iShares Russell Mid-Cap Index Fund
BlackRock Funds
Fund classification
Classified from what the fund holds · as of 2026 Q2
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
Fund profile
As filed in the prospectus · 2025 Q4
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.
| Share class | Expense ratio |
|---|---|
| C000155940 | 0.10% |
| C000155941 | 0.04% |
| C000163604 | 0.36% |
Portfolio turnover 17.00% · as of 2025 Q4
Allocation
Asset groups · long / short shown separately, never netted · 2026 Q2
| 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.
Sector allocation
The same holdings as Allocation above, grouped by market sector instead of asset type · as of 2026 Q2
| Industrials | 18.2% |
| Information Technology | 14.3% |
| Financials | 12.8% |
| Consumer Discretionary | 9.5% |
| 10 smaller | 45.2% |
Government, Securitized and Cash are non-corporate buckets; International is foreign holdings we don’t sector-classify, and Other is the residual (held funds, unresolved names).
Portfolio growth profile
How much of the fund’s stock holdings are in fast-growing companies · as of 2026 Q2
Share of the fund’s equity (by value) in companies whose trailing five-year revenue — or net-income — growth ranks in the top 25% of U.S. public companies. Foreign and newly-listed holdings are excluded, so the figure covers only part of the book. From SEC filings — not investment advice. How we measure this.
Latest quarter
What changed since the fund's previous filing
Return profile
Total return as filed — price change plus distributions reinvested · trailing figures to Apr 2026
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.
Holdings
By % of NAV · equity positions carry filed share counts · every resolvable issuer links to its company page
| Ticker | Issuer | %NAV | Reported price | Value | Shares |
|---|---|---|---|---|---|
| — | BlackRock Funds III | 1.58% | — | $37.75M | — |
| — | iShares Russell Mid-Cap ETF | 1.20% | $104.34 | $28.73M | 275.4K |
| SNDK | Sandisk CorpSNDK | 1.14% | $1,096.51 | $27.25M | 24.9K |
| WDC | Western Digital CorpWDC | 1.07% | $434.52 | $25.69M | 59.1K |
| GLW | Corning IncGLW | 0.93% | $164.24 | $22.28M | 135.7K |
| VRT | Vertiv Holdings CoVRT | 0.91% | $328.49 | $21.72M | 66.1K |
| PWR | Quanta Services IncPWR | 0.78% | $727.77 | $18.62M | 25.6K |
| — | BLACKROCK CASH FUNDS TREASURY SL AGENCY SHARES | 0.72% | — | $17.26M | — |
| HWM | Howmet Aerospace IncHWM | 0.71% | $243.04 | $16.93M | 69.7K |
| BNY | The Bank of New York Mellon CorpBNY | 0.67% | $134.37 | $16.08M | 119.7K |
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.
Top 10 positions are 9.72% of net assets, top 25 17.54%, across 795 issuers.
See more of this fund's book
More positions with filed share counts, and the quarter-over-quarter change list rather than the largest few — free with an account, no card required.
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