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Andrew C. Florance

CSGP
PRESIDENT AND CEO · COSTAR GROUP, INC. · CIK 0001066061
FILING MIX · LIFETIME41%/59%
BUYS
27
SELLS
39
TOTAL VALUE
$160.64M
COMPANIES
1
ACTIVE SINCE
Dec 2019
HOLDINGS NOW
1,719,765
AVG SELL PX
$157.67
TRADE KIND
SHOWING 66 / 66
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
9 backtested trades · 8 horizons · 12 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Andrew C. Florance, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d9+44.44%-0.89%-0.74%-0.14%-0.13%—
14d9+66.67%-5.00%-2.69%-2.32%-1.01%—
30d9+44.44%-3.09%-3.99%+2.09%+3.85%—
60d9+33.33%-4.60%+1.60%-6.20%-3.82%—
90d9(2 pending)+14.29%-2.58%+5.42%-3.90%-4.57%—
180d9(3 pending)+33.33%+6.32%+8.31%-1.99%-8.12%—
1y9(3 pending)+66.67%+0.50%+23.54%-23.04%-23.69%—
2y9(4 pending)+80.00%-11.90%+24.83%-36.73%-36.50%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
CSGP · 1,719,765.03 shares · as of May 1, 2026
0430,716861,4331,292,1491,722,8652020202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2019
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 27 buys / 39 sellsCOVERAGE · 27 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
3,100$35.82$111.0K1,722,865.03May 1, 2026May 4, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
68,330$35.17$2.40M1,719,765.03May 1, 2026May 4, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
124,162——1,651,435.03Mar 10, 2026Mar 11, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
59,593$44.63$2.66M1,527,273.03Mar 1, 2026Mar 3, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
83,708——83,708Feb 27, 2026Mar 3, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
55,720$44.52$2.48M1,586,866.03Feb 27, 2026Mar 2, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
19,221$49.07$943.2K1,531,146.03Feb 19, 2026Feb 23, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
104,983——1,550,367.03Feb 19, 2026Feb 23, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
17,482$44.99$786.5K1,655,350.03Feb 15, 2026Feb 18, 2026 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
76,232——1,672,832.03Mar 5, 2025Mar 7, 2025 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
41,296$76.25$3.15M1,596,600.03Mar 1, 2025Mar 3, 2025 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
114,000——114,000Feb 20, 2025Feb 24, 2025 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
451,440——1,637,896.03Feb 20, 2025Feb 24, 2025 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
14,235$74.06$1.05M1,248,863.03Feb 15, 2025Feb 19, 2025 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
33,511$73.27$2.46M1,186,456.03Feb 13, 2025Feb 24, 2025 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
28,896——1,219,967.03Feb 13, 2025Feb 24, 2025 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
14,731.03$74.67$1.10M1,263,098.03Oct 25, 2024Oct 28, 2024 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
24,228$87.03$2.11M1,248,367Mar 1, 2024Mar 5, 2024 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
31,200——926,813Feb 22, 2024Feb 26, 2024 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
367,840——1,272,595Feb 22, 2024Feb 26, 2024 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
90,500——90,500Feb 22, 2024Feb 26, 2024 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
22,058$83.98$1.85M904,755Feb 22, 2024Feb 26, 2024 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
16,296$82.32$1.34M958,013Feb 15, 2024Feb 20, 2024 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
360,530$18.28$6.59M1,334,839Apr 28, 2023May 2, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
360,530$76.77$27.68M974,309Apr 28, 2023May 2, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
360,530——0Apr 28, 2023May 2, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
9,261$67.62$626.2K974,309Mar 15, 2023Mar 17, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
37,844——983,570Mar 15, 2023Mar 17, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
24,224$70.66$1.71M964,087Mar 1, 2023Mar 3, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
12,471$76.78$957.5K988,311Feb 15, 2023Feb 16, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
285,900——1,000,782Feb 14, 2023Feb 16, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
73,400——73,400Feb 14, 2023Feb 16, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
68,537——714,882Feb 14, 2023Feb 16, 2023 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
48——783,419Sep 14, 2022Sep 15, 2022 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
11,541$61.01$704.1K783,371Mar 1, 2022Mar 3, 2022 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
199,900——794,912Feb 16, 2022Feb 18, 2022 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
50,570$67.69$3.42M595,012Feb 16, 2022Feb 18, 2022 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
101,400——101,400Feb 16, 2022Feb 18, 2022 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
34,685——645,582Feb 16, 2022Feb 18, 2022 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
32,383$65.99$2.14M680,267Feb 15, 2022Feb 18, 2022 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
19,570$818.37$16.02M76,085Mar 10, 2021Mar 11, 2021 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
5,522$823.76$4.55M95,655Feb 28, 2021Mar 2, 2021 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
799——101,177Feb 28, 2021Mar 2, 2021 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
18,160——101,976Feb 18, 2021Feb 19, 2021 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
8,000——8,000Feb 18, 2021Feb 19, 2021 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
3,305$939.76$3.11M83,816Feb 15, 2021Feb 17, 2021 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
15,584——0Aug 27, 2020Aug 28, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
15,584$851.66$13.27M107,121Aug 27, 2020Aug 28, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
15,584$193.69$3.02M122,705Aug 27, 2020Aug 28, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
15,584$848.16$13.22M107,121Aug 26, 2020Aug 28, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
15,584——15,584Aug 26, 2020Aug 28, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
15,584$193.69$3.02M122,705Aug 26, 2020Aug 28, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALEGRANT
Gift
20,000——87,121May 7, 2020Jan 4, 2021 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
3,026$599.99$1.82M107,121Mar 31, 2020Apr 2, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
33,600$201.04$6.75M143,747Mar 2, 2020Mar 3, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
5,447$667.59$3.64M110,147Mar 2, 2020Mar 3, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
33,600$663.90$22.31M110,147Mar 2, 2020Mar 3, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
33,600——0Mar 2, 2020Mar 3, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
2,527$667.59$1.69M115,594Feb 29, 2020Mar 3, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
2,276$731.37$1.66M118,121Feb 15, 2020Feb 19, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
22,520——120,397Feb 6, 2020Feb 10, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASEGRANT
Stock grant
16,200——16,200Feb 6, 2020Feb 10, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
547$182.75$100.0K97,877Dec 31, 2019Jan 2, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
PURCHASE
President and CEO
1,032$193.69$199.9K97,330Dec 31, 2019Jan 2, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
547——36,053Dec 31, 2019Jan 2, 2020 ↗View →
CSGP
COSTAR GROUP, INC.
SALE
President and CEO
1,032——31,168Dec 31, 2019Jan 2, 2020 ↗View →
Other insiders · CSGP
Loading peer insiders…
About this filer
CIK 0001066061
ROLE
President and CEO
PRIMARY
CSGP
COMPANIES
1
ACTIVE SINCE
Dec 2019
MARKETPEEL · /INSIDER/0001066061DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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