Who Owns Costar Group Inc
Every manager with more than $100m in listed equities files a 13F each quarter naming what they hold. These are the ones reporting a position in Costar Group Inc.
Who crossed 5% of CSGP →Positions as of 2026-09-30
Largest first. The move is against the previous quarter that manager filed, not the previous calendar quarter.
| Manager | Value |
|---|---|
| Douglas Lane & Associates, LLCCOMMON2M shadded | $54.3M |
| S.E.E.D. Planning Group LLCCOM318.7K shadded | $8.7M |
| Red Spruce Capital, LLCCOM72.9K shtrimmed | $2M |
| GAMMA Investing LLCCommon Stock15.6K shadded | $427.7K |
| Lincoln Capital LLCCOM14.2K shtrimmed | $387.6K |
| Wedmont Private CapitalCOM10.1K shtrimmed | $300.9K |
| Farther Finance Advisors, LLCStock6.9K shadded | $189.6K |
| MassMutual Private Wealth & Trust, FSBCommon / Ordinary Stock2.4K shadded | $64.8K |
| GILPIN WEALTH MANAGEMENT, LLCCOM229 sh— | $6.3K |
| GK Wealth Management LLCCOM220 sh— | $6K |
| AMERICAN NATIONAL BANK & TRUSTCOM96 sh— | $2.6K |
| CoreCap Advisors, LLCStock47 shtrimmed | $1.3K |
| Davis Capital ManagementStock39 shtrimmed | $1.1K |
| ELEVATION WEALTH PARTNERS, LLCCOM36 shtrimmed | $987 |
| Marquette Asset Management, LLCCOM18 shtrimmed | $494 |
| Grove Bank & TrustCOM2 shheld | $55 |
| EASTERN BANKCOM1 shheld | $27 |
Source: quarterly 13F filings, via EDGAR. A 13F reports positions by CUSIP alone; each CUSIP here has been confirmed against OpenFIGI rather than matched by name, because a name match would attribute one company's shareholders to another. Positions are as of quarter end and can be months old by the time they are filed, and 13F covers long equity positions only — not shorts, and not most debt. The summed value is what these filers reported, not the company's institutional ownership.
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