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Last update: Oct 30, 2026, 6:17 PM ET
Illumina, Inc.
▼ 18.6% on Oct 30, 2026

Why Illumina, Inc. (ILMN) Stock Fell 18.6% on Oct 30, 2026

Researched by BestStocks Market Desk · Published Oct 30, 2026
Prior close
$290.06
Oct 30, 2026 close
$235.99
Change
−$54.07
-18.64%
Rel. volume
1.9×
5.4M shares

What happened

Risk-18.6%high confidence

Illumina filed an 8-K material event report today alongside its earnings announcement. The stock fell 12.27% to $254.46, down from $290.06 at the previous close. The SEC filing and concurrent earnings report indicate a significant corporate development, though the specific details of the material event are not yet available in the delayed data.

Source: fmp_intraday
What to watch next

Review the full 8-K filing (ilmn-20261029.htm) and earnings report once available to identify the specific material event and assess forward guidance or operational impacts.

Other developments that session

Filingshigh confidence

Illumina, Inc. (ILMN) filed a new 10-Q on 2026-10-30, disclosing financial results for the most recent quarter.

Source: filing_snapshots
News

Illumina raised 2026 guidance driven by strong clinical sequencing demand and NovaSeq X adoption.

Source: Zacks

Frequently asked questions

Why did Illumina, Inc. (ILMN) stock fall on Oct 30, 2026?

Illumina filed an 8-K material event report today alongside its earnings announcement. The stock fell 12.27% to $254.46, down from $290.06 at the previous close. The SEC filing and concurrent earnings report indicate a significant corporate development, though the specific details of the material event are not yet available in the delayed data.

How much did ILMN stock fall on Oct 30, 2026?

ILMN fell 18.6% during the Oct 30, 2026 trading session.

This is an archived analysis of ILMN's Oct 30, 2026 session.
See ILMN's latest changes →
Educational research tool — not personalized investment advice. Figures reflect the Oct 30, 2026 session as first analyzed.