KLA Corporation stock gains on AI index inclusion and strong growth scores

Published on 09/21/2026 at 12:55 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

KLA Corporation stock shows a 45.7% gain in 2026 as of September 20, 2026, highlighting strong momentum in the AI-linked semiconductor space. The shares carry a Growth Score of 83 and Momentum Score of 74, underscoring continued investor interest.

Techniker in Schutzanzügen arbeiten an Halbleiter-Prüfmaschinen in blau beleuchtetem Reinraum — Fotorealistische Reinraumfertigung zeigt KLA Corporation ISIN US4824801009 mit Technikern an Halbleiter-Inspektionsmaschinen im Blaulicht, Illustration mit AI erstellt.

KLA Corporation stock (ISIN US4824801009) has advanced 45.7% in 2026 as of September 20, 2026, underscoring how closely investors are tying the equipment maker to the artificial intelligence buildout. According to AAII on September 20, 2026, the stock is also up 78.8% over the past year, signaling sustained demand from long-term holders.

AI index inclusion supports narrative

As Economic Daily News reported on September 21, 2026, a US 50 index focused on high-growth beneficiaries of AI, cybersecurity and semiconductors has added KLA Corporation as a new constituent alongside peers such as Palo Alto Networks and Texas Instruments. The inclusion reflects the index provider's view that KLA offers high growth potential within AI-related hardware, and helps to anchor incremental demand from benchmarked funds that must now hold the stock.

For investors, the index move matters because it reinforces a trend already visible in the share performance numbers. Per AAII on September 20, 2026, KLA carries a Growth Score of 83 and a Momentum Score of 74 on its scoring framework, placing the stock firmly in the high-growth, high-momentum quadrant compared with many semiconductor equipment peers.

Stock performance and valuation signals

According to AAII on September 20, 2026, KLA Corporation stock is up 2% over the previous five trading days, a modest pullback compared with the 78.8% gain over the past twelve months, which suggests that the recent consolidation has not materially dented the longer-term uptrend. The same overview notes that KLA has a Value Score of 7 on its 0 to 100 scale, categorizing the shares as ultra expensive relative to traditional value metrics, a point growth-oriented investors weigh against the robust AI-driven demand outlook.

Another data snapshot from AltIndex on September 20, 2026, lists KLA Corporation among its highlighted growth stocks with a reference price of USD 176.99 on its primary US exchange and a market capitalization of USD 218.7 billion as of that date. In the same table, the stock is assigned an AI Score of 80, which the platform uses to summarize alternative data and sentiment around the company.

AI infrastructure role and growth expectations

Beyond the price and valuation metrics, KLA's strategic positioning in AI infrastructure is a key part of the story. As Simply Wall St noted in a recent overview that KLA is one of the purest ways to gain exposure to the hardware behind AI data centers, thanks to its inspection and metrology systems that keep leading-edge AI chips on yield and on schedule as foundries move into more complex designs. This positioning is particularly relevant as chipmakers ramp up capacity for high-bandwidth memory and advanced packaging to serve AI workloads.

A Taiwanese financial report from TTV Finance on September 21, 2026, highlights that KLA Corporation estimates its process control systems revenue related to advanced packaging will reach about USD 1.1 billion in 2026, representing more than 70% year-on-year growth and exceeding its earlier expectations. For investors, that forecast underscores how quickly this niche within the broader semiconductor equipment market is expanding as customers invest in high-density packaging for AI chips.

Risks and investor considerations

The same Simply Wall St article points out that AI infrastructure stocks such as KLA face challenges from potentially higher interest rates and larger capital spending cycles, which can make their earnings more cyclical. An extended period of tighter monetary policy could weigh on valuation multiples, particularly for companies like KLA that already screen as expensive on traditional value metrics.

Balancing these factors, the combination of a 45.7% year-to-date gain as of September 20, 2026, a roughly 78.8% advance over twelve months, and an expected 70% plus growth in advanced packaging process control revenue in 2026 helps to explain why KLA Corporation stock has become a preferred vehicle for investors seeking targeted exposure to AI hardware, despite the risk that any slowdown in capital expenditure or change in rate expectations could pressure the shares.

Stock level and market snapshot

On its primary US exchange, KLA Corporation stock closed at USD 176.99 with a market capitalization of USD 218.7 billion as of September 20, 2026, according to data provided in the AltIndex growth-stock overview, placing the shares well above levels seen a year earlier and reflecting the strong AI-driven rally in semiconductor equipment names.