ACWI vs SPY: Holdings Overlap
iShares · 2308 holdings · $33.2B · as of 2026-04-30
SPYState Street® SPDR® S&P 500® ETF Trust
State Street (SPDR) · 504 holdings · $812.0B · as of 2026-08-06
Holdings snapshots are 98 days apart (ACWI: 2026-04-30, SPY: 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 ACWI and SPY?
iShares MSCI ACWI ETF (ACWI, by iShares) holds 2308 positions; State Street® SPDR® S&P 500® ETF Trust (SPY, by State Street (SPDR)) holds 504. They have 455 holdings in common, and by portfolio weight the two funds are 60.5% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 60.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 455ACWI holds 2308 · SPY holds 504
- Weight in Shared Holdings
- ACWI 60%·SPY 98%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 ACWI
1853 of 2308 positions (39.3% of the fund) are not held by SPY. Showing the top 30 by weight.
Sector Breakdown
| Sector | ACWI | SPY |
|---|---|---|
| Information Technology | 28.2% | 37.6% |
| Financials | 15.5% | 12.3% |
| Industrials | 10.3% | 8.8% |
| Communication Services | 8.8% | 9.7% |
| Consumer Discretionary | 8.7% | 9.3% |
| Other Sectors | 24.1% | 22.3% |
| Unclassified | 4.1% | 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 (4% of ACWI, 0% of SPY).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| ACWI | +3.2% | +14.8% | +25.0% | +20.4% | +11.3% | +12.8% | 1.39% |
| SPY | +3.4% | +14.0% | +23.7% | +21.2% | +13.3% | +15.3% | 0.97% |
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 ACWI vs SPY →
Shared Holdings(455)
The top 10 shared positions account for 39% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 4.88% | 8.00% | 4.88% |
|---|---|---|---|
 AAPLApple Inc. COM | 4.01% | 6.92% | 4.01% |
 MSFTMicrosoft Corp. COM | 2.90% | 5.60% | 2.90% |
 AMZNAmazon.com, Inc. COM | 2.57% | 4.02% | 2.57% |
 GOOGLAlphabet Inc. CAP STK CL A | 2.25% | 3.16% | 2.25% |
 AVGOBroadcom Inc COM | 1.89% | 3.00% | 1.89% |
 GOOGAlphabet Inc. CAP STK CL C | 1.87% | 2.54% | 1.87% |
 METAMeta Platforms, Inc., Class A | 1.34% | 1.95% | 1.34% |
 TSLATesla Inc COM | 1.09% | 1.36% | 1.09% |
 JPMJPMorgan Chase & Co. COM | 0.85% | 1.44% | 0.85% |
 LLYEli Lilly & Co. COM | 0.75% | 1.42% | 0.75% |
 BRK-BBerkshire Hathaway, Inc., Class B | 0.65% | 1.45% | 0.65% |
 MUMicron Technology Inc. COM | 0.59% | 1.50% | 0.59% |
 AMDAdvanced Micro Devices Inc. COM | 0.58% | 1.20% | 0.58% |
 WMTWalmart Inc COM | 0.58% | 0.74% | 0.58% |
 JNJJohnson & Johnson COM | 0.56% | 0.93% | 0.56% |
 VVisa, Inc., Class A | 0.55% | 0.93% | 0.55% |
 COSTCostco Wholesale Corporation COM | 0.45% | 0.63% | 0.45% |
 INTCIntel Corporation COM | 0.43% | 0.71% | 0.43% |
 MAMasterCard Incorporated CL A | 0.42% | 0.70% | 0.42% |
 CATCaterpillar Inc COM | 0.42% | 0.59% | 0.42% |
 NFLXNetflix, Inc. COM | 0.40% | 0.47% | 0.40% |
 ABBVAbbVie Inc. COM | 0.38% | 0.65% | 0.38% |
 CVXChevron Corp. COM | 0.37% | 0.53% | 0.37% |
 BACBank of America Corp. COM | 0.36% | 0.62% | 0.36% |
Showing the top 250 of 455 shared holdings by overlap weight.
Frequently Asked Questions
How much do ACWI and SPY overlap?
ACWI and SPY overlap by 60.5% of portfolio weight. They share 455 holdings (ACWI holds 2308 positions and SPY holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both ACWI and SPY?
The two portfolios are 60.5% identical by weight. Owning both mostly doubles down on the shared core rather than diversifying: the same large positions drive both funds.
What are the biggest shared holdings of ACWI and SPY?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 39% of the total overlap.
What does ACWI own that SPY doesn't?
1853 positions (39.3% of ACWI) are unique to ACWI, led by TSMWF, 005930 and XOM. In the other direction, 49 positions (2.3% of SPY) are unique to SPY.