IJR vs ITOT: 3% overlap
iShares Core S&P Small-Cap ETF and iShares Core S&P Total U.S. Stock Market ETF share 2.7% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
You would hold two tickers and get the diversification of 2.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
IJR and ITOT hold 597 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IJR | in ITOT | Δ |
|---|---|---|---|
| CASH | 2.1% | 0.2% | 1.9% |
| VSAT | 0.6% | 0.0% | 0.6% |
| CORT | 0.5% | 0.0% | 0.5% |
| GKOS | 0.5% | 0.0% | 0.5% |
| ALKS | 0.5% | 0.0% | 0.5% |
| ESI | 0.5% | 0.0% | 0.5% |
| MTCH | 0.5% | 0.0% | 0.5% |
| FORM | 0.5% | 0.0% | 0.5% |
| ESE | 0.5% | 0.0% | 0.5% |
| AGX | 0.5% | 0.0% | 0.5% |
Where IJR and ITOT differ
Sector weights as a share of each fund, ordered by the size of the gap rather than the size of the sector — two funds that overlap heavily still usually diverge somewhere.
| Sector | IJR | ITOT | Δ |
|---|---|---|---|
| Information Technology | 12.1% | 35.2% | −23.0pp |
| Industrials | 18.5% | 10.1% | +8.3pp |
| Financials | 17.8% | 12.7% | +5.2pp |
| Communication Services | 3.6% | 8.7% | −5.1pp |
| Consumer Discretionary | 13.8% | 8.8% | +5.0pp |
| Real Estate | 6.2% | 2.3% | +3.9pp |
| Cash and/or Derivatives | 2.1% | 0.2% | +1.9pp |
| Materials | 3.9% | 2.1% | +1.8pp |
Δ is IJR minus ITOT, in percentage points. Sector data is not published by every issuer, so “Unclassified” is a real category rather than a gap in the table.
What each fund holds alone
0.3% of IJR by weight, held in no part of ITOT.
97.2% of ITOT by weight, held in no part of IJR.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| IJR | ITOT | |
|---|---|---|
| Top 10 holdings | 6.6% | 32.7% |
| Positions held | 603 | 2,440 |
| Cost per $10,000 held, per year | $6 | $3 |
Cost is the expense ratio applied to $10,000; it excludes any brokerage commission, bid-ask spread or tax consequence. Figures are facts about the funds, not a suggestion about which to hold.
Frequently asked
How much do IJR and ITOT overlap?
IJR and ITOT overlap 2.7% by portfolio weight — largely distinct portfolios. They share 597 holdings. The figure comes from current issuer holdings files (IJR as of 2026-07-23, ITOT as of 2026-07-23).
How is the overlap between IJR and ITOT calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If IJR holds a stock at 6% and ITOT holds the same stock at 4%, 4% counts as shared. The result is bounded between 0% and 100%, and it is computed after looking through any fund-of-funds to the underlying holdings.
Is it redundant to hold both IJR and ITOT?
That depends on your goals — we state facts, not advice. At 2.7% overlap, each fund still contributes meaningfully distinct exposure.
What does IJR own that ITOT doesn't?
IJR holds 603 positions and ITOT holds 2,440; 5 of IJR's positions don't appear in ITOT at all, and they are 0.3% of IJR by weight.
You probably hold more than two funds
This page compares IJR and ITOT. Paste your whole portfolio — brokerage, 401(k), IRA — and see the overlap across every fund at once, plus what you actually own underneath them and your own Effective Funds number. Free, no account, nothing stored.
X-ray my portfolio — free →Watch IJR vs ITOT
We re-read both funds’ published holdings every weeknight. Leave an address and we'll tell you when what's inside actually changes.
Not sending yet — email alerts are built but switched off, and you'll be among the first when they turn on. No spam, one-click unsubscribe.
Related comparisons
Sources: issuer holdings files, IJR as of 2026-07-23, ITOT as of 2026-07-23. Weights are fractions of each fund. Diagnostics, not advice.