SPMD vs IVOO: Holdings Overlap
SPMDState Street® SPDR® Portfolio S&P 400™ Mid Cap ETF
State Street (SPDR) · 399 holdings · $18.5B · as of 2026-08-06
IVOOVanguard S&P Mid-cap 400 Index Fund
Vanguard · 400 holdings · $3.9B · as of 2026-05-31
Holdings snapshots are 67 days apart (SPMD: 2026-08-06, IVOO: 2026-05-31). 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 SPMD and IVOO?
State Street® SPDR® Portfolio S&P 400™ Mid Cap ETF (SPMD, by State Street (SPDR)) holds 399 positions; Vanguard S&P Mid-cap 400 Index Fund (IVOO, by Vanguard) holds 400. They have 387 holdings in common, and by portfolio weight the two funds are 91.3% identical. In practical terms the pair is essentially interchangeable, so holding both adds little diversification.
- Overlap by Weight
- 91.3%Sum of the smaller weight of each shared holding
- Shared Holdings
- 387SPMD holds 399 · IVOO holds 400
- Weight in Shared Holdings
- SPMD 102%·IVOO 96%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 SPMD
12 of 399 positions (4.0% of the fund) are not held by IVOO.
Sector Breakdown
| Sector | SPMD | IVOO |
|---|---|---|
| Industrials | 26.0% | 25.6% |
| Financials | 16.1% | 14.3% |
| Information Technology | 15.7% | 15.7% |
| Consumer Discretionary | 11.7% | 11.1% |
| Health Care | 10.3% | 8.7% |
| Other Sectors | 25.8% | 24.4% |
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 |
|---|---|---|---|---|---|---|---|
| SPMD | +3.1% | +18.5% | +26.0% | +14.6% | +9.1% | +11.3% | 1.19% |
| IVOO | +3.1% | +18.5% | +26.0% | +14.6% | +9.0% | +11.2% | 1.14% |
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 SPMD vs IVOO →
Shared Holdings(387)
The top 10 shared positions account for 8% of the overlap, led by TWLO, FTI and NVT.
 TWLOTwilio, Inc., Class A | 0.81% | 0.82% | 0.81% |
|---|---|---|---|
 FTITechnipFMC PLC USD1 | 0.76% | 0.79% | 0.76% |
 NVTNVent Electric PLC COM USD0.01 | 0.73% | 0.77% | 0.73% |
 CWCurtiss-Wright Corporation | 0.73% | 0.79% | 0.73% |
 PEverpure, Inc., Class A | 0.76% | 0.71% | 0.71% |
 ILMNIllumina Inc COM | 0.81% | 0.71% | 0.71% |
 ATIATI Inc COM | 0.84% | 0.68% | 0.68% |
 CRSCarpenter Technology Corporation COM | 0.76% | 0.67% | 0.67% |
 XPOXPO Inc COM | 0.63% | 0.72% | 0.63% |
 UTHRUnited Therapeutics Corporation COM | 0.62% | 0.68% | 0.62% |
 ENTGEntegris Inc COM | 0.60% | 0.60% | 0.60% |
 OKTAOkta Inc. Class A | 0.66% | 0.60% | 0.60% |
 WWDWoodward Inc. COM | 0.60% | 0.59% | 0.59% |
 BURLBurlington Stores Inc. COM | 0.64% | 0.57% | 0.57% |
 AAAlcoa Corporation COM | 0.68% | 0.57% | 0.57% |
 RSReliance Inc COM | 0.59% | 0.57% | 0.57% |
 MTSIMACOM Technology Solutions Holdings Inc. COM | 0.54% | 0.67% | 0.54% |
 MKSIMKS Inc. COM | 0.54% | 0.62% | 0.54% |
 FNFabrinet COM USD0.01 | 0.54% | 0.67% | 0.54% |
 SNXTD SYNNEX Corporation | 0.53% | 0.56% | 0.53% |
 USFDUS Foods Holding Corp COM | 0.65% | 0.51% | 0.51% |
 WCCWesco International, Inc. COM | 0.50% | 0.50% | 0.50% |
 RBCRBC Bearings Incorporated | 0.49% | 0.52% | 0.49% |
 RGLDRoyal Gold, Inc. COM | 0.49% | 0.52% | 0.49% |
 LSCCLattice Semiconductor Corporation COM | 0.48% | 0.57% | 0.48% |
Showing the top 250 of 387 shared holdings by overlap weight.
Frequently Asked Questions
How much do SPMD and IVOO overlap?
SPMD and IVOO overlap by 91.3% of portfolio weight. They share 387 holdings (SPMD holds 399 positions and IVOO holds 400), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SPMD and IVOO?
The two portfolios are 91.3% identical by weight. Owning both is largely redundant: they are close to the same portfolio, so a second position mostly duplicates the first.
What are the biggest shared holdings of SPMD and IVOO?
The largest positions held by both funds are TWLO, FTI, NVT, CW and P. Together the top 10 shared positions account for 8% of the total overlap.
What does SPMD own that IVOO doesn't?
12 positions (4.0% of SPMD) are unique to SPMD, led by SMTC, ROKU and TOST. In the other direction, 13 positions (3.4% of IVOO) are unique to IVOO.