Molina Healthcare Set to Join S&P MidCap 400 and Construction Partners to Join S&P SmallCap 600

Rhea-AI Summary

Molina Healthcare (NYSE: MOH), currently in the S&P SmallCap 600, will join the S&P MidCap 400, replacing National Storage Affiliates Trust (NYSE: NSA), effective before the market opens on Wednesday, July 22, 2026. At the same time, Construction Partners (NASD: ROAD) will enter the S&P SmallCap 600, replacing Molina Healthcare in that index.

According to S&P Dow Jones Indices, these changes are tied to S&P 500 constituent Public Storage (NYSE: PSA) acquiring National Storage Affiliates Trust, with the deal expected to close on or about the effective date, subject to final conditions.

Positive

• Molina added to S&P MidCap 400 effective July 22, 2026
• Index role change linked to PSA–NSA transaction highlighting Molina’s placement in a larger-cap index universe

Negative

• Molina removed from S&P SmallCap 600 effective July 22, 2026

News Market Reaction – NSA

-2.09%

-2.09% Session close to close

In the Jul 17 session, NSA declined 2.09%, reflecting a moderate negative market reaction.

Data tracked by StockTitan Argus on the day of publication.

Market Context

With NSA trading about 2.19% below its 52-week high and short interest data categorized as low, the ...

Analysis

With NSA trading about 2.19% below its 52-week high and short interest data categorized as low, the index deletion mainly interacts with existing merger expectations.

Key Figures

Index change effective date: July 22, 2026

1 metrics

Index change effective date July 22, 2026 Effective prior to the open for S&P index membership changes

Historical Context

5 past events · Latest: Jul 14 (Positive)

Pattern 5 events

Date	Event	Sentiment	24h Move	Catalyst
Jul 14	Acquisition approval	Positive	-1.5%	Shareholders approved acquisition by Public Storage ahead of expected July 22 closing.
May 14	Dividend declaration	Positive	-3.5%	Board declared Q2 2026 common and preferred cash dividends with set payment date.
May 05	Earnings and merger	Positive	+3.5%	Q1 2026 beat metrics and announced all-stock merger with Public Storage.
Apr 27	Peer earnings update	Neutral	-2.3%	Public Storage reported Q1 2026 and reaffirmed guidance, highlighting NSA acquisition plans.
Apr 16	Earnings date notice	Neutral	+2.5%	NSA scheduled Q1 2026 earnings release timing without a conference call.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Pattern Detected

Recent NSA headlines tied to the Public Storage transaction have produced mixed one-day moves, with slightly more instances of negative reactions to otherwise constructive news.

Key Terms

s&p midcap 400, s&p smallcap 600, s&p 500, gics sector

4 terms

s&p midcap 400 financial

"Molina Healthcare Inc. (NYSE: MOH) will replace National Storage Affiliates Trust (NYSE: NSA) in the S&P MidCap 400"

The S&P MidCap 400 is a group of 400 companies that are smaller than the big, well-known corporations but larger than tiny startups. It helps investors see how medium-sized companies are performing in the stock market, acting like a barometer for this middle-sized group of businesses.

s&p smallcap 600 financial

"Construction Partners Inc. (NASD: ROAD) will replace Molina Healthcare in the S&P SmallCap 600"

A stock market index made up of 600 small-cap U.S. companies chosen to represent the performance of smaller publicly traded firms. It matters to investors because it acts like a temperature gauge for the small-company segment of the market, serving as a benchmark for fund managers, a basis for index funds and ETFs, and a way to compare returns and risk when building a diversified portfolio.

s&p 500 financial

"S&P 500 constituent Public Storage (NYSE: PSA) is acquiring National Storage Affiliates Trust"

The S&P 500 is a broad stock market index that tracks the performance of 500 large U.S. companies, weighted so bigger firms have a larger impact. Investors use it like a thermometer or benchmark to judge how the overall U.S. stock market or a portfolio is doing; movements in the index influence investor sentiment, fund performance, and many passive investment products that aim to match its returns.

View in glossary

gics sector financial

"Effective Date | Index Name | Action | Company Name | Ticker | GICS Sector"

GICS sector is one of the major industry groupings from the Global Industry Classification Standard, a system that sorts companies into consistent categories (like Technology or Health Care) based on the primary business they do. Investors use these sectors like folders in a filing cabinet to compare companies, build diversified portfolios, and track how whole parts of the market are performing rather than focusing on single stocks.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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NEW YORK, July 16, 2026 /PRNewswire/ -- S&P SmallCap 600 constituent Molina Healthcare Inc. (NYSE: MOH) will replace National Storage Affiliates Trust (NYSE: NSA) in the S&P MidCap 400, and Construction Partners Inc. (NASD: ROAD) will replace Molina Healthcare in the S&P SmallCap 600 effective prior to the opening of trading on Wednesday, July 22. S&P 500 constituent Public Storage (NYSE: PSA) is acquiring National Storage Affiliates Trust in a deal that is expected to be completed on or about that date pending final conditions.

Following is a summary of the changes that will take place prior to the open of trading on the effective date:

Effective Date		Index Name	Action	Company Name	Ticker	GICS Sector
July 22, 2026	S&P MidCap 400		Addition	Molina Healthcare	MOH	Health Care
July 22, 2026	S&P MidCap 400		Deletion	National Storage Affiliates Trust	NSA	Real Estate
July 22, 2026	S&P SmallCap 600		Addition	Construction Partners	ROAD	Industrials
July 22, 2026	S&P SmallCap 600		Deletion	Molina Healthcare	MOH	Health Care

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View original content:https://www.prnewswire.com/news-releases/molina-healthcare-set-to-join-sp-midcap-400-and-construction-partners-to-join-sp-smallcap-600-302828046.html

SOURCE S&P Dow Jones Indices

FAQ

When will Molina Healthcare (NYSE: MOH) join the S&P MidCap 400 index?

Molina Healthcare will join the S&P MidCap 400 before the market opens on July 22, 2026. According to S&P Dow Jones Indices, Molina will replace National Storage Affiliates Trust as part of a scheduled index rebalancing.

Why is Molina Healthcare (MOH) moving from the S&P SmallCap 600 to the S&P MidCap 400 in July 2026?

Molina Healthcare is moving to the S&P MidCap 400 as it replaces National Storage Affiliates Trust. According to S&P Dow Jones Indices, this change is related to Public Storage’s planned acquisition of National Storage Affiliates Trust around July 22, 2026.

What happens to Molina Healthcare’s listing in the S&P SmallCap 600 after July 22, 2026?

Molina Healthcare will be deleted from the S&P SmallCap 600 on July 22, 2026. According to S&P Dow Jones Indices, Construction Partners (ticker ROAD) will be added to the S&P SmallCap 600 in Molina’s place on that date.

Which company will Molina Healthcare (MOH) replace in the S&P MidCap 400 index?

Molina Healthcare will replace National Storage Affiliates Trust (NSA) in the S&P MidCap 400. According to S&P Dow Jones Indices, NSA will be removed as S&P 500 constituent Public Storage is acquiring National Storage Affiliates Trust, pending final conditions.

How is Public Storage’s acquisition of National Storage Affiliates Trust affecting Molina Healthcare’s index status (MOH)?

Public Storage’s planned acquisition of National Storage Affiliates Trust triggers changes to S&P indices. According to S&P Dow Jones Indices, Molina Healthcare moves into the S&P MidCap 400, taking NSA’s slot, while leaving the S&P SmallCap 600.