COSTAR GROUP INC

$CSGP
Smart money positioned

17 of the Top-200 alpha managers hold $CSGP as of the latest 13F snapshot.

13F holders
787
Insider buys · 90d
0
Congress · 90d
1trades

Smart Money · top-200 alpha cohort

17 holders · Q1 2026

$CSGP is held by 17 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 0.79%, with an average of 0.15% of portfolio. Largest holder: Platinum Investment Management Ltd. at 0.79%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.

Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.

Institutional holders

Top 10 of 787 · Source: 13F-HR
01
Hall Capital Management Co. Inc.
0.38% of portfolio
68,058,456 sh
02
Janus Henderson Group PLC
0.32% of portfolio
36,585,140 sh
03
Litman Gregory Wealth Management LLC
0.15% of portfolio
31,027,506 sh
04
Cobblestone Capital Advisors LLC
3.61% of portfolio
25,140,736 sh
05
Axa S.a.
0.03% of portfolio
18,650,975 sh
06
State Street
0.04% of portfolio
18,632,352 sh
07
Thompson Davis & Co. Inc.
1.99% of portfolio
16,314,175 sh
08
Parthenon LLC
0.56% of portfolio
13,543,100 sh
09
Penn Davis Mcfarland Inc.
6.80% of portfolio
10,348,273 sh
10
Thomas H Lee Partners LP
0.16% of portfolio
7,724,152 sh
See all 787 13F holders · Pro →

Insider activity · last 90 days

10 transactions · 4 filers
06 Mar 2026
Sams Louise S
▲ BOUGHT
1,000
$48.36
P
13 Nov 2025
Hill John W
▼ SOLD
2,250
$68.68
S
13 Nov 2025
Cann Cynthia Cammett
▼ SOLD
1,841
$68.79
S
28 Aug 2025
Saint Frederick G.
▼ SOLD
25,000
$90.33
S
28 Jul 2025
Saint Frederick G.
▼ SOLD
25,000
$93.23
S
28 Jul 2025
Cann Cynthia Cammett
▼ SOLD
2,033
$92.85
S
11 Jun 2025
Saint Frederick G.
▼ SOLD
25,000
$81.10
S
10 Mar 2025
Cann Cynthia Cammett
▼ SOLD
1,749
$79.90
S
11 Nov 2024
Cann Cynthia Cammett
▼ SOLD
1,310
$76.85
S
31 Jul 2024
Cann Cynthia Cammett
▼ SOLD
1,200
$78.20
S

Transaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.

Congress trades · last 90 days

28 disclosures · STOCK Act
House · Michigan · Traded Mar 13
BOUGHT
$1K–$15K
Apr 6STOCK
House · California · Traded Jan 28
BOUGHT
$1K–$15K
Feb 13STOCK
House · Michigan · Traded Jan 28
BOUGHT
$1K–$15K
Feb 11STOCK
House · California · Traded Dec 10
BOUGHT
$1K–$15K
Jan 12STOCK
House · Michigan · Traded Dec 10
BOUGHT
$1K–$15K
Jan 9STOCK
House · California · Traded Nov 10
SOLD
$1K–$15K
Dec 8STOCK
House · California · Traded Nov 3
SOLD
$1K–$15K
Dec 8STOCK
House · California · Traded Oct 15
BOUGHT
$1K–$15K
Nov 18STOCK
House · Michigan · Traded Sep 25
SOLD
$1K–$15K
Oct 22STOCK
House · California · Traded Sep 22
BOUGHT
$1K–$15K
Oct 10STOCK
See full $CSGP Congress history →

Source data: SEC EDGAR · 13F-HR · Form 4 · U.S. House Clerk PTR (disclosures-clerk.house.gov) · Senate eFD (senate.gov) · Last refreshed 07:31 UTC.