Tom Gayner's CSGP Position Overview
Tom Gayner (via Markel Group Inc.) currently holds 18.6K shares of CoStar Group, Inc. (CSGP) worth $0, representing 0.00% of the portfolio. First purchased in 2021-Q4, this medium-term investment has been held for 16 quarters.
Based on 13F filings, Tom Gayner has maintained a strategic position in CSGP, demonstrating sustained confidence in this investment. Largest addition occurred in Q1 2022, adding 14.5K shares.
Analysis based on 13F filings available since 2013 Q2
Tom Gayner's CoStar Group (CSGP) Holding Value Over Time
Track share changes against reported price movement
Quarterly CoStar Group (CSGP) Trades by Tom Gayner
| Period | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2021 | +3,100 | New Buy | 3,100 | $79.03 |
| Q1 2022 | +14,500 | Add 467.74% | 17,600 | $66.59 |
| Q2 2022 | +1,000 | Add 5.68% | 18,600 | $60.38 |
| Q3 2025 | -18,600 | Sold Out | 18,600 | $0.00 |
Tom Gayner's CoStar Group Investment FAQs
Tom Gayner first purchased CoStar Group, Inc. (CSGP) in Q4 2021, acquiring 3,100 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Tom Gayner has held CoStar Group, Inc. (CSGP) for 16 quarters since Q4 2021. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Tom Gayner's largest addition to CoStar Group, Inc. (CSGP) was in Q1 2022, adding 17,600 shares worth $1.17 M. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
According to the latest 13F filing for Q3 2025, Tom Gayner's firm, Markel Group Inc., owns 18,600 shares of CoStar Group, Inc. (CSGP), valued at approximately $0. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
As of the Q3 2025 filing, CoStar Group, Inc. (CSGP) represents approximately 0.00% of Tom Gayner's publicly disclosed stock portfolio, making it one of their key holdings. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Tom Gayner's peak holding in CoStar Group, Inc. (CSGP) was 18,600 shares, as reported at the end of Q2 2022. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.