SIMURO FRANK 4

What Happened
Frank Simuro, Chief Technology Officer of CoStar Group (CSGP), disposed of 4,151 shares on Feb 15, 2026 to satisfy a tax liability (transaction code F). The filing reports a per-share price of $44.99, corresponding to roughly $186,753 in value. This was a tax-withholding disposition (shares used to cover taxes), not an open-market buy.

Key Details

• Transaction date: 2026-02-15; Filing date: 2026-02-18. Form 4 was filed shortly after the transaction.
• Price: $44.99 per share (footnote F1 notes Nasdaq closing price on Feb 13, 2026 was $44.99).
• Shares disposed: 4,151; approximate value: $186,753.
• Transaction type: F — Payment of exercise price or tax liability (shares surrendered/withheld to cover taxes).
• Shares owned after transaction: Not disclosed in the filing.
• Exhibit: Exhibit 24 (Power of Attorney) attached to the Form 4.

Context
Tax-withholding dispositions are routine following option exercises or RSU vesting and generally reflect tax obligations rather than a directional bet on the stock. The filing does not state whether shares were withheld by the company or sold in the market; either method is common. Purchases by insiders tend to carry more signal value than routine withholding sales.