ITOT vs VB: how much do they overlap?
iShares Core S&P Total U.S. Stock Market ETF (ITOT) · Vanguard Small-Cap ETF (VB)
overlap by weight · 1282 shared holdings
ITOT: 2470 holdings (as of 2026-03-31) · VB: 1312 holdings (as of 2026-03-31)
Low overlap
What this means
ITOT and VB hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Overlap by weight sums the smaller of the two funds' weights for every stock they both hold — it answers "how much of my money is in the same stocks either way?" See methodology.
Top shared holdings
| Company | Ticker | in ITOT | in VB |
|---|---|---|---|
| Ciena Corp. | CIEN | 0.09% | 0.38% |
| Lumentum Holdings, Inc. | LITE | 0.08% | 0.35% |
| Comfort Systems USA, Inc. | FIX | 0.08% | 0.34% |
| Coherent Corp. | COHR | 0.07% | 0.31% |
| EQT Corp. | EQT | 0.06% | 0.28% |
| Insmed, Inc. | INSM | 0.06% | 0.25% |
| Bloom Energy Corp. | BE | 0.06% | 0.25% |
| EMCOR Group, Inc. | EME | 0.05% | 0.46% |
| NRG Energy, Inc. | NRG | 0.05% | 0.43% |
| Atmos Energy Corp. | ATO | 0.05% | 0.43% |
FAQ
How much do ITOT and VB overlap?
ITOT and VB have a 12% overlap by weight, sharing 1282 holdings (out of 2470 in ITOT and 1312 in VB), based on official issuer holdings as of 2026-03-31.
What does 12% overlap mean?
ITOT and VB hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Which stocks do ITOT and VB both hold?
The largest shared positions are Ciena Corp., Lumentum Holdings, Inc., Comfort Systems USA, Inc., Coherent Corp., EQT Corp.. The full list of top shared holdings with weights in each fund is shown on this page.