Index change event
S&P MidCap 400 Additions & Index Changes: ACI – 4th March 2025
On 4 March 2025, S&P Dow Jones Indices announced 2 index changes affecting 2 companies in the S&P MidCap 400. Albertsons Companies replaced Aspen Technology in the S&P MidCap 400.
Announced
2025-03-04
Effective
March 10, 2025 at 5:00:00 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, Albertsons Companies, the only addition with price data, had peaked at +4.98%, against +0.23% for Aspen Technology, the only deletion with price data. The moves are measured from the first extended-hours price after the announcement, except for 1 name with no recorded trade after 17:15 ET, measured from the 16:00 ET close.
With one addition and one deletion priced, there is no group to stand out from: Albertsons Companies opened the next day at +3.07% and Aspen Technology at +0.15%, both from the post-announcement price.
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: Albertsons Companies, +4.98% 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: Albertsons Companies (ACI)
1 company joined the S&P MidCap 400 and 1 left, effective 11 March 2025. Albertsons Companies is new to the S&P family and Aspen Technology left the S&P family. Albertsons Companies peaked at +4.98% by the next day's close.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Albertsons Companies | ACI | S&P MidCap 400 | 03/11/2025 |
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. 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 |
|---|---|---|---|---|---|---|---|---|---|---|
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 |
|---|---|---|---|---|---|---|---|---|---|---|
Albertsons Companies | ACI | S&P MidCap 400 | 19.76 | 19.89 | +3.92% | +3.82% | +2.56% | +3.07% | +4.98% |
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.