So, you know how sometimes a company announces it's selling more stock and investors immediately start selling theirs? That's exactly what happened to AXT Inc (AXTI) after the market closed on Monday.

The semiconductor materials company said it plans to offer and sell shares of common stock in a public offering. They're also giving the underwriters a 30-day option to buy up to an additional 15% of the shares. The company hasn't disclosed the size or terms yet, but the market's reaction was immediate and clear.

Here's the interesting part about why they're doing this: AXT expects to use the net proceeds primarily to financially support its subsidiary, Beijing Tongmei Xtal Technology Co. The goal is to increase capacity to produce indium phosphide substrates for export globally. These substrates are crucial components in things like fiber optics and certain semiconductor applications.

Now, here's what makes this move particularly noteworthy. AXT had approximately $120.27 million in total cash and cash equivalents as of December 31, 2025. That's not nothing. And the stock has been on an absolute tear - up more than 6,500% over the past year and up approximately 381% year-to-date. When a stock has run that much, any dilution tends to get extra scrutiny from investors.

The result? AXT shares were down 6.50% in after-hours trading on Monday, trading at $73.51 at the time of publication, according to market data. It's a classic case of the market voting with its feet on dilution, even when the stated purpose is expansion.