IVOO vs VBK: Holdings Overlap
IVOOVanguard S&P Mid-cap 400 Index Fund
Vanguard · 400 holdings · $3.9B · as of 2026-05-31
VBKVanguard Small-cap Growth Index Fund
Vanguard · 551 holdings · $24.3B · as of 2026-03-31
Holdings snapshots are 61 days apart (IVOO: 2026-05-31, VBK: 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 VBK?
Vanguard S&P Mid-cap 400 Index Fund (IVOO, by Vanguard) holds 400 positions; Vanguard Small-cap Growth Index Fund (VBK, by Vanguard) holds 551. They have 159 holdings in common, and by portfolio weight the two funds are 39.9% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 39.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 159IVOO holds 400 · VBK holds 551
- Weight in Shared Holdings
- IVOO 46%·VBK 43%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
241 of 400 positions (54.1% of the fund) are not held by VBK. Showing the top 30 by weight.
Only in VBK
392 of 551 positions (56.2% of the fund) are not held by IVOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IVOO | VBK |
|---|---|---|
| Industrials | 25.6% | 24.6% |
| Information Technology | 15.7% | 21.6% |
| Health Care | 8.7% | 16.1% |
| Financials | 14.3% | 6.1% |
| Consumer Discretionary | 11.1% | 9.9% |
| Other Sectors | 24.4% | 20.6% |
| Unclassified | 0.0% | 0.9% |
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. “Unclassified” is weight we could not classify (0% of IVOO, 1% of VBK).
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% |
| VBK | +1.8% | +19.6% | +29.4% | +16.6% | +5.3% | +11.4% | 0.42% |
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 VBK →
Shared Holdings(159)
The top 10 shared positions account for 17% of the overlap, led by FTI, CW and ATI.
 FTITechnipFMC PLC USD1 | 0.79% | 0.92% | 0.79% |
|---|---|---|---|
 CWCurtiss-Wright Corporation | 0.79% | 0.84% | 0.79% |
 ATIATI Inc COM | 0.68% | 0.66% | 0.66% |
 MTZMastec, Inc. COM | 0.66% | 0.68% | 0.66% |
 NVTNVent Electric PLC COM USD0.01 | 0.77% | 0.64% | 0.64% |
 TWLOTwilio, Inc., Class A | 0.82% | 0.64% | 0.64% |
 FNFabrinet COM USD0.01 | 0.67% | 0.62% | 0.62% |
 CRSCarpenter Technology Corporation COM | 0.67% | 0.62% | 0.62% |
 PEverpure, Inc., Class A | 0.71% | 0.62% | 0.62% |
 WWDWoodward Inc. COM | 0.59% | 0.71% | 0.59% |
 ENTGEntegris Inc COM | 0.60% | 0.59% | 0.59% |
 NXTNextpower Inc. CLASS A COM | 0.66% | 0.57% | 0.57% |
 RBARB Global Inc COM | 0.56% | 0.59% | 0.56% |
 RGLDRoyal Gold, Inc. COM | 0.52% | 0.72% | 0.52% |
 RBCRBC Bearings Incorporated | 0.52% | 0.57% | 0.52% |
 BWXTBWX Technologies Inc. COM | 0.51% | 0.62% | 0.51% |
 MTSIMACOM Technology Solutions Holdings Inc. COM | 0.67% | 0.50% | 0.50% |
 TLNTalen Energy Corporation COM | 0.50% | 0.49% | 0.49% |
 OKTAOkta Inc. Class A | 0.60% | 0.44% | 0.44% |
 NBIXNeurocrine Biosciences Inc COM | 0.45% | 0.44% | 0.44% |
 LSCCLattice Semiconductor Corporation COM | 0.57% | 0.42% | 0.42% |
 SGISomnigroup International Inc. COM | 0.42% | 0.42% | 0.42% |
 LECOLincoln Electric Holdings Inc. COM | 0.41% | 0.46% | 0.41% |
 CLHClean Harbors, Inc. COM | 0.40% | 0.46% | 0.40% |
 STRLSterling Infrastructure Inc COM | 0.75% | 0.40% | 0.40% |
Frequently Asked Questions
How much do IVOO and VBK overlap?
IVOO and VBK overlap by 39.9% of portfolio weight. They share 159 holdings (IVOO holds 400 positions and VBK holds 551), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IVOO and VBK?
The two portfolios are 39.9% 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 IVOO and VBK?
The largest positions held by both funds are FTI, CW, ATI, MTZ and NVT. Together the top 10 shared positions account for 17% of the total overlap.
What does IVOO own that VBK doesn't?
241 positions (54.1% of IVOO) are unique to IVOO, led by FLEX, ILMN and UTHR. In the other direction, 392 positions (56.2% of VBK) are unique to VBK.