---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-23-034134"
form_type: "8-K"
ticker: "CATX"
cik: "0000728387"
company_name: "Perspective Therapeutics, Inc."
filed_at: "2023-12-12T23:59:59+00:00"
generated_at: "2026-06-07T14:28:39.079249+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Perspective Therapeutics sells brachytherapy business to GT Medical

## Summary
- Transaction expected to close Q1 2024; assets include Cesium-131 seed IP, equipment, Richland, WA lease.
- Consideration: 0.5% equity in GT Medical plus tiered cash royalties over 4 years (3-5% on seed sales, 0.5% on GammaTile).
- Company retains most liabilities (environmental, warranty, taxes, accounts payable) and all accounts receivable.
- Sale aligns resources with lead-based alpha-particle therapy pipeline (melanoma VMT01, neuroendocrine VMT-α-NET).
- GT Medical gains control of Cesium-131 seed production, expanding its GammaTile Therapy customer base.

## SEC filing metadata
- accession: 0001437749-23-034134
- form_type: 8-K
- ticker: CATX
- cik: 0000728387
- company_name: Perspective Therapeutics, Inc.
- filed_at: 2023-12-12T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/728387/000143774923034134/0001437749-23-034134-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/728387/000143774923034134/isr20231208_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-034134
- JSON: https://secwatch.observer/filing/0001437749-23-034134.json
- Plain text: https://secwatch.observer/filing/0001437749-23-034134.txt

## Key facts
- Material Agreements
  Perspective Therapeutics, Inc. entered into Asset Purchase Agreement with GT Medical Technologies, Inc. (effective 2023-12-07).
  - Action: entry
  - Agreement: asset purchase
  - Counterparty: GT Medical Technologies, Inc.
  - Effective: 2023-12-07
  source text: On December 7, 2023, Isoray Medical, Inc. (“ Medical ”), a Delaware corporation and wholly-owned subsidiary of Perspective Therapeutics, Inc., a Delaware corporation (the “ Company ”), entered into an Asset Purchase Agreement (the “ Asset Purchase Agreement ”) by and among Medical, the Company, and GT Medical Technologies, Inc., a Delaware corporation (“ GT Medical ”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/728387/000143774923034134/0001437749-23-034134-index.htm

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