VIOO vs SPSM: Holdings Overlap
VIOOVanguard S&P Small-cap 600 Index Fund
Vanguard · 603 holdings · $4.4B · as of 2026-05-31
SPSMState Street® SPDR® Portfolio S&P 600™ Small Cap ETF
State Street (SPDR) · 604 holdings · $17.3B · as of 2026-08-06
Holdings snapshots are 67 days apart (VIOO: 2026-05-31, SPSM: 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 VIOO and SPSM?
Vanguard S&P Small-cap 600 Index Fund (VIOO, by Vanguard) holds 603 positions; State Street® SPDR® Portfolio S&P 600™ Small Cap ETF (SPSM, by State Street (SPDR)) holds 604. 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
- 570VIOO holds 603 · SPSM holds 604
- Weight in Shared Holdings
- VIOO 94%·SPSM 93%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 VIOO
33 of 603 positions (5.5% of the fund) are not held by SPSM. Showing the top 30 by weight.
Only in SPSM
34 of 604 positions (6.6% of the fund) are not held by VIOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | VIOO | SPSM |
|---|---|---|
| Financials | 17.6% | 19.0% |
| Industrials | 17.2% | 17.4% |
| Information Technology | 15.9% | 12.8% |
| Consumer Discretionary | 12.9% | 13.9% |
| Health Care | 11.0% | 10.6% |
| Other Sectors | 25.2% | 25.1% |
| Unclassified | 0.0% | 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 VIOO, 1% of SPSM).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| VIOO | +2.4% | +24.4% | +36.3% | +14.6% | +7.7% | +10.9% | 1.09% |
| SPSM | +2.4% | +24.5% | +36.5% | +14.6% | +7.7% | +10.9% | 1.36% |
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 VIOO vs SPSM →
Shared Holdings(570)
The top 10 shared positions account for 5% of the overlap, led by VSAT, FORM and ESI.
 VSATViaSat, Inc. COM | 0.64% | 0.61% | 0.61% |
|---|---|---|---|
 FORMFormfactor Inc COM | 0.57% | 0.49% | 0.49% |
 ESIElement Solutions Inc COM | 0.57% | 0.48% | 0.48% |
 MTCHMatch Group Inc COM | 0.50% | 0.47% | 0.47% |
 EMNEastman Chemical Company COM | 0.51% | 0.46% | 0.46% |
 AGXArgan Inc COM | 0.54% | 0.45% | 0.45% |
 ESEESCO Technologies Inc. COM | 0.44% | 0.46% | 0.44% |
 JXNJackson Financial, Inc., Class A | 0.43% | 0.51% | 0.43% |
 RHPRyman Hospitality Properties Inc COM | 0.43% | 0.43% | 0.43% |
 QRVOQorvo Inc COM | 0.51% | 0.42% | 0.42% |
 ZWSZurn Elkay Water Solutions Corporation COM | 0.41% | 0.42% | 0.41% |
 RALRalliant Corp. COM | 0.41% | 0.40% | 0.40% |
 PAYCPaycom Software Inc COM | 0.40% | 0.49% | 0.40% |
 AWIArmstrong World Industries, Inc. COM | 0.40% | 0.43% | 0.40% |
 TRNOTerreno Realty Corporation COM | 0.40% | 0.40% | 0.40% |
 ETSYEtsy Inc COM | 0.39% | 0.43% | 0.39% |
 PLXSPlexus Corp COM | 0.42% | 0.39% | 0.39% |
 ECGEverus Construction Group Inc. COM | 0.45% | 0.39% | 0.39% |
 SNEXStoneX Group Inc COM | 0.47% | 0.39% | 0.39% |
 MSGSMadison Square Garden Sports Corp. CL A | 0.40% | 0.39% | 0.39% |
 CORTCorcept Therapeutics Inc. COM | 0.38% | 0.56% | 0.38% |
 FSSFederal Signal Corp. COM | 0.38% | 0.43% | 0.38% |
 NPOEnpro Inc COM | 0.38% | 0.39% | 0.38% |
 KMXCarmax Inc COM | 0.37% | 0.45% | 0.37% |
 ACAArcosa Inc COM | 0.37% | 0.39% | 0.37% |
Showing the top 250 of 570 shared holdings by overlap weight.
Frequently Asked Questions
How much do VIOO and SPSM overlap?
VIOO and SPSM overlap by 87.4% of portfolio weight. They share 570 holdings (VIOO holds 603 positions and SPSM holds 604), based on each fund's latest SEC-reported holdings.
Is it redundant to own both VIOO and SPSM?
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 VIOO and SPSM?
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 VIOO own that SPSM doesn't?
33 positions (5.5% of VIOO) are unique to VIOO, led by SANM, SMTC and VIAV. In the other direction, 34 positions (6.6% of SPSM) are unique to SPSM.