Shares of Applied Optoelectronics, Inc. (AAOI) experienced a significant decline of 17% after comments from Meta CEO Mark Zuckerberg triggered uncertainty within the AI sector. The drop occurred on Thursday, marking one of the company's most challenging trading days of 2026.

AAOI opened at $120.95 on Friday, down sharply from earlier highs exceeding $140. Zuckerberg indicated that while Meta anticipates improved returns from AI investments in the coming months, the company's 2026 reorganization has not proceeded as smoothly as expected. This admission prompted a notable sell-off in stock values across several companies within the AI infrastructure space, including peer firms Lumentum and Coherent Corp.

Year-to-Date Performance Remains Strong

Despite Thursday's decline, AAOI's year-to-date performance remains robust. The stock is up over 205% in 2026 and has increased by more than 320% over the past year. In comparison, Nvidia has only seen a modest gain of around 3%. This substantial growth underscores AAOI's position as a valuable player in the field of high-speed optical transceivers used in AI data centers.

Institutional Interest Stays Strong

In light of the recent volatility, institutional investors continue to increase their stakes in AAOI. Ariose Capital Management reported acquiring 104,000 shares valued at approximately $8.8 million in the first quarter of 2026, making AAOI their sixth-largest investment. Other firms such as Allworth Financial and Northwestern Mutual Wealth Management are also reported to have initiated new positions.

Insider Selling Raises Concerns

Contrasting these positive institutional moves, insider trading has shown a different trend, with insiders selling 500,215 shares worth around $86.7 million over the past three months. Notably, Director Cynthia Delaney sold 56,575 shares, which represented a 48.68% reduction of her holdings. Insider ownership has now dwindled to just 3.80% of the company's total shares.

On the analyst front, consensus ratings for AAOI remain mixed, with a hold recommendation and an average price target of $113.80. However, Rosenblatt Securities maintains a buy rating, setting a price target of $220.