Announcement
Nasdaq disclosed that Astera Labs (NASDAQ:ALAB) and Rocket Lab (NASDAQ:RKLB) will be added to the Nasdaq‑100 Index as part of its June quarterly rebalance. The addition is scheduled to take effect before the market opens on June 22, 2026.
Share‑price reaction
In extended trading on Thursday, Astera Labs’ shares rose approximately 5 %, closing at $383.50. Rocket Lab’s stock surged nearly 11 %, ending at $126.95. Reuters‑cited ticker movements also showed RKLB+9.26 % and ALAB+11.07 % during the after‑hours session.
Index rebalance details
Alongside Astera Labs and Rocket Lab, the rebalance will introduce CoreWeave (NASDAQ:CRWV), Nebius Group (NASDAQ:NBIS) and Teradyne (NASDAQ:TER) to the Nasdaq‑100. The five departing constituents are Charter Communications (NASDAQ:CHTR), Cognizant Technology Solutions (NASDAQ:CTSH), Insmed (NASDAQ:INSM), Verisk Analytics (NASDAQ:VRSK) and Zscaler (NASDAQ:ZS).
Market implications
The Nasdaq‑100 tracks the largest non‑financial companies listed on the exchange; inclusion typically triggers portfolio adjustments by passive funds and exchange‑traded products, generating additional demand and liquidity for the newly added securities. The article notes that both Astera Labs and Rocket Lab have experienced strong share‑price appreciation over the past year, driven by investor enthusiasm for artificial‑intelligence infrastructure and commercial‑space activities, respectively.