IUSG vs VONG: Holdings Overlap
IUSGiShares Core S&P U.S. Growth ETF
iShares · 385 holdings · $33.6B · as of 2026-03-31
VONGVanguard Russell 1000 Growth Index Fund
Vanguard · 387 holdings · $45.7B · as of 2026-05-31
Holdings snapshots are 61 days apart (IUSG: 2026-03-31, VONG: 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 VONG?
iShares Core S&P U.S. Growth ETF (IUSG, by iShares) holds 385 positions; Vanguard Russell 1000 Growth Index Fund (VONG, by Vanguard) holds 387. They have 176 holdings in common, and by portfolio weight the two funds are 71.6% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 71.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 176IUSG holds 385 · VONG holds 387
- Weight in Shared Holdings
- IUSG 82%·VONG 88%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
209 of 385 positions (17.4% of the fund) are not held by VONG. Showing the top 30 by weight.
Only in VONG
211 of 387 positions (11.9% of the fund) are not held by IUSG. Showing the top 30 by weight.
Sector Breakdown
| Sector | IUSG | VONG |
|---|---|---|
| Information Technology | 46.0% | 52.8% |
| Communication Services | 16.0% | 12.5% |
| Consumer Discretionary | 9.4% | 12.7% |
| Financials | 9.6% | 5.1% |
| Industrials | 8.1% | 6.2% |
| Other Sectors | 10.6% | 10.6% |
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% |
| VONG | +2.7% | +5.6% | +13.3% | +22.2% | +12.8% | +17.9% | 0.45% |
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 VONG →
Shared Holdings(176)
The top 10 shared positions account for 71% of the overlap, led by NVDA, MSFT and AAPL.
 NVDANVIDIA Corp. COM | 13.84% | 13.07% | 13.07% |
|---|---|---|---|
 MSFTMicrosoft Corp. COM | 8.97% | 8.96% | 8.96% |
 AAPLApple Inc. COM | 6.08% | 11.95% | 6.08% |
 AVGOBroadcom Inc COM | 4.79% | 5.77% | 4.79% |
 GOOGLAlphabet Inc. CAP STK CL A | 5.47% | 3.91% | 3.91% |
 AMZNAmazon.com, Inc. COM | 3.52% | 5.06% | 3.52% |
 METAMeta Platforms, Inc., Class A | 4.09% | 3.19% | 3.19% |
 GOOGAlphabet Inc. CAP STK CL C | 4.38% | 3.15% | 3.15% |
 LLYEli Lilly & Co. COM | 2.38% | 2.67% | 2.38% |
 TSLATesla Inc COM | 2.12% | 3.48% | 2.12% |
 NFLXNetflix, Inc. COM | 1.33% | 1.10% | 1.10% |
 AMDAdvanced Micro Devices Inc. COM | 1.08% | 1.47% | 1.08% |
 PLTRPalantir Technologies, Inc., Class A | 1.09% | 1.03% | 1.03% |
 VVisa, Inc., Class A | 0.91% | 1.57% | 0.91% |
 MAMasterCard Incorporated CL A | 0.89% | 1.20% | 0.89% |
 LRCXLam Research Corporation COM NEW | 0.87% | 1.20% | 0.87% |
 GEVGE Vernova Inc. COM | 0.77% | 0.79% | 0.77% |
 KLACKLA Corp. COM NEW | 0.63% | 0.76% | 0.63% |
 ABBVAbbVie Inc. COM | 0.58% | 1.16% | 0.58% |
 APHAmphenol Corporation CL A | 0.51% | 0.55% | 0.51% |
 GEGE Aerospace COM NEW | 0.51% | 1.01% | 0.51% |
 ISRGIntuitive Surgical Inc. COM NEW | 0.53% | 0.45% | 0.45% |
 UBERUber Technologies Inc COM | 0.48% | 0.43% | 0.43% |
 ORCLOracle Corp. COM | 0.42% | 1.15% | 0.42% |
 ANETArista Networks Inc COM SHS | 0.41% | 0.50% | 0.41% |
Frequently Asked Questions
How much do IUSG and VONG overlap?
IUSG and VONG overlap by 71.6% of portfolio weight. They share 176 holdings (IUSG holds 385 positions and VONG holds 387), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IUSG and VONG?
The two portfolios are 71.6% 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 IUSG and VONG?
The largest positions held by both funds are NVDA, MSFT, AAPL, AVGO and GOOGL. Together the top 10 shared positions account for 71% of the total overlap.
What does IUSG own that VONG doesn't?
209 positions (17.4% of IUSG) are unique to IUSG, led by BRK-B, JPM and MU. In the other direction, 211 positions (11.9% of VONG) are unique to VONG.