---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-23-033769"
form_type: "8-K"
ticker: "CATX"
cik: "0000728387"
company_name: "Perspective Therapeutics, Inc."
filed_at: "2023-12-06T23:59:59+00:00"
generated_at: "2026-06-07T17:34:30.586092+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Perspective Therapeutics unit enters Cesium-131 supply deal with Russian state firm through March 2025

## Summary
- Isoray Medical signed contract with JSC Isotope for Cesium-131; supersedes November 2022 agreement.
- Contract effective January 1, 2024 through March 31, 2025; price and volume redacted as confidential.
- Buyer agrees Russian sanctions do not excuse performance; dispute resolution under Hong Kong law/HKIAC.
- Payment due 30 calendar days after delivery in USD via intermediary bank; shipping FCA Russia.
- Goods restricted to medical source production; no military use; seller may inspect end-use compliance.

## SEC filing metadata
- accession: 0001437749-23-033769
- form_type: 8-K
- ticker: CATX
- cik: 0000728387
- company_name: Perspective Therapeutics, Inc.
- filed_at: 2023-12-06T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/728387/000143774923033769/0001437749-23-033769-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/728387/000143774923033769/isr20231205_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-033769
- JSON: https://secwatch.observer/filing/0001437749-23-033769.json
- Plain text: https://secwatch.observer/filing/0001437749-23-033769.txt

## Key facts
- Material Agreements
  Perspective Therapeutics, Inc. entered into 2024 Agreement with Joint Stock Company «Isotope» (effective 2023-12-05).
  - Action: entry
  - Agreement: supply
  - Counterparty: Joint Stock Company «Isotope»
  - Effective: 2023-12-05
  source text: On December 5, 2023, Isoray Medical, Inc. (“Medical”), a wholly-owned subsidiary of Perspective Therapeutics, Inc. (the “Company”), entered into a supply contract (the “2024 Agreement”) with Joint Stock Company «Isotope», a Russian company (“JSC Isotope”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/728387/000143774923033769/0001437749-23-033769-index.htm

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