---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-295957"
form_type: "8-K"
ticker: "RLYB"
cik: "0001739410"
company_name: "Rallybio Corp"
filed_at: "2022-12-01T23:59:59+00:00"
generated_at: "2026-06-21T11:01:26.448490+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Underwriters partially exercise overallotment option, purchasing 803,654 shares at $6.00

## Summary
- Underwriters purchased 803,654 additional shares at $6.00 per share, less discounts and commissions.
- Exercise is partial exercise of underwriters' 30-day option from November 10, 2022 underwriting agreement.
- Closing expected on or about December 1, 2022, subject to customary conditions.
- Previously announced offering included 5,000,001 shares and pre-funded warrants for up to 3,333,388 shares.
- Offering made under effective shelf registration statement (File No. 333-266668).

## SEC filing metadata
- accession: 0001193125-22-295957
- form_type: 8-K
- ticker: RLYB
- cik: 0001739410
- company_name: Rallybio Corp
- filed_at: 2022-12-01T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1739410/000119312522295957/0001193125-22-295957-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1739410/000119312522295957/d428641d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-295957
- JSON: https://secwatch.observer/filing/0001193125-22-295957.json
- Plain text: https://secwatch.observer/filing/0001193125-22-295957.txt

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