IUSG vs VOOG: Holdings Overlap
IUSGiShares Core S&P U.S. Growth ETF
iShares · 385 holdings · $33.6B · as of 2026-03-31
VOOGVanguard S&P 500 Growth Index Fund
Vanguard · 146 holdings · $27.2B · as of 2026-05-31
Holdings snapshots are 61 days apart (IUSG: 2026-03-31, VOOG: 2026-05-31). 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 IUSG and VOOG?
iShares Core S&P U.S. Growth ETF (IUSG, by iShares) holds 385 positions; Vanguard S&P 500 Growth Index Fund (VOOG, by Vanguard) holds 146. They have 143 holdings in common, and by portfolio weight the two funds are 90.5% identical. In practical terms the pair is essentially interchangeable, so holding both adds little diversification.
- Overlap by Weight
- 90.5%Sum of the smaller weight of each shared holding
- Shared Holdings
- 143IUSG holds 385 · VOOG holds 146
- Weight in Shared Holdings
- IUSG 95%·VOOG 100%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 IUSG
242 of 385 positions (5.3% of the fund) are not held by VOOG. Showing the top 30 by weight.
Only in VOOG
3 of 146 positions (0.1% of the fund) are not held by IUSG.
CCLCarnival Corp Ltd0.10%
VEEVVeeva Systems, Inc., Class A0.05%
- ABIOMED INC-CVR0.00%
Sector Breakdown
| Sector | IUSG | VOOG |
|---|---|---|
| Information Technology | 46.0% | 52.1% |
| Communication Services | 16.0% | 16.6% |
| Financials | 9.6% | 8.1% |
| Consumer Discretionary | 9.4% | 8.8% |
| Industrials | 8.1% | 6.1% |
| Other Sectors | 10.6% | 8.0% |
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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IUSG | +4.3% | +15.9% | +25.6% | +26.2% | +13.9% | +17.5% | 0.48% |
| VOOG | +4.5% | +15.6% | +25.4% | +26.8% | +14.1% | +17.8% | 0.44% |
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 IUSG vs VOOG →
Shared Holdings(143)
The top 10 shared positions account for 62% of the overlap, led by NVDA, MSFT and AAPL.
 NVDANVIDIA Corp. COM | 13.84% | 14.26% | 13.84% |
|---|---|---|---|
 MSFTMicrosoft Corp. COM | 8.97% | 9.29% | 8.97% |
 AAPLApple Inc. COM | 6.08% | 6.37% | 6.08% |
 GOOGLAlphabet Inc. CAP STK CL A | 5.47% | 6.16% | 5.47% |
 AVGOBroadcom Inc COM | 4.79% | 5.89% | 4.79% |
 GOOGAlphabet Inc. CAP STK CL C | 4.38% | 4.89% | 4.38% |
 METAMeta Platforms, Inc., Class A | 4.09% | 3.85% | 3.85% |
 AMZNAmazon.com, Inc. COM | 3.52% | 3.90% | 3.52% |
 BRK-BBerkshire Hathaway, Inc., Class B | 2.87% | 2.42% | 2.42% |
 LLYEli Lilly & Co. COM | 2.38% | 2.43% | 2.38% |
 TSLATesla Inc COM | 2.12% | 2.11% | 2.11% |
 JPMJPMorgan Chase & Co. COM | 1.76% | 1.43% | 1.43% |
 MUMicron Technology Inc. COM | 1.24% | 3.04% | 1.24% |
 AMDAdvanced Micro Devices Inc. COM | 1.08% | 2.34% | 1.08% |
 CATCaterpillar Inc COM | 1.08% | 1.13% | 1.08% |
 NFLXNetflix, Inc. COM | 1.33% | 1.01% | 1.01% |
 PLTRPalantir Technologies, Inc., Class A | 1.09% | 0.99% | 0.99% |
 JNJJohnson & Johnson COM | 1.13% | 0.89% | 0.89% |
 AMATApplied Materials Inc. COM | 0.89% | 0.99% | 0.89% |
 LRCXLam Research Corporation COM NEW | 0.87% | 1.10% | 0.87% |
 VVisa, Inc., Class A | 0.91% | 0.84% | 0.84% |
 MAMasterCard Incorporated CL A | 0.89% | 0.75% | 0.75% |
 GEVGE Vernova Inc. COM | 0.77% | 0.73% | 0.73% |
 RTXRTX Corp. COM | 0.85% | 0.67% | 0.67% |
 KLACKLA Corp. COM NEW | 0.63% | 0.70% | 0.63% |
Frequently Asked Questions
How much do IUSG and VOOG overlap?
IUSG and VOOG overlap by 90.5% of portfolio weight. They share 143 holdings (IUSG holds 385 positions and VOOG holds 146), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IUSG and VOOG?
The two portfolios are 90.5% identical by weight. Owning both is largely redundant: they are close to the same portfolio, so a second position mostly duplicates the first.
What are the biggest shared holdings of IUSG and VOOG?
The largest positions held by both funds are NVDA, MSFT, AAPL, GOOGL and AVGO. Together the top 10 shared positions account for 62% of the total overlap.
What does IUSG own that VOOG doesn't?
242 positions (5.3% of IUSG) are unique to IUSG, led by CCL, FTI and UTHR. In the other direction, 3 positions (0.1% of VOOG) are unique to VOOG.