Ownership & Insider Lab

Look up a company to review current SEC-traceable insider positions, exact reporting-owner relationships across other published companies, a dated chronology of the published ownership evidence, and recent supported insider transactions where transaction history is separately available.
Coverage follows the existing reviewed company dataset and fails closed when a ticker is not currently supported.

Tenable Holdings, Inc. (TENB)

Nasdaq · SEC CIK 0001660280

$30.25MCovered current disclosed holdings
4Covered reporting owners
4Covered direct positions
4Source ownership filings

This is the supported SEC-traceable subset, not total insider ownership or personal wealth. Values reflect the current disclosed positions Grizzly Bulls can resolve and value. Latest source filing: Aug 25, 2026 · values through Sep 25, 2026.

Covered reporting owners

Filter the reporting-owner snapshot by holder, role, or security. Position values are shown only where the current reviewed data supports them.

4 shown
HolderRolePositionCurrent valueLatest filing
Stephen A. VintzResearch disclosed relationshipsCo-Chief Executive Officer · Director624,816 sharesCommon Stock, par value $0.01 per share$20.93MAug 25, 2026
Mark C. ThurmondResearch disclosed relationshipsCo-Chief Executive Officer · Director195,289 sharesCommon Stock, par value $0.01 per share$6.54MAug 25, 2026
Barron AnschutzResearch disclosed relationshipsChief Accounting Officer76,077 sharesCommon Stock, par value $0.01 per share$2.55MAug 25, 2026
Linda Kay ZecherResearch disclosed relationshipsDirector7,012 sharesCommon Stock, par value $0.01 per share$234.87KAug 20, 2026

Reporting-owner research graph

These relationships are joined only when the same single SEC reporting-owner CIK appears unambiguously across the publication-authorized company ownership universe. Name similarity is never used to create a relationship.

This graph is bounded to the company ownership relationships currently published by Grizzly Bulls. It is not a complete employment, board, ownership, portfolio, or wealth history, and a missing relationship does not establish that none exists.

SEC transaction evidence ledger

Each row preserves the reviewed SEC transaction evidence, including the effective-date basis, amendment state, reported post-transaction position when present, and a separately published current covered owner/security position when one can be matched uniquely. Reported price is shown when present. The lab does not calculate gross proceeds, reconstruct balances between filings, or treat historical transactions as current wealth.

12 shown
Effective dateHolderActionSecurityUnitsReported priceReported position after transactionCurrent covered positionFiling
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsDispositionSEC code FCommon Stock, par value $0.01 per share2,112 shares$33.94195,289 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsAcquisitionSEC code MCommon Stock, par value $0.01 per share4,368 shares$0197,401 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsDispositionSEC code FCommon Stock, par value $0.01 per share3,754 shares$33.94193,033 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsAcquisitionSEC code MCommon Stock, par value $0.01 per share7,764 shares$0196,787 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsDispositionSEC code FCommon Stock, par value $0.01 per share1,796 shares$33.94189,023 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsAcquisitionSEC code MCommon Stock, par value $0.01 per share3,713 shares$0190,819 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsDispositionSEC code FCommon Stock, par value $0.01 per share2,947 shares$33.94187,106 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsAcquisitionSEC code MCommon Stock, par value $0.01 per share6,095 shares$0190,053 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsDispositionSEC code FCommon Stock, par value $0.01 per share1,097 shares$33.94183,958 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsAcquisitionSEC code MCommon Stock, par value $0.01 per share2,267 shares$0185,055 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsDispositionSEC code FCommon Stock, par value $0.01 per share562 shares$33.94182,788 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026
Aug 24, 2026Transaction dateMark C. ThurmondResearch disclosed relationshipsAcquisitionSEC code MCommon Stock, par value $0.01 per share1,162 shares$0183,350 shares195,289 sharesOwner coverage latest filing Aug 25, 20264Filed Aug 25, 2026

A reported post-transaction position is the balance stated in that historical transaction filing. A current covered position is a separate latest owner/security observation and may reflect later filings or activity. They are shown side by side as evidence points, not as a reconstructed continuous ledger.

Published 12 of 37 source candidates under the current reviewed security-resolution rules.

Covered securities

SecurityInstrument familyCovered positionsCovered value
Common Stock, par value $0.01 per shareordinary-share4$30.25M

Coverage and interpretation

Current holdings: direct positions that the reviewed ownership data can trace to an exact reporting owner, legal security, and current-basis quantity.

Current value: the existing published company-position valuation. This lab does not recalculate security values or infer missing positions.

Transaction evidence: historical flow observations with filing provenance. Reported post-transaction balances and current covered positions are separate evidence points; the lab does not interpolate ownership between them.

Reporting-owner graph: exact reporting-owner CIK relationships across the published company universe. It does not merge people by name or create a complete personal history.

Not included here: a claim of total insider ownership, total personal wealth, institutional 13F ownership, a transaction-value estimate, an insider sentiment score, or an investment recommendation.

Published ownership evidence chronology

This sequence orders only the ownership evidence already published by Grizzly Bulls for the exact reporting-owner relationships above. Transaction rows are ordered by filing date while preserving the separate economic effective date and its basis. Current covered snapshots remain separate latest observations.

The chronology does not interpolate ownership between entries, infer missing activity, pair an amended filing with an assumed parent, infer amendment supersession, or treat a current covered snapshot as proof of continuous ownership.

Barron Anschutz

SEC reporting-owner CIK 0001309403 · 1 published relationship company

SEC owner filings
Evidence dateCompanyObservationSecurity / positionSource
Aug 25, 2026Latest represented filing dateTenable Holdings, Inc. (TENB)NasdaqCurrent covered snapshotChief Accounting OfficerValuation observation Sep 25, 2026Common Stock, par value $0.01 per share: 76,077 sharesCurrent covered company value: $2.55MPublished current ownership snapshotForms represented: 4Owner filingsIssuer filings

Company-level recent transaction history is published for 1 of 1 relationship companies in this graph; 0 published transaction rows for this exact reporting-owner CIK appear in the chronology. 1 relationship company is at the current public transaction-row limit; that does not prove additional rows exist.

Linda Kay Zecher

SEC reporting-owner CIK 0001585799 · 1 published relationship company

SEC owner filings
Evidence dateCompanyObservationSecurity / positionSource
Aug 20, 2026Latest represented filing dateTenable Holdings, Inc. (TENB)NasdaqCurrent covered snapshotDirectorValuation observation Sep 25, 2026Common Stock, par value $0.01 per share: 7,012 sharesCurrent covered company value: $234.87KPublished current ownership snapshotForms represented: 4Owner filingsIssuer filings

Company-level recent transaction history is published for 1 of 1 relationship companies in this graph; 0 published transaction rows for this exact reporting-owner CIK appear in the chronology. 1 relationship company is at the current public transaction-row limit; that does not prove additional rows exist.

Mark C. Thurmond

SEC reporting-owner CIK 0001651579 · 1 published relationship company

SEC owner filings
Evidence dateCompanyObservationSecurity / positionSource
Aug 25, 2026Latest represented filing dateTenable Holdings, Inc. (TENB)NasdaqCurrent covered snapshotCo-Chief Executive Officer · DirectorValuation observation Sep 25, 2026Common Stock, par value $0.01 per share: 195,289 sharesCurrent covered company value: $6.54MPublished current ownership snapshotForms represented: 4Owner filingsIssuer filings
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqAcquisitionSEC code MEffective Aug 24, 2026 · transaction dateReported units 1,162 shares · reported price 0Common Stock, par value $0.01 per shareReported position after transaction: 183,350 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqDispositionSEC code FEffective Aug 24, 2026 · transaction dateReported units 562 shares · reported price 33.94Common Stock, par value $0.01 per shareReported position after transaction: 182,788 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqAcquisitionSEC code MEffective Aug 24, 2026 · transaction dateReported units 4,368 shares · reported price 0Common Stock, par value $0.01 per shareReported position after transaction: 197,401 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqDispositionSEC code FEffective Aug 24, 2026 · transaction dateReported units 2,112 shares · reported price 33.94Common Stock, par value $0.01 per shareReported position after transaction: 195,289 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqAcquisitionSEC code MEffective Aug 24, 2026 · transaction dateReported units 2,267 shares · reported price 0Common Stock, par value $0.01 per shareReported position after transaction: 185,055 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqDispositionSEC code FEffective Aug 24, 2026 · transaction dateReported units 1,097 shares · reported price 33.94Common Stock, par value $0.01 per shareReported position after transaction: 183,958 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqAcquisitionSEC code MEffective Aug 24, 2026 · transaction dateReported units 6,095 shares · reported price 0Common Stock, par value $0.01 per shareReported position after transaction: 190,053 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqDispositionSEC code FEffective Aug 24, 2026 · transaction dateReported units 2,947 shares · reported price 33.94Common Stock, par value $0.01 per shareReported position after transaction: 187,106 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqAcquisitionSEC code MEffective Aug 24, 2026 · transaction dateReported units 3,713 shares · reported price 0Common Stock, par value $0.01 per shareReported position after transaction: 190,819 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqDispositionSEC code FEffective Aug 24, 2026 · transaction dateReported units 1,796 shares · reported price 33.94Common Stock, par value $0.01 per shareReported position after transaction: 189,023 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqAcquisitionSEC code MEffective Aug 24, 2026 · transaction dateReported units 7,764 shares · reported price 0Common Stock, par value $0.01 per shareReported position after transaction: 196,787 shares4 filing0001651579-26-000008
Aug 25, 2026Filed dateTenable Holdings, Inc. (TENB)NasdaqDispositionSEC code FEffective Aug 24, 2026 · transaction dateReported units 3,754 shares · reported price 33.94Common Stock, par value $0.01 per shareReported position after transaction: 193,033 shares4 filing0001651579-26-000008

Company-level recent transaction history is published for 1 of 1 relationship companies in this graph; 12 published transaction rows for this exact reporting-owner CIK appear in the chronology. 1 relationship company is at the current public transaction-row limit; that does not prove additional rows exist.

Stephen A. Vintz

SEC reporting-owner CIK 0001345943 · 1 published relationship company

SEC owner filings
Evidence dateCompanyObservationSecurity / positionSource
Aug 25, 2026Latest represented filing dateTenable Holdings, Inc. (TENB)NasdaqCurrent covered snapshotCo-Chief Executive Officer · DirectorValuation observation Sep 25, 2026Common Stock, par value $0.01 per share: 624,816 sharesCurrent covered company value: $20.93MPublished current ownership snapshotForms represented: 4Owner filingsIssuer filings

Company-level recent transaction history is published for 1 of 1 relationship companies in this graph; 0 published transaction rows for this exact reporting-owner CIK appear in the chronology. 1 relationship company is at the current public transaction-row limit; that does not prove additional rows exist.

Continue this ownership research

These handoffs preserve the exact company identities already represented in the reporting-owner graph. My Stocks keeps a listed company in your existing research lists. Research Inbox is a separate company-change update workflow.

Saving a company to My Stocks never enables updates, and opening Research Inbox never subscribes you automatically. Each update remains an explicit company-level opt-in under the existing Research Inbox consent flow.

CompanyReporting-owner contextPublished evidenceContinue research
Tenable Holdings, Inc. (TENB)Nasdaq · Current company16Published chronology observationsLatest represented evidence Aug 25, 2026

These are company-level continuation paths, not reporting-owner subscriptions. Saving or watching one company does not automatically save or watch the other companies connected to the same reporting owner, and it does not create an owner-level alert.