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Picton Mahoney Asset Management’s CoStar Group CSGP Stock Holding History

Picton Mahoney 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
Q1 		– Sell
-500,000
Closed -$33.6M – 1286
2025
Q4 		$33.6M Buy
+500,000
New +$35.4M 0.26% 72

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 $3.38T AUM 44.17% 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

Picton Mahoney Asset Management's CSGP Position: Q2 2026 in Review

Picton Mahoney Asset Management opened a new position in CoStar Group (CSGP) in Q2 2026: 40,904 shares worth $1.16M. The stake represents 0.01% of the portfolio and ranks #700 among its holdings. This is a return to the name: Picton Mahoney Asset Management previously reported a position in CSGP as recently as Q4 2025.

Picton Mahoney Asset Management first reported a position in CSGP in Q1 2017 and has held it in 32 quarters since. The position peaked at $23.2M in Q2 2019. 760 funds tracked by Wall St. Rank hold CSGP as of Q2 2026.

  • Picton Mahoney Asset Management held 40,904 shares of CoStar Group worth $1.16M as of Q2 2026.
  • CoStar Group was a new Picton Mahoney Asset Management position in Q2 2026.
  • CoStar Group made up 0.01% of Picton Mahoney Asset Management's portfolio in Q2 2026, its #700 holding.
  • Picton Mahoney Asset Management first reported a position in CoStar Group in Q1 2017 and has held it in 32 quarters since.
  • Picton Mahoney Asset Management's CoStar Group position peaked at $23.2M in Q2 2019.
  • 760 funds tracked by Wall St. Rank held CoStar Group as of Q2 2026.

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