Home / Auditor changes / Quanex Building Products CORP

3/5Quanex Building Products CORP (NX): Auditor change

Filed 2026-01-16 路 Form 8-K 路 Accession 0001104659-26-004552 small

Market data

Price before filing: $18.33 (2026-01-15 close, split/dividend-adjusted)
Market cap at flag: $850.5M (2026-01-16) 路 Latest: $858.8M (2026-10-16)

What happened next

WindowNXSPYvs SPY
30 days+19.1%-1.4%+20.5%2026-02-17
90 days+2.7%+1.6%+1.0%2026-04-16
180 days-4.1%+9.6%-13.8%2026-07-15

Return from the last close before the filing date to the first close on/after the window end. Pending windows have not fully elapsed. Past performance says nothing certain about the future.

Insider trading around this filing

90 days before the flag: 1 insider sold $3.2M (2 sales)
30 days after: none reported.

DateInsiderTypeSharesPriceValue10b5-1 planSource
2025-12-16Teleios Capital Partners GmbH (+2 joint filers)
10% owner
Sale80,515$16.51$1.3MnoForm 4
2025-12-17Teleios Capital Partners GmbH (+2 joint filers)
10% owner
Sale119,485$15.94$1.9MnoForm 4
2026-01-16: red flag filed

Open-market purchases and sales (Form 4 codes P and S) by officers, directors and 10% owners, by transaction date, from 2025-10-18 to 2026-02-15. Excludes option exercises, grants, gifts and tax withholding. Amended filings replace the originals; joint filings count once. Foreign private issuers do not file Form 4. Many insider sales are pre-scheduled (10b5-1 plans) and are not by themselves a sign of wrongdoing.

Verified excerpt

"Following that process, on January 13, 2026, KPMG LLP ("KPMG") was appointed to serve as the Company's independent public accounting firm for the fiscal year ending October 31, 2026."

Quoted from the filing. Source

What this means

The company changed its outside auditor (8-K Item 4.01). A dismissal or resignation, especially near an annual report or with reported disagreements, is a warning sign. Changes caused by audit firms merging are usually routine.

Type: dismissed
Disagreements reported: no
Former auditor: Grant Thornton LLP · New auditor: KPMG LLP

Read the original filing on SEC.gov →

Not investment advice. Automated summary; verify against the filing.

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