Index change event
S&P SmallCap 600 Additions & Index Changes: LEU & MFP – 2nd July 2026
On 2 July 2026, S&P Dow Jones Indices announced 4 index changes affecting 4 companies in the S&P SmallCap 600. The most notable move was Midera Food Processing joining the S&P SmallCap 600.
Announced
2026-07-02
Effective
July 7, 2026 at 5:00:00 PM
Indexes Affected
S&P SmallCap 600
4
Index Changes in Total
2
Additions
2
Deletions
0
Companies that changed index
What happened to the prices
By the next day's close, the 2 additions with price data had peaked at an average of +7.08%, against +0.78% for the 2 deletions. The largest mover was Centrus Energy, with a peak of +10.50%. 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.
Midera Food Processing went against the other addition: its next-day open was -0.03% from the post-announcement price, while the 2 additions averaged +1.60%.
In Short
4 index changes: 2 additions and 2 deletions.
No company moved between indexes, and the changes took effect on 2 dates.
Largest peak move: Centrus Energy, +10.50% 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 |
|---|---|---|---|---|
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
S&P SmallCap 600 Additions: Centrus Energy (LEU) and Midera Food Processing (MFP)
2 companies joined the S&P SmallCap 600 and 2 left, effective 8 and 14 July 2026. Centrus Energy and Midera Food Processing are new to the S&P family and Redwood Trust Inc and Whitestone REIT left the S&P family. The 2 additions with price data peaked at an average of +7.08% by the next day's close, led by Centrus Energy at +10.50%.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Centrus Energy | LEU | S&P SmallCap 600 | 07/14/2026 | |
Midera Food Processing | MFP | S&P SmallCap 600 | 07/08/2026 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
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 |
|---|---|---|---|---|---|---|---|---|---|---|
Centrus Energy | LEU | S&P SmallCap 600 | 162.13 | 162.74 | +2.32% | +2.91% | +2.99% | +3.22% | +10.50% | |
Midera Food Processing | MFP | S&P SmallCap 600 | 36.01 | -0.03% | +3.67% |
Not a Investment Advice
This page is research about past price behaviour. It is not a recommendation to buy or sell.