# COSTAR GROUP INC COM

COSTAR GROUP INC COM is a security (CUSIP 22160N109) tracked across SEC portfolio filings. 807 institutional managers reported $17.1B on Form 13F as of 2026-06-30; 69 registered fund positions totaling $1.9B via N-PORT as of 2026-05-31.

## Summary

- Issuer: COSTAR GROUP INC
- Class: COM
- CUSIP: 22160N109
- Asset category: EC
- 13F holders: 807
- 13F value: $17.1B
- 13F period: 2026-06-30
- N-PORT fund positions: 69
- N-PORT value: $1.9B
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 807 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $4.7B | 70,108,999 |
| BlackRock, Inc. | New York, NY | $1.4B | 33,808,184 |
| STATE STREET CORP | BOSTON, MA | $752.4M | 18,650,975 |
| [BAMCO INC /NY/](https://search.stillhousedata.com/firm/110789) | NEW YORK, NY | $658.1M | 16,314,175 |
| Capital International Investors | Los Angeles, CA | $625.8M | 15,513,753 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $500.4M | 12,448,652 |
| AKRE CAPITAL MANAGEMENT LLC | Middleburg, VA | $417.4M | 10,348,273 |
| GOLDMAN SACHS GROUP INC | NEW YORK, NY | $373.3M | 9,245,812 |
| BAILLIE GIFFORD & CO | EDINBURGH, X0 | $372.5M | 13,154,165 |
| Invesco Ltd. | ATLANTA, GA | $355.4M | 8,810,523 |
| JANUS HENDERSON GROUP PLC | LONDON, X0 | $311.6M | 7,724,152 |
| [POLEN CAPITAL MANAGEMENT LLC](https://search.stillhousedata.com/firm/106093) | Boca Raton, FL | $248.1M | 8,759,314 |
| D. E. Shaw & Co., Inc. | New York, NY | $238.4M | 5,909,623 |
| MORGAN STANLEY | NEW YORK, NY | $218.3M | 5,412,615 |
| Capital Research Global Investors | Los Angeles, CA | $176.4M | 4,373,706 |

## Top fund holders (N-PORT)

_Showing 15 of 69 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Invesco QQQ Trust, Series 1](https://search.stillhousedata.com/fund/S000101292) | Invesco QQQ Trust, Series 1 | $356.7M | 9.58% |
| [American Funds Fundamental Investors](https://search.stillhousedata.com/fund/S000009227) | American Funds Fundamental Investors | $220.9M | 14.35% |
| State Street(R) SPDR(R) S&P 500(R) ETF Trust | State Street(R) SPDR(R) S&P 500(R) ETF Trust | $200.1M | 3.07% |
| [VANGUARD U.S. GROWTH FUND](https://search.stillhousedata.com/fund/S000004444) | VANGUARD WORLD FUND | $178.4M | 37.51% |
| [Growth Fund of America](https://search.stillhousedata.com/fund/S000009228) | Growth Fund of America | $155.3M | 4.30% |
| [State Street(R) Real Estate Select Sector SPDR(R) ETF](https://search.stillhousedata.com/fund/S000051152) | SELECT SECTOR SPDR TRUST | $141.6M | 193.78% |
| [Invesco S&P 500 Equal Weight ETF](https://search.stillhousedata.com/fund/S000060812) | Invesco Exchange-Traded Fund Trust | $128.8M | 14.66% |
| [AMCAP Fund](https://search.stillhousedata.com/fund/S000008817) | AMCAP Fund | $125.6M | 12.92% |
| [Touchstone Institutional Funds Trust-Touchstone Sands Capital Institutional Growth Fund](https://search.stillhousedata.com/fund/S000001455) | Touchstone Institutional Funds Trust | $71.6M | 308.24% |
| [Capital Group Growth ETF](https://search.stillhousedata.com/fund/S000074246) | Capital Group Growth ETF | $56.9M | 23.34% |
| [Master Focus Growth LLC](https://search.stillhousedata.com/fund/S000002341) | Master Focus Growth LLC | $47.4M | 253.13% |
| [SA Wellington Capital Appreciation Portfolio](https://search.stillhousedata.com/fund/S000007949) | ANCHOR SERIES TRUST | $30.8M | 153.28% |
| [BARON OPPORTUNITY FUND](https://search.stillhousedata.com/fund/S000000585) | BARON INVESTMENT FUNDS TRUST (f/k/a BARON ASSET FUND) | $17.9M | 110.67% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $15.8M | 7.27% |
| [Washington Mutual Investors Fund](https://search.stillhousedata.com/fund/S000009388) | Washington Mutual Investors Fund | $13.9M | 0.65% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/22160N109.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.