CASTELLUM INC (CTM) Institutional Ownership Changes & 13F Activity
CASTELLUM INC (CTM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Essex Investment Management Co Llc, Geode Capital Management, Llc, Meridian Wealth Management, Llc, Legato Capital Management Llc, and Goldman Sachs Group Inc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Virtu Financial Llc | Buy | +16,804 | — | 16,804 | $15.00K | Q4 2025 | Feb 23, 2026 |
| Quadrature Capital Ltd | Buy | +217,471 | — | 217,471 | $196.42K | Q4 2025 | Feb 17, 2026 |
| Northern Trust Corp | Buy | +210,611 | — | 210,611 | $190.22K | Q4 2025 | Feb 17, 2026 |
| Susquehanna International Group, Llp | Buy | +102,556 | — | 102,556 | $92.63K | Q4 2025 | Feb 17, 2026 |
| Bridgeway Capital Management, Llc | Buy | +94,794 | — | 94,794 | $85.62K | Q4 2025 | Feb 17, 2026 |
| Two Sigma Investments, Lp | Buy | +75,384 | — | 75,384 | $68.09K | Q4 2025 | Feb 17, 2026 |
| Point72 Asset Management, L.P. | Buy | +34,668 | — | 34,668 | $31.31K | Q4 2025 | Feb 17, 2026 |
| Royal Bank Of Canada | Buy | +22,000 | — | 22,000 | $20.00K | Q4 2025 | Feb 17, 2026 |
| Creative Planning | Buy | +20,000 | — | 20,000 | $18.06K | Q4 2025 | Feb 17, 2026 |
| Jones Financial Companies Lllp | Buy | +6,166 | — | 6,166 | $5.57K | Q4 2025 | Feb 17, 2026 |
| Tower Research Capital Llc (Trc) | Buy | +2,973 | — | 2,973 | $2.69K | Q4 2025 | Feb 17, 2026 |
| Bank Of America Corp | Buy | +866 | — | 866 | $782.00 | Q4 2025 | Feb 17, 2026 |
| Essex Investment Management Co Llc | Buy | +2,114,029 | — | 2,114,029 | $1.91M | Q4 2025 | Feb 13, 2026 |
| Sei Investments Co | Buy | +333,071 | — | 333,071 | $300.83K | Q4 2025 | Feb 13, 2026 |
| State Street Corp | Buy | +303,900 | — | 303,900 | $274.48K | Q4 2025 | Feb 13, 2026 |
| Inspire Advisors, Llc | Buy | +41,700 | — | 41,700 | $37.66K | Q4 2025 | Feb 13, 2026 |
| Pathstone Holdings, Llc | Buy | +31,179 | — | 31,179 | $28.16K | Q4 2025 | Feb 13, 2026 |
| Citigroup Inc | Buy | +26,831 | — | 26,831 | $24.23K | Q4 2025 | Feb 13, 2026 |
| Squarepoint Ops Llc | Buy | +26,781 | — | 26,781 | $24.19K | Q4 2025 | Feb 13, 2026 |
| Centiva Capital, Lp | Buy | +19,409 | — | 19,409 | $17.53K | Q4 2025 | Feb 13, 2026 |
| Jane Street Group, Llc | Buy | +343,842 | — | 343,842 | $310.56K | Q4 2025 | Feb 12, 2026 |
| Blackrock, Inc. | Buy | +265,486 | — | 265,486 | $239.79K | Q4 2025 | Feb 12, 2026 |
| Goldman Sachs Group Inc | Buy | +353,526 | — | 353,526 | $319.31K | Q4 2025 | Feb 10, 2026 |
| Bank Of New York Mellon Corp | Buy | +100,002 | — | 100,002 | $90.32K | Q4 2025 | Feb 10, 2026 |
| Geode Capital Management, Llc | Buy | +773,724 | — | 773,724 | $699.02K | Q4 2025 | Feb 09, 2026 |
| Legato Capital Management Llc | Buy | +680,945 | — | 680,945 | $615.03K | Q4 2025 | Feb 06, 2026 |
| Meridian Wealth Management, Llc | Buy | +745,150 | — | 745,150 | $673.02K | Q4 2025 | Feb 04, 2026 |
| Independent Advisor Alliance | Buy | +12,835 | — | 12,835 | $11.59K | Q4 2025 | Feb 04, 2026 |
| Strengthening Families & Communities, Llc | Buy | +3,000 | — | 3,000 | $2.71K | Q4 2025 | Feb 03, 2026 |
| Pks Advisory Services, Llc | Buy | +18,931 | — | 18,931 | $17.10K | Q4 2025 | Feb 02, 2026 |
Frequently asked questions about CTM activity
Which institutional owners are buying CTM?
Institutional owners buying CTM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in CTM activity?
"Buy" means an investor increased their reported position in CTM compared to the prior reporting period. This reflects growing exposure to CASTELLUM INC (CTM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in CTM increasing?
Institutional interest in CTM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related CTM Institutional Insights
- CTM Overview
- CTM 13F Institutional Holders
- CTM Superinvestors
- Technology Sector Institutional Ownership
- Technology Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Technology Stocks By Institutional Investors
- Most Sold Technology Stocks By Institutional Investors
- CTM Insider Trading & SEC Form 4 Activity
- CTM Articles
- Top Institutional Investor Stock Rankings