iShares Russell Mid-Cap Index Fund
Data updated: 2026-09-25
C000163604 — iShares Russell Mid-Cap Index Fund. United States Mid Cap Blend / Core Equity · $2.57B AUM. Holdings, fees, performance and SEC filings.
C000163604 Fund Overview
iShares Russell Mid-Cap Index Fund is a US mutual fund managed by Blackrock Funds, categorised as United States Mid Cap Blend / Core Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Blackrock Funds
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $2.57B
- 1-year return: 25.5%
- SEC CIK: 0000844779
- SEC series ID: S000049319
- Share class ID: C000163604
C000163604 Investment Objective and Strategy
iShares Russell Mid-Cap Index Fund describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Blackrock Funds.
Investment objective
"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."
Principal investment strategy
The Fund seeks to track the investment results of the Russell Midcap Index (the Underlying Index), which measures the performance of the mid-capitalization sector of the U.S. equity market. The Underlying Index is a float-adjusted, capitalization-weighted index of the 800 smallest issuers in the Russell 1000 Index. The Underlying Index includes equity securities issued by issuers with a median market cap of $7.71 billion as of October 31, 2018. Components primarily include financial services, consumer discretionary and technology companies, and may change over time. BlackRock uses a representative sampling indexing strategy to manage the Fund. Representative sampling is an indexing strategy that involves investing in a representative sample of securities that collectively has an investment profile similar to that of the Underlying Index.
The securities selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of the Underlying Index. The Fund may or may not hold all of the securities in the Underlying Index. The Fund generally invests at least 90% of its assets, plus the amount of any borrowing for investment purposes, in securities of the Underlying Index.
C000163604 Holdings
Top 10 holdings of iShares Russell Mid-Cap Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| BlackRock Funds III | 2.47% |
| iShares Russell Mid-Cap ETF | 0.72% |
| Snowflake Inc | 0.71% |
| Marathon Petroleum Corp | 0.67% |
| Cloudflare Inc | 0.63% |
| Datadog Inc | 0.63% |
| Phillips 66 | 0.61% |
| Royal Caribbean Cruises Ltd | 0.58% |
| Simon Property Group Inc | 0.53% |
| Blackrock Cash Funds Treasury Sl Agency Shares | 0.50% |
C000163604 Portfolio Allocation
Asset-class allocation of iShares Russell Mid-Cap Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.4% |
| Cash & Equivalents | 3.0% |
C000163604 Performance
Total returns for C000163604 (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 8.7% |
| 1 year | 25.5% |
| 3 years (annualised) | 15.9% |
| 5 years (annualised) | 7.4% |
C000163604 Risk Information
Risk metrics for C000163604, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.4%
C000163604 Costs and Fees
C000163604 costs about $36 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.36%
- Gross expense ratio: 0.36%
- Portfolio turnover: 17%
- Brokerage commissions: 0.35 bps of average net assets (SEC N-CEN)
C000163604 Cashflows
Over the 12 months to 2026-04, iShares Russell Mid-Cap Index Fund had net inflows of $57.51M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | $5.29M |
| 2026-03 | $9.96M |
| 2026-02 | $5.37M |
| 2026-01 | −$2.60M |
| 2025-12 | $93.48M |
| 2025-11 | $321.45K |
C000163604 Debt Constituents
No individual debt constituents are reported in iShares Russell Mid-Cap Index Fund's latest SEC N-PORT filing.
C000163604 Prospectus and SEC Filings
Official iShares Russell Mid-Cap Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2025-11-21
- Prospectus (485BPOS) — filed 2024-11-22
- Prospectus (485BPOS) — filed 2023-11-17
- Portfolio holdings (N-PORT) — filed 2026-09-25
- Portfolio holdings (N-PORT) — filed 2026-06-25
- Portfolio holdings (N-PORT) — filed 2026-03-26
- Annual census (N-CEN) — filed 2025-10-14
- Annual census (N-CEN) — filed 2024-10-11
Related Funds
Other United States Mid Cap Blend / Core Equity funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.