Aureus Asset Management’s CoStar Group CSGP Stock Holding History

Aureus 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	-337,117	Closed	-$22.7M	–	236
2025 Q4	$22.7M	Sell	337,117 -1,960	-0.6%	-$139K	1.44%	26
2025 Q3	$28.6M	Buy	339,077 +85,348	+34%	+$7.54M	1.86%	24
2025 Q2	$20.4M	Sell	253,729 -6,495	-2%	-$506K	1.3%	28
2025 Q1	$20.6M	Buy	260,224 +10,688	+4%	+$813K	1.44%	26
2024 Q4	$17.9M	Sell	249,536 -30,271	-11%	-$2.29M	1.15%	30
2024 Q3	$21.1M	Buy	+279,807	New	+$21.2M	1.38%	28

Other funds holding CSGP

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return

BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return

Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return

Polen Capital Management Boca Raton, Florida $14.5B AUM 5.7% 1-Year Est. Return

Aureus Asset Management's CSGP Position: Q1 2026 in Review

Aureus Asset Management sold out of CoStar Group (CSGP) in Q1 2026, closing a stake of 337,117 shares — an estimated $22.7M sold.

Aureus Asset Management first reported a position in CSGP in Q3 2024 and held it in 6 quarters. The position peaked at $28.6M in Q3 2025. 792 funds tracked by Wall St. Rank hold CSGP as of Q1 2026.

Aureus Asset Management reported no remaining CoStar Group position as of Q1 2026 after selling out during the quarter.
Aureus Asset Management sold 337,117 CoStar Group shares in Q1 2026, an estimated $22.7M.
Aureus Asset Management first reported a position in CoStar Group in Q3 2024 and held it in 6 quarters.
Aureus Asset Management's CoStar Group position peaked at $28.6M in Q3 2025.
792 funds tracked by Wall St. Rank held CoStar Group as of Q1 2026.

Based on Aureus Asset Management's 13F filing for Q1 2026, filed 13 May 2026.