IWF vs MGK: Holdings Overlap
IWFiShares Russell 1000 Growth ETF
iShares · 387 holdings · $127.3B · as of 2026-03-31
MGKVanguard Mega Cap Growth Index Fund
Vanguard · 59 holdings · $33.7B · as of 2026-03-31
How similar are IWF and MGK?
iShares Russell 1000 Growth ETF (IWF, by iShares) holds 387 positions; Vanguard Mega Cap Growth Index Fund (MGK, by Vanguard) holds 59. They have 53 holdings in common, and by portfolio weight the two funds are 77.3% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 77.3%Sum of the smaller weight of each shared holding
- Shared Holdings
- 53IWF holds 387 · MGK holds 59
- Weight in Shared Holdings
- IWF 78%·MGK 97%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 IWF
334 of 387 positions (22.1% of the fund) are not held by MGK. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWF | MGK |
|---|---|---|
| Information Technology | 49.2% | 54.4% |
| Communication Services | 12.4% | 16.7% |
| Consumer Discretionary | 13.1% | 13.1% |
| Health Care | 8.0% | 5.2% |
| Industrials | 6.7% | 3.0% |
| Other Sectors | 10.4% | 7.4% |
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 |
|---|---|---|---|---|---|---|---|
| IWF | +2.7% | +5.5% | +13.1% | +22.0% | +12.6% | +17.8% | 0.35% |
| MGK | +3.8% | +10.2% | +19.4% | +24.7% | +14.0% | +18.8% | 0.32% |
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 IWF vs MGK →
Shared Holdings(53)
The top 10 shared positions account for 76% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 12.92% | 13.75% | 12.92% |
|---|---|---|---|
 AAPLApple Inc. COM | 11.64% | 12.60% | 11.64% |
 MSFTMicrosoft Corp. COM | 8.82% | 9.01% | 8.82% |
 AMZNAmazon.com, Inc. COM | 4.66% | 4.59% | 4.59% |
 AVGOBroadcom Inc COM | 4.79% | 4.40% | 4.40% |
 TSLATesla Inc COM | 3.55% | 4.18% | 3.55% |
 GOOGLAlphabet Inc. CAP STK CL A | 3.54% | 5.51% | 3.54% |
 METAMeta Platforms, Inc., Class A | 3.46% | 4.17% | 3.46% |
 GOOGAlphabet Inc. CAP STK CL C | 2.87% | 4.37% | 2.87% |
 LLYEli Lilly & Co. COM | 2.66% | 3.17% | 2.66% |
 VVisa, Inc., Class A | 1.84% | 1.97% | 1.84% |
 NFLXNetflix, Inc. COM | 1.47% | 1.76% | 1.47% |
 MAMasterCard Incorporated CL A | 1.45% | 1.72% | 1.45% |
 PLTRPalantir Technologies, Inc., Class A | 1.15% | 1.42% | 1.15% |
 LRCXLam Research Corporation COM NEW | 0.97% | 1.25% | 0.97% |
 ORCLOracle Corp. COM | 0.89% | 1.18% | 0.89% |
 GEVGE Vernova Inc. COM | 0.85% | 1.14% | 0.85% |
 KLACKLA Corp. COM NEW | 0.70% | 0.98% | 0.70% |
 AMDAdvanced Micro Devices Inc. COM | 0.69% | 1.49% | 0.69% |
 ISRGIntuitive Surgical Inc. COM NEW | 0.59% | 0.83% | 0.59% |
 APHAmphenol Corporation CL A | 0.56% | 0.80% | 0.56% |
 UBERUber Technologies Inc COM | 0.52% | 0.78% | 0.52% |
 BKNGBooking Holdings Inc COM | 0.46% | 0.71% | 0.46% |
 PANWPalo Alto Networks Inc COM | 0.46% | 0.71% | 0.46% |
 ANETArista Networks Inc COM SHS | 0.46% | 0.70% | 0.46% |
Frequently Asked Questions
How much do IWF and MGK overlap?
IWF and MGK overlap by 77.3% of portfolio weight. They share 53 holdings (IWF holds 387 positions and MGK holds 59), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWF and MGK?
The two portfolios are 77.3% 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 IWF and MGK?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and AVGO. Together the top 10 shared positions account for 76% of the total overlap.
What does IWF own that MGK doesn't?
334 positions (22.1% of IWF) are unique to IWF, led by COST, ABBV and GE. In the other direction, 6 positions (3.2% of MGK) are unique to MGK.