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CSGP in the 13F filings

Costar Group Inc · CUSIP 22160N109

Sector · Business and payment services
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
36
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 12 listed it in both
Shares listed
82,367,312
combined, among listed positions
Reported value
$2.3bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 26 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -3,423,730.

Managers listing CSGP in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

36 of 36 holders

ActionFiling
Baillie Gifford & Co13,154,165$373m0.34%Trimmed-456,7576 Aug 2026 (the filing on sec.gov)
Akre Capital Management LLC11,699,396$331m6.47%Added+1,351,12314 Aug 2026 (the filing on sec.gov)
Polen Capital Management LLC8,759,314$248m2.14%Trimmed-3,811,0544 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC8,445,474$239m0.08%Added+7,182,77014 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd7,832,860$222m0.09%Added+108,70814 Aug 2026 (the filing on sec.gov)
Invesco Ltd6,808,377$193munder 0.1%Trimmed-9,139,14814 Aug 2026 (the filing on sec.gov)
Capital Research Global Investors4,193,733$119munder 0.1%Trimmed-179,97312 Aug 2026 (the filing on sec.gov)
MFS Investment Management2,983,969$85munder 0.1%Added+2,027,8733 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)2,474,902$70munder 0.1%Trimmed-356,62213 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC2,162,322$61munder 0.1%Added+1,074,87514 Aug 2026 (the filing on sec.gov)
Voloridge Investment Management LLC1,543,483$44m0.19%Added+213,52514 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC1,442,049$41munder 0.1%Added+659,44214 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP1,381,204$39munder 0.1%Added+863,94413 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP1,299,558$37munder 0.1%Added+1,258,64713 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP1,104,950$31munder 0.1%Added+801,94614 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,043,332$30munder 0.1%Trimmed-4,866,29114 Aug 2026 (the filing on sec.gov)
Man Group PLC921,094$26munder 0.1%Added+856,36514 Aug 2026 (the filing on sec.gov)
Millennium Management LLC746,995$21munder 0.1%Added+623,40514 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC741,898$21munder 0.1%Trimmed-346,3062 Sep 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc686,023$19munder 0.1%Trimmed-831,77214 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP458,488$18munder 0.1%Added+50,98014 Aug 2026 (the filing on sec.gov)
Tudor Investment Corp627,490$18munder 0.1%Added+448,20714 Aug 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP458,765$13m0.08%Added+434,28214 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP405,498$11munder 0.1%Added+151,16914 Aug 2026 (the filing on sec.gov)
Holocene Advisors LP216,209$6.1munder 0.1%Added+123,22114 Aug 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (3)

Exited (2)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
13 in Q3 2024 to 15 in Q2 2026

Tracked managers listing it, at least.

01020302014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
CSGP by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20136$486mn.a.n.a.
Q3 20136$610mn.a.n.a.
Q4 20137$827mn.a.n.a.
Q1 201411$885mn.a.n.a.
Q2 20148$740mn.a.n.a.
Q3 20147$618mn.a.n.a.
Q4 20148$815mn.a.n.a.
Q1 20159$1.2bnn.a.n.a.
Q2 20158$1.2bnn.a.n.a.
Q3 20157$1.1bnn.a.n.a.
Q4 20158$1.3bnn.a.n.a.
Q1 201610$1.1bnn.a.n.a.
Q2 20169$1.1bnn.a.n.a.
Q3 201610$1.1bnn.a.n.a.
Q4 20169$827mn.a.n.a.
Q1 20178$1.1bnn.a.n.a.
Q2 201713$2.3bnn.a.n.a.
Q3 201715$2.8bnn.a.n.a.
Q4 201716$3.2bnn.a.n.a.
Q1 201814$3.7bnn.a.n.a.
Q2 201813$3.9bnn.a.n.a.
Q3 201819$4.0bnn.a.n.a.
Q4 201816$2.8bnn.a.n.a.
Q1 201918$3.7bnn.a.n.a.
Q2 201917$4.3bnn.a.n.a.
Q3 201926$4.9bnn.a.n.a.
Q4 201919$5.0bnn.a.n.a.
Q1 202020$5.4bnn.a.n.a.
Q2 202018$7.4bnn.a.n.a.
Q3 202020$8.8bnn.a.n.a.
Q4 202021$9.3bnn.a.n.a.
Q1 202119$8.6bnn.a.n.a.
Q2 202121$8.4bnn.a.n.a.
Q3 202115$8.4bnn.a.n.a.
Q4 202119$6.9bnn.a.n.a.
Q1 202218$5.0bnn.a.n.a.
Q2 202223$5.0bnn.a.n.a.
Q3 202220$5.0bnn.a.n.a.
Q4 202222$5.3bnn.a.n.a.
Q1 202319$4.3bnn.a.n.a.
Q2 202315$5.5bnn.a.n.a.
Q3 202316$4.6bnn.a.n.a.
Q4 202313$5.1bn67
Q1 202413$5.7bn66
Q2 202415$4.1bn123
Q3 202413$3.8bn84
Q4 202415$3.3bn105
Q1 202516$3.8bn114
Q2 202516$4.5bn97
Q3 202514$4.8bn69
Q4 202513$4.5bn2014
Q1 202614$3.0bn2318
Q2 202615$1.8bn2612

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

CSGP and V →CSGP and MA →CSGP and MCO →Choose a stock to compare with CSGP →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own CSGP, latest filings →Back to the 13F Explorer →