Costar Group, Inc. 13F holders
764 funds reported a position in Costar Group, Inc. in their 13F for the quarter ended 30 June 2026, together 414.1 million shares worth $11.74 billion. Against the quarter before, 92 opened a position, 304 added, 267 trimmed and 142 sold out; together they sold a net 8.0 million shares. The largest holders: Vanguard Portfolio Management LLC, BlackRock, Inc. and Vanguard Capital Management LLC.
Funds holding764-37 on Q1 2026
Shares they held414.1Mworth $11.74 billion
Net sold on the quarter8.0M sharesabout $226.0 million at the funds' values
Funds buying to selling396 to 409opened or added, to cut or sold
Opened 92Added 304Held 95Trimmed 267Sold out 142
What each fund did in CSGP against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in CSGP in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
4,696 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 306 reported a position in Costar Group, Inc.: 32 opened one, 93 added, 122 trimmed and 64 sold out, a net 8.0 million shares sold.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 1 reported a position in Costar Group, Inc. in a 13F for the quarter ended 30 September 2026, and 9 more in a 13F for an earlier quarter, the latest each has filed. The largest: Baillie Gifford, 13.2 million shares worth $372.5 million, 0.3% of its reported book (its 13F for the quarter ended 30 June 2026). Sold out: Tiger Global Management. In the quarter, 0 funds added or opened a position and 1 trimmed or sold out; together they sold a net 1.1 million shares, about $31.1 million at the funds' own value per share on 30 September 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Baillie Gifford | 13,154,165 | $372.5 million | 0.3% | -456,757 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Akre Capital Management | 11,699,396 | $331.3 million | 6.5% | +1,351,123 | added | 30 June 2026, an earlier quarter | 13F |
| Geode Capital Management | 11,030,513 | $301.7 million | 0.0% | -1,135,956 | trimmed | 30 September 2026 | 13F |
| Norges Bank | 5,949,912 | $168.5 million | 0.0% | held | 30 June 2026, an earlier quarter | 13F | |
| Capital Research Global Investors | 4,193,733 | $118.8 million | 0.0% | -179,973 | trimmed | 30 June 2026, an earlier quarter | 13F |
| FMR LLC | 2,474,902 | $70.1 million | 0.0% | -356,622 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Two Sigma Investments | 1,104,950 | $31.3 million | 0.0% | +801,946 | added | 30 June 2026, an earlier quarter | 13F |
| Millennium Management | 746,995 | $21.2 million | 0.0% | +623,405 | added | 30 June 2026, an earlier quarter | 13F |
| Citadel Advisors | 741,898 | $21.0 million | 0.0% | -346,306 | trimmed | 30 June 2026, an earlier quarter | 13F |
| Point72 Asset Management | 130,616 | $3.7 million | 0.0% | +130,616 | new | 30 June 2026, an earlier quarter | 13F |
| Tiger Global Management | 0 | $0 | 0.0% | -1,500,000 | exited | 30 June 2026, an earlier quarter | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| Vanguard Portfolio Management LLC | 37,914,844 | 9.16% | $1.07 billion | 0.05% | -319,289 | 13F |
| BlackRock, Inc. | 33,813,969 | 8.17% | $957.6 million | 0.01% | +5,785 | 13F |
| Vanguard Capital Management LLC | 26,683,792 | 6.44% | $755.7 million | 0.02% | -740,111 | 13F |
| Bamco Inc. | 21,626,763 | 5.22% | $612.5 million | 0.92% | +5,312,588 | 13F |
| State Street Corp. | 18,410,876 | 4.45% | $521.4 million | 0.01% | -240,099 | 13F |
| Capital International Investors | 16,643,016 | 4.02% | $471.3 million | 0.10% | +1,129,263 | 13F |
| Baillie Gifford & Co. | 13,154,165 | 3.18% | $372.5 million | 0.34% | -456,757 | 13F |
| Geode Capital Management, LLC | 12,166,469 | 2.94% | $343.3 million | 0.02% | -282,183 | 13F |
| Akre Capital Management LLC | 11,699,396 | 2.83% | $331.3 million | 6.49% | +1,351,123 | 13F |
| Polen Capital Management LLC | 8,759,314 | 2.12% | $248.1 million | 2.14% | -3,811,054 | 13F |
| AQR Capital Management LLC | 8,445,474 | 2.04% | $239.2 million | 0.08% | +7,182,770 | 13F |
| Jupiter Topco LLC | 7,832,860 | 1.89% | $221.8 million | 0.09% | first 13F | 13F |
| Invesco Ltd. | 6,808,377 | 1.64% | $192.8 million | 0.01% | -9,139,148 | 13F |
| EdgePoint Investment Group Inc. | 5,950,002 | 1.44% | $168.5 million | 1.27% | new | 13F |
| Norges Bank | 5,949,912 | 1.44% | $168.5 million | 0.02% | 13F | |
| Morgan Stanley | 5,485,870 | 1.32% | $155.4 million | 0.01% | +73,255 | 13F |
| Meritage Group LP | 5,394,164 | 1.30% | $152.8 million | 5.89% | +2,065,158 | 13F |
| JPMorgan Chase & Co. | 4,939,994 | 1.19% | $145.4 million | 0.01% | +3,090,449 | 13F |
| Goldman Sachs Group Inc. | 5,129,484 | 1.24% | $145.3 million | 0.01% | -4,116,328 | 13F |
| Federated Hermes, Inc. | 4,426,727 | 1.07% | $125.4 million | 0.18% | +3,128,769 | 13F |
| Capital Research Global Investors | 4,193,733 | 1.01% | $118.8 million | 0.02% | -179,973 | 13F |
| Principal Financial Group Inc. | 3,790,794 | 0.92% | $107.4 million | 0.05% | -13,905,398 | 13F |
| Northern Trust Corp. | 3,448,839 | 0.83% | $97.7 million | 0.01% | +16,608 | 13F |
| Qube Research & Technologies Ltd | 3,218,369 | 0.78% | $91.1 million | 0.10% | new | 13F |
| BNP Paribas Asset Management Holding S.A. | 3,136,727 | 0.76% | $88.9 million | 0.09% | +461,226 | 13F |
| Amundi | 3,135,933 | 0.76% | $88.8 million | 0.02% | -144,791 | 13F |
| Van Eck Associates Corp. | 3,078,903 | 0.74% | $87.2 million | 0.05% | -399,823 | 13F |
| Massachusetts Financial Services Co. | 2,983,969 | 0.72% | $84.5 million | 0.03% | +2,027,873 | 13F |
| Charles Schwab Investment Management Inc. | 2,962,442 | 0.72% | $83.9 million | 0.01% | +88,180 | 13F |
| Bank of America Corp. | 2,735,102 | 0.66% | $77.5 million | 0.01% | -833,005 | 13F |
| Spyglass Capital Management LLC | 2,694,697 | 0.65% | $76.3 million | 4.13% | +1,583,473 | 13F |
| UBS AM, a distinct business unit of UBS Asset Management Americas LLC | 2,521,571 | 0.61% | $71.4 million | 0.01% | +95,878 | 13F |
| Canada Pension Plan Investment Board | 2,481,641 | 0.60% | $70.3 million | 0.04% | +470,678 | 13F |
| FMR LLC | 2,474,902 | 0.60% | $70.1 million | 0.00% | -356,622 | 13F |
| Nomura Asset Management International Inc. | 2,403,003 | 0.58% | $68.1 million | 0.10% | +69,238 | 13F |
| Ensign Peak Advisors, Inc | 2,373,407 | 0.57% | $67.2 million | 0.11% | -360,882 | 13F |
| UBS Group AG | 2,328,376 | 0.56% | $65.9 million | 0.01% | +1,002,348 | 13F |
| Vanguard Fiduciary Trust Co. | 2,297,974 | 0.55% | $65.1 million | 0.01% | -93,087 | 13F |
| Deutsche Bank AG | 2,264,379 | 0.55% | $64.1 million | 0.02% | +364,877 | 13F |
| Bank of Montreal | 2,209,141 | 0.53% | $62.6 million | 0.02% | -278,574 | 13F |
| Jane Street Group, LLC | 2,162,322 | 0.52% | $61.2 million | 0.04% | +1,074,875 | 13F |
| Beck Mack & Oliver LLC | 2,084,233 | 0.50% | $59.0 million | 1.15% | -842,742 | 13F |
| Bank of New York Mellon Corp | 2,005,395 | 0.48% | $56.8 million | 0.01% | -395,285 | 13F |
| Erste Asset Management GmbH | 1,700,000 | 0.41% | $49.8 million | 0.39% | +1,250,000 | 13F |
| Thompson Siegel & Walmsley LLC | 1,744,040 | 0.42% | $49.4 million | 0.89% | +1,128,789 | 13F |
| Legal & General Group Plc | 1,682,774 | 0.41% | $47.7 million | 0.01% | -1,342,734 | 13F |
| BNP Paribas Financial Markets | 1,578,322 | 0.38% | $44.7 million | 0.02% | +809,606 | 13F |
| HSBC Holdings PLC | 1,570,774 | 0.38% | $44.5 million | 0.02% | +223,868 | 13F |
| Fiera Capital Corp | 1,566,845 | 0.38% | $44.4 million | 0.16% | +1,085,134 | 13F |
| Voloridge Investment Management, LLC | 1,543,483 | 0.37% | $43.7 million | 0.19% | +213,525 | 13F |
The 50 largest of the 764 funds that reported a position in CSGP in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on CSGP
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Calls | 291,600 | $8.3 million | 30 June 2026 | 13F |
| Citadel Advisors | Puts | 204,400 | $5.8 million | 30 June 2026 | 13F |
| Millennium Management | Calls | 107,300 | $3.0 million | 30 June 2026 | 13F |
| Two Sigma Investments | Calls | 50,500 | $1.4 million | 30 June 2026 | 13F |
| Two Sigma Investments | Puts | 44,700 | $1.3 million | 30 June 2026 | 13F |
| Point72 Asset Management | Puts | 20,300 | $574,896 | 30 June 2026 | 13F |
| Millennium Management | Puts | 16,300 | $461,616 | 30 June 2026 | 13F |
| Point72 Asset Management | Calls | 400 | $11,328 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 14 August 2026 | 13G | Bamco Inc and 7 others | 21.6 million | 5.3% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Portfolio Management and 1 other | 38.3 million | 9.1% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Capital Management and 1 other | 31.6 million | 7.5% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 31 August 2026 | 62,865 | $32.22 | SEC |
| 26 August 2026 | 5,560 | $32.81 | SEC |
| 19 August 2026 | 1 | $31.38 | SEC |
| 11 August 2026 | 4,200 | $31.48 | SEC |
| 3 August 2026 | 81 | $28.76 | SEC |
| 28 July 2026 | 400 | $29.17 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.