CTM

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EXHIBIT 99.1

Castellum Announces Third Quarter 2026 Financial Results

Ended the Quarter with a Debt-Free Balance Sheet and $24.5 Million of Cash and Accounts Receivable

Reported Total Backlog of $254.5 Million and Opportunity Pipeline of $1.66 billion

Expect Record Revenue for Full Year 2026

Conference Call Scheduled for Friday, November 6 at 10am ET

VIENNA, Va., November 5, 2026 (GLOBE NEWSWIRE) – Castellum, Inc. (NYSE-American: CTM) (“Castellum,” “CTM,” “we,” or the “Company”), a defense tech services and solutions provider focused on the federal government, today announced its financial results for the three- and nine-month periods (“Q3” and “9M”) ended September 30, 2026.

Q3 2026 Financial Highlights

•Revenues of $14.7 million, as compared to $14.6 million in Q3 2025 and $13.9 million in Q2 2026.

•Gross profit of $5.3 million, or 36% of revenues, as compared to $5.5 million, or 38% of revenues, in Q3 2025 and $4.7 million, or 34% of revenues, in Q2 2026.

•Adjusted EBITDA* of approximately $0.6 million, as compared to $1.1 million in Q3 2025 and $0.03 million in Q2 2026.

•Net loss of $(0.5) million (or $(0.01) per basic and diluted share), as compared to net income of $0.4 million or $0.00 per basic and diluted share in Q3 2025 and a net loss of $(1.1) million (or $(0.01) per basic and diluted share) in Q2 2026.

•Cash and accounts receivable at September 30, 2026 totaled $24.5 million, as compared to $24.0 million at June 30, 2026 and $23.1 million at December 31, 2025.

•No long-term debt as of September 30, 2026.

9M 2026 Financial Highlights

•Revenues of $42.9 million, as compared to $40.3 million in 9M 2025.

•Gross profit of $15.1 million, as compared to $15.1 million in 9M 2025.

•Adjusted EBITDA* of $1.0 million, as compared to $1.8 million in 9M 2025.

EXHIBIT 99.1

•Net loss was $(1.9) million (or $(0.02) per basic and diluted share), as compared to a net loss of $(1.2) million (or $(0.01) per basic and diluted share) in 9M 2025.

*Q3 2026 Adjusted EBITDA excludes certain non-cash expenses, including stock-based compensation of $0.8 million and depreciation and amortization of $0.3 million, as compared to stock-based compensation of $0.3 million and depreciation and amortization of $0.4 million in Q3 2025. 9M 2026 Adjusted EBITDA excludes stock-based compensation of $2.4 million and depreciation and amortization of $1.0 million, as compared to stock-based compensation of $2.1 million and depreciation and amortization of $1.1 million in 9M 2025. See the reconciliation to non-GAAP Adjusted EBITDA chart below.

Q3 2026 Operational Highlights

•Total scheduled backlog of $254.5 million at September 30, 2026, consisted of $18.2 million funded and $236.3 million unfunded, compared to a total backlog of $271.7 million at June 30, 2026.

•Qualified opportunity pipeline at September 30, 2026, increased to approximately $1.662 billion, as compared to $953.5 million at June 30, 2026.

•In August 2026, CTM was awarded a $32.8 million NAVAIR contract modification to its subsidiary Global Technology and Management Resources, Inc., under the PMA-290 Special Missions contract, increasing the total value of this contract to $136.2 million.

Executive Commentary

Glen Ives, President and Chief Executive Officer of Castellum, commented, “While third quarter revenue increased slightly year over year, revenue for the first nine months of 2026 grew 6%, reflecting continued execution on the major long-term prime contracts we secured in 2025. While the timing of contract awards, program ramp-ups and revenue recognition can cause quarterly fluctuations, we believe our year-to-date performance and expanding business opportunities provide a clearer measure of our overall trajectory.”

“We ended the third quarter with a total scheduled backlog of $254.5 million and expect to recognize approximately 25% and 51% of the remaining performance obligations within the next 12 and 24 months, respectively. During the quarter, we also refined our backlog reporting by including priced contract options, previously reported separately, within unfunded backlog. This change provides a clearer view of our contracted business and aligns our reporting with industry standards.”

“Our qualified opportunity pipeline grew to approximately $1.66 billion, up from $953.5 million at the end of the second quarter, expanding the range of potential contracts we are pursuing. Together, our backlog and pipeline provide a foundation for future revenue and opportunities for additional growth as we work to convert qualified opportunities into contract awards.”

David Bell, Chief Financial Officer of Castellum, noted, “Revenue for the first nine months of 2026 increased to $42.9 million from $40.3 million a year ago, while gross profit remained relatively flat at $15.1 million. A higher mix of subcontractor work, which typically carries lower margins than direct labor, limited gross profit gro

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EX-99.1

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EXHIBIT 99.1

Castellum Announces First Quarter 2026 Financial Results

Revenue Increase of 23% Driven by Ramp Up of Long-Term Contracts Won in 2025; Enters Second Quarter with a Record Backlog of $273.3 Million

VIENNA, Va., May 8, 2026 (GLOBE NEWSWIRE) -- Castellum, Inc. (NYSE-American: CTM) (“Castellum” “CTM”, “we” or the “Company”), a cybersecurity, electronic warfare, and software services company focused on the federal government, today announced its financial results for the three-month period (“Q1”) ended March 31, 2026.

Q1 2026 Financial Highlights

•Revenues of $14.3 million, up 23% as compared to $11.7 million in Q1 2025.

•Gross profit of $5.1 million, up 11% as compared to $4.6 million in Q1 2025.

•Adjusted EBITDA* was $0.4 million, compared to $0.08 million in Q1 2025.

•Net loss was $0.4 million (or $0.00 per basic and diluted share), improved from a net loss of $1.2 million (or $0.01 per basic and diluted share) in Q1 2025.

•Cash and cash equivalents as of March 31, 2026 was $15.8 million, as compared to $14.9 million at December 31, 2025.

•No long-term debt; the remaining long-term obligations were paid off during the quarter.

* Q1 2026 Adjusted EBITDA excludes certain non-cash expenses, including stock-based compensation of $0.8 million and depreciation and amortization of $0.3 million, as compared to stock-based compensation of $1.2 million and depreciation and amortization of $0.4 million in Q1 2025. See the reconciliation to non-GAAP Adjusted EBITDA chart below.

Q1 2026 Operational Highlights

•Total backlog reached a record $273.3 million as of March 31, 2026, up from $265 million at December 31, 2025.

•Qualified pipeline totaled $938 million as of March 31, 2026, up from $817 million at December 31, 2025, reflecting a substantial increase in identified opportunities.

Glen Ives, President and Chief Executive Officer of Castellum, commented, “Our strong Q1 2026 results reflect the momentum we built throughout a standout 2025, when we secured over $219 million in contracts across three major, long‑term prime wins and deepened our relationships with the U.S. Navy and other key federal customers. The 23% revenue increase for Q1 2026 was driven by production ramp‑up of these new contract wins. We ended the quarter with a record backlog of approximately $273 million, which provides us with multi‑year revenue visibility. We currently expect to recognize approximately 16% of this backlog over the next 12 months and approximately 49% over the next 24 months, with the remainder recognized thereafter. Similarly, the pipeline of qualified opportunities continues to increase, and we had $938 million in identified opportunities at quarter-end, which is a testament of the strength of our strategy and the competitiveness of our offerings for complex, mission‑critical programs in cybersecurity, electronic warfare, and advanced engineering.”

EXHIBIT 99.1

David Bell, Chief Financial Officer of Castellum, noted, “Q1 2026 was our best first quarter ever and second best of any quarter on record in terms of revenue and delivered a significantly improved bottom line. Strong year-over-year revenue growth, combined with our ongoing efforts to improve production efficiencies, resulted in increased gross profit for the quarter, while our gross margin of 35.4% was somewhat affected by changes in contract mix and type. During the quarter, we also completed the payoff of our remaining long-term debt, which lowered our interest expense substantially. We ended the period with a debt‑free balance sheet and $15.8 million in cash, which give us the flexibility to invest in growth initiatives while maintaining a solid financial profile.”

Discussing the go-forward strategy, Mr. Ives concluded, “We have entered Phase 3 of Castellum’s evolution, and our priorities are clear. We are focused on building on our strong organic growth momentum, fully leveraging our new CMMC Level 2 C3PAO certification as a key competitive differentiator in the DoD market, federal cyber and mission‑critical programs, and selectively exploring compelling M&A opportunities that meet our criteria. In parallel, we will continue investing in mission-critical technologies and capabilities which will enable us to further expand our markets, client base, and capture emerging growth opportunities. As we progress through 2026, we remain focused on disciplined execution to position Castellum for sustainable, long-term growth and enhanced shareholder value.”

About Castellum, Inc.

Castellum, Inc. (NYSE-American: CTM) is a technology company focused on leveraging the power of information technology to help solve our Nation's most pressing national security challenges. CTM provides U.S. government and commercial clients with Cybersecurity, Software Development, Systems Engineering, Information / Electronic Warfare, Program Support, and Data Analytics services. It also offers subject matter expertis