INVESTABOT
Equity Research
XNAS · SERVICES-BUSINESS SERVICES, NEC
Includes notes from domestic 8-K and foreign private issuer 6-K disclosures.
CoStar (CSGP) had 1 Form 144 pre-sale notice filed on 2026-08-05. Form 144 filings signal an insider's intent to sell securities under SEC Rule 144 — they do not confirm a completed transaction.
TL;DR: CoStar Group stockholders reelected all eight director nominees and approved the company's executive compensation program at the Annual Meeting held June 23, 2026.
open-market Form 4 only - grants, exercises, tax withholding excluded
1 buyers - 2 unique sellers · 6 accumulating - 6 trimming - 1 unchanged
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| August 7, 2026 | Cann Cynthia Cammett | Chief Accounting Officer | SELL | -4,788 | $31 | ~$0.1M |
| August 5, 2026 | Hill John W | — | SELL | -3,500 | $30 | ~$0.1M |
| August 4, 2026 | Florance Andrew C | Founder and CEO | BUY | 83,300 | $30 | ~$2.5M |
| August 1, 2026 | Cann Cynthia Cammett | Chief Accounting Officer | TAX_WITHHOLD | -1,077 | $29 | ~$31K |
| August 1, 2026 | Saint Frederick G. | President, Marketplaces | TAX_WITHHOLD | -1,436 | $29 | ~$41K |
| July 31, 2026 | Rossmann Robin Jack | Chief Financial Officer | GRANT | 34,771 | — | — |
| July 31, 2026 | Cann Cynthia Cammett | Chief Accounting Officer | GRANT | 26,078 | — | — |
| July 1, 2026 | Lown Christian M. | Chief Financial Officer | TAX_WITHHOLD | -5,597 | $29 | ~$0.2M |
| June 23, 2026 | Glaser Rachel C | — | GRANT | 8,262 | — | — |
| June 23, 2026 | Berisford John L | — | GRANT | 8,262 | — | — |
| June 23, 2026 | Hill John W | — | GRANT | 8,262 | — | — |
| June 23, 2026 | Brunner Angelique G. | — | GRANT | 8,262 | — | — |
| June 23, 2026 | Musslewhite Robert W | — | GRANT | 8,262 | — | — |
| June 23, 2026 | Sams Louise S | — | GRANT | 8,262 | — | — |
| June 23, 2026 | McCarthy Christine M | — | GRANT | 8,262 | — | — |
| June 15, 2026 | Cann Cynthia Cammett | Chief Accounting Officer | TAX_WITHHOLD | -461 | $32 | ~$15K |
| May 1, 2026 | Florance Andrew C | President and CEO | BUY | 68,330 | $35 | ~$2.4M |
| May 1, 2026 | Florance Andrew C | President and CEO | BUY | 3,100 | $36 | ~$0.1M |
| March 15, 2026 | Boxer Gene | General Counsel and Secretary | TAX_WITHHOLD | -482 | $44 | ~$21K |
| March 15, 2026 | Ruggles Lisa | Senior VP, Global Operations | TAX_WITHHOLD | -2,977 | $44 | ~$0.1M |
| Date | Filer | Relationship | Est. shares | Filing |
|---|---|---|---|---|
| August 5, 2026 | Hill John W | — | 3,500 | SEC |
| Date | Insider | Title | Relationship | Shares | Filing |
|---|---|---|---|---|---|
| August 4, 2026 | — | — | — | — | SEC |
| Institution | Shares | Value ($) | Change % | Filing date |
|---|---|---|---|---|
| Vanguard Group | 70,108,999 | ~$4.7B | — | January 29, 2026 |
| BlackRock | 38,561,085 | ~$2.9B | — | August 13, 2024 |
| BlackRock | 33,970,626 | ~$2.3B | — | February 12, 2026 |
| BlackRock | 33,808,184 | ~$1.4B | -0.5% | May 13, 2026 |
| State Street | 18,632,352 | ~$1.3B | — | February 13, 2026 |
| BlackRock | 33,813,969 | ~$957.6M | 0.0% | August 7, 2026 |
| State Street | 18,650,975 | ~$752.4M | 0.1% | May 15, 2026 |
| State Street | 18,410,876 | ~$521.4M | -1.3% | August 7, 2026 |
| Goldman Sachs | 9,254,712 | ~$373.3M | 146.7% | May 15, 2026 |
| Morgan Stanley | 5,291,136 | ~$355.8M | — | May 27, 2026 |
| Goldman Sachs | 3,751,528 | ~$252.3M | — | March 25, 2026 |
| AQR Capital | 8,445,474 | ~$239.2M | 568.8% | August 14, 2026 |
| DE Shaw | 5,909,623 | ~$238.4M | 552.6% | May 15, 2026 |
| Morgan Stanley | 5,412,615 | ~$218.3M | 2.3% | May 15, 2026 |
| Morgan Stanley | 5,485,870 | ~$155.4M | 1.4% | August 13, 2026 |
| Tiger Global | 2,259,109 | ~$151.9M | — | February 17, 2026 |
| JP Morgan Chase | 4,984,994 | ~$146.7M | 168.3% | August 12, 2026 |
| Goldman Sachs | 5,129,484 | ~$145.3M | -44.6% | August 14, 2026 |
| Fidelity (FMR) | 2,831,524 | ~$114.2M | 135.5% | May 15, 2026 |
| Fidelity (FMR) | 1,202,153 | ~$80.8M | — | February 17, 2026 |