Why Investors Keep Doubting CoStar Group (CSGP)
Polen Capital Management Llc released its “Polen Focus Growth Strategy” Q2 2026 investor letter. A copy of the letter can be downloaded here.
Costar Group Inc. (CSGP)
Market is closed
Sector: Services-Business Services, Nec
Hedge Fund Popularity
Hedge Fund Holdings
Filing Period:
Last updated on based on SEC 13F filings Last update:
| No. | Hedge Fund | Shares | Value | Activity | % Port |
|---|---|---|---|---|---|
| 1. | BAMCO Inc. Ron Baron | 21,626,763 | $612,469,928 | +33% | 0.92% |
| 2. | Akre Capital Management Charles Akre | 11,699,396 | $331,326,895 | +14% | 6.47% |
| 3. | AQR Capital Management Cliff Asness | 8,445,474 | $239,175,807 | +569% | 0.08% |
| 4. | Squarepoint Ops LLC Maxime Fortin (Cio) | 1,442,049 | $40,838,828 | +85% | 0.05% |
| 5. | Marshall Wace LLP Paul Marshall And Ian Wace | 1,381,204 | $39,115,697 | +168% | 0.03% |
Insider Trading: Purchases See All
| Insider | Price | Amount | Total Value | Remaining Holdings | Date | Form 4 |
|---|---|---|---|---|---|---|
| $29.89 | 83,300 | $2,489,837.00 | 1,806,165 | 2026-08-04 | Filing | |
| $35.82 | 3,100 | $111,042.00 | 1,722,865 | 2026-05-01 | Filing | |
| $35.17 | 68,330 | $2,403,166.10 | 1,719,765 | 2026-05-01 | Filing | |
| $48.36 | 1,000 | $48,360.00 | 20,409 | 2026-03-06 | Filing | |
| $44.94 | 1,000 | $44,940.00 | 4,157 | 2026-03-02 | Filing |
Insider Trading: Sales See All
| Insider | Price | Amount | Total Value | Remaining Holdings | Date | Form 4 |
|---|---|---|---|---|---|---|
| $30.78 | 4,788 | $147,374.64 | 18,822 | 2026-08-07 | Filing | |
| $30.21 | 3,500 | $105,735.00 | 22,993 | 2026-08-05 | Filing | |
| $68.68 | 2,250 | $154,530.00 | 18,231 | 2025-11-13 | Filing | |
| $68.79 | 1,841 | $126,642.39 | 23,211 | 2025-11-13 | Filing | |
| $90.33 | 25,000 | $2,258,250.00 | 293,103 | 2025-08-28 | Filing |
Institutional Investors' Holdings
Filing Period:
| No. | Name | Shares | Value | % Port |
|---|---|---|---|---|
| 1. | 37,914,844 | $1,073,748,382 | 0.05% | |
| 2. | 33,813,969 | $957,611,618 | 0.01% | |
| 3. | 26,683,792 | $755,684,989 | 0.02% | |
| 4. | 18,410,876 | $521,396,008 | 0.02% | |
| 5. | 16,643,016 | $471,330,213 | 0.1% |
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