Shares of Astera Labs (NASDAQ: ALAB) and Rocket Lab (NASDAQ: RKLB) climbed sharply in after-hours trading on Thursday after Nasdaq confirmed both companies will be added to the prestigious Nasdaq-100 Index during its June quarterly rebalancing.
Astera Labs, a leading provider of semiconductor connectivity solutions for artificial intelligence (AI) data centers, gained approximately 5% in extended trading, reaching $383.50 per share. Meanwhile, Rocket Lab, a prominent space technology and launch services company, jumped nearly 11% to $126.95 as investors reacted positively to the index inclusion news.
Nasdaq announced that Astera Labs, Rocket Lab, CoreWeave (NASDAQ: CRWV), Nebius Group (NASDAQ: NBIS), and Teradyne (NASDAQ: TER) will officially join the Nasdaq-100 before the market opens on June 22. The additions will replace Charter Communications (NASDAQ: CHTR), Cognizant Technology Solutions (NASDAQ: CTSH), Insmed (NASDAQ: INSM), Verisk Analytics (NASDAQ: VRSK), and Zscaler (NASDAQ: ZS).
The Nasdaq-100 Index tracks some of the largest non-financial companies listed on the Nasdaq Stock Market and serves as a benchmark for numerous exchange-traded funds (ETFs) and passive investment products. Inclusion in the index often generates increased demand for newly added stocks, as index-tracking funds are required to adjust their portfolios to reflect the updated composition.
For Astera Labs, the addition highlights its growing importance within the rapidly expanding AI infrastructure market. The company has benefited from strong demand for advanced connectivity solutions that support high-performance computing and AI-driven data centers.
Rocket Lab’s inclusion reflects increasing investor confidence in the commercial space industry. The company has experienced significant growth over the past year as demand for satellite launches, space systems, and aerospace technologies continues to rise.
The latest Nasdaq-100 rebalancing marks another major milestone for both companies. Their strong stock performance and expanding market presence have positioned them among the exchange’s most influential growth companies, reinforcing investor optimism surrounding artificial intelligence and the future of commercial space exploration.


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