SOXX vs SPY: Holdings Overlap
iShares · 30 holdings · $47.6B · as of 2026-03-31
SPYState Street® SPDR® S&P 500® ETF Trust
State Street (SPDR) · 504 holdings · $812.0B · as of 2026-08-06
Holdings snapshots are 128 days apart (SOXX: 2026-03-31, 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 SOXX and SPY?
iShares Semiconductor ETF (SOXX, by iShares) holds 30 positions; State Street® SPDR® S&P 500® ETF Trust (SPY, by State Street (SPDR)) holds 504. They have 18 holdings in common, and by portfolio weight the two funds are 17.6% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 17.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 18SOXX holds 30 · SPY holds 504
- Weight in Shared Holdings
- SOXX 82%·SPY 18%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 SOXX
12 of 30 positions (17.4% of the fund) are not held by SPY.
Sector Breakdown
| Sector | SOXX | SPY |
|---|---|---|
| Information Technology | 98.6% | 37.6% |
| Financials | 0.0% | 12.3% |
| Communication Services | 0.0% | 9.7% |
| Consumer Discretionary | 0.0% | 9.3% |
| Health Care | 0.0% | 8.9% |
| Other Sectors | 0.0% | 22.1% |
| Unclassified | 1.2% | 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 SOXX, 0% of SPY).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| SOXX | -1.5% | +80.6% | +126.6% | +47.5% | +29.5% | +32.9% | 0.27% |
| 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 SOXX vs SPY →
Shared Holdings(18)
The top 10 shared positions account for 95% of the overlap, led by NVDA, AVGO and MU.
 NVDANVIDIA Corp. COM | 8.40% | 8.00% | 8.00% |
|---|---|---|---|
 AVGOBroadcom Inc COM | 8.27% | 3.00% | 3.00% |
 MUMicron Technology Inc. COM | 6.99% | 1.50% | 1.50% |
 AMDAdvanced Micro Devices Inc. COM | 6.47% | 1.20% | 1.20% |
 INTCIntel Corporation COM | 4.13% | 0.71% | 0.71% |
 AMATApplied Materials Inc. COM | 5.84% | 0.63% | 0.63% |
 LRCXLam Research Corporation COM NEW | 3.90% | 0.58% | 0.58% |
 TXNTexas Instruments Inc. COM | 3.91% | 0.38% | 0.38% |
 KLACKLA Corp. COM NEW | 4.12% | 0.38% | 0.38% |
 MRVLMarvell Technology Inc COM | 5.17% | 0.28% | 0.28% |
 ADIAnalog Devices Inc. COM | 3.82% | 0.28% | 0.28% |
 QCOMQUALCOMM Inc. COM | 3.86% | 0.25% | 0.25% |
 MPWRMonolithic Power Systems Inc. COM | 4.08% | 0.10% | 0.10% |
 TERTeradyne Inc. COM | 3.95% | 0.09% | 0.09% |
 NXPINXP Semiconductors NV EUR0.20 | 3.70% | 0.09% | 0.09% |
 MCHPMicrochip Technology Incorporated COM | 3.02% | 0.06% | 0.06% |
 ONON Semiconductor Corp. COM | 2.14% | 0.05% | 0.05% |
 SWKSSkyworks Solutions, Inc. COM | 0.71% | 0.02% | 0.02% |
Frequently Asked Questions
How much do SOXX and SPY overlap?
SOXX and SPY overlap by 17.6% of portfolio weight. They share 18 holdings (SOXX holds 30 positions and SPY holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both SOXX and SPY?
The two portfolios are 17.6% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of SOXX and SPY?
The largest positions held by both funds are NVDA, AVGO, MU, AMD and INTC. Together the top 10 shared positions account for 95% of the total overlap.
What does SOXX own that SPY doesn't?
12 positions (17.4% of SOXX) are unique to SOXX, led by ASML, TSM and ENTG. In the other direction, 486 positions (82.3% of SPY) are unique to SPY.