Astera Labs, Rocket Lab Surge on Nasdaq‑100 Inclusion
Astera Labs (NASDAQ:ALAB) and Rocket Lab (NASDAQ:RKLB) experienced sharp after‑hours price gains on Thursday after Nasdaq announced that both companies would be added to the Nasdaq‑100 Index as part of its June quarterly rebalance. Astera Labs’ shares rose approximately 5% to $383.50, while Rocket Lab’s stock surged nearly 11% to $126.95.
Nasdaq disclosed that Astera Labs, Rocket Lab, CoreWeave (NASDAQ:CRWV), Nebius Group (NASDAQ:NBIS) and Teradyne (NASDAQ:TER) will become constituents of the Nasdaq‑100 before the market opens on June 22. These additions will replace five existing constituents: Charter Communications (NASDAQ:CHTR), Cognizant Technology Solutions (NASDAQ:CTSH), Insmed (NASDAQ:INSM), Verisk Analytics (NASDAQ:VRSK) and Zscaler (NASDAQ:ZS).
The Nasdaq‑100 tracks the largest non‑financial companies listed on the exchange, and inclusion typically triggers demand from passive funds and exchange‑traded products that rebalance their portfolios to match the benchmark. Consequently, newly added stocks often see increased liquidity and price appreciation.
Astera Labs, a provider of semiconductor connectivity solutions for artificial‑intelligence data centers, and Rocket Lab, a commercial space‑technology firm, have both enjoyed strong share‑price rallies over the past year, driven by investor enthusiasm for AI infrastructure and the commercial space sector respectively.
On the day of the announcement, the Nasdaq‑100 index itself was up 3.29%, with ticker‑specific gains reported as RKLB +9.25% and ALAB +10.99% in pre‑market data.
The article, authored by Ayushman Ojha and published on 12‑06‑2026 at 06:26 am, underscores the market‑moving impact of index rebalancing events on constituent equities.