Columbia Mid Cap Index Inst3 (CMDYX)

Fund Assets	2.32B
Expense Ratio	0.21%
Min. Investment	$2,000
Turnover	16.00%
Dividend (ttm)	0.20
Dividend Yield	1.37%
Dividend Growth	-4.47%
Payout Frequency	Semi-Annual
Ex-Dividend Date	Jun 22, 2026

Previous Close	14.58
YTD Return	11.66%
1-Year Return	14.86%
5-Year Return	45.00%
52-Week Low	13.60
52-Week High	15.81
Beta (5Y)	1.26
Holdings	404
Inception Date	Mar 1, 2017

About CMDYX

Columbia Mid Cap Index Fund Class I3 is a passively managed mutual fund designed to track the performance of the S&P MidCap 400 Index, a widely recognized benchmark for mid-sized U.S. companies. The fund primarily invests at least 80% of its net assets in common stocks that comprise the S&P MidCap 400, covering a diverse range of industries and sectors within the middle market segment. This approach provides investors with broad exposure to U.S. mid-cap equities, which are often characterized by a balance of growth potential and operational stability. The fund employs advanced technology and proprietary systems to replicate index returns efficiently, aiming for a close correlation with the benchmark. With a low expense ratio and a strategy centered on minimizing turnover, the fund appeals to investors seeking cost-effective and diversified access to mid-cap U.S. stocks. Since its inception in 2017, Columbia Mid Cap Index Fund Class I3 has played a role in portfolio diversification strategies, serving as a core equity holding for investors looking to capture mid-market growth while maintaining alignment with a major U.S. stock index.

• Fund Family: Columbia Threadneedle
• Category: Mid-Cap Blend
• Performance Rating: Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: CMDYX
• Share Class: Institutional 3 Class
• Index: S&P Mid Cap 400 TR

Performance

CMDYX had a total return of 14.86% in the past year, including dividends. Since the fund's inception, the average annual return has been 9.38%.

Other Share Classes

These are alternative share classes of the same fund, from the same provider.

Symbol	Share Class	Expense Ratio
NMPAX	Institutional Class	0.20%
CPXRX	Institutional 2 Class	0.20%
NTIAX	Class A	0.45%

Top 10 Holdings

9.11% of assets

Name	Symbol	Weight
E-mini S&P MidCap 400 Future Sept 26	n/a	1.41%
Columbia Short-Term Cash	n/a	1.22%
Twilio Inc.	TWLO	0.99%
Illumina, Inc.	ILMN	0.90%
TechnipFMC plc	FTI	0.86%
Everpure, Inc.	P	0.81%
Okta, Inc.	OKTA	0.80%
ATI Inc.	ATI	0.77%
nVent Electric plc	NVT	0.68%
Carpenter Technology Corporation	CRS	0.66%

Dividend History

Ex-Dividend	Amount	Pay Date
Jun 22, 2026	$0.69697	Jun 22, 2026
Dec 5, 2025	$0.92853	Dec 5, 2025
Jun 13, 2025	$0.3966	Jun 13, 2025
Dec 6, 2024	$1.18274	Dec 6, 2024
Jun 14, 2024	$0.46335	Jun 14, 2024
Dec 7, 2023	$0.69069	Dec 7, 2023

Data Sources: Tiingo, Twelve Data, and more

Historical data is provided by Tiingo. Delayed stock pricing data is provided by Twelve Data. Several fund data points are also provided by Finnhub.

Last checked:

Oct 16, 2026

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