Index change event
S&P 500 & SmallCap 600 Additions & Index Changes: FERG & ADIG – 31st July 2026
On 31 July 2026, S&P Dow Jones Indices announced 4 index changes affecting 4 companies in the S&P 500 and S&P SmallCap 600. The most notable move was Ferguson Enterprises joining the S&P 500.
Announced
2026-07-31
Effective
August 3, 2026 at 5:00:00 PM
Indexes Affected
S&P 500, 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 +12.64%, against +2.25% for the 2 deletions. The largest mover was ADI Global Distribution, with a peak of +17.20%. 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.
Electronic Arts went against the other deletion: its next-day open was +0.06% from the post-announcement price, while the 2 deletions averaged -0.91%.
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: ADI Global Distribution, +17.20% 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: Ferguson Enterprises (FERG)
1 company joined the S&P 500 and 1 left, effective 5 August 2026. Ferguson Enterprises is new to the S&P family and Electronic Arts left the S&P family. Ferguson Enterprises peaked at +8.09% by the next day's close.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Ferguson Enterprises | FERG | S&P 500 | 08/05/2026 |
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
S&P SmallCap 600 Additions: ADI Global Distribution (ADIG)
1 company joined the S&P SmallCap 600 and 1 left, effective 4 and 5 August 2026. ADI Global Distribution is new to the S&P family and Hertz Global Holdings left the S&P family. ADI Global Distribution peaked at +17.20% by the next day's close.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
ADI Global Distribution | ADIG | S&P SmallCap 600 | 08/04/2026 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
Ferguson Enterprises | FERG | S&P 500 | 234.33 | 238.77 | +7.95% | +6.89% | +5.96% | +5.54% | +8.09% |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
ADI Global Distribution | ADIG | S&P SmallCap 600 | 20.12 | +8.00% | +17.20% |
Not a Investment Advice
This page is research about past price behaviour. It is not a recommendation to buy or sell.