Ticker · CUSIP 21867A105

CLB

CORE LABORATORIES INC

Energy·Oil & Gas Equipment & Services

···Share

Holders (tracked)

Combined shares

14,937,339

Combined value

$239.45M

Last close

$16.50

Quarter

2025Q4

Price is +2.9% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$16.50+3.92 (+31.13%)H $19.66 · L $9.73 · Avg Vol 481K

Position opened

Tracked holders · last 8 quarters

-4 vs previous quarter over the last 8.

SEC event timeline

20 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−144,514 shares · 2025Q4
Position
Two Sigma Investments exited2026-02-17
−30,551 shares · 2025Q4
Position
D.E. Shaw & Co. trimmed2026-02-17
−11,496 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−178,992 shares · 2025Q4
Position
Steve Cohen (Point72) exited2026-02-17
−71,735 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+5,578 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+12,242 shares · 2025Q4
Position
John Rogers (Ariel Investments) trimmed2026-02-13
−112,568 shares · 2025Q4
Position
Renaissance Technologies added2026-02-12
+149,219 shares · 2025Q4
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09
−49,600 shares · 2025Q4
Position
Two Sigma Investments added2025-11-14
+5,160 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−128,692 shares · 2025Q3
Position
AQR Capital Management opened position2025-11-14
+37,576 shares · 2025Q3
Position
Steve Cohen (Point72) added2025-11-14
+9,435 shares · 2025Q3
Position
D.E. Shaw & Co. added2025-11-14
+148,642 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+1,305 shares · 2025Q3
Position
John Rogers (Ariel Investments) added2025-11-14
+797,105 shares · 2025Q3
Position
Renaissance Technologies opened position2025-11-13
+34,181 shares · 2025Q3
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12
−43,147 shares · 2025Q3
Position
Norges Bank (Norway SWF) trimmed2025-11-12
−65,654 shares · 2024Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for CLB →

Follow-the-investor returns

If you'd copied each holder of CLB…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Ken Griffin (Citadel Advisors)	2023Q2	$12.31	+34.0%	$609K
Izzy Englander (Millennium Mgmt)	2023Q3	$12.41	+33.0%	$238K
AQR Capital Management	2025Q3	$13.26	+24.4%	$822K
D.E. Shaw & Co.	2023Q2	$14.26	+15.7%	$2.8M
Renaissance Technologies	2024Q1	$16.06	+2.8%	$3.0M
John Rogers (Ariel Investments)	2023Q2	$19.22	-14.1%	$225.4M
T. Rowe Price	2023Q2	$19.76	-16.5%	$807K
Ken Fisher (Fisher Asset Mgmt)	2023Q2	$21.15	-22.0%	$12.8M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions0

—

Added to3

Renaissance Technologies
+149,219
$2.4M
AQR Capital Management
+12,242
$196K
T. Rowe Price
+5,578
$90

Trimmed5

Izzy Englander (Millennium Mgmt)
−178,992
$2.9M
Ken Griffin (Citadel Advisors)
−144,514
$2.3M
John Rogers (Ariel Investments)
−112,568
$1.8M
Ken Fisher (Fisher Asset Mgmt)
−49,600
$795K
D.E. Shaw & Co.
−11,496
$184K

Exited2

Steve Cohen (Point72)
−71,735
$887K
Two Sigma Investments
−30,551
$378K

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2023Q2	9	18,341,604	$426.4M	—
2023Q3	10	18,261,187	$438.5M	+1
2023Q4	9	18,576,382	$328.1M	-1
2024Q1	11	20,565,710	$351.3M	+2
2024Q2	10	19,523,021	$396.1M	-1
2024Q3	11	11,650,781	$215.9M	+1
2024Q4	11	11,083,393	$191.9M	—
2025Q1	9	11,688,384	$175.2M	-2
2025Q2	10	14,546,613	$167.6M	+1
2025Q3	12	15,407,956	$190.4M	+2
2025Q4	8	14,937,339	$239.4M	-4

Who owns CLB

8 super-investors · 2025Q4

Tracked stake

14.94M

Combined value

$239M

% of shares outstanding

—

shares-out unknown

Quarter action mix

Added3Trim5

#	Manager	Shares	Value	% of book	Last action
1	John Rogers Ariel Investments	13.66M	$219M	2.4%	Trim−112.6K
2	Ken Fisher Fisher Asset Mgmt	775.0K	$12M	0.0%	Trim−49.6K
3	Renaissance Technologies	183.4K	$3M	0.0%	Added+149.2K
4	D.E. Shaw & Co.	167.9K	$3M	0.0%	Trim−11.5K
5	AQR Capital Management	49.8K	$799K	0.0%	Added+12.2K
6	T. Rowe Price	48.9K	$785K	0.0%	Added+5.6K
7	Ken Griffin Citadel Advisors	36.9K	$592K	0.0%	Trim−144.5K
8	Izzy Englander Millennium Mgmt	14.4K	$231K	0.0%	Trim−179.0K

Recent moves

20 transactions

TRIMKen Griffin (Citadel Advisors)
−144,514 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−178,992 · 2025Q4
ADDT. Rowe Price
+5,578 · 2025Q4
SOLDTwo Sigma Investments
−30,551 · 2025Q4
ADDAQR Capital Management
+12,242 · 2025Q4
SOLDSteve Cohen (Point72)
−71,735 · 2025Q4
TRIMD.E. Shaw & Co.
−11,496 · 2025Q4
TRIMJohn Rogers (Ariel Investments)
−112,568 · 2025Q4
ADDRenaissance Technologies
+149,219 · 2025Q4
TRIMKen Fisher (Fisher Asset Mgmt)
−49,600 · 2025Q4
ADDD.E. Shaw & Co.
+148,642 · 2025Q3
ADDTwo Sigma Investments
+5,160 · 2025Q3
ADDSteve Cohen (Point72)
+9,435 · 2025Q3
ADDT. Rowe Price
+1,305 · 2025Q3
TRIMIzzy Englander (Millennium Mgmt)
−128,692 · 2025Q3
ADDJohn Rogers (Ariel Investments)
+797,105 · 2025Q3
NEWAQR Capital Management
+37,576 · 2025Q3
NEWRenaissance Technologies
+34,181 · 2025Q3
TRIMKen Fisher (Fisher Asset Mgmt)
−43,147 · 2025Q3
TRIMNorges Bank (Norway SWF)
−65,654 · 2024Q3

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