IMCB vs TMSL: Differences, Returns & Fees
IMCB and TMSL hold 8% of their weight in the same names, and IMCB returned +19.2% over the year. Net assets on Oct 20, 2026: $1.7bn for iShares Morningstar Mid-Cap ETF and $3.1bn for T. Rowe Price Small-Mid Cap ETF.
IMCB costs 0.51 points a year less; their one-year returns differ by 2.3 points; TMSL is 1.8 times larger.
| IMCB | TMSL | |
|---|---|---|
| Expense ratio | 0.04% | 0.55% |
| Net assets | $1.7bn | $3.1bn |
| Total return, 1 year | +19.2% | +16.9% |
| What it tracks | Morningstar US Mid Cap Index | No index, actively managed |
| Holdings in common | 8% | |
| Top ten holdings, share of the fund | 7.9% | 9.8% |
| Below its high | 3.3%, high on Aug 14, 2026 | 8.3%, high on Aug 14, 2026 |
Holdings in common uses holdings dated Jun 30, 2026 and Oct 19, 2026.
What they hold in common
By the books each fund has filed, IMCB and TMSL hold 8% of their money in the same securities at the same weight. Holdings dated Jun 30, 2026 and Oct 19, 2026.
half
8% in common
On the same fields
IMCB and TMSL on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About IMCB
IMCB tracks an index. Over the year to Oct 20, 2026 it returned +19.2% with distributions reinvested. The prospectus expense ratio is 0.04% a year. By its holdings published by its issuer for Oct 19, 2026, 86% of the fund by weight is stocks the S&P 500 also holds, across 394 positions, with the top ten at 7.9%. It sat 3.3% below its high of Aug 14, 2026 on Oct 20, 2026.
About TMSL
TMSL is actively managed and tracks no index. The prospectus expense ratio is 0.55% a year. By its holdings filed for Jun 30, 2026, 15% of the fund by weight is stocks the S&P 500 also holds, across 297 positions, with the top ten at 9.8%. It sat 8.3% below its high of Aug 14, 2026 on Oct 20, 2026.
Over the year to Oct 20, 2026 it returned +16.9% with distributions reinvested, against +15.0% for its benchmark, the Russell 3000 Index.
Questions people ask
- Which returned more over the last year, IMCB or TMSL?
- In the year to Oct 20, 2026, with distributions reinvested, IMCB returned +19.2% and TMSL +16.9%.
- Which is cheaper, IMCB or TMSL?
- IMCB is cheaper, by 0.51 percentage points a year. That is about $51 on $10,000 held for a year. Fees come from each fund's prospectus.
ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
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ETFIQ, IMCB against TMSL, data as of Oct 20, 2026. https://etfiq.com/compare/any/imcb-vs-tmsl
ETFIQ. (Oct 20, 2026). IMCB against TMSL. Retrieved from https://etfiq.com/compare/any/imcb-vs-tmsl
[IMCB against TMSL (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/imcb-vs-tmsl)
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