IWO vs MDYV: Holdings Overlap
IWOiShares Russell 2000 Growth ETF
iShares · 1101 holdings · $14.8B · as of 2026-03-31
MDYVState Street® SPDR® S&P 400™ Mid Cap Value ETF
State Street (SPDR) · 297 holdings · $2.9B · as of 2026-08-06
Holdings snapshots are 128 days apart (IWO: 2026-03-31, MDYV: 2026-08-06). 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 IWO and MDYV?
iShares Russell 2000 Growth ETF (IWO, by iShares) holds 1101 positions; State Street® SPDR® S&P 400™ Mid Cap Value ETF (MDYV, by State Street (SPDR)) holds 297. They have 29 holdings in common, and by portfolio weight the two funds are 3.5% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 3.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 29IWO holds 1101 · MDYV holds 297
- Weight in Shared Holdings
- IWO 6%·MDYV 6%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 IWO
1072 of 1101 positions (93.5% of the fund) are not held by MDYV. Showing the top 30 by weight.
Only in MDYV
268 of 297 positions (93.5% of the fund) are not held by IWO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWO | MDYV |
|---|---|---|
| Industrials | 23.7% | 18.7% |
| Financials | 8.6% | 23.4% |
| Health Care | 23.1% | 4.1% |
| Information Technology | 19.0% | 8.3% |
| Consumer Discretionary | 7.3% | 12.5% |
| Other Sectors | 14.1% | 32.9% |
| Unclassified | 4.0% | 0.0% |
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 (4% of IWO, 0% of MDYV).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWO | +1.2% | +21.0% | +34.7% | +17.5% | +5.9% | +11.0% | 0.42% |
| MDYV | +3.1% | +15.2% | +23.9% | +12.9% | +9.2% | +10.6% | 1.64% |
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 IWO vs MDYV →
Shared Holdings(29)
The top 10 shared positions account for 60% of the overlap, led by NXT, SIGI and CBT.
 NXTNextpower Inc. CLASS A COM | 0.94% | 0.29% | 0.29% |
|---|---|---|---|
 SIGISelective Insurance Group Inc. COM | 0.27% | 0.33% | 0.27% |
 CBTCabot Corporation COM | 0.25% | 0.26% | 0.25% |
 SMTCSemtech Corporation COM | 0.48% | 0.21% | 0.21% |
 AHRAmerican Healthcare REIT Inc. COM SHS | 0.20% | 0.23% | 0.20% |
 SLABSilicon Laboratories, Inc. COM | 0.46% | 0.19% | 0.19% |
 TEXTerex Corporation COM | 0.19% | 0.42% | 0.19% |
 NOVTNovanta Inc COM | 0.29% | 0.17% | 0.17% |
 ANFAbercrombie & Fitch Co., Class A | 0.28% | 0.17% | 0.17% |
 BDCBelden Inc. COM | 0.30% | 0.15% | 0.15% |
 FFINFirst Financial Bankshares Inc COM | 0.27% | 0.15% | 0.15% |
 KNFKnife River Corp. COMMON STOCK | 0.31% | 0.13% | 0.13% |
 CVLTCommvault Systems Inc. COM | 0.23% | 0.12% | 0.12% |
 LNTHLantheus Holdings Inc COM | 0.33% | 0.12% | 0.12% |
 VLYValley National Bancorp. COM | 0.10% | 0.39% | 0.10% |
 HAEHaemonetics Corporation | 0.18% | 0.09% | 0.09% |
 EXPOExponent Inc COM | 0.22% | 0.09% | 0.09% |
 MMSMaximus Inc COM | 0.24% | 0.08% | 0.08% |
 BCOBrinks Company COM | 0.29% | 0.08% | 0.08% |
 GBCIGlacier Bancorp Inc. COM | 0.08% | 0.35% | 0.08% |
 MZTIMarzetti Company/The | 0.19% | 0.06% | 0.06% |
 ONBOld National Bancorp COM | 0.06% | 0.52% | 0.06% |
 CYTKCytokinetics Incorporated | 0.06% | 0.29% | 0.06% |
 UMBFUMB Financial Corporation | 0.05% | 0.59% | 0.05% |
 TCBITexas Capital Bancshares, Inc. COM | 0.04% | 0.13% | 0.04% |
Frequently Asked Questions
How much do IWO and MDYV overlap?
IWO and MDYV overlap by 3.5% of portfolio weight. They share 29 holdings (IWO holds 1101 positions and MDYV holds 297), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWO and MDYV?
The two portfolios are 3.5% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IWO and MDYV?
The largest positions held by both funds are NXT, SIGI, CBT, SMTC and AHR. Together the top 10 shared positions account for 60% of the total overlap.
What does IWO own that MDYV doesn't?
1072 positions (93.5% of IWO) are unique to IWO, led by BE, FN and CRDO. In the other direction, 268 positions (93.5% of MDYV) are unique to MDYV.