Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
IJR vs IWC: how they differ
IJR and IWC hold 2% of their weight in the same names, and IWC returned more over the year.
iShares Core S&P Small-Cap ETF and iShares Micro-Cap ETF.
What they hold in common
By the books each fund has filed, IJR and IWC hold 2% of their money in the same securities at the same weight.
| Holding | IJR | IWC |
|---|---|---|
| PENGUIN SOLUTIONS INC | 0.13% | 0.58% |
| INTERFACE | 0.11% | 0.47% |
| DIME COMMERCIAL BANCSHARES | 0.10% | 0.39% |
| ELLINGTON FINANCIAL | 0.09% | 0.38% |
| ARLO TECHNOLOGIES | 0.08% | 0.33% |
| BIOLIFE SOLUTIONS | 0.08% | 0.35% |
| USD CASH | 0.08% | 0.11% |
| BJS RESTAURANTS INC | 0.07% | 0.27% |
| UNITED FIRE GROUP INC | 0.07% | 0.28% |
| REX AMERICAN RESOURCES | 0.07% | 0.29% |
| BRISTOW GROUP | 0.06% | 0.27% |
| QUINSTREET INC | 0.06% | 0.24% |
| Only in IJR | Only in IWC |
|---|---|
| CORCEPT THERAPEUTICS 0.62% | CAREDX 0.61% |
| VIASAT INC 0.57% | SELLAS LIFE SCIENCES GROUP INC 0.60% |
| GLAUKOS 0.57% | NURIX THERAPEUTICS 0.59% |
| MATCH GROUP INC 0.56% | OUSTER 0.52% |
| BRINKER INTERNATIONAL INC 0.52% | VIRIDIAN THERAPEUTICS ORS 0.48% |
| QORVO 0.51% | MBX BIOSCIENCES 0.45% |
| PAYCOM SOFTWARE 0.51% | UROGEN PHARMA 0.43% |
| PROTAGONIST THERAPEUTICS 0.50% | INNODATA 0.40% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Sep 10, 2026.
| IJR iShares Core S&P Small-Cap ETF | IWC iShares Micro-Cap ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | iShares |
| What it is | S&P SmallCap 600 | Russell Microcap |
| Total return, 1 year | +19.9% | +31.3% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +2.4 pts | +13.8 pts |
| Expense ratio | 0.06% | not published |
| Already in the S&P 500 | 0.0% | 91.9% |
| Holdings | 608 | 1252 |
IJR in plain words
IJR is an index equity fund tracking the S&P SmallCap 600. Over the year to Sep 11, 2026 it returned +19.9% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.06% a year. By its holdings filed for Sep 10, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 608 positions, with the top ten at 6.8%. It sat 5.5% below its high of Aug 14, 2026 on Sep 11, 2026.
IWC in plain words
IWC is an index equity fund tracking the Russell Microcap. Over the year to Sep 11, 2026 it returned +31.3% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. By its holdings filed for Sep 10, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 1252 positions, with the top ten at 5.1%. It sat 5.0% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, IJR or IWC?
- In the year to Sep 13, 2026, with distributions reinvested, IJR returned +19.9% and IWC returned +31.3%, so IWC returned more. One year is one year; the longer windows are in the table.
- How much do IJR and IWC overlap with the S&P 500?
- By their latest filed holdings, 0% of IJR and 92% of IWC by weight is stocks the S&P 500 already holds. Between the two funds, 2% of their books are the same securities at the same weight.
Other comparisons
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, IJR against IWC, data as of Sep 13, 2026. https://etfiq.com/compare/any/ijr-vs-iwc Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources