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Ostrum Asset Management’s CoStar Group CSGP Stock Holding History

Ostrum Asset Management’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 		$262K Buy
9,234
+4,463
+94% +$154K 0.01% 501
2026
Q1 		$192K Buy
4,771
+70
+1% +$3.64K 0.01% 523
2025
Q4 		$316K Sell
4,701
-1,558
-25% -$110K 0.02% 419
2025
Q3 		$528K Sell
6,259
-194
-3% -$17.1K 0.02% 399
2025
Q2 		$519K Sell
6,453
-1,522
-19% -$119K 0.02% 402
2025
Q1 		$632K Sell
7,975
-16,825
-68% -$1.28M 0.03% 377
2024
Q4 		$1.78M Buy
24,800
+18,274
+280% +$1.38M 0.15% 215
2024
Q3 		$492K Sell
6,526
-5,216
-44% -$396K 0.04% 400
2024
Q2 		$871K Sell
11,742
-5,496
-32% -$466K 0.08% 316
2024
Q1 		$1.67M Buy
17,238
+1,240
+8% +$107K 0.13% 258
2023
Q4 		$1.4M Buy
15,998
+1,599
+11% +$129K 0.12% 252
2023
Q3 		$1.11M Buy
14,399
+7,722
+116% +$640K 0.1% 287
2023
Q2 		$594K Buy
6,677
+5
+0.1% +$386 0.05% 408
2023
Q1 		$459K Buy
+6,672
New +$492K 0.04% 438

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

Ostrum Asset Management's CSGP Position: Q2 2026 in Review

Ostrum Asset Management increased its CoStar Group (CSGP) stake by 94% in Q2 2026, buying an estimated $154K and bringing the position to 9,234 shares worth $262K. The position accounts for 0.01% of the portfolio, ranked #501.

Ostrum Asset Management first reported a position in CSGP in Q1 2023 and has held it in 14 quarters since. The position peaked at $1.78M in Q4 2024. 757 funds tracked by Wall St. Rank hold CSGP as of Q2 2026.

  • Ostrum Asset Management held 9,234 shares of CoStar Group worth $262K as of Q2 2026.
  • Ostrum Asset Management bought 4,463 CoStar Group shares in Q2 2026, an estimated $154K.
  • CoStar Group made up 0.01% of Ostrum Asset Management's portfolio in Q2 2026, its #501 holding.
  • Ostrum Asset Management first reported a position in CoStar Group in Q1 2023 and has held it in 14 quarters since.
  • Ostrum Asset Management's CoStar Group position peaked at $1.78M in Q4 2024.
  • 757 funds tracked by Wall St. Rank held CoStar Group as of Q2 2026.

Based on Ostrum Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.