---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-395523"
form_type: "8-K"
ticker: "SEER"
cik: "0001726445"
company_name: "Seer, Inc."
filed_at: "2026-09-18T20:06:57+00:00"
generated_at: "2026-09-18T20:08:36.591224+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Seer CFO/President David Horn resigns; CEO Farokhzad adds President, Endweiss named PFO/Treasurer

## Summary
- David Horn resigns as President, CFO and Treasurer effective Oct 1, 2026, to pursue other interests; no disagreement with company.
- CEO Omid Farokhzad, M.D. appointed President in addition to CEO/Chair effective Oct 1, 2026.
- Charles Endweiss, VP FP&A, appointed Treasurer and principal financial/accounting officer effective Oct 1, 2026.
- Horn's vested option exercise period extended to one year after resignation, contingent on signed release agreement.
- Endweiss has been VP FP&A since Jan 2021, prior at Carbon; no family ties or disclosable transactions.

## SEC filing metadata
- accession: 0001193125-26-395523
- form_type: 8-K
- ticker: SEER
- cik: 0001726445
- company_name: Seer, Inc.
- filed_at: 2026-09-18T20:06:57+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1726445/000119312526395523/0001193125-26-395523-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1726445/000119312526395523/d110986d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-395523
- JSON: https://secwatch.observer/filing/0001193125-26-395523.json
- Plain text: https://secwatch.observer/filing/0001193125-26-395523.txt

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