IVOO vs IJK: Holdings Overlap
IVOOVanguard S&P Mid-cap 400 Index Fund
Vanguard · 400 holdings · $3.9B · as of 2026-05-31
IJKiShares S&P Mid-Cap 400 Growth ETF
iShares · 242 holdings · $11.0B · as of 2026-03-31
Holdings snapshots are 61 days apart (IVOO: 2026-05-31, IJK: 2026-03-31). 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 IVOO and IJK?
Vanguard S&P Mid-cap 400 Index Fund (IVOO, by Vanguard) holds 400 positions; iShares S&P Mid-Cap 400 Growth ETF (IJK, by iShares) holds 242. They have 241 holdings in common, and by portfolio weight the two funds are 64.9% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 64.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 241IVOO holds 400 · IJK holds 242
- Weight in Shared Holdings
- IVOO 67%·IJK 98%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 IVOO
159 of 400 positions (33.0% of the fund) are not held by IJK. Showing the top 30 by weight.
Only in IJK
1 of 242 positions (1.6% of the fund) are not held by IVOO.
CASYCasey's General Stores, Inc.1.65%
Sector Breakdown
| Sector | IVOO | IJK |
|---|---|---|
| Industrials | 25.6% | 31.3% |
| Information Technology | 15.7% | 17.3% |
| Health Care | 8.7% | 14.4% |
| Financials | 14.3% | 7.2% |
| Consumer Discretionary | 11.1% | 10.2% |
| Other Sectors | 24.4% | 19.4% |
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 |
|---|---|---|---|---|---|---|---|
| IVOO | +3.1% | +18.5% | +26.0% | +14.6% | +9.0% | +11.2% | 1.14% |
| IJK | +3.1% | +21.4% | +27.9% | +15.9% | +8.4% | +11.3% | 0.52% |
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 IVOO vs IJK →
Shared Holdings(241)
The top 10 shared positions account for 13% of the overlap, led by FLEX, TWLO and FTI.
 FLEXFlex Ltd. COM USD0.01 | 1.58% | 1.48% | 1.48% |
|---|---|---|---|
 TWLOTwilio, Inc., Class A | 0.82% | 1.17% | 0.82% |
 FTITechnipFMC PLC USD1 | 0.79% | 1.71% | 0.79% |
 CWCurtiss-Wright Corporation | 0.79% | 1.54% | 0.79% |
 NVTNVent Electric PLC COM USD0.01 | 0.77% | 1.17% | 0.77% |
 STRLSterling Infrastructure Inc COM | 0.75% | 0.77% | 0.75% |
 XPOXPO Inc COM | 0.72% | 1.40% | 0.72% |
 PEverpure, Inc., Class A | 0.71% | 1.14% | 0.71% |
 UTHRUnited Therapeutics Corporation COM | 0.68% | 1.57% | 0.68% |
 ATIATI Inc COM | 0.68% | 1.21% | 0.68% |
 MTSIMACOM Technology Solutions Holdings Inc. COM | 0.67% | 0.88% | 0.67% |
 FNFabrinet COM USD0.01 | 0.67% | 1.15% | 0.67% |
 CRSCarpenter Technology Corporation COM | 0.67% | 1.20% | 0.67% |
 NXTNextpower Inc. CLASS A COM | 0.66% | 0.71% | 0.66% |
 MTZMastec, Inc. COM | 0.66% | 1.21% | 0.66% |
 ILMNIllumina Inc COM | 0.71% | 0.62% | 0.62% |
 MKSIMKS Inc. COM | 0.62% | 0.67% | 0.62% |
 OKTAOkta Inc. Class A | 0.60% | 0.82% | 0.60% |
 WWDWoodward Inc. COM | 0.59% | 1.31% | 0.59% |
 BURLBurlington Stores Inc. COM | 0.57% | 0.76% | 0.57% |
 RBARB Global Inc COM | 0.56% | 1.09% | 0.56% |
 RGLDRoyal Gold, Inc. COM | 0.52% | 1.26% | 0.52% |
 RBCRBC Bearings Incorporated | 0.52% | 1.05% | 0.52% |
 TTMITTM Technologies Inc COM | 0.51% | 0.62% | 0.51% |
 BWXTBWX Technologies Inc. COM | 0.51% | 1.15% | 0.51% |
Frequently Asked Questions
How much do IVOO and IJK overlap?
IVOO and IJK overlap by 64.9% of portfolio weight. They share 241 holdings (IVOO holds 400 positions and IJK holds 242), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IVOO and IJK?
The two portfolios are 64.9% 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 IVOO and IJK?
The largest positions held by both funds are FLEX, TWLO, FTI, CW and NVT. Together the top 10 shared positions account for 13% of the total overlap.
What does IVOO own that IJK doesn't?
159 positions (33.0% of IVOO) are unique to IVOO, led by AA, RS and SNX. In the other direction, 1 positions (1.6% of IJK) are unique to IJK.