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SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•65 filings

CSGP

COSTAR GROUP, INC.

Net purchases of $2.2M over the last 3 months

1 buyer account for the net balance. There is no cluster of three distinct buyers within 30 days. We found 4 CEO/CFO purchases over 12 months.

How to read this signal

Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.

JSON example

3-month balance

+$2,236,727

1 buyers · 2 sellers

12-month purchases

$8,484,600

4 distinct insiders

12-month sales

$534,282

2 distinct insiders

Highlighted alerts

14

0 Rule 10b5-1 trades treated as informational

Buying cluster · 30 days

Fewer than three distinct buyers

CEO/CFO purchases · 12 months

4 executive purchases found

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Form 4 raw → Raspberry

The value is in what we do not call a signal.

The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.

75
Raw transactions
Everything returned by the filing
14
Voluntary view
P/S trades after deterministic checks
57
Administrative noise
Stored, never alerted
0
10b5-1
Shown as informational
SEC ownership XML facts
Code
F
Shares
756
Price
$32.00
Footnotes
—

No filing footnote was attached to this row.

Raspberry interpretation
Informational — no alert

Reason: administrative_code.

Verify in SEC EDGAR

Recent transactions

Voluntary purchases and sales; administrative noise stays hidden.

14 transactions

Cann Cynthia Cammett

Chief Accounting Officer

SaleAlert
Shares
4,788
Price
$30.78
Value
$147,375
Open SEC filing

Hill John W

Director

SaleAlert
Shares
3,500
Price
$30.21
Value
$105,735
Open SEC filing

FLORANCE ANDREW C

Founder and CEO

PurchaseAlert
Shares
83,300
Price
$29.89
Value
$2,489,837
Open SEC filing

FLORANCE ANDREW C

President and CEO

PurchaseAlert
Shares
3,100
Price
$35.82
Value
$111,042
Open SEC filing

FLORANCE ANDREW C

President and CEO

PurchaseAlert
Shares
68,330
Price
$35.17
Value
$2,403,166
Open SEC filing

Sams Louise S

Director

PurchaseAlert
Shares
1,000
Price
$48.36
Value
$48,360
Open SEC filing

SAINT FREDERICK G.

President, Marketplaces

PurchaseAlert
Shares
20,000
Price
$45.33
Value
$906,600
Open SEC filing

Glaser Rachel C

Director

PurchaseAlert
Shares
1,000
Price
$44.94
Value
$44,940
Open SEC filing

FLORANCE ANDREW C

President and CEO

PurchaseAlert
Shares
55,720
Price
$44.52
Value
$2,480,654
Open SEC filing

Hill John W

Director

SaleAlert
Shares
2,250
Price
$68.68
Value
$154,530
Open SEC filing

Cann Cynthia Cammett

Chief Accounting Officer

SaleAlert
Shares
1,841
Price
$68.79
Value
$126,642
Open SEC filing

SAINT FREDERICK G.

President, Marketplaces

SaleAlert
Shares
25,000
Price
$90.33
Value
$2,258,250
Open SEC filing

SAINT FREDERICK G.

President, Marketplaces

SaleAlert
Shares
25,000
Price
$93.23
Value
$2,330,750
Open SEC filing

Cann Cynthia Cammett

Chief Accounting Officer

SaleAlert
Shares
2,033
Price
$92.85
Value
$188,764
Open SEC filing

“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.