---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-302644"
form_type: "8-K"
ticker: "PSNL"
cik: "0001527753"
company_name: "Personalis, Inc."
filed_at: "2025-11-28T23:59:59+00:00"
generated_at: "2026-05-16T16:06:26.738299+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Personalis files prospectus supplement for up to $100M at-the-market stock offering

## Summary
- Up to $100 million of common stock may be sold under amended ATM sales agreement with Piper Sandler and BTIG.
- Offering is in addition to the existing ATM facility from December 2024.
- Cooley LLP legal opinion on the shares is filed as Exhibit 5.1.
- Proceeds intended for general corporate purposes, no specific use disclosed.

## SEC filing metadata
- accession: 0001193125-25-302644
- form_type: 8-K
- ticker: PSNL
- cik: 0001527753
- company_name: Personalis, Inc.
- filed_at: 2025-11-28T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1527753/000119312525302644/0001193125-25-302644-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1527753/000119312525302644/d94177d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-302644
- JSON: https://secwatch.observer/filing/0001193125-25-302644.json
- Plain text: https://secwatch.observer/filing/0001193125-25-302644.txt

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