Andrew C. Florance
President and CEO at CoStar Group Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: CoStar Group Inc., 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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CoStar Group Inc. June 23, 202699.5%
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CoStar Group Inc. June 26, 202599.9%
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CoStar Group Inc. June 6, 202498.9%
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CoStar Group Inc. June 8, 202398.6%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 4, 2026 | CoStar Group Inc. | Open-market purchase | +83,300 | $29.89 | $2,489,837 |
| May 1, 2026 | CoStar Group Inc. | Open-market purchase | +68,330 | $35.17 | $2,403,166 |
| May 1, 2026 | CoStar Group Inc. | Open-market purchase | +3,100 | $35.82 | $111,042 |
| Mar 10, 2026 | CoStar Group Inc. | Grant or award | +124,162 | — | — |
| Mar 1, 2026 | CoStar Group Inc. | Shares withheld for tax | −59,593 | $44.63 | $2,659,636 |
| Feb 27, 2026 | CoStar Group Inc. | Open-market purchase | +55,720 | $44.52 | $2,480,654 |
| Feb 19, 2026 | CoStar Group Inc. | Sold back to the company | −104,983 | — | — |
| Feb 19, 2026 | CoStar Group Inc. | Shares withheld for tax | −19,221 | $49.07 | $943,174 |
| Feb 15, 2026 | CoStar Group Inc. | Shares withheld for tax | −17,482 | $44.99 | $786,515 |
| Mar 5, 2025 | CoStar Group Inc. | Grant or award | +76,232 | — | — |
| Mar 1, 2025 | CoStar Group Inc. | Shares withheld for tax | −41,296 | $76.25 | $3,148,820 |
| Feb 20, 2025 | CoStar Group Inc. | Grant or award | +451,440 | — | — |
| Feb 15, 2025 | CoStar Group Inc. | Shares withheld for tax | −14,235 | $74.06 | $1,054,244 |
| Feb 13, 2025 | CoStar Group Inc. | Sold back to the company | −28,896 | — | — |
| Feb 13, 2025 | CoStar Group Inc. | Shares withheld for tax | −33,511 | $73.27 | $2,455,351 |
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