AXT Inc. NASDAQ:AXTI, a compound semiconductor substrate manufacturer critical to AI data center optics, fell nearly 10% on June 24 as director insider sales and Chinese export permit uncertainty weighed on the stock.

Key Highlights

• AXT fell nearly 10% on June 24, extending selling pressure that began after director insider sales on June 22.

• Director insider sales totalling hundreds of thousands of dollars were disclosed on June 22, triggering a 13.5% single-day decline.

• The company reported a record order backlog exceeding $100 million alongside strong Q1 results.

• Geopolitical risk around Chinese export permits required by its Tongmei subsidiary remains a key investor concern.

AXT Inc. (NASDAQ:AXTI), a manufacturer of compound semiconductor substrates including indium phosphide critical to AI data center optical networking, fell nearly 10% on June 24 as selling pressure stemming from disclosed director insider sales persisted into a second consecutive session.

On June 22, AXT disclosed director insider sales totalling hundreds of thousands of dollars, triggering a decline of approximately 13.5% on that date. The June 24 session extended those losses as investors continued to reassess their positions in a stock that had surged more than 3,000% over the prior twelve months on surging demand for InP substrates used in high-speed optical transceivers.

The insider sales emerged against an otherwise constructive operational backdrop. AXT reported a record order backlog exceeding $100 million and delivered strong first-quarter results, reflecting robust underlying demand from data center optical networking programmes. However, investor caution has grown around the unpredictable timing of Chinese export permits required by AXT's Tongmei subsidiary to fulfil orders, a regulatory single-point-of-failure that introduces material execution risk regardless of demand strength.

The combination of insider selling and geopolitical overhang has created a more challenging near-term sentiment environment for a stock whose extraordinary prior-year performance had already priced in sustained execution.