AXT Inc. Surges After Being Added to S&P 600 Index

AXT Inc. (NASDAQ: AXTI) rose by as much as 16.4% on Monday after being added to the S&P 600 index, marking a significant milestone for increased exposure among institutional investors. The company joined nine others in replacing ten stocks from the index, triggering portfolio rebalancing activity that typically drives share price volatility. AXT Inc.'s recent performance was also bolstered by its recognition as one of five semiconductor beneficiaries in the co-packaged optics sector by Needham & Company. This follows strong Q2 results where AXT reported a net income of $13.03 million and revenue growth to $47.59 million, driven largely by demand for indium phosphide substrates used in data center optical connectivity. Institutional confidence remained robust despite fewer hedge fund holders during the second quarter; however, committed capital increased significantly to $487.9 million from $363.7 million as investors maintained a bullish outlook on AXTI's long-term growth potential.

By Angelica Ballesteros Mon, September 21, 2026 at 11:00 PM GMT+3 3 min read · Yahoo Finance ·

AXT Inc. Surges After Being Added to S&P 600 Index

Tickers: $ATRC $AXTI $BLDR

Topics: institutional_investment S&P_600_index stock_price

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