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
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

VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return
Polen Capital Management
Polen Capital Management Boca Raton, Florida $14.5B AUM 5.7% 1-Year Est. Return

Mariner's CSGP Position: Q1 2026 in Review

Mariner increased its CoStar Group (CSGP) stake by 128% in Q1 2026, buying an estimated $3.2M and bringing the position to 109,539 shares worth $4.42M. The position accounts for 0.01% of the portfolio, ranked #1107.

Mariner first reported a position in CSGP in Q1 2019 and has held it in 22 quarters since. The position peaked at $6.16M in Q3 2024. 792 funds tracked by Wall St. Rank hold CSGP as of Q1 2026.

  • Mariner held 109,539 shares of CoStar Group worth $4.42M as of Q1 2026.
  • Mariner bought 61,522 CoStar Group shares in Q1 2026, an estimated $3.2M.
  • CoStar Group made up 0.01% of Mariner's portfolio in Q1 2026, its #1107 holding.
  • Mariner first reported a position in CoStar Group in Q1 2019 and has held it in 22 quarters since.
  • Mariner's CoStar Group position peaked at $6.16M in Q3 2024.
  • 792 funds tracked by Wall St. Rank held CoStar Group as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.