LOWN CHRISTIAN M. 4

What Happened
Christian M. Lown, Chief Financial Officer of CoStar Group (CSGP), was awarded 12,268 restricted stock units (RSUs) on March 10, 2026. The units were allocated at an equivalent value of $46.34 per unit (conversion price under the plan), implying a total award value of approximately $568,499. These RSUs were granted pursuant to the company’s Management Stock Purchase Plan and vest in full after four years.

Key Details

• Transaction date: 2026-03-10 (reported on Form 4 filed 2026-03-11)
• Transaction type/code: Award/Grant (A) — 12,268 RSUs awarded
• Price/value: $46.34 per unit (conversion price); total value ≈ $568,499
• Shares owned after transaction: Not specified in the provided filing
• Footnote: Award resulted from converting all or a portion of the reporting person’s annual cash incentive to Deferred Stock Units (each equivalent to one common share) and simultaneously awarding RSUs for an equal number of shares that vest after four years
• Timeliness: Filing covers the March 10 transaction and was filed the next day (not indicated as late)

Context
This was a compensation award (conversion of a cash incentive into deferred equity), not an open-market purchase or sale. Such awards are routine for executives and are intended to align management with long-term shareholder interests via multi-year vesting; they do not by themselves signal immediate buying or selling intent.