Alignment Healthcare Set to Join S&P SmallCap 600

Rhea-AI Summary

Alignment Healthcare (NASD: ALHC) will join the S&P SmallCap 600 effective before trading opens on May 14, 2026, replacing Sun Country Airlines Holdings (NASD: SNCY). The change follows Allegiant Travel (NASD: ALGT) agreeing to acquire Sun Country, pending final closing conditions.

Positive

• Alignment Healthcare (ALHC) added to S&P SmallCap 600 effective May 14, 2026
• Allegiant Travel (ALGT) acquisition of Sun Country expected to close, pending conditions

Negative

• None.

News Market Reaction – ALHC

+7.11% 1.9x vol

49 alerts

+7.11% News Effect

+10.0% Peak Tracked

-5.0% Trough Tracked

+$258M Valuation Impact

$3.88B Market Cap

1.9x Rel. Volume

On the day this news was published, ALHC gained 7.11%, reflecting a notable positive market reaction. Argus tracked a peak move of +10.0% during that session. Argus tracked a trough of -5.0% from its starting point during tracking. Our momentum scanner triggered 49 alerts that day, indicating elevated trading interest and price volatility. This price movement added approximately $258M to the company's valuation, bringing the market cap to $3.88B at that time. Trading volume was above average at 1.9x the daily average, suggesting increased trading activity.

Data tracked by StockTitan Argus on the day of publication.

Market Context

The stock moved +7.1% in the session following this news. A strong positive reaction aligns with the...

Analysis

The stock moved +7.1% in the session following this news. A strong positive reaction aligns with the visibility benefits of joining the S&P SmallCap 600. Historical data show that ALHC sometimes faced selling pressure even on strong fundamentals and offerings, so index-driven demand could mark a different dynamic. Investors may weigh increased passive ownership against existing selling from secondary offerings and insiders, as well as flexibility from an effective S-3 shelf.

Key Figures

Index effective date: May 14, 2026 Index name: S&P SmallCap 600 Replaced company: Sun Country Airlines Holdings +3 more

6 metrics

Index effective date May 14, 2026 Date ALHC enters S&P SmallCap 600

Index name S&P SmallCap 600 Target index for Alignment Healthcare inclusion

Replaced company Sun Country Airlines Holdings Removed from S&P SmallCap 600 on May 14, 2026

GICS sector Health Care Sector classification for ALHC in the index table

Industrials sector Industrials Sector classification for SNCY in the index table

Index invention year 1884 Year Charles Dow created the first index

Historical Context

5 past events · Latest: Apr 30 (Positive)

Pattern 5 events

Date	Event	Sentiment	24h Move	Catalyst
Apr 30	Q1 2026 earnings	Positive	-10.1%	Strong Q1 revenue and membership growth with raised 2026 guidance.
Apr 09	Earnings date set	Neutral	+0.3%	Announced timing and webcast details for Q1 2026 results call.
Apr 01	Conference appearance	Neutral	+1.3%	Participation in BofA Securities Health Care Conference 2026.
Mar 02	Secondary offering priced	Negative	-6.1%	Pricing of 13,167,733-share secondary sale by existing holder.
Mar 02	Secondary offering announced	Negative	-6.1%	Announcement of underwritten secondary offering by General Atlantic.

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

Pattern Detected

Recent history shows negative reactions to both strong earnings and secondary offerings, with modest positive moves on conference and scheduling news.

Recent Company History

Over the last few months, Alignment Healthcare reported strong Q1 2026 growth on Apr 30 yet saw a -10.12% reaction. Two secondary offerings disclosed on Mar 2 each coincided with a -6.11% move. By contrast, a BofA conference presentation on Apr 1 and an earnings date announcement on Apr 9 produced small gains. Today’s S&P SmallCap 600 addition follows this backdrop of selling into fundamentally positive updates and financings.

Key Terms

s&p smallcap 600, gics sector, s&p 500, dow jones industrial average, +1 more

5 terms

s&p smallcap 600 financial

"Alignment Healthcare Inc. (NASD: ALHC) will replace Sun Country... 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.

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.

s&p 500 financial

"home to iconic financial market indicators, such as the S&P 500® and the Dow Jones"

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

index-based financial

"largest global resource for essential index-based concepts, data and research"

Something described as "index-based" is tied to a market index — a broad list of stocks or bonds that represents a segment of the market — so its performance follows that index’s movements. For investors this matters because index-based funds or contracts offer an easy, low-cost way to get the same mix and risk exposure as the index, like buying a pre-mixed basket instead of choosing each ingredient, though returns can differ slightly due to fees or tracking differences.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

NEW YORK, May 11, 2026 /PRNewswire/ -- Alignment Healthcare Inc. (NASD: ALHC) will replace Sun Country Airlines Holdings Inc. (NASD: SNCY) in the S&P SmallCap 600 effective prior to the opening of trading on Thursday, May 14. S&P SmallCap 600 constituent Allegiant Travel Co. (NASD: ALGT) is acquiring Sun Country Airlines Holdings in a deal expected to close soon, pending final closing 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
May 14, 2026	S&P SmallCap 600	Addition	Alignment Healthcare	ALHC	Health Care
May 14, 2026	S&P SmallCap 600	Deletion	Sun Country Airlines Holdings	SNCY	Industrials

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

Media Inquiries
spdji.comms@spglobal.com

View original content:https://www.prnewswire.com/news-releases/alignment-healthcare-set-to-join-sp-smallcap-600-302768757.html

SOURCE S&P Dow Jones Indices

FAQ

When will Alignment Healthcare (ALHC) be added to the S&P SmallCap 600 index?

Alignment Healthcare will be added to the S&P SmallCap 600 before trading opens on May 14, 2026. According to S&P Dow Jones Indices, ALHC will replace Sun Country Airlines Holdings as part of a scheduled index change.

Which company is Alignment Healthcare (ALHC) replacing in the S&P SmallCap 600?

Alignment Healthcare is replacing Sun Country Airlines Holdings (SNCY) in the S&P SmallCap 600. According to S&P Dow Jones Indices, the change becomes effective prior to the market open on May 14, 2026, coinciding with index rebalancing.

Why is Sun Country Airlines (SNCY) being removed from the S&P SmallCap 600?

Sun Country Airlines is being removed because Allegiant Travel (ALGT) is acquiring the company. According to S&P Dow Jones Indices, the deal is expected to close soon, pending final closing conditions, prompting SNCY’s deletion from the index.

How is Allegiant Travel (ALGT) involved in the S&P SmallCap 600 changes on May 14, 2026?

Allegiant Travel, an existing S&P SmallCap 600 constituent, is acquiring Sun Country Airlines. According to S&P Dow Jones Indices, this pending acquisition leads to SNCY’s removal and Alignment Healthcare’s addition to maintain the index’s composition.

What sector will Alignment Healthcare (ALHC) represent in the S&P SmallCap 600 index?

Alignment Healthcare will represent the Health Care sector in the S&P SmallCap 600. According to S&P Dow Jones Indices, ALHC is being added as a Health Care company when it joins the index effective May 14, 2026.

What is the effective date of the S&P SmallCap 600 changes involving ALHC and SNCY?

The effective date for these index changes is May 14, 2026, before the market opens. According to S&P Dow Jones Indices, Alignment Healthcare will be added and Sun Country Airlines will be deleted on this date.