Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Core Laboratories Inc. /DE/

CLB · NYSE · CIK 0001958086 · Energy · Oil & Gas Equipment & Services

INSIDER SIGNAL

38.2 / 100

1 buyers · 1 purchase transaction lines · $53.9K gross purchase

WHY THIS SIGNAL?

Buyer breadthLow
Purchase sizeLow
RoleModerate
RecencyLow
ConvictionStrong
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+7.0 / 35
Purchase size+5.5 / 25
Role+13.0 / 20
Recency+2.7 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 1 insider(s), not 4+
  • ⚠ Purchase size is modest relative to the model scale
  • ⚠ Role scores low · most senior buyer: Chairman and CEO (CEO, chair and 10% owners score lowest)
  • ⚠ Purchase activity is becoming less recent

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Tattoli Mark DamianSVP, Gen Counsel & Secretary
○○○○○○
Teo Sow HangCAO & Treasurer
○○○○
Bruno LawrenceChairman and CEO
●
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: Bruno Lawrence · $53.9K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-07-31–2026-07-31

Roles in the peak window: Chairman and CEO. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

38.2 / 100

Latest recorded score

↓ -0.1 ptsversus the previous recorded snapshot
  1. 38.6
  2. 38.5
  3. 38.4
  4. 38.3
  5. 38.2

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

1Purchases
0Sales
28Other Form 4 lines
17SEC filings · 365 days
BUYING1 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER12 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot detected in parsed evidence

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
-19.5%
3M
-11.9%
6M
-38.9%
12M
-16.5%

Volatility & liquidity

Volatility
55.9%
Beta
—
Avg daily value
USD 6.2M

Valuation

Market cap
USD 463.0M
P/E
15.6×

Fundamentals

Profit margin
5.6%
ROE
11.2%
Industry
Oil & Gas Equipment & Services

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, P/E, Profit margin, ROE · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-07-24 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
4,868,011
Previous report
4,382,706
Avg daily volume
714,904
Days to cover
6.8

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-31Bruno LawrencePurchase (P)Common Stock5,000USD 10.78USD 53,900SEC filing ↗

Form 4 evidence

29 transaction lines in the latest 365-day window; 120 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01Teo Sow HangOption exercise / conversion (M)Common Stock250USD 0.00USD 0SEC filing ↗
2026-10-01Teo Sow HangTax withholding (F)Common Stock99USD 9.76USD 966SEC filing ↗
2026-10-01Tattoli Mark DamianOption exercise / conversion (M)Common Stock700USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (27 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01Teo Sow HangOption exercise / conversion (M)Common Stock250USD 0.00USD 0SEC filing ↗
2026-10-01Teo Sow HangTax withholding (F)Common Stock99USD 9.76USD 966SEC filing ↗
2026-10-01Tattoli Mark DamianOption exercise / conversion (M)Common Stock700USD 0.00USD 0SEC filing ↗
2026-10-01Tattoli Mark DamianTax withholding (F)Common Stock276USD 9.76USD 2,694SEC filing ↗
2026-08-01Teo Sow HangOption exercise / conversion (M)Common Stock440USD 0.00USD 0SEC filing ↗
2026-08-01Teo Sow HangTax withholding (F)Common Stock198USD 10.64USD 2,107SEC filing ↗
2026-08-01Tattoli Mark DamianOption exercise / conversion (M)Common Stock250USD 0.00USD 0SEC filing ↗
2026-08-01Tattoli Mark DamianTax withholding (F)Common Stock99USD 10.64USD 1,053SEC filing ↗
2026-07-31Bruno LawrencePurchase (P)Common Stock5,000USD 10.78USD 53,900SEC filing ↗
2026-05-01Tattoli Mark DamianOption exercise / conversion (M)Common Stock250USD 0.00USD 0SEC filing ↗
2026-05-01Tattoli Mark DamianTax withholding (F)Common Stock97USD 14.07USD 1,365SEC filing ↗
2026-04-01Murray KatherineOption exercise / conversion (M)Common Stock8,069USD 0.00USD 0SEC filing ↗
2026-04-01Temeng KwakuOption exercise / conversion (M)Common Stock8,069USD 0.00USD 0SEC filing ↗
2026-04-01MARTINOVICH ROBERT FOption exercise / conversion (M)Common Stock8,069USD 0.00USD 0SEC filing ↗
2026-04-01Klingensmith Harvey RobertOption exercise / conversion (M)Common Stock8,069USD 0.00USD 0SEC filing ↗
2026-04-01Carnes Martha Z.Option exercise / conversion (M)Common Stock8,069USD 0.00USD 0SEC filing ↗
2026-04-01ANASTASIO CURTOption exercise / conversion (M)Common Stock8,069USD 0.00USD 0SEC filing ↗
2025-12-31Tattoli Mark DamianOption exercise / conversion (M)Common Stock24,952USD 0.00USD 0SEC filing ↗
2025-12-31Tattoli Mark DamianTax withholding (F)Common Stock14,310USD 16.03USD 229,389SEC filing ↗
2025-12-31Hill Christopher ScottOption exercise / conversion (M)Common Stock61,417USD 0.00USD 0SEC filing ↗
2025-12-31Hill Christopher ScottTax withholding (F)Common Stock32,152USD 16.03USD 515,397SEC filing ↗
2025-12-31Gresham GwendolynOption exercise / conversion (M)Common Stock24,952USD 0.00USD 0SEC filing ↗
2025-12-31Gresham GwendolynTax withholding (F)Common Stock19,301USD 16.03USD 309,395SEC filing ↗
2025-12-31Bruno LawrenceOption exercise / conversion (M)Common Stock180,722USD 0.00USD 0SEC filing ↗
2025-12-31Bruno LawrenceTax withholding (F)Common Stock112,681USD 16.03USD 1,806,276SEC filing ↗
2025-12-01Teo Sow HangOption exercise / conversion (M)Common Stock864USD 0.00USD 0SEC filing ↗
2025-12-01Teo Sow HangTax withholding (F)Common Stock340USD 15.39USD 5,233SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerCLB
CIK0001958086
SectorEnergy
IndustryOil & Gas Equipment & Services Yahoo Finance
SEC SIC1389 Oil & Gas Field Services, NEC
ExchangeNYSE

Data coverage

Local Form 4 history120 transaction lines from 2022-12-31 to 2026-10-01
1 P purchase lines · 0 S sale lines · 119 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.