MM S&P 500 Index Fund
U.S. stock index fund · tracks S&P 500 Index
As of its 2026 Q2 report, MM S&P 500 Index Fund held 507 positions with $2.23B in net assets. Its ten largest holdings made up 36.3% of the fund. The MIEAX share class costs 0.64% a year. Over the 12 months to May 2026, MIEAX returned 29.0%, with dividends reinvested. In 2026 Q2 it added 10 new positions and exited 9.
The Fund seeks to provide investment results that correspond to the total return performance of publicly traded common stocks in the aggregate as represented by the S&P 500 Index.
The fund is passively managed to replicate the S&P 500 Index by holding equity securities of companies in the Index in weightings that approximate the Index's composition, and may use Index futures contracts to gain exposure or reduce it. BlackRock Investment Management, LLC makes day-to-day decisions to buy and sell securities in response to Index changes. Because the fund is subject to fees and transaction expenses while the Index is not, the fund's returns are likely to trail the Index.
What you own
| Company | Weight | Value | Shares | Reported price |
|---|---|---|---|---|
NVDANVIDIA Corp | 7.50% | $167.13M | 835.3K | $200.09 |
AAPLApple Inc | 6.58% | $146.57M | 506.5K | $289.36 |
MSFTMicrosoft Corp | 4.29% | $95.56M | 256.2K | $373.02 |
AMZNAmazon.com Inc | 3.61% | $80.46M | 337.6K | $238.34 |
GOOGLAlphabet Inc | 3.24% | $72.27M | 202.2K | $357.37 |
AVGOBroadcom Inc | 2.77% | $61.68M | 163.3K | $377.75 |
GOOGAlphabet Inc | 2.58% | $57.59M | 163.0K | $353.33 |
2.01% | $44.89M | 38.9K | $1,154.29 | |
1.91% | $42.66M | 75.7K | $563.29 | |
TSLATesla Inc | 1.83% | $40.84M | 97.1K | $420.60 |
Reported price is the fund's own reported value divided by its own reported shares at 2026-06-30 — not a live quote, and not what the fund paid.
The 200 largest of 507 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 | 99.38% |
| Cash & short-term | 0.61% |
| Derivatives | 0.00% |
Look-through blends 1 underlying fund; 0.0% of NAV was not looked through and stays direct-classified. The blend is as of 2025Q4, one or more quarters before the direct holdings (2026Q2).
By sector
- Information Technology
- 37.4%
- Financials
- 11.5%
- Communication Services
- 9.7%
- Consumer Discretionary
- 9.2%
- 10 other sectors
- 32.3%
- Information Technology
- 37.4%
- Financials
- 11.5%
- Communication Services
- 9.7%
- Consumer Discretionary
- 9.2%
- Health Care
- 8.7%
- Industrials
- 8.3%
- Consumer Staples
- 4.5%
- Energy
- 3.0%
- Utilities
- 2.2%
- International
- 2.1%
- Real Estate
- 1.8%
- Materials
- 1.4%
- Other
- 0.3%
- Cash
- 0.0%
How it has done
MIEAX share class · total returns with dividends reinvested
Volatility over the last 12 months: 13.14%. Past returns are a record, not a forecast.
Jun 2026 has been filed since the trailing figures were struck, so it is not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
The 7 share classes hold the same portfolio
| Share class | Expense ratio | 1 year | 3 years | 5 years | Worst fall |
|---|---|---|---|---|---|
| 0.64% | +28.95% | +76.32% | +92.95% | -7.88% | |
| 0.89% | +28.65% | +74.98% | +90.67% | -7.95% | |
| 0.39% | +29.26% | +77.80% | +95.60% | -7.75% | |
| 0.49% | +29.09% | +77.23% | +94.56% | -7.87% | |
| 0.24% | +29.43% | +78.39% | +97.01% | -7.81% | |
| 0.14% | +29.63% | +79.20% | +98.08% | -7.76% | |
| 0.74% | +28.81% | +75.90% | +92.25% | -7.94% |
These classes hold the same portfolio, so the 7.42pp spread over 5 years is the cost difference between them — roughly 1.48pp a year — not a difference in what they own.
Fees & fund details
MM S&P 500 Index Fund is a U.S. equity index fund that tracks the S&P 500 Index. 21% of MIEAX’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 97% of the fund’s equity).
- Asset class
- Equity
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
- Expense ratio, by class
- 0.14% – 0.89%· MIEAX 0.64%
- Portfolio turnover
- 5.00% a year · as of 2026 Q1
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.
10 new· the largest 8
9 exited· the largest 8
Understand how this fund fits with the rest.
Explore shared holdings, compare funds and follow their businesses with your connected AI:
- “Where do my funds overlap — MIEAX, QQQ and the fund in my 401(k)?”
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