Comparable stake leader
Lawrence Bruno
SEC ownership of CORE LABORATORIES N V
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001000229.
Disclosed value leader
—
Comparable rows
0/12
Latest evidence
01 Apr 2023
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Lawrence Bruno
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
01 Apr 2023
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001000229
- Issuer location
- 1181 Le Amstelveen, Netherlands
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of CORE LABORATORIES N V (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
Lawrence Bruno
Disclosed value leader
—
Comparable rows
0/12
Latest evidence
01 Apr 2023
3/4/5
Some rows are evidence-backed but not safely comparable across classes.
12 rows are not safely comparable across share classes.
Showing 1-8 of 12 holder rows.
Quick read
SEC ownership evidence is available, but the rows are not safely comparable across share classes.
0 of 12 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 Lawrence Bruno's linked filing trail.
Detailed SEC evidence table Showing 1-8 of 12 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Lawrence Bruno |
3/4/5
Chairman and CEO, Director
|
—
class O/S missing
|
—
155,126 shares
|
— | 16 Feb 2023 |
| Christopher Scott Hill |
3/4/5
SVP & CFO
|
—
class O/S missing
|
—
52,718 shares
|
— | 16 Feb 2023 |
| Gregory Barry Barnett |
3/4/5
Director
|
—
class O/S missing
|
—
33,907 shares
|
— | 01 Apr 2022 |
| Martha Z. Carnes |
3/4/5
Director
|
—
class O/S missing
|
—
30,592 shares
|
— | 01 Apr 2023 |
| Harvey Robert Klingensmith |
3/4/5
Director
|
—
class O/S missing
|
—
26,226 shares
|
— | 01 Apr 2023 |
| Eeuwijk Monique van Dijken |
3/4/5
Director
|
—
mixed-class rows
|
—
22,603 shares
mixed-class rows
|
— | 01 Apr 2023 |
| Gwendolyn Gresham |
3/4/5
SVP
|
—
class O/S missing
|
—
21,418 shares
|
— | 16 Feb 2023 |
| Mark D. Tattoli |
3/4/5
SVP, Gen Counsel & Secretary
|
—
class O/S missing
|
—
21,418 shares
|
— | 16 Feb 2023 |
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 11 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 1-12 of 12 reporting-owner rows connected to CORE LABORATORIES N V. Open a relationship link for the CIK-to-CIK filing trail.
Rows
12
Largest Forms 3/4/5 holder
Kwaku Temeng
Net 12M change
$0
Latest report
01 Apr 2023
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Kwaku Temeng | Director | Mixed | 01 Apr 2023 | |||
| Kevin Daniels | CAO & Treasurer | Mixed | 16 Feb 2023 | |||
| Martha Z. Carnes | Director | Mixed | 01 Apr 2023 | |||
| Gwendolyn Gresham | Svp | Mixed | 16 Feb 2023 | |||
| Lawrence Bruno | Chairman and CEO, Director | Mixed | 16 Feb 2023 | |||
| Harvey Robert Klingensmith | Director | Mixed | 01 Apr 2023 | |||
| Gregory Barry Barnett | Director | Mixed | 01 Apr 2022 | |||
| Michael Straughen | Director | Mixed | 01 Apr 2023 | |||
| Eeuwijk Monique van Dijken | Director | Mixed | 01 Apr 2023 | |||
| Katherine Murray | Director | Mixed | 01 Apr 2023 | |||
| Mark D. Tattoli | SVP, Gen Counsel & Secretary | Mixed | 16 Feb 2023 | |||
| Christopher Scott Hill | Svp & Cfo | Mixed | 16 Feb 2023 |
Recent insider transactions for CORE LABORATORIES N V
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.