IGM vs VOO: Holdings Overlap
IGMiShares Expanded Tech Sector ETF
iShares · 288 holdings · $10.7B · as of 2026-03-31
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
How similar are IGM and VOO?
iShares Expanded Tech Sector ETF (IGM, by iShares) holds 288 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 79 holdings in common, and by portfolio weight the two funds are 41.4% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 41.4%Sum of the smaller weight of each shared holding
- Shared Holdings
- 79IGM holds 288 · VOO holds 504
- Weight in Shared Holdings
- IGM 90%·VOO 41%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 IGM
209 of 288 positions (9.6% of the fund) are not held by VOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IGM | VOO |
|---|---|---|
| Information Technology | 82.6% | 32.7% |
| Communication Services | 17.1% | 10.5% |
| Financials | 0.0% | 12.4% |
| Consumer Discretionary | 0.0% | 9.9% |
| Health Care | 0.0% | 9.5% |
| Other Sectors | 0.0% | 24.9% |
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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IGM | +4.5% | +26.9% | +40.7% | +35.3% | +19.1% | +23.9% | 0.13% |
| 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 IGM vs VOO →
Shared Holdings(79)
The top 10 shared positions account for 76% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 8.44% | 7.58% | 7.58% |
|---|---|---|---|
 AAPLApple Inc. COM | 8.76% | 6.66% | 6.66% |
 MSFTMicrosoft Corp. COM | 8.23% | 4.91% | 4.91% |
 GOOGLAlphabet Inc. CAP STK CL A | 4.65% | 2.99% | 2.99% |
 AVGOBroadcom Inc COM | 8.16% | 2.62% | 2.62% |
 GOOGAlphabet Inc. CAP STK CL C | 3.73% | 2.40% | 2.40% |
 METAMeta Platforms, Inc., Class A | 4.17% | 2.24% | 2.24% |
 NFLXNetflix, Inc. COM | 2.68% | 0.73% | 0.73% |
 MUMicron Technology Inc. COM | 2.51% | 0.68% | 0.68% |
 PLTRPalantir Technologies, Inc., Class A | 2.20% | 0.60% | 0.60% |
 AMDAdvanced Micro Devices Inc. COM | 2.19% | 0.59% | 0.59% |
 CSCOCisco Systems, Inc. COM | 2.02% | 0.55% | 0.55% |
 AMATApplied Materials Inc. COM | 1.79% | 0.48% | 0.48% |
 LRCXLam Research Corporation COM NEW | 1.76% | 0.48% | 0.48% |
 ORCLOracle Corp. COM | 1.65% | 0.45% | 0.45% |
 IBMInternational Business Machines Corp. COM | 1.49% | 0.41% | 0.41% |
 INTCIntel Corporation COM | 1.37% | 0.37% | 0.37% |
 KLACKLA Corp. COM NEW | 1.27% | 0.35% | 0.35% |
 TXNTexas Instruments Inc. COM | 1.16% | 0.32% | 0.32% |
 CRMSalesforce Inc. COM | 1.15% | 0.31% | 0.31% |
 ADIAnalog Devices Inc. COM | 1.03% | 0.28% | 0.28% |
 APHAmphenol Corporation CL A | 1.02% | 0.28% | 0.28% |
 QCOMQUALCOMM Inc. COM | 0.91% | 0.25% | 0.25% |
 PANWPalo Alto Networks Inc COM | 0.85% | 0.23% | 0.23% |
 ANETArista Networks Inc COM SHS | 0.84% | 0.23% | 0.23% |
Frequently Asked Questions
How much do IGM and VOO overlap?
IGM and VOO overlap by 41.4% of portfolio weight. They share 79 holdings (IGM holds 288 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IGM and VOO?
The two portfolios are 41.4% identical by weight. Owning both is defensible: they share a meaningful core, but each fund adds exposure the other lacks.
What are the biggest shared holdings of IGM and VOO?
The largest positions held by both funds are NVDA, AAPL, MSFT, GOOGL and AVGO. Together the top 10 shared positions account for 76% of the total overlap.
What does IGM own that VOO doesn't?
209 positions (9.6% of IGM) are unique to IGM, led by SHOP, MRVL and NET. In the other direction, 425 positions (58.4% of VOO) are unique to VOO.