# CoStar Group (CSGP): value investors who own it | moatshark

3 value investors held CoStar Group in their Q3 2026 13F, led by Akre Capital Management, Polen Capital Management, Weitz Investment Management.

## 13F holders

| Manager | Portfolio | Value | Change | Quarters held |
| --- | --- | --- | --- | --- |
| Akre Capital Management | 6.5% | $331m | Added +13% | 27 |
| Polen Capital Management | 2.1% | $248m | Trimmed -30% | 7 |
| Weitz Investment Management | 0.8% | $12.0m | Trimmed -18% | 26 |

## Directors buying and selling (Form 4, last 12 months)

| Date | Who | Role | Bought or sold | Shares | Value |
| --- | --- | --- | --- | --- | --- |
| 2026-08-07 | Cann Cynthia Cammett | Chief Accounting Officer | Sold | 4788 | $147k |
| 2026-08-05 | Hill John W | Director | Sold | 3500 | $106k |
| 2026-08-04 | FLORANCE ANDREW C | Founder and CEO | Bought | 83300 | $2.5m |

## Fund holders

| Fund | Manager | Weight | Value | As at |
| --- | --- | --- | --- | --- |
| Akre Focus ETF | Akre Capital Management | 4.7% | $244m | 2026-07-31 |
| Polen Global Growth Fund | Polen Capital Management | 1.2% | $1.3m | 2026-07-31 |
| Weitz Partners Value Fund | Weitz Investment Management | 1.2% | $5.9m | 2026-06-30 |
| Weitz Large Cap Equity Fund | Weitz Investment Management | 0.9% | $5.9m | 2026-06-30 |

Source: SEC filings, via moatshark (https://www.moatshark.com/s/csgp). Values traded and returns are estimates. Not investment advice. Built 2026-10-21.