KLA Short Interest Holds at 18.5% as Stock Rebounds Into Thursday's Print

KLA Corporation bounced 3.3% on Wednesday to $158.77, but short sellers are not retreating: 24.4 million shares remain borrowed against the float, keeping short interest at 18.5%, one of the heavier bearish positions across semiconductor equipment.

The short interest figure has been broadly stable for two weeks, oscillating in a narrow band between 23.4 million and 24.9 million shares after a sharp drop from around 29.5 million in late September. That September-to-October reduction of roughly 16% coincided almost exactly with the stock's own 15.5% decline over the same period, suggesting short sellers took profits into weakness rather than adding conviction. Cost to borrow has tripled since September, reaching 1.47%, but the borrow market itself remains entirely unconstrained: with 1.3 billion shares available against 24 million borrowed, there is no squeeze pressure of any kind. Wednesday's price recovery looks more like sector-level relief than a squeeze, with peers AMAT up 2.2%, LRCX up 1.4%, UCTT up 10.2%, and ONTO up 5.2% on the day.

The debate around KLA centres on one number: China. Bears note that China accounts for over 30% of revenue, and any further export controls or inventory correction there could materially reduce demand just as domestic rivals gain ground. The stock's 30x multiple on forward earnings also weighs on the bear case, well above its five-year average of 21x, which limits room for guidance disappointment. Bulls point to KLA's structural position in process control, where the company holds dominant share and where inspection intensity rises with each new node. Management raised its 2026 wafer-front-end equipment forecast to above $140 billion and set revenue guidance above $15 billion for the calendar year. Analysts broadly maintained positive ratings after the July print, though Morgan Stanley lowered its target to $227 from $253 earlier this month, and the mean Street target of $232 implies roughly 46% upside from Wednesday's close. The EPS momentum scores are weak, ranking in the 33rd to 37th percentile over the past 30 to 90 days, reflecting that estimate revisions have been running against the stock.

The July quarter was the most recent comparable data point: the stock fell 16.3% on the day of that release and recovered only partially, ending the five-day period 3.9% below where it started. Wikipedia page views for KLA are running at a z-score of 1.7 against the company's own 90-day history as of October 21, indicating that retail attention has picked up into this print.

Thursday's report will test whether KLA's China revenue held up through the quarter and whether management's forward commentary on 2027 memory and leading-edge spending is strong enough to justify a multiple that already prices in recovery.