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 – ROAD

+2.01% 3.2x vol

7 alerts

+2.01% Session close to close

+2.4% Peak in 1 hr 8 min

$5.87B Market Cap

3.2x Rel. Volume

In the Jul 17 session, ROAD gained 2.01%, reflecting a moderate positive market reaction. Argus tracked a peak move of +2.4% during that session. Our momentum scanner triggered 7 alerts that day, indicating moderate trading interest and price volatility. Trading volume was very high at 3.2x the daily average, suggesting strong buying interest.

Data tracked by StockTitan Argus on the day of publication.

Market Context

Platform data show generally positive one-day moves after ROAD news, plus low short positioning and ...

Analysis

Platform data show generally positive one-day moves after ROAD news, plus low short positioning and an effective S-3ASR shelf dated August 15, 2025. Against that backdrop, investors may weigh index inclusion against potential future use of the shelf and existing leverage when assessing the announcement.

Key Figures

Effective date: July 22, 2026 Index level: S&P MidCap 400 Index level: S&P SmallCap 600 +1 more

4 metrics

Effective date July 22, 2026 Index changes effective prior to open

Index level S&P MidCap 400 Molina Healthcare addition index

Index level S&P SmallCap 600 Construction Partners addition index

First index year 1884 Year Charles Dow invented first index

Historical Context

5 past events · Latest: Jul 14 (Neutral)

Pattern 5 events

Date	Event	Sentiment	24h Move	Catalyst
Jul 14	Earnings call scheduling	Neutral	+6.7%	Set date and time for fiscal 2026 Q3 earnings release and call.
Jul 13	Acquisition announcement	Positive	+3.8%	Completed Ellsworth Construction acquisition to expand Oklahoma asphalt and infrastructure footprint.
May 08	Quarterly earnings report	Positive	+6.9%	Reported strong Q2 FY2026 growth and record backlog with raised full-year guidance.
Apr 02	Earnings call scheduling	Neutral	+2.8%	Announced timing and access details for fiscal 2026 Q2 earnings release and call.
Apr 01	Acquisition announcement	Positive	-6.2%	Acquired Four Star Paving to deepen middle Tennessee presence and vertical integration.

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

Pattern Detected

Recent news for ROAD has usually been followed by positive one-day moves, with one acquisition headline drawing a negative reaction.

Key Terms

s&p midcap 400, s&p smallcap 600, s&p 500, dow jones industrial average

4 terms

s&p midcap 400 financial

"Effective prior to the opening of trading on Wednesday, July 22."

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

"and 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

dow jones industrial average financial

"such as the S&P 500® and the Dow Jones Industrial Average®."

A stock market index that tracks the share prices of a small group of large, well-known companies to give a quick snapshot of how the broader market is doing. Think of it like a thermometer for the stock market: it uses a handful of heavyweight firms as representative samples to show whether investor sentiment is rising or falling, which helps investors gauge market trends and compare performance over time.

View in glossary

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

ABOUT S&P DOW JONES INDICES

S&P Dow Jones Indices is the largest global resource for essential index-based concepts, data and research, and home to iconic financial market indicators, such as the S&P 500® and the Dow Jones Industrial Average®. More assets are invested in products based on our indices than products based on indices from any other provider in the world. Since Charles Dow invented the first index in 1884, S&P DJI has been innovating and developing indices across the spectrum of asset classes helping to define the way investors measure and trade the markets.

S&P Dow Jones Indices is a division of S&P Global (NYSE: SPGI), which provides essential intelligence for individuals, companies, and governments to make decisions with confidence. For more information, visit www.spglobal.com/spdji/en/.

FOR MORE INFORMATION:

S&P Dow Jones Indices
index_services@spglobal.com

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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.