Index change event
S&P SmallCap 600 Additions & Index Changes: FIVN – 29th July 2026
On 29 July 2026, S&P Dow Jones Indices announced 2 index changes affecting 2 companies in the S&P SmallCap 600. Five9 replaced Two Harbors Investment in the S&P SmallCap 600.
Announced
2026-07-29
Effective
August 2, 2026 at 5:00:00 PM
Indexes Affected
S&P SmallCap 600
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, Five9, the only addition with price data, had peaked at +7.49%, against +0.17% for Two Harbors Investment, 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: Five9 opened the next day at +0.93% and Two Harbors Investment at +0.17%, 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: Five9, +7.49% 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: Five9 (FIVN)
1 company joined the S&P SmallCap 600 and 1 left, effective 3 August 2026. Five9 is new to the S&P family and Two Harbors Investment left the S&P family. Five9 peaked at +7.49% by the next day's close.
Company | Ticker | Source Index | Final Index | Effective Date |
|---|---|---|---|---|
Five9 | FIVN | S&P SmallCap 600 | 08/03/2026 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
Five9 | FIVN | S&P SmallCap 600 | 27.17 | 27.91 | +3.01% | +3.01% | +3.91% | +0.93% | +7.49% |
Not a Investment Advice
This page is research about past price behaviour. It is not a recommendation to buy or sell.