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AI brief of an SEC Form 8-K · CoStar (CSGP)

CoStar Group names Robin Rossmann CFO effective July 31, succeeding Christian Lown

Neutral Impact 4 of 5 leadership Written later

CoStar Group appointed Robin Rossmann, its Managing Director, Europe, as Chief Financial Officer effective July 31, 2026. He succeeds Christian Lown, who resigned to pursue an opportunity outside the company's industry, and the company says the resignation was not due to any disagreement on operations, policies or practices. The filing also details Rossmann's pay package, including a $2.5 million equity grant and a $500,000 relocation subsidy.

Key points

  • Robin Rossmann appointed CFO effective July 31, 2026, reporting to Founder and CEO Andy Florance
  • Christian Lown resigned as CFO effective July 31, 2026; he notified the company on July 7, 2026
  • Rossmann's base salary is £440,000, rising to $590,000 after relocation to Arlington, VA, with a target bonus of 100% of base salary
  • One-time equity grant valued at $2.5 million as of July 31, 2026, plus a $500,000 relocation subsidy

The filing

CompanyCoStar (CSGP)
Form8-K, current report
Filed with the SECJul 13, 2026, 5:06 PM ET
Accession number0001057352-26-000054

Items reported: 5.02 Director / Officer Change7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 8, 2026, 1:12 AM ET, from the text of the filing and its press-release exhibits only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on July 13, 2026.

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.