Inc. COM | 0.16% | 0.34% | 0.16% |
 FSLRFirst Solar Inc COM | 0.16% | 0.34% | 0.16% |
 MTZMastec, Inc. COM | 0.16% | 0.68% | 0.16% |
 ATIATI Inc COM | 0.16% | 0.66% | 0.16% |
 SOFISofi Technologies Inc COM | 0.15% | 0.68% | 0.15% |
Frequently Asked Questions
How much do IWR and VBK overlap?
IWR and VBK overlap by 18.0% of portfolio weight. They share 219 holdings (IWR holds 806 positions and VBK holds 551), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWR and VBK?
The two portfolios are 18.0% 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 IWR and VBK?
The largest positions held by both funds are CIEN, LITE, FIX, COHR and EQT. Together the top 10 shared positions account for 17% of the total overlap.
What does IWR own that VBK doesn't?
587 positions (81.7% of IWR) are unique to IWR, led by GLW, VRT and HWM. In the other direction, 332 positions (36.1% of VBK) are unique to VBK.