13F

Stock

Castellum, Inc.

CTM · held by 40 managers

Reported value

$11.7M

Holders

40

+0 new · −1 exited

Holders’ est. mark

−$127

Price effect on 1 books still in the name

Largest holder

$3.14M

Vanguard

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
Vanguard3.47M$3.14MHeld
UBS Group AG2.16M$1.95MHeld
ESSEX INVESTMENT MANAGEMENT CO LLC2.11M$1.91MHeld
GEODE CAPITAL MANAGEMENT, LLC773.7K$699KHeld
Meridian Wealth Management, LLC745.1K$673KHeld
Legato Capital Management LLC680.9K$615KHeld
GOLDMAN SACHS GROUP INC353.5K$319.3KHeld
JANE STREET GROUP, LLC343.8K$310.6KHeld
SEI INVESTMENTS CO333.1K$300.8KHeld
State Street303.9K$274.5KHeld
BlackRock, Inc.265.5K$239.8KHeld
Savvy Advisors, Inc.221.8K$200.3KHeld
Quadrature Capital Ltd217.5K$196.4KHeld
NORTHERN TRUST CORP210.6K$190.2KHeld
SUSQUEHANNA INTERNATIONAL GROUP, LLP102.6K$92.6KHeld
Bank of New York Mellon Corp100K$90.3KHeld
BRIDGEWAY CAPITAL MANAGEMENT, LLC94.8K$85.6KHeld
TWO SIGMA INVESTMENTS, LP75.4K$68.1KHeld
Almanack Investment Partners, LLC.50K$45.2KHeld
Inspire Advisors, LLC41.7K$37.7KHeld
Point72 Asset Management, L.P.34.7K$31.3KHeld
Pathstone Holdings, LLC31.2K$28.2KHeld
KESTRA PRIVATE WEALTH SERVICES, LLC27.3K$24.6KHeld
CITIGROUP INC26.8K$24.2KHeld
Squarepoint Ops LLC26.8K$24.2KHeld
ROYAL BANK OF CANADA22K$20KHeld
Creative Planning20K$18.1KHeld
Centiva Capital, LP19.4K$17.5KHeld
PKS Advisory Services, LLC18.9K$17.1KHeld
Global Retirement Partners, LLC16.4K$14.8KHeld
Blue Trust, Inc.14.7K$13.3KHeld
Revisor Wealth Management LLC12.9K$12.3KHeld
Independent Advisor Alliance12.8K$11.6KHeld
Inscription Capital, LLC12.5K$11.3KHeld
Welch Group, LLC10K$9.03KHeld
JONES FINANCIAL COMPANIES LLLP6.17K$5.57KHeld
Strengthening Families & Communities, LLC3K$2.71KHeld
Tower Research Capital LLC (TRC)2.97K$2.69KHeld
BANK OF AMERICA CORP /DE/866$782−$127Added$38
Virtu Financial LLC16.8K$15Held

Who left

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.