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buyStrong cluster of 4

G. Saint Frederick bought $907k of CSGP

President, Marketplaces at COSTAR GROUP, INC.. 20,000 shares at an average of $45.33, traded Mar 2, 2026, filed Mar 3, 2026.

Conviction score
80
Value
$907k
20,000 shares
Holdings after
279,851
+8% from before
From 52-week low
+1%
low $44.63, close $45.17
From 52-week high
-53%
high $96.83, as of Mar 2, 2026

Score components

  • Role
    President
    +20
  • Trade size
    $907k at market
    +24
  • Relative to holdings
    Holdings up 8%
    +3
  • Price context
    1% above the 52-week low; 53% below the 52-week high
    +18
  • Cluster
    4 insiders buying within 14 days
    +15
  • Repeat buying
    First buy in 90 days
    0
  • Track record
    Too few past buys to judge (0 with prices)
    0

What happened after comparable buys

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m -14.6%, 3m -28.0%, 6m -31.6%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

CSGPOct 9, 2026 · close 29.67
Since filing Mar 3, 2026: -36.6%SPY +15.3% · excess -51.8%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001500076-26-000006, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 1, 2026FTax withholding
Common Stock, par value $0.01 per share
-11,096$44.63$495k259,851Mar 3, 2026
Mar 2, 2026POpen-market purchase
Common Stock, par value $0.01 per share
+20,000$45.33$907k279,851Mar 3, 2026

Related signals

Other insiders at COSTAR GROUP, INC. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
38Weak
CSGPsell 2
COSTAR GROUP, INC.
John W Hill
director
$106k
3,500 shares
-13%
39Weak
CSGPsell 2
COSTAR GROUP, INC.
Cynthia Cammett Cann
Chief Accounting Officer
$147k
4,788 shares
-20%
68Notable
CSGPbuy
COSTAR GROUP, INC.
Andrew C Florance
Founder and CEO
$2.5M
83,300 shares
+5%
73Notable
CSGPbuy
COSTAR GROUP, INC.
Andrew C Florance
President and CEO
$2.5M
71,430 shares
+4%
58Moderate
CSGPbuy 4
COSTAR GROUP, INC.
Louise S Sams
director
$48k
1,000 shares
+5%
60Notable
CSGPbuy 4
COSTAR GROUP, INC.
Rachel C Glaser
director
$45k
1,000 shares
+32%
83Strong
CSGPbuy 4
COSTAR GROUP, INC.
Andrew C Florance
President and CEO
$2.5M
55,720 shares
+4%
34Weak
CSGPsell 2
COSTAR GROUP, INC.
Cynthia Cammett Cann
Chief Accounting Officer
$127k
1,841 shares
-7%
39Weak
CSGPsell 2
COSTAR GROUP, INC.
John W Hill
director
$155k
2,250 shares
-11%
45Moderate
CSGPsell
COSTAR GROUP, INC.
G. Saint Frederick
President, Marketplaces
$2.3M
25,000 shares
-8%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

G. Saint Frederick bought $907k of CSGP | InsiderTell