How much do SPY and VOO overlap?

The weighted-overlap result uses the smaller portfolio weight for each reliably matched shared holding. Review the data timestamp and coverage states with the percentage.

Is SPY or VOO more diversified?

Diversification cannot be decided from the shared-holding count alone. Compare unique holdings, concentration, sector, country, and market-cap-style exposure together.

Should I own both SPY and VOO?

That depends on whether the duplicated exposure is intentional. The 50/50 portfolio view shows how much of a combined allocation is shared, but it is not personalized investment advice.

How many holdings do SPY and VOO share?

SPY and VOO share 503 reliably matched holdings in the stored snapshots. Check both provider dates and identified coverage before treating the count as complete.

Can AI predict whether SPY or VOO will perform better?

No. AI cannot predict whether SPY or VOO will perform better. This page measures current holdings exposure and does not compare future returns or recommend a winner.

ETF Overlap Tool

SPY vs VOO ETF Overlap

Snapshot overlap answer

SPY and VOO share 503 matched holdings in the stored snapshots. Their weighted holdings overlap is 94.7%. SPY has 99.7% in common holdings, while VOO has 99.8%. The holdings dates are Jul 29, 2026 and Jul 29, 2026.

Compare ETF holdings

Enter two different ETF tickers. The base comparison uses a 50% and 50% model, which you can change after the result loads.

Examples: VOO and VTI, QQQ and VGT, or SCHD and VYM.

Data dates and coverage

Complete

Each ETF keeps its own FMP update time. Pineify does not replace different timestamps with a single date. Result retrieved Jul 30, 2026, 05:02 AM UTC.

SPY: Updated Jul 29, 2026, 05:07 PM UTC; Identified coverage: 100.0%; Positive long weight: 100.0%. Identified long: 100.0%.; Signed source weight: 100.0%. Unmatched long: 0.0%.
VOO: Updated Jul 29, 2026, 08:07 PM UTC; Identified coverage: 100.0%; Positive long weight: 100.0%. Identified long: 100.0%.; Signed source weight: 100.0%. Unmatched long: 0.0%.

Shared holdings: 503; Resolved holding identities present in both ETF snapshots.
Weighted overlap: 94.7%; Sum of the smaller weight for each shared holding.
SPY common exposure: 99.7%; Share of SPY invested in holdings that also appear in VOO.
VOO common exposure: 99.8%; Share of VOO invested in holdings that also appear in SPY.

Top shared holdings

Ranked by the smaller weight contributed by the two ETFs.

Complete

Shared holdings for SPY and VOO
Holding	SPY weight	VOO weight	Overlap slice
NVDANVIDIA CORP	7.45%	7.51%	7.45%
AAPLAPPLE INC	7.80%	6.59%	6.59%
MSFTMICROSOFT CORP	4.56%	4.30%	4.30%
AMZNAMAZON.COM INC	3.53%	3.62%	3.53%
GOOGLALPHABET INC CL A	3.06%	3.25%	3.06%
AVGOBROADCOM INC	2.82%	2.77%	2.77%
GOOGALPHABET INC CL C	2.45%	2.59%	2.45%
METAMETA PLATFORMS INC CLASS A	2.03%	1.92%	1.92%
LLYELI LILLY + CO	1.51%	1.47%	1.47%
MUMICRON TECHNOLOGY INC	1.45%	2.02%	1.45%
BRK-BBERKSHIRE HATHAWAY INC CL B	1.47%	1.42%	1.42%
TSLATESLA INC	1.35%	1.84%	1.35%
JPMJPMORGAN CHASE + CO	1.50%	1.26%	1.26%
AMDADVANCED MICRO DEVICES	1.16%	1.47%	1.16%
JNJJOHNSON + JOHNSON	1.00%	0.95%	0.95%

Top unique holdings

These resolved holdings appear on one side of the current snapshots, not both.

Unique to SPY

No tickerUS DOLLAR0.29%
No tickerCONTRA HOLOGIC INCORPO0.00%

Unique to VOO

No tickerMKTLIQ 12/31/20490.21%
No tickerUS Dollar0.01%
No tickerSLBBH11420.01%
HO1.DEHOLOGIC INC - CVR (APRIL 2026)0.00%
CAGConagra Brands Inc0.00%
ABMDABIOMED INC-CVR0.00%

Sector overlap

Sector weights are compared by normalized provider labels. Unknown weight is not reassigned.

98.2%Complete

SPY classification coverage: Classified ratio: 100.0%. Unknown weight: 0.0%.
VOO classification coverage: Classified ratio: 100.0%. Unknown weight: 0.0%.

Sector overlap for SPY and VOO
Bucket	SPY	VOO	Overlap
Information Technology	38.42%	38.61%	38.42%
Financials	12.15%	11.41%	11.41%
Communication Services	9.23%	9.91%	9.23%
Health Care	9.07%	8.90%	8.90%
Consumer Discretionary	8.76%	9.51%	8.76%
Industrials	8.29%	8.46%	8.29%
Consumer Staples	4.55%	4.53%	4.53%
Energy	3.38%	2.98%	2.98%
Utilities	2.26%	2.20%	2.20%
Real Estate	1.90%	1.83%	1.83%
Materials	1.69%	1.66%	1.66%
Cash & Others	0.30%	0.00%	0.00%

Country overlap

Country exposure uses the current provider classification for each ETF.

99.8%Complete

SPY classification coverage: Classified ratio: 100.0%. Unknown weight: 0.0%.
VOO classification coverage: Classified ratio: 100.0%. Unknown weight: 0.0%.

Country overlap for SPY and VOO
Bucket	SPY	VOO	Overlap
United States	97.26%	97.12%	97.12%
Ireland	1.15%	1.12%	1.12%
United Kingdom	0.45%	0.45%	0.45%
Singapore	0.32%	0.33%	0.32%
Other	0.30%	0.47%	0.30%
Switzerland	0.31%	0.30%	0.30%
Netherlands	0.11%	0.11%	0.11%
Bermuda	0.08%	0.07%	0.07%
Canada	0.02%	0.02%	0.02%

Market-cap style overlap

Applicable equity holdings are grouped by Pineify v1 market-cap thresholds. Bonds, cash, and derivatives are excluded.

98.9%Complete

SPY classification coverage: Classified ratio: 100.0%. Unknown weight: 0.0%.
VOO classification coverage: Classified ratio: 100.0%. Unknown weight: 0.0%.

Market-cap style overlap for SPY and VOO
Bucket	SPY	VOO	Overlap
Large cap	99.59%	98.78%	98.78%
Mid cap	0.12%	0.12%	0.12%
Unclassified	0.00%	0.00%	0.00%

Model your whole-portfolio exposure

Enter each ETF as a share of the whole portfolio. Pineify keeps any remainder unmodeled and does not rescale the inputs.

SPY allocation (%)VOO allocation (%)

0% remains outside this two-ETF model.

Shared exposure: 99.7%; Combined exposure to holdings present in both ETFs.
Duplicate slice: 47.3%; The smaller scaled position for every shared holding.
Unmodeled remainder: 0.0%; Portfolio weight outside the two entered ETFs.

Method

Weighted overlap is the sum of the smaller holding weight for every matched security.
Pineify retains valid ISIN, CUSIP, and symbol aliases. Matching proceeds in stages and only accepts unique, non-conflicting identities. Names are not fuzzy matched.
Common exposure is calculated separately for each ETF. It is not the same metric as weighted overlap.
Negative weights are reported separately and excluded from the long-only overlap calculation.
Market-cap style uses Pineify methodology v1: small below $2 billion, mid from $2 billion to below $10 billion, and large at $10 billion or more. Market-cap data older than seven days is stale and the affected weight remains unclassified.

Methodology version: holdings-overlap-v1

Sources and warnings

FMP etf-holdings for SPYProvider time: Jul 29, 2026, 05:07 PM UTC. Retrieved Jul 30, 2026, 05:02 AM UTC.
FMP etf-info for SPYProvider time: Jul 30, 2026, 12:27 AM UTC. Retrieved Jul 30, 2026, 05:02 AM UTC.
FMP etf-sector-weightings for SPYProvider time: No provider timestamp. Retrieved Jul 30, 2026, 05:02 AM UTC.
FMP etf-country-weightings for SPYProvider time: No provider timestamp. Retrieved Jul 30, 2026, 05:02 AM UTC.
FMP etf-holdings for VOOProvider time: Jul 29, 2026, 08:07 PM UTC. Retrieved Jul 30, 2026, 05:02 AM UTC.
FMP etf-info for VOOProvider time: Jul 30, 2026, 01:55 AM UTC. Retrieved Jul 30, 2026, 05:02 AM UTC.
FMP etf-sector-weightings for VOOProvider time: No provider timestamp. Retrieved Jul 30, 2026, 05:02 AM UTC.
FMP etf-country-weightings for VOOProvider time: No provider timestamp. Retrieved Jul 30, 2026, 05:02 AM UTC.
FMP market-capitalization-batchProvider time: No provider timestamp. Retrieved Jul 30, 2026, 05:02 AM UTC.

Data notes

Some positive holding weight did not have a reliable security identity.
Holding tables show the highest-weight rows; calculations use every resolved holding.
2 market-cap observations were too old for current style classification.
The two ETF holdings snapshots have different FMP update times.

What this SPY and VOO result means

Holding count and weight answer different questions

The shared count shows how many resolved holding identities appear on both sides. Weighted overlap shows how much of the smaller position lines up for each shared security.

This is not a performance comparison

The page does not compare fees, liquidity, tracking error, taxes, or historical returns. Use those factors in a separate fund review before making an investment decision.

Published pair pages

Open the ETF Overlap tool

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ETF overlap questions

A next step after overlap

Put the duplicate exposure in research context

ETF overlap explains portfolio composition. Finance Agent can help you inspect the funds, sectors, and holdings behind the result. It does not turn overlap into a buy or sell recommendation.

Research with Finance Agent Open portfolio analysis

Pineify ETF Overlap is an information tool, not investment advice. The analysis does not compare fees, liquidity, past performance, or expected returns, and it does not recommend one ETF over another. Data can be incomplete or delayed. No tool or AI system can predict ETF prices or guarantee a return.