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Rational Advisors’s CoStar Group CSGP Stock Holding History

Rational Advisors’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 		$4.39K Buy
155
+16
+12% +$550 ﹤0.01% 191
2026
Q1 		$5.61K Hold
139
– – ﹤0.01% 175
2025
Q4 		$9.35K Buy
139
+7
+5% +$496 ﹤0.01% 174
2025
Q3 		$11.1K Buy
132
+24
+22% +$2.12K ﹤0.01% 177
2025
Q2 		$8.68K Buy
+108
New +$8.41K ﹤0.01% 183
2020
Q4 		– Sell
-10
Closed -$1K – 294
2020
Q3 		$1K Buy
+10
New +$797 ﹤0.01% 516
2019
Q4 		– Sell
-38,840
Closed -$2.3M – 543
2019
Q3 		$2.3M Buy
38,840
+25,460
+190% +$1.52M 0.89% 23
2019
Q2 		$741K Buy
+13,380
New +$684K 0.26% 129

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

Rational Advisors's CSGP Position: Q2 2026 in Review

Rational Advisors increased its CoStar Group (CSGP) stake by 12% in Q2 2026, buying an estimated $550 and bringing the position to 155 shares worth $4.39K. The position accounts for ﹤0.01% of the portfolio, ranked #191.

Rational Advisors first reported a position in CSGP in Q2 2019 and has held it in 8 quarters since. The position peaked at $2.3M in Q3 2019. 758 funds tracked by Wall St. Rank hold CSGP as of Q2 2026.

  • Rational Advisors held 155 shares of CoStar Group worth $4.39K as of Q2 2026.
  • Rational Advisors bought 16 CoStar Group shares in Q2 2026, an estimated $550.
  • CoStar Group made up ﹤0.01% of Rational Advisors's portfolio in Q2 2026, its #191 holding.
  • Rational Advisors first reported a position in CoStar Group in Q2 2019 and has held it in 8 quarters since.
  • Rational Advisors's CoStar Group position peaked at $2.3M in Q3 2019.
  • 758 funds tracked by Wall St. Rank held CoStar Group as of Q2 2026.

Based on Rational Advisors's 13F filing for Q2 2026, filed 24 Jul 2026.