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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsTwilio Inc. (NYSE: TWLO) is scheduled to join the S&P 500 before trading opens on Tuesday, October 6, 2026, replacing Warner Bros. Discovery Inc. (NASDAQ: WBD). S&P Dow Jones Indices announced the change on October 1, 2026.
When does Twilio join the S&P 500?
The change is scheduled to take effect before the U.S. market opens on Tuesday, October 6, 2026. The date and timing come from S&P Dow Jones Indices’ October 1 announcement.
Which companies are affected?
Twilio’s promotion is part of three linked constituent changes across S&P indexes, all scheduled before the October 6 market open:
| Index | Company leaving | Company joining |
|---|---|---|
| S&P 500 | Warner Bros. Discovery Inc. (NASDAQ: WBD) | Twilio Inc. (NYSE: TWLO) |
| S&P MidCap 400 | Twilio Inc. (NYSE: TWLO) | Formfactor Inc. (NASDAQ: FORM) |
| S&P SmallCap 600 | Formfactor Inc. (NASDAQ: FORM) | Workiva Inc. (NASDAQ: WK) |
The announcement lists Twilio in Information Technology and Warner Bros. Discovery in Communication Services. These are the sector classifications stated in the release.
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What does the announcement say about Twilio’s stock?
It announces index membership changes and their effective timing. It does not estimate how the change will affect Twilio’s share price, trading volume, or investor returns. Index inclusion alone is not a forecast or a guarantee of a particular market outcome.
For personal-finance decisions, treat the membership notice as information about an index change—not as a standalone reason to buy or sell TWLO shares.
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