Illumina Inc ILMN

The bottom line

The stock is driven by sequencing consumables revenue and NovaSeq X instrument placements, which also set the margin path. The quarter beat ($1.44 vs $1.36) and guidance was raised, yet the shares fell 16.4% in the week while the S&P 500 fell 1.73% and the sector ETF rose 2.97%. At about 39 times earnings, close to the sector median of 37.6, the valuation embeds continued growth and margin gains, while actual growth is 4.2% year-on-year and revenue fell 2.6% from the prior quarter. The central tension: strong clinical demand and $378 million of quarterly free cash flow against weak research markets, $2.31 billion of debt versus $1.34 billion of cash, and high volatility (beta 1.45).

An explanation of the mechanics from the facts on this page, not advice.

What the company does

Illumina Inc is a large-cap company in the Healthcare sector (Diagnostics & Research), with a market value of $34.3B, based in the USA.

It employs about 8,600 people and has been listed since Jul 28, 2000.

Illumina, Inc. provides sequencing- and array-based solutions for genetic and genomic analysis in the Americas, Europe, Greater China, the Asia Pacific, the Middle East, and Africa. The company offers sequencing- and array-based instruments and consumables, which include reagents, flow cells, and library preparation; whole-genome sequencing kits, which sequence entire genomes of various size and complexity; and targeted resequencing kits, which sequence exomes, specific genes, and RNA or other genomic regions of interest.

Cheap or expensive? priced in line with its group

Its price-to-earnings (P/E) is 39.0 versus 37.6 for the median of the Healthcare sector in our universe (25 companies) — priced in line with its group.

Revenue is growing 4% versus the same quarter last year.

On analysts' next-year forecasts the multiple drops to 38.5 — they expect higher earnings.

The average analyst price target is 261.60, 16% above the current price (their view, not ours).

The stock sits at 58% of its one-year range (0% = the low, 100% = the high).

The risks

• • The stock is more volatile than average (beta 1.5) — big daily moves both ways.

Strengths

• ✅ Profitable — 20 of every 100 dollars of revenue stays as profit.
• ✅ Generates free cash flow — profit becomes cash in the bank.

What the market is talking about this week

A beat and a raised outlook, yet the stock fell sharply during the week.

• Illumina reported third-quarter revenue of $1.13 billion, up 4.2%, with adjusted earnings per share of $1.44 versus the $1.36 analysts expected. [1] [3] [4]
• Management raised its FY26 outlook to revenue of $4.64-$4.66 billion and adjusted EPS of $5.40-$5.45, up from $5.30-$5.40 previously. [1] [3]
• Despite the beat, the market reaction to the quarter was negative; the company acknowledged continued weakness in research and applied markets. [3]
• Analysts asked whether high NovaSeq X instrument placements were pulled-forward orders; CEO Jacob Thaysen said the pace reflects normal business. [3]
• Greater China revenue was $59 million, 5.2% of sales, well above the $34.55 million expected; Europe, Middle East, Africa and Latin America contributed $347 million. [4]

A summary of the articles below only, each point with its source. Not a forecast, not a recommendation.

What to watch

• Whether current-quarter revenue approaches the $1.22 billion analysts expect, after a 2.6% sequential decline. [4]
• Delivery against the raised FY26 guidance of $4.64-$4.66 billion revenue and $5.40-$5.45 adjusted EPS. [1] [3]
• The pace of NovaSeq X placements and clinical consumables growth, which the CEO described as mid-teens percent. [3]
• Whether adjusted operating margin holds near 26% after rising from 20.9% a year ago, since it underpins earnings. [3]

What changed this week

Over the past week the stock fell 16.4% (for comparison: S&P 500 -1.7%, sector ETF XLV +3.0%).

The company published its quarterly report this week — see the plain-language summary above.

This week's news

• 3 Stocks to Watch Following Guidance Upgrades finance.yahoo.com · 2026-11-02
  A roundup of three healthcare firms raising guidance; Illumina reported $1.13 billion revenue, $1.44 adjusted EPS, and lifted its full-year revenue and EPS outlook. source ↗
• Forensic Technologies and Services - Global Strategic Business Report: Secure Share of a $44.7B Market by 2030 as Thermo Fisher, Illumina, Agilent and BAE Systems Accelerate AI-Led Forensics finance.yahoo.com · 2026-11-02
  A commercial market report estimates forensic technologies growing from $24 billion to $44.7 billion by 2030; Illumina is named among the players in the field. source ↗
• The top 5 analyst questions from Illumina’s Q3 earnings call finance.yahoo.com · 2026-11-02
  A recap of the earnings call: the market reacted negatively, adjusted operating margin was 26.2% versus 20.9% a year ago, and analysts pressed on NovaSeq X demand durability. source ↗
• Don't Overlook Illumina (ILMN) International Revenue Trends While Assessing the Stock finance.yahoo.com · 2026-11-02
  A breakdown of Illumina's international revenue for the quarter: Greater China $59 million, EMEA and Latin America $347 million; analysts expect $1.22 billion for the current quarter. source ↗
• US Stock Market Today: S&P 500 Futures Edge Higher On ISM Manufacturing Test finance.yahoo.com · 2026-11-02
  A daily market-open roundup focused on US manufacturing data and other stocks; it contains no new information about Illumina. source ↗
• Invesco S&P 500 Equal Weight (RSP) Buys $0.2 Million More Morgan Stanley on Thursday finance.yahoo.com · 2026-11-02
  The Invesco RSP equal-weight ETF trimmed its Illumina holding by 1,680 shares, about $0.5 million, as part of a technical trim across 498 positions. source ↗

What changed since last week

This is the first summary for this stock; from next week this section shows what changed.