---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-248326"
form_type: "8-K"
ticker: "ANAB"
cik: "0001370053"
company_name: "ANAPTYSBIO, INC"
filed_at: "2026-05-29T20:15:16+00:00"
generated_at: "2026-05-29T20:16:11.928247+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# AnaptysBio files Form 8937 with IRS regarding tax treatment of First Tracks spin-off dividend

## Summary
- Filed Form 8937 with IRS concerning dividend from separation and spin-off of First Tracks Biotherapeutics.
- Form 8937 provides guidance on how the dividend is treated by stockholders and change in tax basis.
- Form 8937 information will be posted on AnaptysBio's website under the Investors section.
- Company urges stockholders to consult their own tax advisor regarding tax consequences of the distribution.
- This update is for informational purposes only and not to be considered legal or tax advice.

## SEC filing metadata
- accession: 0001193125-26-248326
- form_type: 8-K
- ticker: ANAB
- cik: 0001370053
- company_name: ANAPTYSBIO, INC
- filed_at: 2026-05-29T20:15:16+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1370053/000119312526248326/0001193125-26-248326-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1370053/000119312526248326/anab-20260529.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-248326
- JSON: https://secwatch.observer/filing/0001193125-26-248326.json
- Plain text: https://secwatch.observer/filing/0001193125-26-248326.txt

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