Comparable stake leader
ARIEL INVESTMENTS, LLC
SEC ownership of Core Laboratories Inc. /DE/
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001958086.
Disclosed value leader
ARIEL INVESTMENTS, LLC
Comparable rows
50/50
Latest evidence
01 Apr 2026
- Public ticker
- CLB on NYSE
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
ARIEL INVESTMENTS, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
ARIEL INVESTMENTS, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
01 Apr 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001958086
- Issuer location
- Houston, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Core Laboratories Inc. /DE/ (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
ARIEL INVESTMENTS, LLC
Disclosed value leader
ARIEL INVESTMENTS, LLC
Comparable rows
50/50
Latest evidence
01 Apr 2026
13F
13D/G
3/4/5
Lead comparable stake: 29%
13D/G row: ARIEL INVESTMENTS, LLC
Showing 1-8 of 50 holder rows.
Quick read
ARIEL INVESTMENTS, LLC leads the comparable SEC ownership view at 29%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens ARIEL INVESTMENTS, LLC's linked filing trail.
Comparable ownership
Top 5
ARIEL INVESTMENTS, LLC
29%
BlackRock, Inc.
16%
DISCIPLINED GROWTH INVESTORS INC /MN
11%
EARNEST PARTNERS LLC
6.9%
Martha Z. Carnes
0.12%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| ARIEL INVESTMENTS, LLC |
13F
13D/G
Company
|
29%
from 13D/G
|
$221,130,814
13,170,388 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
16%
from 13D/G
|
$121,030,761
7,208,503 shares
|
— | 31 Mar 2026 |
| DISCIPLINED GROWTH INVESTORS INC /MN |
13F
13D/G
Company
|
11%
from 13D/G
|
$82,894,161
4,937,115 shares
|
— | 31 Mar 2026 |
| EARNEST PARTNERS LLC |
13D/G
13F
Company
|
6.9%
|
$60,813,292
3,221,043 shares
|
$0 | 31 Dec 2025 |
| Martha Z. Carnes |
3/4/5
Director
|
0.12%
|
$913,320
54,397 shares
|
— | 01 Apr 2026 |
| Harvey Robert Klingensmith |
3/4/5
Director
|
0.11%
|
$840,015
50,031 shares
|
— | 01 Apr 2026 |
| Kwaku Temeng |
3/4/5
Director
|
0.07%
|
$564,090
33,597 shares
|
— | 01 Apr 2026 |
| Katherine Murray |
3/4/5
Director
|
0.06%
|
$491,776
29,290 shares
|
— | 01 Apr 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 03 Jul 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to Core Laboratories Inc. /DE/. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
Lawrence Bruno
Net 12M change
$0
Latest report
01 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Lawrence Bruno | Chairman and CEO, Director | $6,295,724 | Mixed | 12 Feb 2026 | ||
| Martha Z. Carnes | Director | $913,320 | Median | 01 Apr 2026 | ||
| Gwendolyn Gresham | Svp | $893,484 | Mixed | 12 Feb 2026 | ||
| Harvey Robert Klingensmith | Director | $840,015 | Median | 01 Apr 2026 | ||
| Kwaku Temeng | Director | $564,090 | Median | 01 Apr 2026 | ||
| Mark D. Tattoli | SVP, Gen Counsel & Secretary | $492,373 | Median | 01 May 2026 | ||
| Katherine Murray | Director | $491,776 | Median | 01 Apr 2026 | ||
| Michael Straughen | Director | $437,206 | Mixed | 01 Apr 2025 | ||
| Curt Anastasio | Director | $399,683 | Median | 01 Apr 2026 | ||
| Kevin Daniels | CAO & Treasurer | $231,611 | Mixed | 15 Feb 2024 | ||
| Robert F. Martinovich | Director | $135,477 | Median | 01 Apr 2026 | ||
| Sow Hang Teo | CAO & Treasurer | $134,021 | Mixed | 12 Feb 2026 | ||
| Christopher Scott Hill | Svp & Cfo | $1,113 | Mixed | 12 Feb 2026 |
Recent insider transactions for Core Laboratories Inc. /DE/
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Mark D. Tattoli | CLB | Common Stock | Options Exercise | 0.91% | 250 | 27,611 | 01 May 2026 | Direct | ||
| Mark D. Tattoli | CLB | Common Stock | Tax liability | -0.35% | -97 | 27,514 | 01 May 2026 | Direct | ||
| Mark D. Tattoli | CLB | Restricted Shares | Options Exercise | -17.2% | -250 | 1,200 | 01 May 2026 | Direct | ||
| Katherine Murray | CLB | Common Stock | Options Exercise | 38% | 8,069 | 29,290 | 01 Apr 2026 | Direct | ||
| Katherine Murray | CLB | Restricted Shares | Options Exercise | -100% | -8,069 | 0 | 01 Apr 2026 | Direct | ||
| Katherine Murray | CLB | Restricted Shares | Award | 7,895 | 7,895 | 01 Apr 2026 | Direct | |||
| Curt Anastasio | CLB | Common Stock | Options Exercise | 51.3% | 8,069 | 23,805 | 01 Apr 2026 | Direct | ||
| Curt Anastasio | CLB | Restricted Shares | Options Exercise | -100% | -8,069 | 0 | 01 Apr 2026 | Direct | ||
| Curt Anastasio | CLB | Restricted Shares | Award | 7,895 | 7,895 | 01 Apr 2026 | Direct | |||
| Harvey Robert Klingensmith | CLB | Common Stock | Options Exercise | 19.2% | 8,069 | 50,031 | 01 Apr 2026 | Direct | ||
| Harvey Robert Klingensmith | CLB | Restricted Shares | Options Exercise | -100% | -8,069 | 0 | 01 Apr 2026 | Direct | ||
| Harvey Robert Klingensmith | CLB | Restricted Shares | Award | 7,895 | 7,895 | 01 Apr 2026 | Direct | |||
| Kwaku Temeng | CLB | Common Stock | Options Exercise | 31.6% | 8,069 | 33,597 | 01 Apr 2026 | Direct | ||
| Kwaku Temeng | CLB | Restricted Shares | Options Exercise | -100% | -8,069 | 0 | 01 Apr 2026 | Direct | ||
| Kwaku Temeng | CLB | Restricted Shares | Award | 7,895 | 7,895 | 01 Apr 2026 | Direct | |||
| Robert F. Martinovich | CLB | Common Stock | Options Exercise | 8,069 | 8,069 | 01 Apr 2026 | Direct | |||
| Robert F. Martinovich | CLB | Restricted Shares | Options Exercise | -100% | -8,069 | 0 | 01 Apr 2026 | Direct | ||
| Robert F. Martinovich | CLB | Restricted Shares | Award | 7,895 | 7,895 | 01 Apr 2026 | Direct | |||
| Martha Z. Carnes | CLB | Common Stock | Options Exercise | 17.4% | 8,069 | 54,397 | 01 Apr 2026 | Direct | ||
| Martha Z. Carnes | CLB | Restricted Shares | Options Exercise | -100% | -8,069 | 0 | 01 Apr 2026 | Direct | ||
| Martha Z. Carnes | CLB | Restricted Shares | Award | 7,895 | 7,895 | 01 Apr 2026 | Direct | |||
| Mark D. Tattoli | CLB | Performance Shares | Award | 33,490 | 33,490 | 12 Feb 2026 | Direct | |||
| Gwendolyn Gresham | CLB | Performance Shares | Award | 33,490 | 33,490 | 12 Feb 2026 | Direct | |||
| Christopher Scott Hill | CLB | Performance Shares | Award | 70,008 | 70,008 | 12 Feb 2026 | Direct | |||
| Lawrence Bruno | CLB | Performance Shares | Award | 204,340 | 204,340 | 12 Feb 2026 | Direct | |||
| Sow Hang Teo | CLB | Performance Shares | Award | 7,526 | 7,526 | 12 Feb 2026 | Direct | |||
| Mark D. Tattoli | CLB | Common Stock | Options Exercise | 149.2% | 24,952 | 41,671 | 31 Dec 2025 | Direct | ||
| Mark D. Tattoli | CLB | Common Stock | Tax liability | -34.3% | -14,310 | 27,361 | 31 Dec 2025 | Direct | ||
| Mark D. Tattoli | CLB | Performance Shares | Options Exercise | -100% | -24,952 | 0 | 31 Dec 2025 | Direct | ||
| Gwendolyn Gresham | CLB | Common Stock | Options Exercise | 90.5% | 24,952 | 52,527 | 31 Dec 2025 | Direct | ||
| Gwendolyn Gresham | CLB | Common Stock | Tax liability | -36.7% | -19,301 | 33,226 | 31 Dec 2025 | Direct | ||
| Gwendolyn Gresham | CLB | Performance Shares | Options Exercise | -100% | -24,952 | 0 | 31 Dec 2025 | Direct | ||
| Christopher Scott Hill | CLB | Common Stock | Options Exercise | 75.9% | 61,417 | 142,354 | 31 Dec 2025 | Direct | ||
| Christopher Scott Hill | CLB | Common Stock | Tax liability | -22.6% | -32,152 | 110,202 | 31 Dec 2025 | Direct | ||
| Christopher Scott Hill | CLB | Performance Shares | Options Exercise | -100% | -61,417 | 0 | 31 Dec 2025 | Direct | ||
| Lawrence Bruno | CLB | Common Stock | Options Exercise | 95.4% | 180,722 | 370,119 | 31 Dec 2025 | Direct | ||
| Lawrence Bruno | CLB | Common Stock | Tax liability | -30.4% | -112,681 | 257,438 | 31 Dec 2025 | Direct | ||
| Lawrence Bruno | CLB | Performance Shares | Options Exercise | -100% | -180,722 | 0 | 31 Dec 2025 | Direct | ||
| Sow Hang Teo | CLB | Common Stock | Options Exercise | 10.9% | 864 | 8,765 | 01 Dec 2025 | Direct | ||
| Sow Hang Teo | CLB | Common Stock | Tax liability | -3.88% | -340 | 8,425 | 01 Dec 2025 | Direct | ||
| Sow Hang Teo | CLB | Restricted Shares | Options Exercise | -11.4% | -864 | 6,690 | 01 Dec 2025 | Direct | ||
| Mark D. Tattoli | CLB | Common Stock | Options Exercise | 4.3% | 700 | 16,995 | 01 Oct 2025 | Direct | ||
| Mark D. Tattoli | CLB | Common Stock | Tax liability | -1.62% | -276 | 16,719 | 01 Oct 2025 | Direct | ||
| Mark D. Tattoli | CLB | Restricted Shares | Options Exercise | -32.6% | -700 | 1,450 | 01 Oct 2025 | Direct | ||
| Sow Hang Teo | CLB | Common Stock | Options Exercise | 3.23% | 250 | 8,000 | 01 Oct 2025 | Direct | ||
| Sow Hang Teo | CLB | Common Stock | Tax liability | -1.24% | -99 | 7,901 | 01 Oct 2025 | Direct | ||
| Sow Hang Teo | CLB | Restricted Shares | Options Exercise | -3.2% | -250 | 7,554 | 01 Oct 2025 | Direct | ||
| Mark D. Tattoli | CLB | Common Stock | Options Exercise | 1.55% | 250 | 16,394 | 01 Aug 2025 | Direct | ||
| Mark D. Tattoli | CLB | Common Stock | Tax liability | -0.6% | -99 | 16,295 | 01 Aug 2025 | Direct | ||
| Mark D. Tattoli | CLB | Restricted Shares | Options Exercise | -10.4% | -250 | 2,150 | 01 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.