Index change event
S&P 500, MidCap 400 & SmallCap 600 Additions & Index Changes: HONA, IESC, TOST, CAG & NHI – 23rd June 2026
On 23 June 2026, S&P Dow Jones Indices announced 12 index changes affecting 10 companies in the S&P 100, S&P 500, S&P MidCap 400 and S&P SmallCap 600. The most notable move was Honeywell Aerospace joining the S&P 100 and S&P 500.
Announced
2026-06-23
Effective
June 28, 2026 at 5:00:00 PM
Indexes Affected
S&P 100, S&P 500, S&P MidCap 400, S&P SmallCap 600
12
Index Changes in Total
6
Additions
6
Deletions
1
Companies that changed index
What happened to the prices
By the next day's close, the 4 additions with price data had peaked at an average of +5.99%, against +2.03% for the 6 deletions. The largest mover was Toast, with a peak of +7.89%. The moves are measured from the first extended-hours price after the announcement, except for 2 names with no recorded trade after 17:15 ET, measured from the 16:00 ET close.
Conagra Brands went against the other deletions: its next-day open was -0.37% from the post-announcement price, while the 6 deletions averaged +0.30%.
In Short
12 index changes: 6 additions and 6 deletions.
1 company moved from one S&P index to another, out of 10 in total.
Largest peak move: Toast, +7.89% by the next day's close.
The changes, index by index
An empty cell means the company was not in the S&P family before, or left it.
S&P 500 Additions: Honeywell Aerospace (HONA)
1 company joined the S&P 500 and 1 left, effective 29 and 30 June 2026. Honeywell Aerospace is new to the S&P family and Conagra Brands moved down to the S&P SmallCap 600. Honeywell Aerospace peaked at +5.71% by the next day's close.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Honeywell Aerospace | HONA | S&P 500 | 06/29/2026 |
S&P MidCap 400 Additions: IES Holdings (IESC) and Toast (TOST)
2 companies joined the S&P MidCap 400 and 2 left, effective 1 July 2026. IES Holdings and Toast are new to the S&P family and Janus Henderson Group and TopBuild Corp left the S&P family. The 2 additions with price data peaked at an average of +7.75% by the next day's close, led by Toast at +7.89%.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
IES Holdings | IESC | S&P MidCap 400 | 07/01/2026 | |
Toast | TOST | S&P MidCap 400 | 07/01/2026 |
S&P SmallCap 600 Additions: Conagra Brands (CAG) and National Health Investors (NHI)
2 companies joined the S&P SmallCap 600 and 2 left, effective 30 June 2026. Conagra Brands moved down from the S&P 500; National Health Investors is new to the S&P family; Apollo Commercial Real Estate Finance and Grid Dynamics Holdings left the S&P family. The 2 additions with price data peaked at an average of +1.96% by the next day's close, led by National Health Investors at +2.73%.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Conagra Brands | CAG | S&P 500 | S&P SmallCap 600 | 06/30/2026 |
National Health Investors | NHI | S&P SmallCap 600 | 06/30/2026 |
S&P 100 Additions: Honeywell Aerospace (HONA)
1 company joined the S&P 100 and 1 left, effective 29 and 30 June 2026. Honeywell Aerospace joined and Honeywell International left the S&P 100. Honeywell Aerospace peaked at +5.71% by the next day's close.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Honeywell Aerospace | HONA | S&P 100 | 06/29/2026 |
Price reaction
The close price is the last price before the announcement. Percentages are measured from the open price after the announcement, or from the close for a company with no price after it.
S&P 500 Additions Changes
Company | Ticker | Source Index | Final Index | Close Price | Open Price at Announcement | % Change +5 min | % Change +30 min | % Change at 20:00 Hrs | % Change by Next Day Open | % Highest Change by Next Day Close |
|---|---|---|---|---|---|---|---|---|---|---|
Honeywell Aerospace | HONA | S&P 500 | 245.00 | 0.00% | +5.71% |
S&P MidCap 400 Additions Changes
Company | Ticker | Source Index | Final Index | Close Price | Open Price at Announcement | % Change +5 min | % Change +30 min | % Change at 20:00 Hrs | % Change by Next Day Open | % Highest Change by Next Day Close |
|---|---|---|---|---|---|---|---|---|---|---|
IES Holdings | IESC | S&P MidCap 400 | 710.54 | 724.81 | +2.10% | +2.10% | +0.72% | +1.95% | +7.61% | |
Toast | TOST | S&P MidCap 400 | 24.51 | 24.57 | +3.85% | +3.64% | +3.80% | +2.67% | +7.89% |
S&P SmallCap 600 Additions Changes
Not a Investment Advice
Company | Ticker | Source Index | Final Index | Close Price | Open Price at Announcement | % Change +5 min | % Change +30 min | % Change at 20:00 Hrs | % Change by Next Day Open | % Highest Change by Next Day Close |
|---|---|---|---|---|---|---|---|---|---|---|
Conagra Brands | CAG | S&P 500 | S&P SmallCap 600 | 13.43 | 13.50 | 0.00% | +0.22% | -0.30% | -0.37% | +1.19% |
National Health Investors | NHI | S&P SmallCap 600 | 73.03 | 74.67 | 0.00% | +0.78% | +0.99% | +1.78% | +2.73% |
Not a Investment Advice
This page is research about past price behaviour. It is not a recommendation to buy or sell.