PEAK6’s CoStar Group CSGP Stock Holding History

PEAK6’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	$1.31M	Buy	+46,100	New	+$1.59M	﹤0.01%	1552
2026 Q1	–	Sell	-153,000	Closed	-$10.3M	–	2817
2025 Q4	$10.3M	Sell	153,000 -67,500	-31%	-$4.78M	0.02%	628
2025 Q3	$18.6M	Buy	220,500 +99,500	+82%	+$8.79M	0.03%	446
2025 Q2	$9.73M	Buy	121,000 +114,800	+1,852%	+$8.94M	0.02%	642
2025 Q1	$491K	Buy	+6,200	New	+$472K	﹤0.01%	2089

Other funds holding CSGP

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return

Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return

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 Boca Raton, Florida $11.6B AUM 8.03% 1-Year Est. Return

PEAK6's CSGP Position: Q2 2026 in Review

PEAK6 sold out of CoStar Group (CSGP) in Q2 2026, closing a stake of 26,037 shares — an estimated $896K sold.

PEAK6 first reported a position in CSGP in Q1 2025 and held it in 2 quarters. The position peaked at $8.05M in Q1 2025. 760 funds tracked by Wall St. Rank hold CSGP as of Q2 2026.

PEAK6 reported no remaining CoStar Group position as of Q2 2026 after selling out during the quarter.
PEAK6 sold 26,037 CoStar Group shares in Q2 2026, an estimated $896K.
PEAK6 first reported a position in CoStar Group in Q1 2025 and held it in 2 quarters.
PEAK6's CoStar Group position peaked at $8.05M in Q1 2025.
760 funds tracked by Wall St. Rank held CoStar Group as of Q2 2026.

Based on PEAK6's 13F filing for Q2 2026, filed 13 Aug 2026.