===Boundless Bio (BOLD) and Serapha Bio to merge

 Boundless Bio (Nasdaq: BOLD) and privately-held Serapha Bio today announced that they have entered into a definitive merger agreement pursuant to which Serapha will combine with Boundless Bio in an all-stock merger. The latter’s shares leapt 75% to $2.5 on the news.

Prior to the closing, Boundless Bio expects to declare a cash dividend to pre-merger Boundless stockholders. Upon completion of the transaction, the combined company plans to operate under the name Serapha Bio, and is expected to trade on Nasdaq under the ticker symbol “AATD”.

Nasdaq-100 Index quarterly rebalancing

The Nasdaq-100 Index quarterly rebalancing goes into effect before the market opens on Monday, June 22, 2026. This adjustment introduces five new AI infrastructure and aerospace technology companies while removing five existing constituents to align with updated index methodology and market capitalization rankings. 

Additions to the Nasdaq-100

The following five companies will be added to the index, which will trigger buying pressure from institutional index-tracking funds:

• Astera Labs, Inc. (Nasdaq: ALAB)
• CoreWeave, Inc. (Nasdaq: CRWV)
• Nebius Group N.V. (Nasdaq: NBIS)
• Rocket Lab Corporation (Nasdaq: RKLB)
• Teradyne, Inc. (Nasdaq: TER) 

Removals from the Nasdaq-100

The following five companies will be removed from the index, resulting in forced selling from passive investment vehicles tracking the benchmark: 

• Charter Communications, Inc. (Nasdaq: CHTR)
• Cognizant Technology Solutions Corporation (Nasdaq: CTSH)
• Insmed Incorporated (Nasdaq: INSM)
• Verisk Analytics, Inc. (Nasdaq: VRSK)
• Zscaler, Inc. (Nasdaq: ZS) 

 

Index rebalancing

S&P Dow Jones Indices will make the following changes to the S&P 500, S&P MidCap 400, and S&P SmallCap 600 indices effective prior to the open of trading on Monday, June 22, 2026, to coincide with the quarterly rebalance. 

Effective date: June 22, 2026

Index Name	Action	Company Name	Ticker	GICS Sector
S&P 500	Addition	Marvell Technology	MRVL	Information Technology
S&P 500	Deletion	Pool Corp	POOL	Consumer Discretionary
S&P 500	Addition	Flex	FLEX	Information Technology
S&P 500	Deletion	The Campbell's Company	CPB	Consumer Staples
S&P MidCap 400	Addition	Roku	ROKU	Communication Services
S&P MidCap 400	Deletion	Flex	FLEX	Information Technology
S&P MidCap 400	Addition	Coeur Mining	CDE	Materials
S&P MidCap 400	Deletion	BellRing Brands	BRBR	Consumer Staples
S&P MidCap 400	Addition	Semtech	SMTC	Information Technology
S&P MidCap 400	Deletion	Coty	COTY	Consumer Staples
S&P MidCap 400	Addition	Sanmina	SANM	Information Technology
S&P MidCap 400	Deletion	Concentrix	CNXC	Industrials
S&P MidCap 400	Addition	Viavi Solutions	VIAV	Information Technology
S&P MidCap 400	Deletion	Blackbaud	BLKB	Information Technology
S&P SmallCap 600	Addition	Pool	POOL	Consumer Discretionary
S&P SmallCap 600	Deletion	Embecta	EMBC	Health Care
S&P SmallCap 600	Addition	The Campbell's Company	CPB	Consumer Staples
S&P SmallCap 600	Deletion	Universal Health Realty Trust	UHT	Real Estate
S&P SmallCap 600	Addition	Coty	COTY	Consumer Staples
S&P SmallCap 600	Deletion	Semtech	SMTC	Information Technology
S&P SmallCap 600	Addition	Concentrix	CNXC	Industrials
S&P SmallCap 600	Deletion	Sanmina	SANM	Information Technology
S&P SmallCap 600	Addition	Blackbaud	BLKB	Information Technology
S&P SmallCap 600	Deletion	Viavi Solutions	VIAV	Information Technology
S&P SmallCap 600	Addition	Credit Acceptance	CACC	Financials
S&P SmallCap 600	Deletion	Oxford Industries	OXM	Consumer Discretionary
S&P SmallCap 600	Addition	Lazard	LAZ	Financials
S&P SmallCap 600	Deletion	Gogo	GOGO	Communication Services
S&P SmallCap 600	Addition	Eastern Bankshares	EBC	Financials
S&P SmallCap 600	Deletion	PRA Group	PRAA	Financials
S&P SmallCap 600	Addition	Wesbanco	WSBC	Financials
S&P SmallCap 600	Deletion	Insteel Industries	IIIN	Industrials
S&P SmallCap 600	Addition	Warby Parker	WRBY	Consumer Discretionary
S&P SmallCap 600	Deletion	Ethan Allen Interiors	ETD	Consumer Discretionary
S&P SmallCap 600	Addition	Nicolet Bankshares	NIC	Financials
S&P SmallCap 600	Deletion	Cytek Biosciences	CTKB	Health Care
S&P SmallCap 600	Addition	Liquidia	LQDA	Health Care
S&P SmallCap 600	Deletion	Monro	MNRO	Consumer Discretionary
S&P SmallCap 600	Addition	Rush Street Interactive	RSI	Consumer Discretionary
S&P SmallCap 600	Deletion	Vital Farms	VITL	Consumer Staples
S&P SmallCap 600	Addition	United States Lime & Minerals	USLM	Materials
S&P SmallCap 600	Deletion	Cable One	CABO	Communication Services
S&P SmallCap 600	Addition	InvenTrust Properties	IVT	Real Estate
S&P SmallCap 600	Deletion	Forward Air	FWRD	Industrials