Artificial Intelligence (AI) stocks have dominated investor attention as a means to outperform the S&P 500. While some of these equities have delivered extraordinary short-term gains, others are rapidly forgotten following brief periods of underperformance.
The following three AI stocks have been largely overlooked by the broader market. Despite being smaller companies that have significantly outpaced the S&P 500, they currently trade more than 30% below their all-time highs. However, because their underlying fundamentals continue to strengthen, they are well-positioned for a rebound.
Penguin Solutions
Penguin Solutions (NASDAQ: PENG) is a memory-centric stock that develops essential products for AI infrastructure. Specifically, its Compute Express Link (CXL) technology enhances AI inference performance while offering lower costs compared to high-bandwidth memory (HBM) chips. This product retains memory from an HBM, preventing the memory chip from exhausting its storage prematurely.
The company possesses some slow-growth legacy businesses that obscure its substantial gains in the memory sector. Although a 48% year-over-year revenue growth rate in its fiscal 2026 third quarter is impressive, investors should focus on the Integrated Memory segment when evaluating results. This segment more than doubled year over year and surged by 60% sequentially.
Penguin Solutions’ other two segments experienced minor year-over-year growth and are not the primary drivers of value. Notably, Integrated Memory, which encompasses CXL products, constituted 57.5% of the company’s total revenue, a significant increase from 40.1% in fiscal 2025 Q3. As this segment continues to expand, it will represent a larger percentage of total revenue and elevate the company’s overall sales.
MaxLinear
MaxLinear (NASDAQ: MXL) has more than quadrupled this year but remains down by more than 30% from its all-time high. A 55% year-over-year revenue increase in Q2 was driven by surging demand for MaxLinear’s AI data center products.
CEO Kishore Seendripu attributed the successful results to the “strong momentum” in the company’s optical AI data center business, which more than doubled year over year. Revenue also grew by 23% sequentially.
The company’s Q3 guidance further excited investors, with an expected midpoint revenue of $215 million. This represents a 27% sequential improvement, demonstrating that the AI build-out is meaningfully accelerating MaxLinear’s business.
Seendripu specifically highlighted “the convergence of multiple growth drivers over the next two years,” signaling that these high growth rates are sustainable. While some investors have been taking profits, this may ultimately prove to be a mistake.
Aehr Test Systems
Aehr Test Systems (NASDAQ: AEHR) has been the strongest-performing growth stock of the group. It has nearly produced a 5x return this year and is down by more than 30% from its all-time high.
At first glance, its revenue figures appear modest relative to its market capitalization. Aehr Test Systems generated $50 million in its fiscal 2026, a slight decrease from $59 million in fiscal 2025, while trading at a $3 billion market cap. However, the company anticipates $130 million to $150 million in fiscal 2027 revenue, implying up to 3x year-over-year growth.
This is because the company specializes in test and burn-in solutions for semiconductor devices. Aehr runs these tests on chips to ensure they are defect-free when they reach customers. The company has attracted hyperscalers and chipmakers alike, as some tech giants are developing their own chips rather than relying exclusively on external chipmakers.
This demand materialized into a $22 million follow-on order from “a leading provider of advanced AI training and inference processors.”
Aehr CEO Gayn Erickson cited the “complexity of advanced AI semiconductor packages” as a key catalyst for rising demand. The company serves as a quiet play on the growing demand for semiconductors, a broad term that extends beyond AI chips to include central processing units (CPUs), memory chips, and network processors.
While the stock certainly trades at a high valuation, the projected revenue growth and long-term AI tailwinds provide investors with compelling reasons for excitement.