Vylor Added to the S&P 500; Twilio Set to Join S&P 500; Others to Join S&P MidCap 400 and S&P SmallCap 600

Vylor will change its Global Industry Classification Standard sector to Consumer Staples effective October 6.

Rhea-AI Summary

S&P Dow Jones Indices, a division of S&P Global (SPGI), announced index changes involving Workiva, Vylor, Twilio and other companies.

Vylor (VYLR) joined the S&P 500 on October 1, 2026, following its completed spin-off from Corteva. Before trading opens on October 6, Corteva (CTVA) leaves the S&P 500 for the S&P MidCap 400, replacing Olin (OLN), which replaces Qorvo (QRVO) in the S&P SmallCap 600. Twilio (TWLO) replaces Warner Bros. Discovery (WBD) in the S&P 500; Formfactor (FORM) replaces Twilio in the S&P MidCap 400; and Workiva (WK) replaces Formfactor in the S&P SmallCap 600.

Skyworks Solutions (SWKS) is acquiring Qorvo, and Paramount Skydance (PSKY) is acquiring Warner Bros. Discovery. Both deals are expected to close soon, pending final closing conditions. Paramount Skydance will move its primary listing to the NYSE after the merger.

Key Figures

Effective date: Oct. 6, 2026

Effective date

Oct. 6, 2026

FormFactor's S&P MidCap 400 addition and S&P SmallCap 600 deletion

Key Terms

spun off, gics

2 terms

spun off financial

"Corteva Inc (NYSE: CTVA) spun off Vylor in a transaction completed on that date."

A company action that turns part of a business into a separate, independent company by transferring assets and liabilities and issuing or distributing the new company's shares to the parent’s existing shareholders (or less commonly selling them). After a spin-off the spun‑off unit operates as its own legal and management entity with its own stock, distinct from the parent; this is different from a sell‑off (where the parent sells the business to an outside buyer) and from a split‑off or carve‑out (which involve shareholders exchanging shares or the parent taking an IPO of the unit rather than simply distributing shares).

gics technical

"Vylor will have a Global Industry Classification Standard (GICS) change to Consumer Staples"

GICS is the Global Industry Classification Standard, a widely used system that groups publicly traded companies into sectors and industries so investors can compare, track and build portfolios by business type. Think of it like supermarket aisles that organize products—GICS organizes companies, making it easier to see trends, measure performance, and manage diversification across areas such as technology, healthcare, or consumer goods.

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NEW YORK, Oct. 1, 2026 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P 500, S&P MidCap 400, S&P SmallCap 600: 

• Vylor Inc. (NYSE: VYLR) was added to the S&P 500 on October 1 when S&P 500 constituent Corteva Inc (NYSE: CTVA) spun off Vylor in a transaction completed on that date. Vylor replaces Corteva in the S&P 500. Corteva will replace Olin Corp (NYSE: OLN) in the S&P MidCap 400, and Olin will replace Qorvo, Inc (NASD: QRVO) in the S&P SmallCap 600 effective prior to the opening of trading on Tuesday, October 6. S&P 500 constituent Skyworks Solutions Inc. (NASD: SWKS) is acquiring Qorvo in a deal expected to be completed soon, pending final closing conditions. Vylor will have a Global Industry Classification Standard (GICS) change to Consumer Staples effective on October 6. Post spin-off, Corteva will be more representative of the mid-cap market space.
  
  
• S&P MidCap 400 constituent Twilio Inc. (NYSE: TWLO) will replace Warner Bros. Discovery, Inc. (NASD: WBD) in the S&P 500, S&P SmallCap 600 constituent Formfactor Inc. (NASD: FORM) will replace Twilio in the S&P MidCap 400, and Workiva Inc. (NYSE: WK) will replace Formfactor in the S&P SmallCap 600 effective prior to the opening of trading on Tuesday, October 6. S&P 500 constituent Paramount Skydance Corp. (NASD: PSKY) is acquiring Warner Bros. Discovery in a deal expected to be completed soon pending final closing conditions. Post merger, Paramount Skydance will switch its primary listing to the NYSE.

Following is a summary of the changes that will take place prior to the open of trading on the effective date:

Effective Date	Index Name	Action	Company Name	Ticker	GICS Sector
Oct 1, 2026	S&P 500	Addition	Vylor	VYLR	Consumer Staples
Oct 6, 2026	S&P 500	Deletion	Corteva	CTVA	Materials
Oct 6, 2026	S&P 500	Addition	Twilio	TWLO	Information Technology
Oct 6, 2026	S&P 500	Deletion	Warner Bros. Discovery	WBD	Communication Services
Oct 6, 2026	S&P MidCap 400	Addition	Formfactor	FORM	Information Technology
Oct 6, 2026	S&P MidCap 400	Deletion	Twilio	TWLO	Information Technology
Oct 6, 2026	S&P MidCap 400	Addition	Corteva	CTVA	Materials
Oct 6, 2026	S&P MidCap 400	Deletion	Olin	OLN	Materials
Oct 6, 2026	S&P SmallCap 600	Addition	Workiva	WK	Information Technology
Oct 6, 2026	S&P SmallCap 600	Deletion	Formfactor	FORM	Information Technology
Oct 6, 2026	S&P SmallCap 600	Addition	Olin	OLN	Materials
Oct 6, 2026	S&P SmallCap 600	Deletion	Qorvo	QRVO	Information Technology

ABOUT S&P DOW JONES INDICES

S&P Dow Jones Indices is the largest global resource for essential index-based concepts, data and research, and home to iconic financial market indicators, such as the S&P 500® and the Dow Jones Industrial Average®. More assets are invested in products based on our indices than products based on indices from any other provider in the world. Since Charles Dow invented the first index in 1884, S&P DJI has been innovating and developing indices across the spectrum of asset classes helping to define the way investors measure and trade the markets.

S&P Dow Jones Indices is a division of S&P Global (NYSE: SPGI), which provides essential intelligence for individuals, companies, and governments to make decisions with confidence. For more information, visit www.spglobal.com/spdji/en/.

FOR MORE INFORMATION:

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index_services@spglobal.com

Media Inquiries
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View original content:https://www.prnewswire.com/news-releases/vylor-added-to-the-sp-500-twilio-set-to-join-sp-500-others-to-join-sp-midcap-400-and-sp-smallcap-600-302896675.html

SOURCE S&P Dow Jones Indices

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

When will Workiva (WK) join the S&P SmallCap 600?

Workiva joins the S&P SmallCap 600 before trading opens on October 6, 2026, replacing Formfactor. Formfactor moves to the S&P MidCap 400.

When will Twilio (TWLO) join the S&P 500?

Twilio joins the S&P 500 before trading opens on October 6, 2026, replacing Warner Bros. Discovery. Formfactor replaces Twilio in the S&P MidCap 400.