Seer, Inc. President/CFO Resigns; VP FP&A Named Treasurer

What Happened
Seer, Inc. announced in an 8‑K that David Horn resigned as President, Chief Financial Officer and Treasurer on September 14, 2026, effective October 1, 2026, to pursue other interests; the company stated the resignation was not due to any disagreement with the company. The company offered to extend the post‑termination exercise period for Horn’s vested options to one year after his last day, subject to the applicable equity plan and his execution (and non‑revocation) of a separation and release agreement. On September 17, 2026, Seer’s board appointed Omid Farokhzad, M.D. (CEO and Chair) as President in addition to his current roles, and named Charles Endweiss (Vice President, Financial Planning & Analysis) as Treasurer and as the company’s principal financial officer and principal accounting officer, all effective October 1, 2026.

Key Details

• David Horn submitted his resignation on Sept 14, 2026, effective Oct 1, 2026; resignation reportedly not due to any disagreement with the company.
• Company offered to extend Horn’s vested option exercise period to one year after his last day, subject to plan terms and a separation and release agreement.
• Board appointments made Sept 17, 2026: Omid Farokhzad to President (in addition to CEO & Chair); Charles Endweiss to Treasurer and principal financial/accounting officer, effective Oct 1, 2026.
• Charles Endweiss (age 49) has been Seer’s VP, Financial Planning & Analysis since Jan 2021; previously Head of Business Operations, Oral Health at Carbon (Aug 2017–Jan 2021); holds a B.A. from University of Illinois, Urbana‑Champaign and an M.B.A. from Santa Clara University. Endweiss entered into Seer’s standard indemnification agreement as previously filed.

Why It Matters
This filing documents a material leadership change in Seer’s finance and corporate leadership. The CEO taking on the President title suggests continuity at the top; promoting the internal VP of FP&A to Treasurer and principal financial officer may reduce disruption since he is already familiar with the company’s finance operations. The option exercise extension for Horn could affect the timing of option exercises, but is contingent on his signing a separation and release and on plan terms. Investors should note the effective date (Oct 1, 2026) and monitor future filings for any additional details on finance leadership, compensation or transition arrangements.