---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-042575"
form_type: "8-K"
ticker: "CATX"
cik: "0000728387"
company_name: "Perspective Therapeutics, Inc."
filed_at: "2024-04-08T23:59:59+00:00"
generated_at: "2026-06-04T01:36:44.971987+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Perspective Therapeutics dismisses auditor Assure CPA, engages Withum

## Summary
- Audit Committee dismissed Assure CPA, LLC as independent auditor effective April 5, 2024.
- Engaged WithumSmith+Brown, PC as new independent auditor for FY 2024, effective same date.
- No disagreements with Assure on accounting principles or reportable events during prior periods.
- Assure's audit reports for FY 2023, FY 2022, and transition period were unqualified.
- Assure provided a letter dated April 8, 2024 concurring with statements, filed as Exhibit 16.1.

## SEC filing metadata
- accession: 0000950170-24-042575
- form_type: 8-K
- ticker: CATX
- cik: 0000728387
- company_name: Perspective Therapeutics, Inc.
- filed_at: 2024-04-08T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/728387/000095017024042575/0000950170-24-042575-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/728387/000095017024042575/catx-20240405.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-042575
- JSON: https://secwatch.observer/filing/0000950170-24-042575.json
- Plain text: https://secwatch.observer/filing/0000950170-24-042575.txt

## Key facts
- Auditor Changes
  Perspective Therapeutics, Inc. engaged WithumSmith+Brown, PC as its auditor.
  - Action: engagement
  - Auditor: WithumSmith+Brown, PC
  source text: Also, on April 5, 2024, the Audit Committee approved the engagement of WithumSmith+Brown, PC ("Withum") as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2024, effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/728387/000095017024042575/0000950170-24-042575-index.htm
- Auditor Changes
  Perspective Therapeutics, Inc. dismissed Assure CPA, LLC as its auditor.
  - Action: dismissal
  - Auditor: Assure CPA, LLC
  - Successor: WithumSmith+Brown, PC
  source text: on April 5, 2024, the Audit Committee approved the dismissal of Assure CPA, LLC ("Assure") as the Company’s independent registered public accounting firm, effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/728387/000095017024042575/0000950170-24-042575-index.htm

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