Boxer Gene 4/A

What Happened
Gene Boxer, General Counsel and Secretary of CoStar Group (CSGP), disposed of 482 shares on March 15, 2026 to satisfy a tax liability related to equity compensation. The per-share amount reported is $43.63, for a total of approximately $21,030. The Form 4 uses transaction code F, indicating shares were withheld/surrendered for taxes rather than an open-market sale. This is an amended filing correcting an administrative error.

Key Details

• Transaction date: 2026-03-15; reported on an amended Form 4 filed 2026-03-17.
• Price used: $43.63 per share; total value ≈ $21,030. Footnote notes $43.63 was the closing price on the last preceding business day (Mar 13, 2026).
• Shares disposed: 482 (tax withholding / surrender).
• Shares owned after transaction: Not reported on this Form 4.
• Footnotes: F1—correction due to administrative error; F2—price equals Mar 13, 2026 closing price.
• Filing timeliness: This Form 4 is amended; original filing details not shown here.

Context
Code F transactions are routine tax-withholding events when an insider surrenders shares to cover withholding obligations from vesting or option exercises. These are not the same as an open-market sale and generally are not interpreted as a directional bet on the stock. The amendment indicates the filer corrected earlier administrative information rather than announcing a new or different transaction.