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The semiconductor sector has been under immense pressure lately, as evidenced by the 17% decline in the PHLX Semiconductor Sector index since the beginning of October. However, results from leading semiconductor companies clearly indicate that the sell-off is overdone.

Taiwan Semiconductor Manufacturing (TSM -0.61%), one of the world's most important semiconductor companies, just released its October sales figures, providing further evidence that the artificial intelligence (AI) build-out isn't slowing down. Let's see how TSMC fared in October before taking a look at some top semiconductor stocks that are worth buying following the recent sell-off.

Image source: Getty Images.

The AI chip boom will help TSMC sustain its incredible growth

TSMC's October revenue increased nearly 60% from the year-ago period. What's worth noting is that its growth has gained solid momentum lately. TSMC's revenue in July, August, and September increased by 45%, 53%, and 55%, respectively, compared to the respective year-ago periods.

TSM - Taiwan Semiconductor Manufacturing

$403.00-$2.49 (-0.61%)

NYSE · As of 9:46 AM ET 11/13/26

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Key data points

Market capMarket cap calculated using publicly traded shares outstanding only. Does not include unlisted, private, or dual-class non-traded shares. Implied market cap may vary.$2.10T

Day's range$401.73 - $408.09

52wk range$266.82 - $487.47

Volume1.6M

Avg volume11.5M

Gross margin65.07%

Dividend yield0.93%

It isn't surprising to see this acceleration in TSMC's growth. The company noted on its October earnings call that it is seeing "continued robust multi-year demand from our customers," driven by the growing adoption of agentic AI and open-source AI models. TSMC management further pointed out that the "value of semiconductors in the global supply chain is set to continue to increase," as chips will play an essential role in the AI build-out.

TSMC's revenue has increased by 43.3% in the first 10 months of 2026. The recent acceleration in growth suggests it could exceed its 2026 revenue growth target of 44%. Also, TSMC's long-term earnings per share (EPS) growth estimates have taken off this year.

TSM EPS LT Growth Estimates data by YCharts

That's why buying TSMC stock following its double-digit slide since October's beginning is a smart move, especially considering that it trades at an attractive 18 times forward earnings. However, this isn't the only chip stock that's benefiting from the AI boom. Let's take a closer look at another name worth buying right now.

This semiconductor company is essential to the AI build-out

TSMC management pointed out last month that it is on track to spend $60-$64 billion on capital expenditure this year. That will be a significant bump over its 2025 capital expenditure of $40.9 billion. The company sees its capital expenditure between 2026 and 2028 to be "significantly higher than the past three years."

This is great news for ASML Holding (ASML -0.10%), which manufactures the extreme ultraviolet (EUV) lithography machines that help TSMC build its advanced AI chips. ASML stock has dropped by more than 15% since the beginning of October. It now trades at 23 times forward earnings, lower than its five-year average forward price-to-earnings (P/E) ratio of 32.5.

That's quite attractive for a company that reported a 136% year-over-year increase in EPS in Q3 2026. Even better, ASML sees persistently strong demand for its chipmaking equipment over the coming years, outpacing its production capacity.

As a result, the company aims to increase the output of its EUV lithography systems by 30% in 2027. Management is exploring the possibility of increasing output by more than 30% in 2028. Given that ASML has a monopoly in EUV lithography, it can charge customers like TSMC a premium. So, it's not surprising that its long-term growth estimates have jumped significantly.

ASML EPS LT Growth Estimates data by YCharts

However, ASML could easily outpace those expectations. Its EPS jumped significantly in Q3, and it can sustain robust long-term growth due to its monopoly, higher capital spending by customers like TSMC, and continued investments in AI infrastructure.

Investors, therefore, can consider adding both ASML and TSMC to their portfolios, as they are well-positioned to capitalize on the AI-fueled chip boom over the long run and are trading at attractive levels.