CTMNYSEServices-Management Consulting ServicesFiscal year ends December 31
Castellum, Inc.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 6, 2026
$0.57−0.01 (-2.04%)
Close on Oct 19, 2026
- Market cap
- $53.70M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
8.3%
8M of 95M shares
Institutional holders
35
12 new, 4 sold out
Net institutional buying
0M
In Q2 2026
Insider trades, 12 months
10 buys · 14 sales
Net sold $723.81K
Shares held by institutions
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of CTM | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 3,093,768 | 3.26% | $2.23M | +12,511 | 0.00% |
| Meridian Wealth Management, LLC | 863,200 | 0.91% | $621.42K | +77,400 | 0.02% |
| Geode Capital Management, LLC | 816,037 | 0.86% | $587.64K | −128,862 | 0.00% |
| Captrust Financial Advisors | 626,100 | 0.66% | $450.73K | – | 0.00% |
| Vanguard Fiduciary Trust Co | 492,717 | 0.52% | $354.76K | +74,393 | 0.00% |
| State Street Corp | 303,900 | 0.32% | $218.78K | – | 0.00% |
| BlackRock, Inc. | 265,486 | 0.28% | $191.12K | – | 0.00% |
| Savvy Advisors, Inc. | 220,300 | 0.23% | $158.59K | −1,500 | 0.00% |
| UBS Group AG | 208,958 | 0.22% | $150.45K | +55,429 | 0.00% |
| Northern Trust Corp | 171,420 | 0.18% | $123.41K | −10,482 | 0.00% |
| Virtu Financial LLC | 168,401 | 0.18% | $121 | New | 0.00% |
| Jane Street Group, LLC | 129,071 | 0.14% | $92.92K | −107,703 | 0.00% |
| Bridgeway Capital Management, LLC | 94,794 | 0.10% | $68.24K | – | 0.00% |
| TCG Advisory Services, LLC | 57,414 | 0.06% | $41.33K | New | 0.00% |
| Creative Planning | 50,000 | 0.05% | $36.00K | +29,680 | 0.00% |
| Almanack Investment Partners, LLC. | 50,000 | 0.05% | $36.00K | – | 0.00% |
| Two Sigma Securities, LLC | 40,530 | 0.04% | $29.18K | +25,308 | 0.00% |
| Arq Wealth Advisors, LLC | 35,000 | 0.04% | $22.75K | New | 0.00% |
| Pathstone Holdings, LLC | 31,179 | 0.03% | $22.45K | – | 0.00% |
| Vanguard Global Advisers, LLC | 27,344 | 0.03% | $19.69K | – | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 35 | 8M | 8.3% | 12 / 6 | 4 / 4 | 1M | 0M |
| Q1 2026 | 27 | 8M | 8.2% | 8 / 4 | 5 / 19 | 4M | 6M |
| Q4 2025 | 40 | 13M | 13.7% | 8 / 12 | 11 / 8 | 5M | 1M |
| Q3 2025 | 42 | 9M | 9.0% | 14 / 16 | 4 / 5 | 2M | 0M |
| Q2 2025 | 33 | 7M | 7.3% | 14 / 8 | 2 / 6 | 4M | 0M |
| Q1 2025 | 25 | 3M | 3.5% | 11 / 6 | 5 / 6 | 1M | 3M |
| Q4 2024 | 20 | 5M | 5.0% | 7 / 2 | 4 / 3 | 3M | 0M |
| Q3 2024 | 17 | 2M | 1.6% | 2 / 4 | 4 / 5 | 0M | 4M |
| Q2 2024 | 21 | 5M | 5.5% | 4 / 6 | 5 / 4 | 1M | 2M |
| Q1 2024 | 21 | 6M | 6.5% | 3 / 7 | 3 / 2 | 5M | 1M |
| Q4 2023 | 20 | 2M | 1.9% | 5 / 5 | 2 / 2 | 1M | 0M |
| Q3 2023 | 17 | 1M | 1.2% | 4 / 4 | 3 / 4 | 0M | 0M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of CTM | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 2,189,871 | 2.31% | $1.58M | 0.00% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 818,269 | 0.86% | $589.07K | 0.00% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 446,779 | 0.47% | $378.82K | 0.00% | May 31, 2026 |
| Fidelity Total Market Index Fund | 132,463 | 0.14% | $112.32K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund | 115,890 | 0.12% | $98.26K | 0.00% | May 31, 2026 |
| Ultra-Small Company Market Fund | 94,794 | 0.10% | $68.24K | 0.05% | Jun 30, 2026 |
| Vanguard Institutional Total Stock Market Index Fund | 48,544 | 0.05% | $34.95K | 0.00% | Jun 30, 2026 |
| Vanguard Balanced Index Fund | 37,084 | 0.04% | $26.70K | 0.00% | Jun 30, 2026 |
| Blackstone Alternative Multi-Strategy Fund | -27,800 | -0.03% | -$20.01K | -0.00% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Jay O. Wright | General Counsel, Secretary, Director | 25,329,559 | 26.72% | Dec 22, 2025 |
| Andrew Merriman | Chief Operating Officer | 588,531 | 0.62% | Sep 9, 2026 |
| Tammy L. Martin | General Counsel and Secretary | 15,031 | 0.02% | Jul 2, 2026 |
| David T. Bell | Chief Financial Officer | 17,255 | 0.02% | Jul 2, 2026 |
| Glen R. Ives | President | 200,878 | 0.21% | Jul 2, 2026 |
| Charles Thomas McMillen | Director | 231,015 | 0.24% | Mar 27, 2026 |
| John Francis Campbell | Director | 126,537 | 0.13% | Nov 13, 2025 |
| Mark S. Alarie | Director | 112,920 | 0.12% | Nov 13, 2025 |
| Bernard S. Champoux | Director | 104,536 | 0.11% | Nov 13, 2025 |
| Mark C. Fuller | – | 14,977,112 | 15.80% | Sep 3, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Andrew Merriman Chief Operating Officer | Sep 9, 2026 | Buy | +10,000 | $0.62 | $6.20K | 588,531 |
| Andrew Merriman Chief Operating Officer | Sep 9, 2026 | Buy | +40,000 | $0.62 | $24.80K | 578,531 |
| Andrew Merriman Chief Operating Officer | Jul 1, 2026 | Buy | +1,202 | $0.61 | $733 | 538,531 |
| Glen R. Ives President | Jul 1, 2026 | Buy | +1,262 | $0.61 | $770 | 200,878 |
| David T. Bell Chief Financial Officer | Jul 1, 2026 | Buy | +1,202 | $0.61 | $733 | 17,255 |
| Tammy L. Martin General Counsel and Secretary | Jul 1, 2026 | Buy | +1,202 | $0.61 | $733 | 15,031 |
| Tammy L. Martin General Counsel and Secretary | Mar 31, 2026 | Award | +1,329 | $0.45 | $598 | 13,829 |
| David T. Bell Chief Financial Officer | Mar 31, 2026 | Award | +1,329 | $0.45 | $598 | 16,053 |
| Andrew Merriman Chief Operating Officer | Mar 31, 2026 | Award | +1,329 | $0.45 | $598 | 537,329 |
| Andrew Merriman Chief Operating Officer | Mar 27, 2026 | Buy | +2,000 | $0.64 | $1.28K | 536,000 |
| Glen R. Ives President | Mar 27, 2026 | Buy | +2,000 | $0.62 | $1.24K | 199,616 |
| Glen R. Ives President | Mar 26, 2026 | Buy | +10,000 | $0.66 | $6.60K | 197,616 |
| Charles Thomas McMillen Director | Mar 25, 2026 | Sale | −30,000 | $0.70 | $21.00K | 231,015 |
| Charles Thomas McMillen Director | Mar 18, 2026 | Sale | −55,000 | $0.80 | $44.00K | 261,015 |
| Andrew Merriman Chief Operating Officer | Mar 18, 2026 | Buy | +3,000 | $0.80 | $2.40K | 534,000 |
| Jay O. Wright General Counsel, Secretary, Director | Dec 19, 2025 | Sale | −30,000 | $1.05 | $31.50K | 7,134,973 |
| Jay O. Wright General Counsel, Secretary, Director | Dec 16, 2025 | Sale | −12,000 | $1.07 | $12.84K | 7,164,973 |
| Jay O. Wright General Counsel, Secretary, Director | Dec 15, 2025 | Sale | −6,000 | $1.10 | $6.60K | 7,176,973 |
| Jay O. Wright General Counsel, Secretary, Director | Dec 12, 2025 | Sale | −11,000 | $1.16 | $12.76K | 7,182,973 |
| Jay O. Wright General Counsel, Secretary, Director | Dec 11, 2025 | Sale | −50,000 | $1.16 | $58.00K | 7,193,973 |
| Jay O. Wright General Counsel, Secretary, Director | Dec 10, 2025 | Sale | −127,000 | $1.21 | $153.67K | 7,243,973 |
| Jay O. Wright General Counsel, Secretary, Director | Dec 1, 2025 | Sale | −35,000 | $1.05 | $36.75K | 7,370,973 |
| Jay O. Wright General Counsel, Secretary, Director | Nov 28, 2025 | Sale | −18,000 | $1.06 | $19.08K | 7,405,973 |
| Jay O. Wright General Counsel, Secretary, Director | Nov 17, 2025 | Sale | −10,000 | $1.16 | $11.60K | 7,423,973 |
| Jay O. Wright General Counsel, Secretary, Director | Nov 14, 2025 | Sale | −90,000 | $1.15 | $103.50K | 7,433,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Nov 13, 2025 | Sale | −160,000 | $1.17 | $187.20K | 7,523,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Nov 11, 2025 | Sale | −60,000 | $1.18 | $70.80K | 7,683,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 16, 2025 | Sale | −50,000 | $1.11 | $55.50K | 7,743,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 15, 2025 | Sale | −50,000 | $1.10 | $55.00K | 7,793,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 12, 2025 | Sale | −73,000 | $1.12 | $81.76K | 7,843,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 11, 2025 | Sale | −90,000 | $1.12 | $100.80K | 7,916,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 10, 2025 | Sale | −70,000 | $1.12 | $78.40K | 8,006,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 9, 2025 | Sale | −150,000 | $1.12 | $168.00K | 8,076,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 8, 2025 | Sale | −250,227 | $1.12 | $280.25K | 8,226,973 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 5, 2025 | Sale | −46,473 | $1.08 | $50.19K | 8,477,200 |
| Mark C. Fuller – | Sep 3, 2025 | Sale | −500,000 | $1.12 | $560.00K | 6,113,659 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 28, 2025 | Sale | −24,000 | $1.05 | $25.20K | 8,523,673 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 27, 2025 | Sale | −40,000 | $1.04 | $41.60K | 8,547,673 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 26, 2025 | Sale | −40,000 | $1.04 | $41.60K | 8,587,673 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 22, 2025 | Sale | −45,000 | $1.04 | $46.80K | 8,627,673 |
| Charles Thomas McMillen Director | Aug 21, 2025 | Option exercise | +125,000 | $0.21 | $26.25K | 316,015 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 19, 2025 | Sale | −126,000 | $1.05 | $132.30K | 8,672,673 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 18, 2025 | Sale | −225,000 | $1.08 | $243.00K | 8,798,673 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | May 19, 2025 | Other | −240,600 | $1.04 | $250.22K | 9,283,073 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | May 19, 2025 | Sale | −259,400 | $1.07 | $277.56K | 9,023,673 |
| Mark C. Fuller Director, 10% owner | May 19, 2025 | Sale | −500,000 | $1.05 | $525.00K | 6,613,659 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Mar 6, 2025 | Sale | −135,000 | $1.34 | $180.90K | 9,523,673 |
| Mark C. Fuller Director, 10% owner | Mar 6, 2025 | Sale | −225,000 | $1.33 | $299.25K | 7,113,659 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Mar 5, 2025 | Sale | −365,000 | $1.47 | $536.55K | 9,658,673 |
| Mark C. Fuller Director, 10% owner | Mar 5, 2025 | Other | −50,000 | – | – | 7,613,659 |
| Mark C. Fuller Director, 10% owner | Mar 5, 2025 | Sale | −275,000 | $1.49 | $409.75K | 7,338,659 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Jan 31, 2025 | Other | +101 | – | – | 10,023,673 |
| Charles Thomas McMillen Director | Jan 2, 2025 | Option exercise | +100,028 | $0.21 | $21.01K | 191,015 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Dec 31, 2024 | Other | −2,800 | – | – | 10,023,572 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Dec 31, 2024 | Gift | −100,000 | – | – | 10,026,372 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 4, 2024 | Buy | +272,300 | $0.16 | $43.57K | 10,126,372 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Sep 3, 2024 | Buy | +44,400 | $0.17 | $7.55K | 9,854,072 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 29, 2024 | Buy | +61,597 | $0.16 | $9.86K | 9,809,672 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 28, 2024 | Buy | +97,903 | $0.16 | $15.66K | 9,748,075 |
| Jay O. Wright General Counsel, Secretary, Director, 10% owner | Aug 14, 2024 | Buy | +115,240 | $0.14 | $16.13K | 9,650,172 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Charles Thomas McMillen Director | Mar 17, 2026 | 110,028 | $83 | Mar 17, 2026 | Stock Option Exercise |
| Jay O. Wright Director, 10% Stockholder | Nov 10, 2025 | 800,000 | $1.02M | Nov 11, 2025 | Merger/Consolidation |
| Mark C. Fuller 10% Stockholder | Aug 18, 2025 | 500,000 | $640.00K | Aug 18, 2025 | Private Placement |
| Jay O. Wright Officer, Director, 10% Stockholder | Aug 18, 2025 | 500,000 | $640.00K | Aug 18, 2025 | Purchase |
| Mark C. Fuller Officer | May 19, 2025 | 500,000 | $560.00K | May 19, 2025 | Private Placement |
| Mark C. Fuller Director, 10% Stockholder | Mar 4, 2025 | 500,000 | $490.50K | Mar 5, 2025 | Private Placement |
| Jay O. Wright Officer, Director, 10% Stockholder | Mar 4, 2025 | 500,000 | $490.50K | Mar 5, 2025 | Warrant Exercise |