Castellum, Inc. (CTM) stock intrinsic value fair value estimate & owner earnings analysis

Castellum sells cybersecurity, intelligence, electronic-warfare and IT engineering services, almost entirely to the U.S. federal government (Army, Navy, Marine Corps, Special Operations and civilian agencies). It is a people business: revenue was $52.9 million in 2025 (up 18%), with a 36.6% gross margin, down from 40.8% in 2024. Contract backlog is large on paper ($258 million including unexercised options) but only $12.3 million is funded, and management expects about 18% of it (roughly $46 million) to convert to revenue in the next 12 months, less than the current revenue run rate. Revenue therefore depends on new task orders and recompetes. How we measure earnings. We start from operating cash flow, strip out swings in receivables and payables, and then subtract stock compensation as a real cost. That last step matters a great deal here. Stock compensation was $8.8 million in 2022, $7.5 million in 2023, $5.4 million in 2024 and $2.5 million in 2025. On that basis owner earnings were about -$9.1 million (2022), -$8.8 million (2023), -$6.0 million (2024) and -$1.7 million (2025). Non-cash charges (the $6.9 million goodwill write-down in 2023 and about $1.4 million a year of amortization of acquired intangibles) are added back as sunk acquisition costs, not ongoing costs; because we credit no growth, we are not treating those intangibles as permanent. Interest is added back because we value the business first and then subtract debt; this no longer matters much because the company has no debt. What changed. The loss narrowed from $17.8 million (2023) to $2.4 million (2025), and stock compensation and overhead fell sharply. In 2025 the company raised equity (two public offerings and warrant exercises, roughly $12 million gross) and repaid about $8 million of bank and seller debt; the last $400,000 related-party note was repaid on February 11, 2026. At June 30, 2026 it held $16.9 million of cash and no borrowings. The price of that clean-up was dilution: shares outstanding rose from about 55 million (2024 average) to 94.8 million. The first half of 2026 was mixed: revenue rose 9.6% to $28.2 million, and owner earnings on our basis were about -$0.4 million (against about -$1.4 million in the first half of 2025), but the second-quarter net loss was $1.0 million against $0.3 million a year earlier. We treat this as a business near break-even after stock compensation, not yet a profitable one. Anchor. We use the 2025 business cash flow of about -$1.2 million a year (about -$0.013 per share) as the level, because 2025 is the first year with no debt, reduced stock compensation and reduced overhead; earlier years describe a heavier, debt-funded business. The latest fiscal year improved from about -$5.2 million to -$1.2 million; for year one we assume no further improvement (at or below the trailing rate), since the first-half 2026 figures only partly corroborate it and stock compensation ran at about $3.0 million annualized in the first half, above 2025. What we credited and left out. Credited: the cost reductions that are already visible in the reported results, the cash already in the bank and the absence of debt. Left out: revenue growth. The 18% rise in 2025 and 9.6% in the first half of 2026 come after two flat years ($45.2 million in 2023, $44.8 million in 2024), the company has historically grown by acquisition funded with debt and new shares rather than from its own cash, and 2025's extra revenue came with a lower gross margin, so it did not add profit. Also left out: margin recovery, new contract wins and unexercised options, because none is secured. Excess cash. Of the $16.9 million of cash we count $11.9 million as available to shareholders and hold back $5 million to run a payroll-heavy contractor with about $53 million of revenue. Bear case (value about $0.016 per share). Revenue slips back toward the roughly $45 million of 2023-24 as funded backlog is thin and government budgets or continuing resolutions delay orders; at a 36-37% gross margin that costs about $3 million of gross profit, and owner earnings run at about -$3 million a year for four years before the contracts wind down with nothing left of value. The business is worth about -$10.4 million, it owes nothing, and $11.9 million of excess cash more than covers it, leaving about $1.5 million or $0.016 per share. Further share issuance to fund losses and the risk of falling short of NYSE American listing standards (the company has not received a notice) would make this worse. Base case (value about $0.030 per share). Revenue stays near today's level, owner earnings stay at about -$1.2 million a year for ten years, and nothing evidenced continues after that. The business is worth about -$9.1 million, debt is nil, excess cash is $11.9 million, leaving about $2.8 million or $0.030 per share. In plain terms, on the evidence in hand, the shares are worth roughly the cash that is not needed for operations less the cost of stock compensation and current losses over time. Bull case (value about $0.229 per share). Management's own levers work: gross margin returns toward the 40.8% of 2024 and revenue holds, stock compensation stays contained, and owner earnings move from -$0.4 million in year one to about +$0.5 million in year two and $1.5 million a year from year three through year ten, then fade to zero over about five more years as contracts roll off. The business is worth about $9.9 million, debt is nil, and adding $11.9 million of excess cash gives about $21.7 million or $0.229 per share. What would make this wrong. Higher if the company shows two or more years of positive owner earnings without issuing more shares (the 2026 first-half improvement is encouraging but rests on one report), or if funded backlog converts faster than expected. Lower if revenue drops, if stock compensation rebounds, or if it must raise more equity. We tested two load-bearing assumptions against the filings: that the cash is really free (there is no debt, no restricted cash at year-end 2025, and cash rose from $14.9 million to $16.9 million in the first half of 2026) and that growth should not be credited (2025 revenue rose 18% yet gross margin fell 4.2 points). Nothing found changed the conclusions. Because the values are very small per share and largely made of cash, the margin-of-safety price of $0.05 assumes the owner-earnings condition above is met; without it the cash and base case support no more than $0.02-0.03.