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.

Post Holdings, Inc. (POST)

NYSE · SEC CIK 0001530950

$317.26MCovered 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: Sep 3, 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
William P. StiritzResearch disclosed relationshipsChairman Emeritus4,334,667 sharesCommon Stock, $0.01 par value per share$317.12MSep 3, 2026
Jeff A. ZadoksResearch disclosed relationshipsDirector1,800 sharesCommon Stock, $0.01 par value per share$131.69KAug 27, 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.

4 shown
Effective dateHolderActionSecurityUnitsReported priceReported position after transactionCurrent covered positionFiling
Aug 25, 2026Transaction dateJeff A. ZadoksResearch disclosed relationshipsDispositionSEC code GCommon Stock, $0.01 par value per share26,215 shares$01,800 shares1,800 sharesOwner coverage latest filing Aug 27, 20264Filed Aug 27, 2026
Jul 2, 2026Transaction dateJeff A. ZadoksResearch disclosed relationshipsDispositionSEC code FCommon Stock, $0.01 par value per share3,551 shares$90.9428,015 shares1,800 sharesOwner coverage latest filing Aug 27, 20264Filed Jul 7, 2026
Jul 2, 2026Transaction dateJeff A. ZadoksResearch disclosed relationshipsDispositionSEC code FCommon Stock, $0.01 par value per share3,867 shares$90.9431,566 shares1,800 sharesOwner coverage latest filing Aug 27, 20264Filed Jul 7, 2026
Jul 2, 2026Transaction dateJeff A. ZadoksResearch disclosed relationshipsDispositionSEC code FCommon Stock, $0.01 par value per share2,544 shares$90.9435,433 shares1,800 sharesOwner coverage latest filing Aug 27, 20264Filed Jul 7, 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 4 of 4 source candidates under the current reviewed security-resolution rules.

Covered securities

SecurityInstrument familyCovered positionsCovered value
Common Stock, $0.01 par value per shareordinary-share2$317.26M

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.

Jeff A. Zadoks

SEC reporting-owner CIK 0001343352 · 1 published relationship company

SEC owner filings
Evidence dateCompanyObservationSecurity / positionSource
Aug 27, 2026Latest represented filing datePost Holdings, Inc. (POST)NYSECurrent covered snapshotDirectorValuation observation Sep 25, 2026Common Stock, $0.01 par value per share: 1,800 sharesCurrent covered company value: $131.69KPublished current ownership snapshotForms represented: 4Owner filingsIssuer filings
Aug 27, 2026Filed datePost Holdings, Inc. (POST)NYSEDispositionSEC code GEffective Aug 25, 2026 · transaction dateReported units 26,215 shares · reported price 0Common Stock, $0.01 par value per shareReported position after transaction: 1,800 shares4 filing0001343352-26-000021
Jul 7, 2026Filed datePost Holdings, Inc. (POST)NYSEDispositionSEC code FEffective Jul 2, 2026 · transaction dateReported units 2,544 shares · reported price 90.94Common Stock, $0.01 par value per shareReported position after transaction: 35,433 shares4 filing0001343352-26-000017
Jul 7, 2026Filed datePost Holdings, Inc. (POST)NYSEDispositionSEC code FEffective Jul 2, 2026 · transaction dateReported units 3,867 shares · reported price 90.94Common Stock, $0.01 par value per shareReported position after transaction: 31,566 shares4 filing0001343352-26-000017
Jul 7, 2026Filed datePost Holdings, Inc. (POST)NYSEDispositionSEC code FEffective Jul 2, 2026 · transaction dateReported units 3,551 shares · reported price 90.94Common Stock, $0.01 par value per shareReported position after transaction: 28,015 shares4 filing0001343352-26-000017

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.

William P. Stiritz

SEC reporting-owner CIK 0001052058 · 1 published relationship company

SEC owner filings
Evidence dateCompanyObservationSecurity / positionSource
Sep 3, 2026Latest represented filing datePost Holdings, Inc. (POST)NYSECurrent covered snapshotChairman EmeritusValuation observation Sep 25, 2026Common Stock, $0.01 par value per share: 4,334,667 sharesCurrent covered company value: $317.12MPublished 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.

Continue this ownership research

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CompanyReporting-owner contextPublished evidenceContinue research
Post Holdings, Inc. (POST)NYSE · Current company6Published chronology observationsLatest represented evidence Sep 3, 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.