BAMCO Inc’s CoStar Group CSGP Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$658M Sell
16,314,175
-3,183,924
-16% -$166M 1.99% 14
2025
Q4
$1.31B Buy
19,498,099
+242,533
+1% +$17.2M 3.55% 4
2025
Q3
$1.62B Sell
19,255,566
-424,369
-2% -$37.5M 4.31% 3
2025
Q2
$1.58B Buy
19,679,935
+647,413
+3% +$50.4M 4.29% 3
2025
Q1
$1.51B Sell
19,032,522
-171,042
-0.9% -$13M 4.43% 4
2024
Q4
$1.37B Buy
19,203,564
+418,128
+2% +$31.6M 3.55% 4
2024
Q3
$1.42B Sell
18,785,436
-485,562
-3% -$36.8M 3.76% 4
2024
Q2
$1.43B Sell
19,270,998
-66,620
-0.3% -$5.65M 4.09% 4
2024
Q1
$1.87B Sell
19,337,618
-53,665
-0.3% -$4.62M 4.98% 4
2023
Q4
$1.69B Buy
19,391,283
+194,781
+1% +$15.8M 4.51% 3
2023
Q3
$1.48B Buy
19,196,502
+91,399
+0.5% +$7.57M 4.29% 4
2023
Q2
$1.7B Buy
19,105,103
+135,022
+0.7% +$10.4M 4.71% 2
2023
Q1
$1.31B Sell
18,970,081
-140,122
-0.7% -$10.3M 3.92% 4
2022
Q4
$1.48B Sell
19,110,203
-144,677
-0.8% -$11.3M 4.96% 3
2022
Q3
$1.34B Buy
19,254,880
+17,360
+0.1% +$1.21M 4.33% 3
2022
Q2
$1.16B Buy
19,237,520
+388,347
+2% +$23.5M 3.73% 3
2022
Q1
$1.26B Buy
18,849,173
+350,382
+2% +$23.3M 3.08% 4
2021
Q4
$1.46B Sell
18,498,791
-140,948
-0.8% -$11.8M 3.1% 4
2021
Q3
$1.6B Sell
18,639,739
-153,521
-0.8% -$13.3M 3.63% 4
2021
Q2
$1.56B Sell
18,793,260
-609,330
-3% -$52.7M 3.56% 3
2021
Q1
$1.59B Buy
19,402,590
+56,760
+0.3% +$4.9M 3.93% 2
2020
Q4
$1.79B Sell
19,345,830
-683,880
-3% -$60M 4.42% 2
2020
Q3
$1.7B Sell
20,029,710
-979,780
-5% -$78.1M 5.22% 2
2020
Q2
$1.49B Buy
21,009,490
+9,500
+0% +$614K 5.4% 2
2020
Q1
$1.23B Sell
20,999,990
-1,727,680
-8% -$113M 6.04% 1
2019
Q4
$1.36B Sell
22,727,670
-1,235,770
-5% -$72.1M 5.19% 1
2019
Q3
$1.42B Sell
23,963,440
-212,800
-0.9% -$12.7M 5.85% 1
2019
Q2
$1.34B Sell
24,176,240
-309,130
-1% -$15.8M 5.37% 1
2019
Q1
$1.14B Sell
24,485,370
-20,940
-0.1% -$865K 4.84% 1
2018
Q4
$827M Sell
24,506,310
-194,240
-0.8% -$7.1M 4.18% 3
2018
Q3
$1.04B Sell
24,700,550
-129,730
-0.5% -$5.54M 4.31% 3
2018
Q2
$1.02B Sell
24,830,280
-470,130
-2% -$18.1M 4.48% 2
2018
Q1
$918M Sell
25,300,410
-941,770
-4% -$32.5M 4.22% 2
2017
Q4
$779M Sell
26,242,180
-2,613,010
-9% -$76.6M 3.59% 3
2017
Q3
$774M Sell
28,855,190
-220,720
-0.8% -$6.13M 3.67% 4
2017
Q2
$766M Sell
29,075,910
-917,950
-3% -$22.3M 3.92% 4
2017
Q1
$622M Buy
29,993,860
+14,410
+0% +$293K 3.29% 5
2016
Q4
$565M Buy
29,979,450
+1,090,610
+4% +$21.4M 3.18% 5
2016
Q3
$626M Sell
28,888,840
-109,830
-0.4% -$2.34M 3.32% 5
2016
Q2
$634M Sell
28,998,670
-275,520
-0.9% -$5.45M 3.37% 3
2016
Q1
$551M Buy
29,274,190
+521,530
+2% +$9.23M 2.91% 4
2015
Q4
$594M Sell
28,752,660
-194,770
-0.7% -$3.88M 2.75% 4
2015
Q3
$501M Sell
28,947,430
-255,110
-0.9% -$4.89M 2.26% 7
2015
Q2
$588M Buy
29,202,540
+20,260
+0.1% +$413K 2.31% 4
2015
Q1
$577M Buy
29,182,280
+298,830
+1% +$5.64M 2.23% 3
2014
Q4
$530M Buy
28,883,450
+557,800
+2% +$9.01M 2.13% 5
2014
Q3
$441M Buy
28,325,650
+4,642,450
+20% +$69.2M 1.83% 6
2014
Q2
$375M Buy
23,683,200
+1,597,330
+7% +$25.9M 1.49% 11
2014
Q1
$412M Buy
22,085,870
+2,054,620
+10% +$38.8M 1.68% 6
2013
Q4
$370M Buy
20,031,250
+279,640
+1% +$4.95M 1.53% 11
2013
Q3
$332M Buy
19,751,610
+345,550
+2% +$5.3M 1.52% 12
2013
Q2
$250M Buy
+19,406,060
New +$220M 1.3% 17

Other funds holding CSGP

BAMCO Inc's CSGP Position: Q1 2026 in Review

BAMCO Inc reduced its CoStar Group (CSGP) stake by 16% in Q1 2026, selling an estimated $166M and leaving 16,314,175 shares worth $658M. The position accounts for 1.99% of the portfolio, ranked #14.

BAMCO Inc first reported a position in CSGP in Q2 2013 and has held it in 52 quarters since. The position peaked at $1.87B in Q1 2024. 792 funds tracked by Wall St. Rank hold CSGP as of Q1 2026.

  • BAMCO Inc held 16,314,175 shares of CoStar Group worth $658M as of Q1 2026.
  • BAMCO Inc sold 3,183,924 CoStar Group shares in Q1 2026, an estimated $166M.
  • CoStar Group made up 1.99% of BAMCO Inc's portfolio in Q1 2026, its #14 holding.
  • BAMCO Inc first reported a position in CoStar Group in Q2 2013 and has held it in 52 quarters since.
  • BAMCO Inc's CoStar Group position peaked at $1.87B in Q1 2024.
  • 792 funds tracked by Wall St. Rank held CoStar Group as of Q1 2026.

Based on BAMCO Inc's 13F filing for Q1 2026, filed 15 May 2026.