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Livermore
Livermore
ZHEN

Janus Henderson Group PLC

SEC CIK
0001274173
Latest filing
May 18, 2026

CSGP holding history

Costar Group, Inc. in every 13F filed by Janus Henderson Group PLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

CSGP overviewAll 13F holders of CSGPFull Q1 2026 holdings

Shares (Q1 2026)
7,724,152
Value
$311.6M
% of portfolio
0.1%
Quarters held
21
Since Q1 2021
Holdings of CSGP by Janus Henderson Group PLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q1 20267,724,152$311.6M0.1%+250,772+3.4%AddedHolders
Q4 20257,473,380$502.5M0.2%+1,256,573+20.2%AddedHolders
Q3 20256,216,807$524.5M0.2%+2,180,980+54.0%AddedHolders
Q2 20254,035,827$324.5M0.2%+3,982,866+7,520.4%AddedHolders
Q1 202552,961$4.20M<0.1%−5,467−9.4%ReducedHolders
Q4 202458,428$4.18M<0.1%−6,568,801−99.1%ReducedHolders
Q3 20246,627,229$500.0M0.3%−5,487,301−45.3%ReducedHolders
Q2 202412,114,530$898.2M0.5%+306,503+2.6%AddedHolders
Q1 202411,808,027$1.14B0.6%+1,773,564+17.7%AddedHolders
Q4 202310,034,463$876.9M0.5%+1,050,656+11.7%AddedHolders
Q3 20238,983,807$690.8M0.5%−2,087,735−18.9%ReducedHolders
Q2 202311,071,542$985.4M0.6%−2,009,764−15.4%ReducedHolders
Q1 202313,081,306$900.6M0.6%+82,995+0.6%AddedHolders
Q4 202212,998,311$1.00B0.7%−1,512,513−10.4%ReducedHolders
Q3 202214,510,824$1.01B0.8%−146,640−1.0%ReducedHolders
Q2 202214,657,464$885.5M0.6%−263,178−1.8%ReducedHolders
Q1 202214,920,642$993.9M0.5%+2,814,674+23.3%AddedHolders
Q4 202112,105,968$956.7M0.4%+446,780+3.8%AddedHolders
Q3 202111,659,188$1.00B0.4%−58,783−0.5%ReducedHolders
Q2 202111,717,971$970.5M0.4%−3,314,729−22.1%ReducedConverted for a 10-for-1 splitHolders
Q1 20211,503,270$1.24B0.6%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.