MM S&P 500® Index I (MMIZX)

Fund Assets	2.14B
Expense Ratio	0.146%
Min. Investment	$0.00
Turnover	5.00%
Dividend (ttm)	0.18
Dividend Yield	1.09%
Dividend Growth	-27.32%
Payout Frequency	Annual
Ex-Dividend Date	Dec 15, 2025

Previous Close	16.70
YTD Return	13.63%
1-Year Return	17.14%
5-Year Return	75.41%
52-Week Low	13.50
52-Week High	17.19
Beta (5Y)	1.00
Holdings	507
Inception Date	Dec 7, 2011

About MMIZX

MM S&P 500® Index Fund Class I is an institutional mutual fund designed to replicate the performance of the S&P 500 Index by investing in the equity securities of the index's constituent companies in proportion to their weightings. This fund aims to provide investors with broad exposure to the large-cap U.S. equity market, encompassing prominent sectors such as technology, consumer discretionary, healthcare, communication services, and financials. Its portfolio typically includes leading companies like Microsoft, Apple, NVIDIA, Amazon, and Alphabet, reflecting a diversified allocation within the large blend investment style. With a notably low expense ratio of 0.14%, the fund offers a cost-efficient way for investors to track the S&P 500's returns, which over various time horizons have closely matched the index’s own performance. This fund plays a significant role in passive investment strategies by providing a benchmark-based investment vehicle that supports diversification and market-level returns through an index-tracking approach.

• Fund Family: MassMutual
• Category: Large Blend
• Performance Rating: Above Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: MMIZX
• Share Class: Class I
• Index: S&P 500 TR

Performance

MMIZX had a total return of 17.14% in the past year, including dividends. Since the fund's inception, the average annual return has been 13.88%.

Equivalent Funds

These are funds that follow the same index from the other major fund companies.

Symbol	Provider	Name	Expense Ratio
FDFIX	Fidelity	Fidelity Flex 500 Index Fund	n/a
VFFSX	Vanguard	Vanguard 500 Index Institutional Select	0.01%
FLCPX	Fidelity	Fidelity SAI U.S. Large Cap Index Fund	0.02%
VFIAX	Vanguard	Vanguard 500 Index Fund Admiral Shares	0.04%
FXAIX	Fidelity	Fidelity 500 Index Fund	0.02%

Other Share Classes

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

Symbol	Share Class	Expense Ratio
MIEZX	Class R5	0.24%
MMIEX	Service Class	0.39%
MIEYX	Administrative Class	0.49%
MIEAX	Class R4	0.64%

Top 10 Holdings

36.32% of assets

Name	Symbol	Weight
NVIDIA Corporation	NVDA	7.50%
Apple Inc.	AAPL	6.57%
Microsoft Corporation	MSFT	4.29%
Amazon.com, Inc.	AMZN	3.61%
Alphabet Inc.	GOOGL	3.24%
Broadcom Inc.	AVGO	2.77%
Alphabet Inc.	GOOG	2.58%
Micron Technology, Inc.	MU	2.01%
Meta Platforms, Inc.	META	1.91%
Tesla, Inc.	TSLA	1.83%

Dividend History

Ex-Dividend	Amount	Pay Date
Dec 15, 2025	$2.51943	Dec 16, 2025
Dec 13, 2024	$4.67612	Dec 16, 2024
Dec 13, 2023	$1.11527	Dec 14, 2023
Dec 14, 2022	$4.29142	Dec 15, 2022
Dec 16, 2021	$2.81974	Dec 17, 2021
Dec 14, 2020	$3.04041	Dec 15, 2020

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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