---
schema_version: "secwatch.filing_event.v1"
accession: "0001595974-26-000016"
form_type: "8-K"
ticker: "MGNI"
cik: "0001595974"
company_name: "MAGNITE, INC."
filed_at: "2026-04-20T23:59:59+00:00"
generated_at: "2026-05-15T05:19:49.881194+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Magnite CFO David Day to retire by Sept 30, 2026; transition advisor role through May 2027

## Summary
- David Day to retire as CFO, serve until Sept 30, 2026, then as non-executive advisor through May 31, 2027.
- Board commenced search for new CFO, including external and internal candidates; Day will assist in transition.
- Company reaffirmed Q1 and full year 2026 financial expectations, as previously disclosed on Feb 25, 2026.
- Day has been CFO for ~10 years; oversaw Magnite's growth including merger of Rubicon Project and Telaria and acquisitions of SpotX and SpringServe.

## SEC filing metadata
- accession: 0001595974-26-000016
- form_type: 8-K
- ticker: MGNI
- cik: 0001595974
- company_name: MAGNITE, INC.
- filed_at: 2026-04-20T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1595974/000159597426000016/0001595974-26-000016-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1595974/000159597426000016/mgni-20260420.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001595974-26-000016
- JSON: https://secwatch.observer/filing/0001595974-26-000016.json
- Plain text: https://secwatch.observer/filing/0001595974-26-000016.txt

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