SPSM vs VOO: Holdings Overlap
SPSMState Street® SPDR® Portfolio S&P 600™ Small Cap ETF
State Street (SPDR) · 604 holdings · $17.3B · as of 2026-08-06
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
Holdings snapshots are 128 days apart (SPSM: 2026-08-06, VOO: 2026-03-31). 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 VOO?
State Street® SPDR® Portfolio S&P 600™ Small Cap ETF (SPSM, by State Street (SPDR)) holds 604 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 4 holdings in common, and by portfolio weight the two funds are 0.1% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 4SPSM holds 604 · VOO holds 504
- Weight in Shared Holdings
- SPSM 1%·VOO 0%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
600 of 604 positions (98.5% of the fund) are not held by VOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | SPSM | VOO |
|---|---|---|
| Information Technology | 12.8% | 32.7% |
| Financials | 19.0% | 12.4% |
| Industrials | 17.4% | 9.0% |
| Consumer Discretionary | 13.9% | 9.9% |
| Health Care | 10.6% | 9.5% |
| Other Sectors | 25.1% | 26.3% |
| 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 VOO).
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% |
| VOO | +3.4% | +14.0% | +23.7% | +21.3% | +13.4% | +15.4% | 1.03% |
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 VOO →
Shared Holdings(4)
The top 4 shared positions account for 93% of the overlap, led by CAG, EPAM and POOL.
Frequently Asked Questions
How much do SPSM and VOO overlap?
SPSM and VOO overlap by 0.1% of portfolio weight. They share 4 holdings (SPSM holds 604 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SPSM and VOO?
The two portfolios are 0.1% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of SPSM and VOO?
The largest positions held by both funds are CAG, EPAM, POOL and CPB. Together the top 4 shared positions account for 93% of the total overlap.
What does SPSM own that VOO doesn't?
600 positions (98.5% of SPSM) are unique to SPSM, led by VSAT, CORT and GKOS. In the other direction, 500 positions (99.7% of VOO) are unique to VOO.