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Public ownership evidence

Castellum, Inc. (CTM) Ownership Disclosures

Read CTM insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-10-012026-10-01MARTIN TAMMY LP1,396Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-01 and its public availability date is 2026-10-01. Subtracting those calendar dates gives 0 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code P: a purchase. A purchase code is only one eligibility check. Confirm reporting-owner role, amendment lineage and coverage before treating it as a strategy input.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001877939-26-000087 ↗SEC 0001877939-26-000086 ↗SEC 0001877939-26-000085 ↗

Recent Form 4 activity

Show the table · 6 rows, 6 columns

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2026-10-012026-10-01MARTIN TAMMY LP1,396Not reported
2026-10-012026-10-01Bell David TP1,396Not reported
2026-10-012026-10-01Merriman AndrewP1,396Not reported
2026-10-012026-10-01Ives Glen RP1,700Not reported
2026-09-092026-09-09Merriman AndrewP10,000Not reported
2026-09-092026-09-09Merriman AndrewP40,000Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 22 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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XTX Topco Ltd2026-06-302026-08-1521,910$15,773None
OSAIC HOLDINGS, INC.2026-06-302026-08-15215$154None
JANE STREET GROUP, LLC2026-06-302026-08-154,022$2,895None
JANE STREET GROUP, LLC2026-06-302026-08-15125,049$90,023None
JONES FINANCIAL COMPANIES LLLP2026-06-302026-08-156,366$4,520None
BRIDGEWAY CAPITAL MANAGEMENT, LLC2026-06-302026-08-1594,794$68,242None
TWO SIGMA SECURITIES, LLC2026-06-302026-08-1540,530$29,178None
VANGUARD CAPITAL MANAGEMENT LLC2026-06-302026-08-143,093,768$2,227,513None
Pathstone Holdings, LLC2026-06-302026-08-1431,179$22,446None
Vanguard Global Advisers, LLC2026-06-302026-08-1427,344$19,688None
Inscription Capital, LLC2026-06-302026-08-1412,500$8,999None
UBS Group AG2026-06-302026-08-1419,503$14,042None
UBS Group AG2026-06-302026-08-14189,455$136,408None
Creative Planning2026-06-302026-08-1450,000$35,995None
Virtu Financial LLC2026-06-302026-08-14168,401$121,000None
CAPTRUST FINANCIAL ADVISORS2026-06-302026-08-14626,100$450,729None
VANGUARD FIDUCIARY TRUST CO2026-06-302026-08-14492,717$354,756None
NORTHERN TRUST CORP2026-06-302026-08-14171,420$123,405None
GEODE CAPITAL MANAGEMENT, LLC2026-06-302026-08-13163,630$117,797None
GEODE CAPITAL MANAGEMENT, LLC2026-06-302026-08-13652,407$469,840None
HARBOUR INVESTMENTS, INC.2026-06-302026-08-13150$108None
Tower Research Capital LLC (TRC)2026-06-302026-08-125,872$4,227None

90-day public filing window, up to 50 source positions.

XTX Topco Ltd ↗OSAIC HOLDINGS, INC. ↗JANE STREET GROUP, LLC ↗JANE STREET GROUP, LLC ↗JONES FINANCIAL COMPANIES LLLP ↗BRIDGEWAY CAPITAL MANAGEMENT, LLC ↗TWO SIGMA SECURITIES, LLC ↗VANGUARD CAPITAL MANAGEMENT LLC ↗Pathstone Holdings, LLC ↗Vanguard Global Advisers, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.