---
schema_version: "secwatch.filing_event.v1"
accession: "0000929638-26-002281"
form_type: "8-K"
ticker: "GCTS"
cik: "0001851961"
company_name: "GCT Semiconductor Holding, Inc."
filed_at: "2026-06-18T20:31:43+00:00"
generated_at: "2026-06-18T20:40:28.336903+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# GCT Semiconductor files legal opinion for at-the-market stock issuance

## Summary
- Legal opinion filed re: shares issuable under April 1, 2025 Sales Agreement with sales agents.
- Prospectus supplement filed June 18, 2026 supplements S-3 registration (No. 333-286316) effective April 9, 2025.
- Opinion covers legality of common stock offered via at-the-market program; no new financial data provided.

## SEC filing metadata
- accession: 0000929638-26-002281
- form_type: 8-K
- ticker: GCTS
- cik: 0001851961
- company_name: GCT Semiconductor Holding, Inc.
- filed_at: 2026-06-18T20:31:43+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1851961/000092963826002281/0000929638-26-002281-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1851961/000092963826002281/form8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000929638-26-002281
- JSON: https://secwatch.observer/filing/0000929638-26-002281.json
- Plain text: https://secwatch.observer/filing/0000929638-26-002281.txt

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