---
schema_version: "secwatch.filing_event.v1"
accession: "0001477932-25-007086"
form_type: "8-K"
ticker: "LTBR"
cik: "0001084554"
company_name: "LIGHTBRIDGE Corp"
filed_at: "2025-09-26T23:59:59+00:00"
generated_at: "2026-05-17T05:31:25.489596+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Lightbridge files prospectus supplement for $75M at-the-market equity offering

## Summary
- Filed prospectus supplement on Sept 26, 2025 to sell up to $75M of common stock via ATM program with Jefferies.
- Sales Agreement with Jefferies originally entered June 5, 2025; shelf registration declared effective June 4, 2025.
- Offering will be made at market prices, resulting in dilution to existing shareholders.

## SEC filing metadata
- accession: 0001477932-25-007086
- form_type: 8-K
- ticker: LTBR
- cik: 0001084554
- company_name: LIGHTBRIDGE Corp
- filed_at: 2025-09-26T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1084554/000147793225007086/0001477932-25-007086-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1084554/000147793225007086/ltbr_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001477932-25-007086
- JSON: https://secwatch.observer/filing/0001477932-25-007086.json
- Plain text: https://secwatch.observer/filing/0001477932-25-007086.txt

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