SPSM vs VIOO: Holdings Overlap
SPSMState Street® SPDR® Portfolio S&P 600™ Small Cap ETF
State Street (SPDR) · 604 holdings · $17.3B · as of 2026-08-06
VIOOVanguard S&P Small-cap 600 Index Fund
Vanguard · 603 holdings · $4.4B · as of 2026-05-31
Holdings snapshots are 67 days apart (SPSM: 2026-08-06, VIOO: 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 SPSM and VIOO?
State Street® SPDR® Portfolio S&P 600™ Small Cap ETF (SPSM, by State Street (SPDR)) holds 604 positions; Vanguard S&P Small-cap 600 Index Fund (VIOO, by Vanguard) holds 603. They have 570 holdings in common, and by portfolio weight the two funds are 87.4% identical. In practical terms the pair is essentially interchangeable, so holding both adds little diversification.
- Overlap by Weight
- 87.4%Sum of the smaller weight of each shared holding
- Shared Holdings
- 570SPSM holds 604 · VIOO holds 603
- Weight in Shared Holdings
- SPSM 93%·VIOO 94%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 SPSM
34 of 604 positions (6.6% of the fund) are not held by VIOO. Showing the top 30 by weight.
Only in VIOO
33 of 603 positions (5.5% of the fund) are not held by SPSM. Showing the top 30 by weight.
Sector Breakdown
| Sector | SPSM | VIOO |
|---|---|---|
| Financials | 19.0% | 17.6% |
| Industrials | 17.4% | 17.2% |
| Information Technology | 12.8% | 15.9% |
| Consumer Discretionary | 13.9% | 12.9% |
| Health Care | 10.6% | 11.0% |
| Other Sectors | 25.1% | 25.2% |
| Unclassified | 0.9% | 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 (1% of SPSM, 0% of VIOO).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| SPSM | +2.4% | +24.5% | +36.5% | +14.6% | +7.7% | +10.9% | 1.36% |
| VIOO | +2.4% | +24.4% | +36.3% | +14.6% | +7.7% | +10.9% | 1.09% |
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 SPSM vs VIOO →
Shared Holdings(570)
The top 10 shared positions account for 5% of the overlap, led by VSAT, FORM and ESI.
 VSATViaSat, Inc. COM | 0.61% | 0.64% | 0.61% |
|---|---|---|---|
 FORMFormfactor Inc COM | 0.49% | 0.57% | 0.49% |
 ESIElement Solutions Inc COM | 0.48% | 0.57% | 0.48% |
 MTCHMatch Group Inc COM | 0.47% | 0.50% | 0.47% |
 EMNEastman Chemical Company COM | 0.46% | 0.51% | 0.46% |
 AGXArgan Inc COM | 0.45% | 0.54% | 0.45% |
 ESEESCO Technologies Inc. COM | 0.46% | 0.44% | 0.44% |
 JXNJackson Financial, Inc., Class A | 0.51% | 0.43% | 0.43% |
 RHPRyman Hospitality Properties Inc COM | 0.43% | 0.43% | 0.43% |
 QRVOQorvo Inc COM | 0.42% | 0.51% | 0.42% |
 ZWSZurn Elkay Water Solutions Corporation COM | 0.42% | 0.41% | 0.41% |
 RALRalliant Corp. COM | 0.40% | 0.41% | 0.40% |
 PAYCPaycom Software Inc COM | 0.49% | 0.40% | 0.40% |
 AWIArmstrong World Industries, Inc. COM | 0.43% | 0.40% | 0.40% |
 TRNOTerreno Realty Corporation COM | 0.40% | 0.40% | 0.40% |
 ETSYEtsy Inc COM | 0.43% | 0.39% | 0.39% |
 PLXSPlexus Corp COM | 0.39% | 0.42% | 0.39% |
 ECGEverus Construction Group Inc. COM | 0.39% | 0.45% | 0.39% |
 SNEXStoneX Group Inc COM | 0.39% | 0.47% | 0.39% |
 MSGSMadison Square Garden Sports Corp. CL A | 0.39% | 0.40% | 0.39% |
 CORTCorcept Therapeutics Inc. COM | 0.56% | 0.38% | 0.38% |
 FSSFederal Signal Corp. COM | 0.43% | 0.38% | 0.38% |
 NPOEnpro Inc COM | 0.39% | 0.38% | 0.38% |
 KMXCarmax Inc COM | 0.45% | 0.37% | 0.37% |
 ACAArcosa Inc COM | 0.39% | 0.37% | 0.37% |
Showing the top 250 of 570 shared holdings by overlap weight.
Frequently Asked Questions
How much do SPSM and VIOO overlap?
SPSM and VIOO overlap by 87.4% of portfolio weight. They share 570 holdings (SPSM holds 604 positions and VIOO holds 603), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SPSM and VIOO?
The two portfolios are 87.4% 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 SPSM and VIOO?
The largest positions held by both funds are VSAT, FORM, ESI, MTCH and EMN. Together the top 10 shared positions account for 5% of the total overlap.
What does SPSM own that VIOO doesn't?
34 positions (6.6% of SPSM) are unique to SPSM, led by GTES, CAG and POOL. In the other direction, 33 positions (5.5% of VIOO) are unique to VIOO.