Andreas Halvorsen's CSGP Position Overview
Andreas Halvorsen (via Viking Global Investors Lp) currently holds 1.44 M shares of CoStar Group, Inc. (CSGP) worth $97 M, representing 0.26% of the portfolio. First purchased in 2020-Q3, this medium-term investment has been held for 9 quarters.
Based on 13F filings, Andreas Halvorsen has maintained a strategic position in CSGP, demonstrating sustained confidence in this investment. Largest addition occurred in Q2 2025, adding 3.22 M shares. Largest reduction occurred in Q4 2020, reducing 2.29 M shares.
Analysis based on 13F filings available since 2013 Q2
Andreas Halvorsen's CoStar Group (CSGP) Holding Value Over Time
Track share changes against reported price movement
Quarterly CoStar Group (CSGP) Trades by Andreas Halvorsen
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -407,147 | Reduce 22.01% | 1.44 M | $67.24 |
| Q3 2025 | -1.37 M | Reduce 42.53% | 1.85 M | $84.37 |
| Q2 2025 | +3.22 M | New Buy | 3.22 M | $80.40 |
| Q1 2025 | -1.16 M | Sold Out | 0 | $0.00 |
| Q4 2024 | -98,492 | Reduce 7.81% | 1.16 M | $71.59 |
| Q3 2024 | +1.26 M | New Buy | 1.26 M | $75.44 |
| Q1 2021 | -709,490 | Sold Out | 0 | $0.00 |
| Q4 2020 | -2.29 M | Reduce 76.36% | 709,490 | $92.43 |
| Q3 2020 | +3 M | New Buy | 3 M | $84.85 |
Andreas Halvorsen's CoStar Group Investment FAQs
Andreas Halvorsen first purchased CoStar Group, Inc. (CSGP) in Q3 2020, acquiring 3,001,460 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Andreas Halvorsen has held CoStar Group, Inc. (CSGP) for 9 quarters since Q3 2020.
Andreas Halvorsen's largest addition to CoStar Group, Inc. (CSGP) was in Q2 2025, adding 3,218,568 shares worth $258.77 M.
According to the latest 13F filing for Q4 2025, Andreas Halvorsen's firm, Viking Global Investors Lp, owns 1,442,582 shares of CoStar Group, Inc. (CSGP), valued at approximately $97 M.
As of the Q4 2025 filing, CoStar Group, Inc. (CSGP) represents approximately 0.26% of Andreas Halvorsen's publicly disclosed stock portfolio, making it one of their key holdings.
Andreas Halvorsen's peak holding in CoStar Group, Inc. (CSGP) was 3,218,568 shares, as reported at the end of Q2 2025.