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ETF comparison

SPSM vs VOO

US Small Cap vs US Large Cap.

State Street SPDR Portfolio S&P 600 Small Cap ETF · Vanguard S&P 500 ETF

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

1 positions appear in both funds. Buying equal dollars of SPSM and VOO would leave roughly 0.0% of each dollar exposed to the same underlying securities.

SPSM unmatched 99.8% Shared 0.0% VOO unmatched 99.7%

Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.

In SPSM only
603 positions
Shared
1 positions
In VOO only
503 positions

Side by side

SPSM

State Street SPDR Portfolio S&P 600 Small Cap ETF

State Street · US Small Cap

96 composite / 100
Expense ratio
0.030%
Net assets
$15.66B
TTM yield
1.52%
Top-10 conc.
5.9%
VOO

Vanguard S&P 500 ETF

Vanguard · US Large Cap

91 composite / 100
Expense ratio
0.030%
Net assets
$1.73T
whole fund, 4 share classes
TTM yield
1.06%
Top-10 conc.
36.4%

Sub-score comparison

97
Cost
97
87
Tax efficiency
88
100
Liquidity
100
100
Concentration
62
—
Tracking quality
—
SPSM sub-score VOO

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

Expense ratios are effectively identical (0.030% vs 0.030%).

Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with SPSM vs VOO.

Top shared holdings

1 shared in total
# Holding In SPSM In VOO Overlap
1 Conagra Brands Inc 0.35% 0.01% 0.01%

Only in SPSM

603 total
  • FormFactor Inc 0.68%
  • Viasat Inc 0.66%
  • Molina Healthcare Inc 0.65%
  • Argan Inc 0.60%
  • BrightSpring Health Services Inc 0.60%
  • Element Solutions Inc 0.59%
  • MaxLinear Inc 0.58%
  • Krystal Biotech Inc 0.53%
  • ESCO Technologies Inc 0.49%
  • Match Group Inc 0.48%

Only in VOO

503 total
  • NVIDIA Corp 7.51%
  • Apple Inc 6.59%
  • Microsoft Corp 4.30%
  • Amazon.com Inc 3.62%
  • Alphabet Inc 3.25%
  • Broadcom Inc 2.77%
  • Alphabet Inc 2.59%
  • Micron Technology Inc 2.02%
  • Meta Platforms Inc 1.92%
  • Tesla Inc 1.84%

Related comparisons

More comparisons with SPSM

More comparisons with VOO

Percentages are holdings overlap with the named fund.

Open SPSM or VOO at a brokerage

Both funds trade commission-free at major US brokerages.

Open at Fidelity

Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.

Holdings overlap is the sum of min(weight_a, weight_b) over positions matched on ISIN (CUSIP fallback). Methodology: see /methodology/.

Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.