Stock profile

COSTAR GROUP INC (CSGP)

CSGP · Latest close $27.25 as of Oct 2, 2026 · 13F data as of Jun 30, 2026 (2026 Q2)
Latest close
$27.25
As of Oct 2, 2026
Tracked funds holding
4 of 83
2026 Q2 13F filings
Opened / added
0 / 2
vs previous quarter
Trimmed / exited
4
vs previous quarter

Super-investor holdings · 2026 Q2

FundPortfolio weightSharesChange vs prev. quarter
Akre Capital Management6.47%11,699,396ADDED (+13.1%)
Polen Capital Management2.14%8,759,314TRIMMED (-30.3%)
Weitz Investment Management0.83%423,181TRIMMED (-18.2%)
Hillman Capital Management0.22%10,745ADDED (+25.6%)

Source: SEC Form 13F filings for the quarter ended Jun 30, 2026. Change labels compare each fund’s 2026 Q2 filing with its previous filing. 13F filings cover long positions only and arrive up to 45 days after quarter-end.

Exited this quarter: Tiger Global Management, ShawSpring Partners.

All institutions · Form 13F

Institutions holding756 of 8,857 filers
Long-only filers among them750
Change vs 2026 Q1-23 net · 688 entered · 711 exited
Shares reported, all filers407,093,227
Reported value, all filers$11.5B

Source: SEC Form 13F data sets — every filer's latest report for the quarter ended Jun 30, 2026, not just the tracked funds above; changes compare with the quarter ended Mar 31, 2026. Share counts and values are summed as reported in the filings (a small number of filers report values in thousands of dollars, so value totals are as-filed sums).

Insider trading · Form 4

1 insiders bought on the open market in the last 90 days (1 purchases, $2.5M), against 2 sales by 2 insiders ($253.1K). Latest buy: Aug 4, 2026.

CEO/CFO bought$1M+ open-market buy

Source: SEC Form 4 filings, as of Oct 3, 2026. Open-market transactions only.

Politician trading · U.S. House

1 House members reported buying (1 purchases vs 1 sales). Bought by Democrats. Latest buy: Aug 19, 2026.

Source: U.S. House Clerk STOCK Act periodic transaction reports, as of Oct 3, 2026. Reported amounts are ranges, and reports can arrive up to 45 days after the trade. Senate reports are not included yet.

Screens & lenses

Insiders

· CEO & CFO Buying — Last 90 days: top executives (CEO/CFO) bought on the open market

· Large Insider Buys — Last 90 days: a single buy trade of $1M or more

Politicians

· Bought by Members — Last 6 months: bought by a U.S. House member

Financial Screens

· Growth — Revenue up every year for 5 straight years

· Graham — Sound finances and a long run of profits

· Earnings Quality (Cash Conversion) — Profits that actually come back as cash

Key figures

· Growth — Latest revenue: $3.2B · 5-yr revenue CAGR: 14.4% · Straight growth years: 9

· Graham — Current ratio: 2.84 · Straight profitable years: 10 · Debt ratio: 0.26 · Latest net income: $7.0M

· Earnings Quality (Cash Conversion) — Cash conversion (3-yr avg): 21.85 · Operating cash flow: $430.0M · Net income: $7.0M

· CEO & CFO Buying — Buy txns: 1 · Buy value: $2.5M · Insiders buying: 1 · Latest buy: Aug 4, 2026

· Large Insider Buys — Buy value: $2.5M · Buy txns: 1 · Insiders buying: 1 · Latest buy: Aug 4, 2026

· Bought by Members — Members buying: 1 · Buy txns: 1 · Sell txns: 1 · Latest buy: Aug 19, 2026

Financial screens are computed from SEC company financial statements; red-flag models are screens, not verdicts — see Methodology.

Signal record

· Insider BEST — appeared in 1 of the last 20 quarterly lists; latest 2026 Q1, ranked #15 of 50.

· Politician BEST — appeared in 1 of the last 20 quarterly lists; latest 2025 Q3, ranked #17 of 50.

13F signal (2021 Q3 – 2026 Q1)EventsWin rateAvg returnSPYExcess
Heavy accumulation — 3+ tracked funds increased together850.0%-4.6%+3.6%-8.2%

Measured from SEC 13F filings: entry at the close on the first trading day after each quarter’s filing deadline, exit one quarter later on the same rule, dividend-adjusted closes. Past records do not guarantee future results — see Track Record and Methodology.

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