---
schema_version: "secwatch.filing_event.v1"
accession: "0001595974-25-000015"
form_type: "8-K"
ticker: "MGNI"
cik: "0001595974"
company_name: "MAGNITE, INC."
filed_at: "2025-05-07T23:59:59+00:00"
generated_at: "2026-05-22T08:09:06.837075+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Magnite Q1: rev +4%, Contr ex-TAC +12%, Adj EBITDA +47%; cautious Q2 guide, withdraws FY outlook

## Summary
- Revenue $155.8M (+4% YoY); Contribution ex-TAC $145.8M (+12% YoY); CTV Contribution ex-TAC $63.2M (+15%, above guidance).
- Adjusted EBITDA $36.8M (+47% YoY, margin 25%); Non-GAAP EPS $0.12 vs $0.05; Net loss narrowed to $9.6M from $17.8M.
- Q2 2025 guidance: Total Contribution ex-TAC $154-160M, CTV $70-72M, DV+ $84-88M; Adj EBITDA OpEx $110-112M.
- Company withdraws full-year 2025 outlook due to tariff-driven economic uncertainty, despite strong Q1 performance.
- CEO highlights continued Netflix programmatic growth and potential benefit from Google antitrust ruling.

## SEC filing metadata
- accession: 0001595974-25-000015
- form_type: 8-K
- ticker: MGNI
- cik: 0001595974
- company_name: MAGNITE, INC.
- filed_at: 2025-05-07T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1595974/000159597425000015/0001595974-25-000015-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1595974/000159597425000015/mgni-20250507.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001595974-25-000015
- JSON: https://secwatch.observer/filing/0001595974-25-000015.json
- Plain text: https://secwatch.observer/filing/0001595974-25-000015.txt

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