Fidelity Flex 500 Index Fund
U.S. stock index fund · tracks Fidelity U.S. Large Cap Index
As of its 2026 Q2 report, Fidelity Flex 500 Index Fund held 507 positions with $9.20B in net assets. Its ten largest holdings made up 38.4% of the fund. The FDFIX share class costs 0% a year. Over the 12 months to May 2026, FDFIX returned 29.2%, with dividends reinvested. In 2026 Q2 it added 38 new positions and exited 42.
Fidelity Flex 500 Index Fund seeks to provide investment results that correspond to the total return of stocks of large capitalization U.S. companies.
The fund tracks the Fidelity U.S. Large Cap Index, a float-adjusted market capitalization-weighted index of the largest 500 U.S. companies, by holding securities included in that index. The fund also engages in securities lending to generate additional income.
What you own
| Company | Weight | Value | Shares | Reported price |
|---|---|---|---|---|
NVDANVIDIA CORP | 7.73% | $711.71M | 3.4M | $211.14 |
AAPLAPPLE INC | 6.91% | $635.53M | 2.0M | $312.06 |
MSFTMICROSOFT CORP | 5.04% | $463.83M | 1.0M | $450.24 |
AMZNAMAZON.COM INC | 3.98% | $366.74M | 1.4M | $270.64 |
GOOGLALPHABET INC | 3.33% | $306.74M | 806.5K | $380.34 |
AVGOBROADCOM INC | 3.19% | $293.84M | 657.7K | $446.77 |
GOOGALPHABET INC | 2.66% | $244.65M | 649.9K | $376.43 |
2.08% | $191.90M | 303.4K | $632.51 | |
TSLATESLA INC | 1.85% | $170.00M | 390.1K | $435.79 |
1.65% | $151.59M | 156.1K | $971.00 |
Reported price is the fund's own reported value divided by its own reported shares at 2026-05-31 — 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 | 99.66% |
| Bonds | 0.16% |
| Cash & short-term | 0.16% |
| Derivatives | 0.01% |
Derivatives are shown at market value, not notional exposure.
By sector
- Information Technology
- 38.0%
- Financials
- 10.9%
- Communication Services
- 10.2%
- Consumer Discretionary
- 9.4%
- 11 other sectors
- 31.5%
- Information Technology
- 38.0%
- Financials
- 10.9%
- Communication Services
- 10.2%
- Consumer Discretionary
- 9.4%
- Industrials
- 8.2%
- Health Care
- 8.1%
- Consumer Staples
- 4.4%
- Energy
- 3.1%
- International
- 2.1%
- Utilities
- 2.0%
- Real Estate
- 1.7%
- Materials
- 1.5%
- Government
- 0.2%
- Cash
- 0.2%
- Other
- 0.0%
How it has done
FDFIX share class · total returns with dividends reinvested
Volatility over the last 12 months: 13.12%. Past returns are a record, not a forecast.
Fees & fund details
Fidelity Flex 500 Index Fund is a U.S. equity index fund that tracks the Fidelity U.S. Large Cap Index. 22% of FDFIX’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
- 0.00%· FDFIX 0.00%
- Portfolio turnover
- 4.00% a year · as of 2026 Q2
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.
38 new· the largest 8
42 exited· the largest 8
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-05-31
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Fixed rate | 100.0% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 100.0% |
Based on what filers reported; a filer that never reported a flag also reads as none.
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 — FDFIX, QQQ and the fund in my 401(k)?”
- “How do this fund’s ten biggest holdings stack up against each other?”
- “For my target-date fund, what’s the real stock-and-bond mix once you look through it?”