---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-060317"
form_type: "8-K"
ticker: "APVO"
cik: "0001671584"
company_name: "Aptevo Therapeutics Inc."
filed_at: "2025-04-29T23:59:59+00:00"
generated_at: "2026-05-23T03:53:46.142354+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Aptevo files prospectus supplement to sell up to $3.17M in common stock via ATM

## Summary
- ATM offering of up to $3,167,548 in common stock under sales agreement with Roth Capital Partners.
- As of April 29, 2025, 305,845 shares sold at $0.5946/share for $181,848 gross proceeds.
- Supplement amends prior April 28, 2025 prospectus supplement; legal opinion filed as Exhibit 5.1.
- Shares offered under existing S-3 registration statement (File No. 333-284969).
- Paul Hastings LLP provided the legal opinion included in the filing.

## SEC filing metadata
- accession: 0000950170-25-060317
- form_type: 8-K
- ticker: APVO
- cik: 0001671584
- company_name: Aptevo Therapeutics Inc.
- filed_at: 2025-04-29T23:59:59+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/1671584/000095017025060317/0000950170-25-060317-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1671584/000095017025060317/apvo-20250429.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-060317
- JSON: https://secwatch.observer/filing/0000950170-25-060317.json
- Plain text: https://secwatch.observer/filing/0000950170-25-060317.txt

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