Index change event
S&P MidCap 400 Additions & Index Changes: ENTG – 27th February 2025
On 27 February 2025, S&P Dow Jones Indices announced 2 index changes affecting 2 companies in the S&P MidCap 400. Entegris replaced Arcadium Lithium in the S&P MidCap 400.
Announced
2025-02-27
Effective
March 5, 2025 at 4:00:00 PM
Indexes Affected
S&P MidCap 400
2
Index Changes in Total
1
Additions
1
Deletions
0
Companies that changed index
What happened to the prices
By the next day's close, Entegris, the only addition with price data, had peaked at +4.85%, against +0.69% for Arcadium Lithium, the only deletion with price data. The moves are measured from the first extended-hours price after the 17:15 ET announcement.
With one addition and one deletion priced, there is no group to stand out from: Entegris opened the next day at +3.85% and Arcadium Lithium at +0.17%, both from the first price after the announcement.
In Short
2 index changes: 1 addition and 1 deletion.
No company moved from one S&P index to another in this announcement.
Largest peak move: Entegris, +4.85% 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.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
S&P MidCap 400 Additions: Entegris (ENTG)
1 company joined the S&P MidCap 400 and 1 left, effective 6 March 2025. Entegris is new to the S&P family and Arcadium Lithium left the S&P family. Entegris peaked at +4.85% by the next day's close.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Entegris | ENTG | S&P MidCap 400 | 03/06/2025 |
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Price reaction
The close price is the last price before the announcement. All percentages are measured from the open price after the announcement.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
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 |
|---|---|---|---|---|---|---|---|---|---|---|
Entegris | ENTG | S&P MidCap 400 | 97.48 | 99.98 | +4.82% | +4.30% | +3.69% | +3.85% | +4.85% |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
Not a Investment Advice
This page is research about past price behaviour. It is not a recommendation to buy or sell.