iShares Russell Mid-Cap Index Fund
U.S. stock index fund · tracks Russell Midcap Index
As of its 2026 Q2 report, iShares Russell Mid-Cap Index Fund held 809 positions with $2.39B in net assets. Its ten largest holdings made up 9.7% of the fund. Its share classes cost 0.04%–0.36% a year. Over the 12 months to May 2026, it returned 22.4%, with dividends reinvested. In 2026 Q3 it added 82 new positions and exited 63.
The investment objective of iShares Russell Mid-Cap Index Fund (the Fund), a series of BlackRock Funds SM (the Trust), is to seek to track the investment results of an index composed of mid-capitalization U.S. equities.
The fund tracks the Russell Midcap Index, which comprises approximately 800 mid-capitalization U.S. equities, using representative sampling to hold a portfolio with similar investment and fundamental characteristics to the index. Because the fund may not hold all index securities, its returns may diverge from the index.
What you own
| Company | Weight | Value | Shares | Reported price |
|---|---|---|---|---|
BlackRock Funds III | 1.58% | $37.75M | — | — |
iShares Russell Mid-Cap ETF | 1.20% | $28.73M | 275.4K | $104.34 |
SNDKSandisk Corp | 1.14% | $27.25M | 24.9K | $1,096.51 |
1.07% | $25.69M | 59.1K | $434.52 | |
GLWCorning Inc | 0.93% | $22.28M | 135.7K | $164.24 |
0.91% | $21.72M | 66.1K | $328.49 | |
0.78% | $18.62M | 25.6K | $727.77 | |
BLACKROCK CASH FUNDS TREASURY SL AGENCY SHARES | 0.72% | $17.26M | — | — |
0.71% | $16.93M | 69.7K | $243.04 | |
0.67% | $16.08M | 119.7K | $134.37 |
Reported price is the fund's own reported value divided by its own reported shares at 2026-04-30 — not a live quote, and not what the fund paid.
The 200 largest of 809 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Stocks | 99.18% |
| Cash & short-term | 2.33% |
| Derivatives | 0.06% |
Look-through blends 1 underlying fund; 0.0% of NAV was not looked through and stays direct-classified.
By sector
- Industrials
- 16.4%
- Information Technology
- 14.0%
- Financials
- 13.7%
- Health Care
- 10.3%
- 10 other sectors
- 45.6%
- Industrials
- 16.4%
- Information Technology
- 14.0%
- Financials
- 13.7%
- Health Care
- 10.3%
- Consumer Discretionary
- 8.3%
- Real Estate
- 6.6%
- Energy
- 6.1%
- Utilities
- 5.6%
- Consumer Staples
- 4.6%
- Materials
- 4.4%
- International
- 3.2%
- Communication Services
- 3.0%
- Cash
- 2.9%
- Other
- 0.9%
How it has done
C000155940 share class · total returns with dividends reinvested
Volatility over the last 12 months: 10.67%. Past returns are a record, not a forecast.
Jun 2026 and Jul 2026 have been filed since the trailing figures were struck, so they are not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
This fund changed legal form during the period shown. The history above is continuous — it spans both eras, and the change is not a gap in reporting.
Fees & fund details
iShares Russell Mid-Cap Index Fund is a U.S. equity index fund that tracks the Russell Midcap Index. 19% of iShares Russell Mid-Cap Index Fund’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 91% of the fund’s equity).
- Asset class
- Equity
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
- Expense ratio, by class
- 0.04% – 0.36%
- Portfolio turnover
- 17.00% a year · as of 2025 Q4
Turnover is how much of the portfolio was replaced in a year.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
82 new· the largest 8
63 exited· the largest 8
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