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Index & Capital Markets · Market · 2026-10-26

Index & Capital Markets, October 26: S&P 500 changes, IPOs and new financing

Over the past four weeks 2 companies joined the S&P 500 and 0 left. Since 2016, stocks joining the index have averaged -0.3% against the S&P 500 in the month after the change (median -0.6%, 155 changes). 0 sizeable IPOs are on the calendar for the next month. 29 S&P 500 companies reported raising money in the past four weeks (27 new debt, 5 share sales). Historically, S&P 500 stocks moved -0.2% on average against the index around a filing reporting a new debt obligation (median -0.1%, 1,400 filings since 2016). Historically, S&P 500 stocks moved +0.6% on average against the index around a filing reporting an unregistered share sale (median +0.1%, 507 filings since 2016). These averages describe the past; any one company's reaction depends on why it is raising money and what it will do with it.

Joining and leaving the S&P 500

Return against the S&P 500 from the day before the change to the latest close.

CompanyChangeDateSectorSince, vs S&P 500
Vylor (VYLR)JoinedOct 1Consumer StaplesToo new to measure
Twilio (TWLO)JoinedOct 6Information Technology-11.1%

The IPO calendar

The largest US listings priced in the last two weeks or expected in the next month. Dates and terms often change.

CompanyDateExchangePriceDeal sizeStatus
Apex Treasury Corp II (APTTU)Oct 13Not yet listedNot yet priced$288 millionFiled
EuroSPAC Acquisition Corp.Oct 13Not yet listedNot yet priced$144 millionFiled
Creative Future Acquisition CorpOct 13Not yet listedNot yet pricedNot availableWithdrawn
Frazier Life Sciences Acquisition Corp. II (FLSC)Oct 14NASDAQ Capital$10.0$75 millionPriced
BIOVENTRIX, INC.Oct 14Not yet listedNot yet pricedNot availableWithdrawn
Iambic Therapeutics, Inc. (IAM)Oct 15NASDAQ Global Select$16.0$150 millionPriced
Amaero Inc. (AMRO)Oct 15NASDAQ Capital$4.3$20 millionPriced
CITY THERAPEUTICS, INC. (CTY)Oct 16NASDAQ Global$18.0$200 millionPriced
TCGX Acquisition Corp. II (TCXB)Oct 16NASDAQ Capital$10.0$100 millionPriced
Klook Technology LtdOct 16Not yet listedNot yet pricedNot availableWithdrawn
iStep Learning Ltd (ISTL)Oct 19Not yet listedNot yet priced$23 millionFiled
Kepuni Holdings Inc.Oct 19Not yet listedNot yet pricedNot availableWithdrawn
NODTHERA INC. (RZRA)Oct 21Not yet listedNot yet priced$100 millionFiled
Sensing4D AI LtdOct 21Not yet listedNot yet priced$34 millionFiled
DAVION HEALTHCARE PLC (DAVI)Oct 22NASDAQ GlobalNot yet pricedNot availablePriced

S&P 500 companies raising money

Form 8-K filings reporting a new debt obligation (item 2.0: notes, loans, credit lines) or a sale of shares not registered with the SEC (item 3.0). Reaction: the stock against the S&P 500 from the close before the filing to the close after it.

CompanyFiledWhat was filedReaction, vs S&P 500
CenterPoint (CNP)Oct 20New debt+1.1%
Live Nation (LYV)Oct 16New debt-0.1%
NiSource (NI)Oct 16New debt+4.6%
Norwegian Cruise (NCLH)Oct 15New debt+2.0%
Flex Ltd. (FLEX)Oct 14New debt-10.4%
Flex Ltd. (FLEX)Oct 13Share sale-13.3%
Skydance Corporation (SKYD)Oct 13New debt-21.8%
Illumina, Inc. (ILMN)Oct 13New debt-0.7%
Digital Realty (DLR)Oct 9New debt+0.9%
EQT Corp (EQT)Oct 7New debt+1.6%
Skyworks (SWKS)Oct 7New debt-1.8%
Vylor (VYLR)Oct 7New debt and Share sale+0.5%
Vylor (VYLR)Oct 7New debt+0.5%
Sysco (SYY)Oct 6New debt+0.2%
Cognizant (CTSH)Oct 6New debt-2.2%
Expand Energy (EXE)Oct 6New debt+1.6%
Skydance Corporation (SKYD)Oct 6New debt and Share sale-9.4%
Digital Realty (DLR)Oct 6New debt+0.0%
Vistra (VST)Oct 5New debt+13.4%
Flex Ltd. (FLEX)Oct 5New debt and Share sale+2.9%
Trimble (TRMB)Oct 2New debt-0.8%
Flex Ltd. (FLEX)Oct 2New debt+2.7%
Workday (WDAY)Oct 1New debt-3.2%
Wabtec (WAB)Oct 1New debt-0.8%
Tesla (TSLA)Sep 29New debt-0.3%
What does the model make of the newcomers?

Subscribers see where the model ranks every S&P 500 company, including the newest members, from their first day in the index.

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Index membership changes as recorded by Torvanta from public sources; IPO calendar from Finnhub; filings from SEC EDGAR; reactions from Torvanta's price data. Past reactions do not predict future ones. Research only, not investment advice or a recommendation to buy or sell any security. Rankings change as data changes and can be wrong. Torvanta and its founder may hold positions in securities discussed, and trade only after the information is published to all subscribers. Past performance does not guarantee future results.

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