---
title: "KLA says optical parts pace its shipments; Coherent and Lumentum report November 4 and 5"
description: "KLA beat and guided higher, then told investors on the same call that optical parts pace its shipments and memory prices defer its margin recovery. Coherent reports November 4 and Lumentum November 5, and those two prints decide whether the constraint story holds."
publisher: "The Inference"
section: "Chips"
published: 2026-11-01T14:18:01.003Z
modified: 2026-11-01T14:18:01.003Z
canonical: https://theinference.org/article/kla-says-optical-parts-pace-its-shipments-coherent-and-lumentum-report-november-4-and-5
language: en
keywords: "KLA, Chip Equipment, Optics, Semiconductors, Earnings, Guidance"
---

# KLA says optical parts pace its shipments; Coherent and Lumentum report November 4 and 5

> KLA beat and guided higher, then told investors on the same call that optical parts pace its shipments and memory prices defer its margin recovery. Coherent reports November 4 and Lumentum November 5, and those two prints decide whether the constraint story holds.

[KLA](https://theinference.org/markets/companies/kla) makes the inspection machines that tell a chipmaker whether its chips actually work, and on October 28 it [reported record September-quarter revenue of $4.14 billion](https://x.com/wallstengine/status/2115536340850819373), up 29% year on year, beating the $4.04 billion consensus [1][2]. The December guide was stronger still: $4.7 billion plus or minus $200 million against $4.54 billion expected, with adjusted earnings per share of $1.44 against $1.36 expected [1][2]. Growth is reaccelerating, and the quarter itself was not the problem.

![A KLA engineer in a cleanroom suit servicing an inspection tool](https://storage.googleapis.com/theinference-public/img/fcff43df19cd0e82.jpg)

*A KLA engineer services an inspection system. The machines pace shipments on high-end optical components the company buys, not makes. (Courtesy of KLA)*

*Chart: **KLA revenue jumped 29% last quarter after three quarters of slower growth** Line chart of KLA quarterly revenue from the December 2024 quarter to the September 2026 quarter, rising from $3.08B to $4.14B.*

*Quarterly revenue in USD billions, calendar quarters, from KLA SEC filings; September 2026 quarter is the record. Source: [9]. [9]*

## The pacing item is a part KLA buys, not sells

The complication came from KLA's own call. Lead times average about 12 months, with high-end optical components [the primary pacing item for shipping systems](https://finance.yahoo.com/markets/stocks/articles/kla-corporation-q1-2027-earnings-123000658.html) [3]. High memory prices inside its image-processing systems are a headwind, so the 62.5% non-GAAP gross margin (adjusted, excluding certain costs) guided for December does not return to the 63-64% target range until the second half of 2027 [2][3]. The company that inspects everyone else's supply chain cannot fully control its own inputs.

*Chart: **Gross margin has climbed for two years but still sits below the 63-64% target** Line chart of KLA quarterly gross margin from the June 2024 quarter to the September 2026 quarter, rising from 60.7% to 61.9%, with a December 2026 guide of 62.5% still under the 63-64% target line.*

*Gross margin, percent of revenue, calendar quarters, GAAP from KLA SEC filings; Q4 '26* is the company's December-quarter guide (non-GAAP), not a reported figure. Source: [9], guidance from [2][3]. [9]*

## The 5.7% drop repriced the margin and shipping timeline, not the demand forecast

On October 30 [KLAC fell 5.7%](https://www.gurufocus.com/news/9160065/kla-corp-klac-shares-fall-57-what-gf-score-of-93-tells-investors) [5]. KLA raised its 2026 wafer-equipment forecast to about the mid-$150 billions and expects the 2027 market above $200 billion [3]; its advanced-packaging process-control revenue is on track for roughly $1.1 billion in 2026, growing more than 70%, about twice the market rate [4]. The forecasts are intact.

What the market now asks is who owns the scarce component. [Lam Research](https://theinference.org/markets/companies/lam-research), the wafer-fabrication equipment maker, already said [parts capped its own December guide](https://www.thestreet.com/investing/stocks/lrcx-intc-jim-cramer-warns-lam-research-investors-to-buy-slowly-amid-intel-weak-outlook), with shipments slipping into March [8].

## Marvell is bidding for the scarce part

The optics squeeze is now priced in deal terms, as this site reported on October 26 [6][7]. [Marvell](https://theinference.org/markets/companies/marvell), the AI and data-center chip designer, is [in advanced talks to buy laser maker Lumentum](https://hoodline.com/2026/10/santa-clara-s-marvell-eyes-80-billion-buyout-of-optics-maker-lumentum/), whose optical capacity was sold out through early 2029 (our October 9 story), in a deal Bloomberg Intelligence now [sizes near $100 billion](https://finance.yahoo.com/markets/stocks/articles/lumentum-11-week-marvell-pay-180415084.html), about 31% above [Lumentum](https://theinference.org/markets/companies/lumentum)'s Friday close, paid in Marvell stock [6][7]. The new fact since our coverage is KLA itself naming optics as what paces its shipments.

## The first test of the squeeze comes this week

The counterpoint is that scarcity is the bull case's cost of goods: [Coherent](https://theinference.org/article/coherent-fell-28-on-coreweave-s-debt-scare-not-its-order-book-ai-lasers-sold-out-through-2027), the other big independent laser supplier, is doubling its indium phosphide output (the material its lasers are made from) and reports on November 4, and Lumentum reports November 5 [7]. Those two prints are the first hard read on whether optical supply loosens, and with it whether KLA's December guide and Marvell's premium hold.

## The premium is priced, and insiders sold

Note the price already paid for all this: KLAC trades at about [28.7 times forward earnings](https://www.tradingview.com/news/zacks:99e394e9e094b:0-can-advanced-packaging-demand-drive-klac-s-next-growth-phase/) against 19.4 for its sector, and insiders sold $112.3 million of stock over the past year with no purchases [4][5].

Watch November 4 and 5. If the laser suppliers confirm shortages, KLA's constraint is capacity, and the stocks that own the bottleneck keep the premium. If they do not, the 12-month lead time starts to look like a story with a shelf life.

## Takeaway

KLA beat and guided higher, but named high-end optical components as the pacing item on its shipments and pushed its 63-64% gross margin target to the second half of 2027; Coherent's November 4 and Lumentum's November 5 reports decide whether the constraint, and the valuations priced on it, hold.

## Sources

1. [@wallstengine on X, KLA Q1'27 earnings highlights, 28 October 2026](https://x.com/wallstengine/status/2115536340850819373)
2. [Stocktwits, @DonCorleone77, KLA Q1 results and CEO Rick Wallace statement, 29 October 2026](https://stocktwits.com/DonCorleone77/message/667580170)
3. [Yahoo Finance / Moby Intelligence, KLA Corporation Q1 2027 Earnings Call Summary, 29 October 2026](https://finance.yahoo.com/markets/stocks/articles/kla-corporation-q1-2027-earnings-123000658.html)
4. [Zacks via TradingView, Can Advanced Packaging Demand Drive KLAC's Next Growth Phase?, 31 October 2026](https://www.tradingview.com/news/zacks:99e394e9e094b:0-can-advanced-packaging-demand-drive-klac-s-next-growth-phase/)
5. [GuruFocus, KLA Corp (KLAC) Shares Fall 5.7% -- What GF Score of 93 Tells Investors, 30 October 2026](https://www.gurufocus.com/news/9160065/kla-corp-klac-shares-fall-57-what-gf-score-of-93-tells-investors)
6. [Hoodline, Santa Clara's Marvell Eyes $80 Billion Buyout Of Optics Maker Lumentum, 31 October 2026](https://hoodline.com/2026/10/santa-clara-s-marvell-eyes-80-billion-buyout-of-optics-maker-lumentum/)
7. [Yahoo Finance / TIKR, Lumentum Is Up 11% in a Week. Will Marvell Pay Close to $100 Billion?, 31 October 2026](https://finance.yahoo.com/markets/stocks/articles/lumentum-11-week-marvell-pay-180415084.html)
8. [TheStreet, Jim Cramer issues falling knife warning on Lam Research after Intel's outlook, 31 October 2026](https://www.thestreet.com/investing/stocks/lrcx-intc-jim-cramer-warns-lam-research-investors-to-buy-slowly-amid-intel-weak-outlook)
9. [KLA, quarterly figures from its SEC filings, retrieved 1 November 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000319201)


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KLA says optical parts pace its shipments; Coherent and Lumentum report November 4 and 5 — The Inference. Canonical: https://theinference.org/article/kla-says-optical-parts-pace-its-shipments-coherent-and-lumentum-report-november-4-and-5