Alignment Healthcare Set to Join S&P SmallCap 600

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).

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.

Argus May 12 session

-2.38% close to close 2.0x rel. volume Open Argus

Details

News Market Reaction – ALGT

On May 12, the first trading day after this news, ALGT closed 2.38% below the previous close. That session’s volume was 2.0x the stock’s average daily volume.

Data tracked by StockTitan Argus for the May 12 session.

Key Figures

Index inclusion effective date: May 14, 2026

Index inclusion effective date

May 14, 2026

Date when ALHC joins and SNCY leaves S&P SmallCap 600

Historical Context

5 past events · Latest: Apr 30

5 events

1. Apr 30

   Q1 2026 earnings

   24h Move

   -0.8%

   Reported strong Q1 2026 revenue, EPS and liquidity with detailed guidance.

2. Apr 20

   Acquisition governance

   24h Move

   -5.3%

   Outlined post-acquisition board structure and expanded route network after SNCY deal.

3. Apr 16

   Earnings call schedule

   24h Move

   -4.5%

   Announced timing and access details for Q1 2026 earnings call webcast.

4. Apr 15

   Regulatory milestone

   24h Move

   -4.5%

   Received DOT interim exemption supporting separate operations post Sun Country acquisition.

5. Mar 31

   Shareholder rights review

   24h Move

   +5.8%

   Raised questions on whether ALGT, SNCY, CWAN are obtaining fair deals.

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

Key Terms

s&p smallcap 600, gics sector, dow jones industrial average

3 terms

s&p smallcap 600 financial

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

dow jones industrial average financial

"home to iconic financial market indicators, 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.

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

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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

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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

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

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.