Mariner
CSGP icon

Mariner’s CoStar Group CSGP Stock Holding History

Mariner’s Portfolio CSGP Stock Details CSGP Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$10.1M Buy
357,114
+247,575
+226% +$8.52M 0.01% 731
2026
Q1 		$4.42M Buy
109,539
+61,522
+128% +$3.2M 0.01% 1107
2025
Q4 		$3.23M Sell
48,017
-7,552
-14% -$535K ﹤0.01% 1223
2025
Q3 		$4.69M Buy
55,569
+7,364
+15% +$651K 0.01% 955
2025
Q2 		$3.88M Sell
48,205
-1,186
-2% -$92.4K 0.01% 983
2025
Q1 		$3.91M Buy
49,391
+6,814
+16% +$518K 0.01% 914
2024
Q4 		$3.05M Sell
42,577
-39,121
-48% -$2.95M 0.01% 1002
2024
Q3 		$6.16M Buy
81,698
+7,975
+11% +$605K 0.01% 715
2024
Q2 		$5.47M Buy
73,723
+35,555
+93% +$3.01M 0.01% 691
2024
Q1 		$3.69M Buy
38,168
+2,169
+6% +$187K 0.01% 847
2023
Q4 		$3.15M Buy
35,999
+778
+2% +$63K 0.01% 863
2023
Q3 		$2.71M Buy
35,221
+216
+0.6% +$17.9K 0.01% 849
2023
Q2 		$3.12M Buy
35,005
+4,524
+15% +$349K 0.01% 814
2023
Q1 		$2.1M Sell
30,481
-11,113
-27% -$820K 0.01% 934
2022
Q4 		$3.21M Buy
41,594
+4,982
+14% +$389K 0.01% 741
2022
Q3 		$2.55M Buy
36,612
+6,279
+21% +$436K 0.01% 683
2022
Q2 		$1.83M Buy
30,333
+9,549
+46% +$578K 0.01% 731
2022
Q1 		$1.38M Buy
20,784
+2,964
+17% +$197K 0.01% 841
2021
Q4 		$1.41M Sell
17,820
-944
-5% -$79.2K 0.01% 740
2021
Q3 		$1.61M Buy
18,764
+707
+4% +$61.1K 0.01% 582
2021
Q2 		$1.5M Buy
+18,057
New +$1.56M 0.01% 559
2019
Q3 		– Sell
-11,210
Closed -$621K – 755
2019
Q2 		$621K Buy
11,210
+3,930
+54% +$201K 0.01% 652
2019
Q1 		$340K Buy
+7,280
New +$301K ﹤0.01% 774

Other funds holding CSGP

Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
BAMCO Inc
BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
ACM
AKRE Capital Management Middleburg, Virginia $5.12B AUM 19.08% 1-Year Est. Return
Polen Capital Management
Polen Capital Management Boca Raton, Florida $11.6B AUM 8.03% 1-Year Est. Return

Mariner's CSGP Position: Q2 2026 in Review

Mariner increased its CoStar Group (CSGP) stake by 226% in Q2 2026, buying an estimated $8.52M and bringing the position to 357,114 shares worth $10.1M. The position accounts for 0.01% of the portfolio, ranked #731.

Mariner first reported a position in CSGP in Q1 2019 and has held it in 23 quarters since. 758 funds tracked by Wall St. Rank hold CSGP as of Q2 2026.

  • Mariner held 357,114 shares of CoStar Group worth $10.1M as of Q2 2026.
  • Mariner bought 247,575 CoStar Group shares in Q2 2026, an estimated $8.52M.
  • CoStar Group made up 0.01% of Mariner's portfolio in Q2 2026, its #731 holding.
  • Mariner first reported a position in CoStar Group in Q1 2019 and has held it in 23 quarters since.
  • 758 funds tracked by Wall St. Rank held CoStar Group as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.