---
schema_version: "secwatch.filing_event.v1"
accession: "0001666134-25-000029"
form_type: "8-K"
ticker: "BL"
cik: "0001666134"
company_name: "BLACKLINE, INC."
filed_at: "2025-08-05T23:59:59+00:00"
generated_at: "2026-05-17T20:47:10.911598+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# BlackLine announces Therese Tucker to step down as Co-CEO, Owen Ryan becomes sole CEO

## Summary
- Therese Tucker transitions from Co-CEO to Founder role effective Oct 1, 2025; remains on board and executive team.
- Owen Ryan becomes sole CEO and Chairman; base salary raised to $600,000.
- David Henshall named Lead Independent Director effective Aug 1, 2025; Tom Unterman remains on board.
- Tucker's base salary decreases to $460,000; equity awards unchanged; Jeremy Ung leads Product & Tech.

## SEC filing metadata
- accession: 0001666134-25-000029
- form_type: 8-K
- ticker: BL
- cik: 0001666134
- company_name: BLACKLINE, INC.
- filed_at: 2025-08-05T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1666134/000166613425000029/0001666134-25-000029-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1666134/000166613425000029/bl-20250730.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001666134-25-000029
- JSON: https://secwatch.observer/filing/0001666134-25-000029.json
- Plain text: https://secwatch.observer/filing/0001666134-25-000029.txt

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