---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-26-030517"
form_type: "8-K"
ticker: "APT"
cik: "0000884269"
company_name: "ALPHA PRO TECH LTD"
filed_at: "2026-09-16T16:07:53+00:00"
generated_at: "2026-09-16T16:09:09.871703+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Alpha Pro Tech replaces auditor: Tanner LLP out, MNP LLP in

## Summary
- Tanner LLP dismissed as independent auditor effective Sept 14, 2026; MNP LLP engaged for FY 2026.
- No disagreements or reportable events with Tanner during 2024, 2025, and interim period to Sept 14, 2026.
- Tanner's reports for FY 2024 and FY 2025 were unqualified, with no adverse or modified opinions.
- Tanner letter to SEC dated Sept 16, 2026 agrees with company disclosures.

## SEC filing metadata
- accession: 0001437749-26-030517
- form_type: 8-K
- ticker: APT
- cik: 0000884269
- company_name: ALPHA PRO TECH LTD
- filed_at: 2026-09-16T16:07:53+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/884269/000143774926030517/0001437749-26-030517-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/884269/000143774926030517/apt20260915_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-26-030517
- JSON: https://secwatch.observer/filing/0001437749-26-030517.json
- Plain text: https://secwatch.observer/filing/0001437749-26-030517.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.