IWS vs VBK: Holdings Overlap
IWSiShares Russell Mid-Cap Value ETF
iShares · 712 holdings · $15.9B · as of 2026-03-31
VBKVanguard Small-cap Growth Index Fund
Vanguard · 551 holdings · $24.3B · as of 2026-03-31
How similar are IWS and VBK?
iShares Russell Mid-Cap Value ETF (IWS, by iShares) holds 712 positions; Vanguard Small-cap Growth Index Fund (VBK, by Vanguard) holds 551. They have 167 holdings in common, and by portfolio weight the two funds are 14.5% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 14.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 167IWS holds 712 · VBK holds 551
- Weight in Shared Holdings
- IWS 15%·VBK 49%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 IWS
545 of 712 positions (85.2% of the fund) are not held by VBK. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWS | VBK |
|---|---|---|
| Industrials | 17.1% | 24.6% |
| Information Technology | 12.3% | 21.6% |
| Health Care | 7.6% | 16.1% |
| Financials | 15.1% | 6.1% |
| Consumer Discretionary | 7.8% | 9.9% |
| Other Sectors | 39.6% | 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 IWS, 1% of VBK).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWS | +3.3% | +22.1% | +29.8% | +16.6% | +9.8% | +10.4% | 1.27% |
| 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 IWS vs VBK →
Shared Holdings(167)
The top 10 shared positions account for 23% of the overlap, led by CIEN, LITE and COHR.
 CIENCiena Corporation COM NEW | 0.56% | 0.92% | 0.56% |
|---|---|---|---|
 LITELumentum Holdings Inc. COM | 0.47% | 0.84% | 0.47% |
 COHRCoherent Corp COM | 0.42% | 0.74% | 0.42% |
 EQTEQT Corporation COM | 0.39% | 0.66% | 0.39% |
 FTITechnipFMC PLC USD1 | 0.28% | 0.92% | 0.28% |
 CWCurtiss-Wright Corporation | 0.26% | 0.84% | 0.26% |
 EXEExpand Energy Corp. COM | 0.25% | 0.44% | 0.25% |
 CASYCasey'S General Stores Inc. COM | 0.23% | 0.90% | 0.23% |
 WWDWoodward Inc. COM | 0.22% | 0.71% | 0.22% |
 HUBBHubbell Incorporated COM | 0.27% | 0.22% | 0.22% |
 RGLDRoyal Gold, Inc. COM | 0.22% | 0.72% | 0.22% |
 EMEEmcor Group Inc COM | 0.22% | 0.55% | 0.22% |
 ALBAlbemarle Corp COM | 0.21% | 0.35% | 0.21% |
 FSLRFirst Solar Inc COM | 0.20% | 0.34% | 0.20% |
 ATIATI Inc COM | 0.20% | 0.66% | 0.20% |
 NVTNVent Electric PLC COM USD0.01 | 0.19% | 0.64% | 0.19% |
 XPOXPO Inc COM | 0.18% | 0.36% | 0.18% |
 RBARB Global Inc COM | 0.17% | 0.59% | 0.17% |
 SOFISofi Technologies Inc COM | 0.17% | 0.68% | 0.17% |
 RVMDRevolution Medicines Inc COM | 0.17% | 0.61% | 0.17% |
 MTZMastec, Inc. COM | 0.16% | 0.68% | 0.16% |
 CRSCarpenter Technology Corporation COM | 0.16% | 0.62% | 0.16% |
 BWXTBWX Technologies Inc. COM | 0.16% | 0.62% | 0.16% |
 PTCPTC Inc COM | 0.15% | 0.57% | 0.15% |
 ENTGEntegris Inc COM | 0.15% | 0.59% | 0.15% |
Frequently Asked Questions
How much do IWS and VBK overlap?
IWS and VBK overlap by 14.5% of portfolio weight. They share 167 holdings (IWS holds 712 positions and VBK holds 551), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWS and VBK?
The two portfolios are 14.5% 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 IWS and VBK?
The largest positions held by both funds are CIEN, LITE, COHR, EQT and FTI. Together the top 10 shared positions account for 23% of the total overlap.
What does IWS own that VBK doesn't?
545 positions (85.2% of IWS) are unique to IWS, led by GLW, WDC and SNDK. In the other direction, 384 positions (50.8% of VBK) are unique to VBK.