Honeywell Aerospace Set to Join S&P 500 & S&P 100; Others to Join S&P MidCap 400 and S&P SmallCap 600

Rhea-AI Summary

S&P Dow Jones Indices announced multiple index changes effective June 29–July 1, 2026. Honeywell Aerospace (HONA) will join both the S&P 500 and S&P 100 as a spin-off from Honeywell International, while Conagra Brands (CAG), National Health Investors (NHI), Toast (TOST), and IES Holdings (IESC) move into new S&P indices. Apollo Commercial Real Estate Finance (ARI), Grid Dynamics (GDYN), TopBuild (BLD), and Janus Henderson (JHG) will be removed from their current indices.

Positive

• Honeywell Aerospace (HONA) added to S&P 500 and S&P 100
• Conagra Brands (CAG) moves into S&P SmallCap 600
• National Health Investors (NHI) added to S&P SmallCap 600
• Toast (TOST) added to S&P MidCap 400
• IES Holdings (IESC) added to S&P MidCap 400
• Honeywell International remains in S&P 500 as Honeywell Technologies

Negative

• Honeywell International (HON) deleted from S&P 100
• Conagra Brands (CAG) deleted from S&P 500
• Apollo Commercial Real Estate Finance (ARI) removed from S&P SmallCap 600
• Grid Dynamics (GDYN) removed from S&P SmallCap 600
• TopBuild (BLD) removed from S&P MidCap 400 ahead of acquisition
• Janus Henderson Group (JHG) removed from S&P MidCap 400

News Market Reaction – GDYN

-0.18%

-0.18% Session close to close

In the Jun 24 session, GDYN declined 0.18%, reflecting a mild negative market reaction.

Data tracked by StockTitan Argus on the day of publication.

Market Context

This announcement removes GDYN from the S&P SmallCap 600 after sustained weakness versus its 52‑week...

Analysis

This announcement removes GDYN from the S&P SmallCap 600 after sustained weakness versus its 52‑week high of $12.86. Prior news has produced mixed reactions; moderate short interest and recent insider net selling remain key risk factors to monitor.

Key Figures

Effective date: June 29, 2026 Effective date: June 30, 2026 Effective date: July 1, 2026 +4 more

7 metrics

Effective date June 29, 2026 Honeywell Aerospace added to S&P 500 and S&P 100

Effective date June 30, 2026 GDYN deleted from S&P SmallCap 600

Effective date July 1, 2026 Toast and IES Holdings join S&P MidCap 400

Index size S&P 500 Large‑capitalization benchmark index referenced for constituent changes

Index size S&P SmallCap 600 Small‑capitalization benchmark index from which GDYN is removed

Index size S&P MidCap 400 Mid‑capitalization benchmark index used in constituent reshuffle

Year first index 1884 Year Charles Dow created the first index mentioned in company background

Historical Context

5 past events · Latest: May 19 (Positive)

Pattern 5 events

Date	Event	Sentiment	24h Move	Catalyst
May 19	AI service launch	Positive	+3.5%	Launched AI‑native modernization service on Microsoft Azure targeting large enterprises.
Apr 20	AI client win	Positive	+0.7%	Showcased AI‑driven personalization for Galeries Lafayette with measurable revenue lift.
Apr 02	Earnings date set	Neutral	-1.4%	Announced timing of Q1 2026 earnings release and investor webcast details.
Mar 05	Earnings results	Positive	-7.1%	Reported record Q4 and 2025 revenues with double‑digit growth and 2026 guidance.
Feb 19	AI product launch	Positive	-2.6%	Introduced NVIDIA‑powered AI solution suite targeting cost reductions for clients.

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

Pattern Detected

GDYN’s news flow shows mixed reactions, with generally positive AI and customer updates sometimes met with selling, especially around larger fundamental disclosures like earnings.

Key Terms

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

4 terms

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

s&p midcap 400 financial

"Toast Inc. (NYSE: TOST) will replace TopBuild Corp. (NYSE: BLD) 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

"Conagra Brands will replace Grid Dynamics Holdings Inc.(NASD: GDYN) 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 technical

"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, June 23, 2026 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P 500, S&P 100, S&P MidCap 400, and S&P SmallCap 600: 

• Honeywell Aerospace Inc. (NASD: HONA) will be added to the S&P 500 & 100 on Monday, June 29. Honeywell Aerospace will replace Conagra Brands Inc. (NYSE: CAG) in the S&P 500, and Conagra Brands will replace Grid Dynamics Holdings Inc.(NASD: GDYN) in the S&P SmallCap 600 effective prior to the opening of trading on Tuesday, June 30. Honeywell Aerospace will replace Honeywell International Inc. (NASD: HON) in the S&P 100 effective prior to the opening of trading on Tuesday, June 30. Honeywell International is spinning off Honeywell Aerospace in a transaction expected to be completed on June 29. Post spin-off Honeywell International will be renamed Honeywell Technologies Inc. and will remain in the S&P 500. Honeywell Aerospace will be more representative of the mega capitalization space. Conagra Brands is more representative of the small capitalization space. Grid Dynamics Holdings is no longer representative of the small capitalization space.
  
  
• National Health Investors Inc. (NYSE: NHI) will replace Apollo Commercial Real Estate Finance Inc. (NYSE: ARI) in the S&P SmallCap 600 effective prior to the opening of trading on Tuesday, June 30. Apollo Commercial Real Estate Finance has announced ongoing liquidation activities and is no longer appropriate for the S&P SmallCap 600.
  
  
• Toast Inc. (NYSE: TOST) will replace TopBuild Corp. (NYSE: BLD) in the S&P MidCap 400 effective prior to the opening of trading on Wednesday, July 1. QXO Inc. (NYSE: QXO) is acquiring TopBuild in a deal expected to close soon, pending final closing conditions.
  
  
• IES Holdings Inc. (NASD: IESC) will replace Janus Henderson Group plc. (NYSE: JHG) in the S&P MidCap 400 effective prior to the opening of trading on Wednesday, July 1. Trian Fund Management LP and General Catalyst Group Management are acquiring Janus Henderson Group 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
June 29, 2026	S&P 100	Addition	Honeywell Aerospace	HONA	Industrials
June 30, 2026	S&P 100	Deletion	Honeywell International	HON	Industrials
June 29, 2026	S&P 500	Addition	Honeywell Aerospace	HONA	Industrials
June 30, 2026	S&P 500	Deletion	Conagra Brands	CAG	Consumer Staples
June 30, 2026	S&P SmallCap 600	Addition	Conagra Brands	CAG	Consumer Staples
June 30, 2026	S&P SmallCap 600	Deletion	Grid Dynamics Holdings	GDYN	Information Technology
June 30, 2026	S&P SmallCap 600	Addition	National Health Investors	NHI	Real Estate
June 30, 2026	S&P SmallCap 600	Deletion	Apollo Commercial Real Estate Finance	ARI	Financials
July 1, 2026	S&P MidCap 400	Addition	Toast	TOST	Financials
July 1, 2026	S&P MidCap 400	Deletion	TopBuild Corp	BLD	Consumer Discretionary
July 1, 2026	S&P MidCap 400	Addition	IES Holdings	IESC	Industrials
July 1, 2026	S&P MidCap 400	Deletion	Janus Henderson Group	JHG	Financials

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/honeywell-aerospace-set-to-join-sp-500--sp-100-others-to-join-sp-midcap-400-and-sp-smallcap-600-302808386.html

SOURCE S&P Dow Jones Indices

FAQ

What index changes are happening for Honeywell Aerospace (HONA) on June 29–30, 2026?

Honeywell Aerospace will join both the S&P 500 and S&P 100 in late June 2026. According to S&P Dow Jones Indices, HONA is being added as a spin-off from Honeywell International and is viewed as more representative of the mega-capitalization space.

How does the Honeywell International spin-off affect its S&P index membership (HON) in 2026?

Honeywell International will spin off Honeywell Aerospace and be renamed Honeywell Technologies. According to S&P Dow Jones Indices, the renamed company will remain in the S&P 500, while Honeywell Aerospace will take its place in the S&P 100 index.

Why is Apollo Commercial Real Estate Finance (NYSE: ARI) being removed from the S&P SmallCap 600 on June 30, 2026?

Apollo Commercial Real Estate Finance will be deleted from the S&P SmallCap 600 on June 30, 2026. According to S&P Dow Jones Indices, ARI has announced ongoing liquidation activities and is no longer considered appropriate for inclusion in the S&P SmallCap 600 index.

Which companies are joining the S&P MidCap 400 on July 1, 2026, and what are their tickers?

Toast (TOST) and IES Holdings (IESC) will join the S&P MidCap 400 on July 1, 2026. According to S&P Dow Jones Indices, Toast replaces TopBuild, while IES Holdings replaces Janus Henderson Group, reflecting pending acquisition transactions involving the deleted companies.

What change is occurring for Conagra Brands (CAG) in the S&P indices on June 30, 2026?

Conagra Brands will move from the S&P 500 to the S&P SmallCap 600 on June 30, 2026. According to S&P Dow Jones Indices, Conagra is now viewed as more representative of the small-capitalization space than of the large-cap S&P 500.

Which company will replace Apollo Commercial Real Estate Finance (ARI) in the S&P SmallCap 600 in June 2026?

National Health Investors (NHI) will replace Apollo Commercial Real Estate Finance in the S&P SmallCap 600 on June 30, 2026. According to S&P Dow Jones Indices, NHI will be added to the index’s real estate sector as ARI exits during its liquidation process.

How do the July 2026 S&P index changes relate to acquisitions of TopBuild (BLD) and Janus Henderson (JHG)?

TopBuild and Janus Henderson will be removed from the S&P MidCap 400 on July 1, 2026. According to S&P Dow Jones Indices, QXO is acquiring TopBuild and investor groups are acquiring Janus Henderson, prompting their deletion and replacement by Toast and IES Holdings.