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Gene Boxer

CIK 1758152 · General Counsel and Secretary · last filed 2026-03-17

Gene Boxer is a General Counsel and Secretary who has filed 14 SEC Form 4 insider transactions across 2 companies since 2019. The most recent filing shows the insider had shares withheld for taxes covering $18.7K of CSGP on Mar 17, 2026. Current disclosed insider exposure totals $3.6M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$3.60M

Companies

2

Total Filings

14

Lifetime Open-Market Net

$0

Filer Profile

Reported Address
C/O COSTAR GROUP, INC.
1201 WILSON BLVD.
ARLINGTON, VA 22209
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
CSGP General Counsel and Secretary 95,517 $28.17 $2.69M $0 12 2026-03-17
SG EVP, CSO & Group Gen. Counsel 110,248 $8.24 $909.0K $0 1 2019-03-01

Recent Filings

14 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-03-17 CSGP Tax (F) −428 -$18.7K EDGAR
2026-03-17 CSGP Tax (F) −482 -$21.0K EDGAR
2026-03-11 CSGP Grant (A) +21,920 $0 EDGAR
2026-03-03 CSGP Mixed −4,547 -$202.9K EDGAR
2025-03-18 CSGP Tax (F) −481 -$37.9K EDGAR
2025-03-07 CSGP Grant (A) +12,492 $0 EDGAR
2025-03-03 CSGP Mixed +23,253 -$277.9K EDGAR
2024-03-19 CSGP Tax (F) −372 -$32.7K EDGAR
2024-03-05 CSGP Mixed +7,456 -$107.7K EDGAR
2024-02-26 CSGP Grant (A) +18,189 $0 EDGAR
Showing 1–10 of 14
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.