Fidelity Flex 500 Index Fund (FDFIX) is a Fidelity mutual fund with a 0.00% expense ratio, 503 holdings and $9.2B in net assets. Largest sector: Technology (39%).
Fee
0.00%
prospectus Apr 24, 2026
Net assets
$9.2B
Launched
Mar 9, 2017
Holdings
503
as of May 31, 2026
Top 10 weight
38.5%
largest ten holdings
Largest sector
Technology
39.1%
Yield
—
Benchmark
—
FDFIX's holdings are as of May 31, 2026 — a mutual fund reports its holdings to the SEC quarterly, one to three months after the date.
Not sold to the general public: offered only through certain Fidelity managed accounts and advisory programs, according to its prospectus.
Technology
39.1%
Financial Services
11.0%
Communication Services
10.5%
Consumer Cyclical
9.7%
Industrials
8.5%
Healthcare
8.3%
Consumer Defensive
4.4%
Energy
3.1%
Utilities
2.0%
Basic Materials
1.8%
Real Estate
1.7%
1
NVDA
NVIDIA
7.76%
2
AAPL
APPLE
6.93%
3
MSFT
MICROSOFT
5.06%
4
AMZN
AMAZON.COM
4.00%
5
GOOGL
ALPHABET
3.34%
6
AVGO
BROADCOM
3.20%
7
GOOG
ALPHABET CL C
2.67%
8
META
META PLATFORMS
2.09%
9
TSLA
TESLA
1.85%
10
MU
MICRON TECHNOLOGY
1.65%
11
LLY
ELI LILLY
1.32%
12
BRK.B
BERKSHIRE HATHAWAY
1.32%
13
AMD
ADVANCED MICRO DEVICES
1.27%
14
JPM
JPMORGAN CHASE
1.22%
15
XOM
EXXON MOBIL
0.92%
16
V
VISA
0.83%
17
JNJ
JOHNSON + JOHNSON
0.82%
18
INTC
INTEL
0.81%
19
WMT
WALMART
0.77%
20
CSCO
CISCO SYSTEMS
0.72%
21
COST
COSTCO WHOLESALE
0.64%
22
CAT
CATERPILLAR
0.62%
23
MA
MASTERCARD
0.61%
24
LRCX
LAM RESEARCH
0.60%
25
ABBV
ABBVIE
0.58%
1–25 of 503
Funds listed by how much of their largest holdings they share with FDFIX — not a ranking.
Data from Fidelity and its SEC filings; prices and returns from market data. Page updated October 29, 2026. Holdings and figures change over time. For information only — not investment advice.