---
schema_version: "secwatch.filing_event.v1"
accession: "0001595974-21-000063"
form_type: "8-K"
ticker: "MGNI"
cik: "0001595974"
company_name: "MAGNITE, INC."
filed_at: "2021-11-03T23:59:59+00:00"
generated_at: "2026-06-28T14:02:04.406081+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.82
calibrated_materiality_score: 0.82
confidence: "high"
source: SEC EDGAR
---

# Magnite Q3 revenue up 116% YoY to $131.9M; CTV revenue ex-TAC grows 51% pro forma

## Summary
- Revenue ex-TAC $114.1M, up 89% YoY (up 26% pro forma); CTV portion $43.1M, up 51% pro forma, 38% of total.
- Net loss $24.3M ($0.18 loss per share) vs $10.5M loss last year; adjusted EBITDA $40.0M (35% margin) vs $13.7M.
- Non-GAAP EPS $0.14 vs $0.06 YoY; operating free cash flow $34.0M in Q3.
- Q4 guidance: revenue ex-TAC $138-142M, CTV portion $52-56M; adj. EBITDA expenses $79-81M, capex ~$8M.
- SpringServe ad server acquisition closed July 1, 2021, enhancing CTV position.

## SEC filing metadata
- accession: 0001595974-21-000063
- form_type: 8-K
- ticker: MGNI
- cik: 0001595974
- company_name: MAGNITE, INC.
- filed_at: 2021-11-03T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.82
- calibrated_materiality_score: 0.82
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1595974/000159597421000063/0001595974-21-000063-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1595974/000159597421000063/mgni-20211103.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001595974-21-000063
- JSON: https://secwatch.observer/filing/0001595974-21-000063.json
- Plain text: https://secwatch.observer/filing/0001595974-21-000063.txt

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