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.

BLACKSTONE MORTGAGE TRUST, INC. (BXMT)

NYSE · SEC CIK 0001061630

$4.81MCovered current disclosed holdings
2Covered reporting owners
2Covered direct positions
2Source 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 6, 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.

2 shown
HolderRolePositionCurrent valueLatest filing
Henry N. NassauResearch disclosed relationshipsDirector218,523 sharesClass A common stock, par value $0.01 per share$2.73MAug 6, 2026
Lynne B. SagalynResearch disclosed relationshipsDirector166,639 sharesClass A common stock, par value $0.01 per share$2.08MJul 16, 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.

7 shown
Effective dateHolderActionSecurityUnitsReported priceReported position after transactionCurrent covered positionFiling
Aug 4, 2026Transaction dateHenry N. NassauResearch disclosed relationshipsPurchaseSEC code PClass A common stock, par value $0.01 per share10,000 shares$14.3357218,523 shares218,523 sharesOwner coverage latest filing Aug 6, 20264Filed Aug 6, 2026
Jul 15, 2026Transaction dateLynne B. SagalynResearch disclosed relationshipsAcquisitionSEC code AClass A common stock, par value $0.01 per share3,939 shares$17.12166,639 shares166,639 sharesOwner coverage latest filing Jul 16, 20264Filed Jul 16, 2026
Jul 15, 2026Transaction dateHenry N. NassauResearch disclosed relationshipsAcquisitionSEC code AClass A common stock, par value $0.01 per share3,044 shares$17.12208,523 shares218,523 sharesOwner coverage latest filing Aug 6, 20264Filed Jul 16, 2026
Apr 15, 2015Transaction dateLynne B. SagalynResearch disclosed relationshipsAcquisitionSEC code AClass A common stock, par value $0.01 per share597 shares$30.4936,414 shares166,639 sharesOwner coverage latest filing Jul 16, 20264Filed Apr 16, 2015
Apr 15, 2015Transaction dateHenry N. NassauResearch disclosed relationshipsAcquisitionSEC code AClass A common stock, par value $0.01 per share397 shares$30.4929,109 shares218,523 sharesOwner coverage latest filing Aug 6, 20264Filed Apr 16, 2015
Mar 31, 2015Transaction dateLynne B. SagalynResearch disclosed relationshipsAcquisitionSEC code AClass A common stock, par value $0.01 per share652 sharesNot reported35,817 shares166,639 sharesOwner coverage latest filing Jul 16, 20264Filed Apr 2, 2015
Mar 31, 2015Transaction dateHenry N. NassauResearch disclosed relationshipsAcquisitionSEC code AClass A common stock, par value $0.01 per share652 sharesNot reported28,712 shares218,523 sharesOwner coverage latest filing Aug 6, 20264Filed Apr 2, 2015

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 7 of 11 source candidates under the current reviewed security-resolution rules. 4 candidates remain excluded because security identity is unresolved.

Covered securities

SecurityInstrument familyCovered positionsCovered value
Class A common stock, par value $0.01 per shareordinary-share2$4.81M

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.

Henry N. Nassau

SEC reporting-owner CIK 0001177127 · 1 published relationship company

SEC owner filings
Evidence dateCompanyObservationSecurity / positionSource
Aug 6, 2026Latest represented filing dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSECurrent covered snapshotDirectorValuation observation Sep 25, 2026Class A common stock, par value $0.01 per share: 218,523 sharesCurrent covered company value: $2.73MPublished current ownership snapshotForms represented: 4Owner filingsIssuer filings
Aug 6, 2026Filed dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSEPurchaseSEC code PEffective Aug 4, 2026 · transaction dateReported units 10,000 shares · reported price 14.3357Class A common stock, par value $0.01 per shareReported position after transaction: 218,523 shares4 filing0001061630-26-000073
Jul 16, 2026Filed dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSEAcquisitionSEC code AEffective Jul 15, 2026 · transaction dateReported units 3,044 shares · reported price 17.12Class A common stock, par value $0.01 per shareReported position after transaction: 208,523 shares4 filing0001061630-26-000059
Apr 16, 2015Filed dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSEAcquisitionSEC code AEffective Apr 15, 2015 · transaction dateReported units 397 shares · reported price 30.49Class A common stock, par value $0.01 per shareReported position after transaction: 29,109 shares4 filing0001209191-15-034697
Apr 2, 2015Filed dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSEAcquisitionSEC code AEffective Mar 31, 2015 · transaction dateReported units 652 shares · reported price not providedClass A common stock, par value $0.01 per shareReported position after transaction: 28,712 shares4 filing0001209191-15-031861

Company-level recent transaction history is published for 1 of 1 relationship companies in this graph; 4 published transaction rows for this exact reporting-owner CIK appear in the chronology.

Lynne B. Sagalyn

SEC reporting-owner CIK 0001195695 · 1 published relationship company

SEC owner filings
Evidence dateCompanyObservationSecurity / positionSource
Jul 16, 2026Latest represented filing dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSECurrent covered snapshotDirectorValuation observation Sep 25, 2026Class A common stock, par value $0.01 per share: 166,639 sharesCurrent covered company value: $2.08MPublished current ownership snapshotForms represented: 4Owner filingsIssuer filings
Jul 16, 2026Filed dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSEAcquisitionSEC code AEffective Jul 15, 2026 · transaction dateReported units 3,939 shares · reported price 17.12Class A common stock, par value $0.01 per shareReported position after transaction: 166,639 shares4 filing0001061630-26-000060
Apr 16, 2015Filed dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSEAcquisitionSEC code AEffective Apr 15, 2015 · transaction dateReported units 597 shares · reported price 30.49Class A common stock, par value $0.01 per shareReported position after transaction: 36,414 shares4 filing0001209191-15-034698
Apr 2, 2015Filed dateBLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSEAcquisitionSEC code AEffective Mar 31, 2015 · transaction dateReported units 652 shares · reported price not providedClass A common stock, par value $0.01 per shareReported position after transaction: 35,817 shares4 filing0001209191-15-031865

Company-level recent transaction history is published for 1 of 1 relationship companies in this graph; 3 published transaction rows for this exact reporting-owner CIK appear in the chronology.

Continue this ownership research

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CompanyReporting-owner contextPublished evidenceContinue research
BLACKSTONE MORTGAGE TRUST, INC. (BXMT)NYSE · Current company9Published chronology observationsLatest represented evidence Aug 6, 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.