---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-043353"
form_type: "8-K"
ticker: "PTGX"
cik: "0001377121"
company_name: "Protagonist Therapeutics, Inc"
filed_at: "2023-04-10T23:59:59+00:00"
generated_at: "2026-06-17T04:03:09.740329+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Protagonist Therapeutics announces $100M public offering of 5M shares at $20/share

## Summary
- 5,000,000 shares offered at $20.00 each; underwriters have 30-day option for 750,000 additional shares.
- Gross proceeds expected ~$100M before underwriting discounts and expenses, closing April 10, 2023.
- Underwriting syndicate led by J.P. Morgan, Jefferies, and Piper Sandler & Co.
- Shares offered under effective shelf registration statement No. 333-266595.

## SEC filing metadata
- accession: 0001104659-23-043353
- form_type: 8-K
- ticker: PTGX
- cik: 0001377121
- company_name: Protagonist Therapeutics, Inc
- filed_at: 2023-04-10T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1377121/000110465923043353/0001104659-23-043353-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1377121/000110465923043353/tm2311339d4_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-043353
- JSON: https://secwatch.observer/filing/0001104659-23-043353.json
- Plain text: https://secwatch.observer/filing/0001104659-23-043353.txt

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