Fidelity Mid Cap Growth Index Fund (FMDGX) is a Fidelity mutual fund with a 0.05% expense ratio, 267 holdings and $3.9B in net assets. Largest sector: Technology (32%).
Fee
0.05%
prospectus Aug 25, 2026
Net assets
$3.9B
Launched
Jul 17, 2019
Holdings
267
as of Jun 30, 2026
Top 10 weight
19.7%
largest ten holdings
Largest sector
Technology
32.2%
Yield
—
Benchmark
—
FMDGX's holdings are as of Jun 30, 2026 — a mutual fund reports its holdings to the SEC quarterly, one to three months after the date.
Technology
32.2%
Industrials
21.2%
Consumer Cyclical
13.2%
Healthcare
12.7%
Communication Services
5.0%
Financial Services
4.2%
Energy
3.9%
Utilities
2.6%
Real Estate
2.2%
Basic Materials
1.6%
Consumer Defensive
1.2%
1
DDOG
DATADOG CLASS A
2.34%
2
SNOW
Snowflake
2.34%
3
NET
Cloudflare Class A
2.12%
4
TER
TERADYNE
2.08%
5
ALAB
Astera Labs
2.03%
6
SPG
SIMON PROPERTY GROUP LP
1.96%
7
FIX
COMFORT SYSTEMS USA
1.89%
8
HOOD
ROBINHOOD MARKETS A
1.75%
9
LITE
LUMENTUM HOLDINGS
1.67%
10
TRGP
TARGA RESOURCES
1.56%
11
RKLB
Rocket Lab
1.50%
12
VST
VISTRA
1.46%
13
COR
CENCORA
1.45%
14
GWW
WW GRAINGER
1.39%
15
MCHP
MICROCHIP TECHNOLOGY
1.33%
16
ROK
ROCKWELL AUTOMATION
1.25%
17
TTWO
TAKE TWO INTERACTIVE SOFTWRE
1.25%
18
FAST
FASTENAL
1.24%
19
RCL
ROYAL CARIBBEAN CRUISES LTD
1.24%
20
CRDO
Credo Technology Group Holding Ltd.
1.23%
21
AXON
AXON ENTERPRISE
1.19%
22
CMG
CHIPOTLE MEXICAN GRILL
1.19%
23
ADSK
AUTODESK
1.12%
24
ALNY
Alnylam Pharmaceuticals
1.10%
25
JBL
JABIL
1.10%
1–25 of 267
Funds listed by how much of their largest holdings they share with FMDGX — 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.