Commitments and Contingencies	3 Months Ended
Mar. 31, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Litigation and Claims The Company is involved in various pending and threatened litigation matters in the ordinary course of business. In the future, it may be subject to additional legal proceedings, the scope and severity of which is unknown and could adversely affect its business. In addition, from time to time, the Company may receive letters or other forms of communication asserting claims against it. On November 11, 2025, one of Firefly’s purported stockholders filed a putative class action complaint in the United States District Court for the Western District of Texas in an action captioned Diamond v. Firefly Aerospace Inc., et al., Case No. 1:25-cv-01812 (W.D. Tex.) (the “Securities Action”). The complaint names Firefly and certain of Firefly’s current and former directors and officers as defendants, and asserts claims for alleged violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Rule 10b-5 promulgated thereunder and Sections 11 and 15 of the Securities Act of 1933, as amended (the “Securities Act”), arising from allegedly false or misleading statements or omissions of purportedly material fact concerning the demand and growth prospects of Firefly’s Spacecraft Solutions offerings and the operational readiness and commercial viability of the Alpha rocket. On March 26, 2026, the Court appointed a lead plaintiff, pursuant to the Private Securities Litigation Reform Act of 1995 and recaptioned the case as In re Firefly Aerospace Securities Litigation. The lead plaintiff in this matter is expected to file an amended complaint by May 29, 2026. Firefly intends to defend itself vigorously against these allegations and claims, but is currently unable to predict the outcome of this lawsuit and therefore cannot determine the likelihood of loss nor estimate a range of possible loss. On December 23, 2025, one of Firefly’s purported stockholders filed a complaint in the United States District Court for the Western District of Texas in an action captioned Shadowbolt v. Kim, et al., Case No. 1:25-cv-02126 (W.D. Tex.) (the “Derivative Action”). The plaintiff seeks to pursue claims, purportedly on Firefly’s behalf, against certain of Firefly’s current and former directors and officers for alleged breaches of fiduciary duty and contribution under Section 21D of the Exchange Act and Section 11(f) of the Securities Act, among other common law causes of action, arising from substantially the same allegations at issue in the Securities Action. The Derivative Action is stayed in its entirety pending entry of final judgment, including after any appeals have been pursued or exhausted, in the Securities Action. Firefly is currently unable to predict the outcome of this lawsuit and therefore cannot determine the likelihood of loss nor estimate a range of possible loss.In addition to the above, in the ordinary course of business, Firefly is involved in a variety pending and threatened litigation matters, and in the future, Firefly may be subject to additional legal proceedings, the scope of which is unknown and could adversely affect our business. In addition, from time to time, we may receive letters or other forms of communication asserting claims against us. Regardless of the outcome, these proceedings could adversely impact our business because of defense costs, diversion of management resources, and other factors. Although the results of legal proceedings and claims are inherently unpredictable and uncertain, Firefly currently does not believe that these matters, individually or in the aggregate, will materially affect Firefly’s business, financial position, results of operations or cash flows. Contingencies From time to time, the Company may have certain contingent liabilities that arise in the ordinary course of business activities. The Company accrues a liability for such matters when it is probable that a liability has been incurred and the amount can be reasonably estimated. When only a range of a possible loss can be established, the most probable amount in the range is accrued. If no amount within the range is a better estimate than any other amount within the range, the minimum amount in the range is accrued. The accrual for a litigation loss contingency might include, for example, estimates of potential damages, outside legal fees, and other directly related costs expected to be incurred. The Company does not believe that any such matters, individually or in the aggregate, will materially affect the Company's consolidated financial condition, results of operations, or cash flows. The Company recognized $1.5 million and $2.3 million in contingent liabilities related to Spaceflight, Inc. contracts as of March 31, 2026 and December 31, 2025, respectively, which is included in other non-current liabilities in the unaudited condensed consolidated balance sheets. Due to the resolution of certain of the underlying matters, the balance decreased by $0.8 million during the three months ended March 31, 2026, and resulted in a net gain recognized in the condensed consolidated statements of net loss and comprehensive loss during the three months ended March 31, 2026. Indemnification Agreements In the ordinary course of business, the Company enters into agreements that may include indemnification provisions. Pursuant to such agreements, the Company may indemnify, hold harmless and defend an indemnified party for losses suffered or incurred by the indemnified party. Some of the provisions will limit losses to those arising from third-party actions. In some cases, the indemnification will continue after the termination of the agreement. The maximum potential amount of future payments the Company could be required to make under these provisions is not determinable. To date, the Company has not incurred material costs to defend lawsuits or settle claims related to these indemnification provisions. The Company has also entered into indemnification agreements with its directors and officers that may require the Company to indemnify its directors and officers against liabilities that may arise by reason of their status or service as directors or officers to the fullest extent permitted by Delaware corporate law. The Company also currently has directors’ and officers’ insurance.

Commitments and Contingencies

3 Months Ended

Mar. 31, 2026

Commitments and Contingencies Disclosure [Abstract]

12. Commitments and Contingencies

Litigation and Claims

The Company is involved in various pending and threatened litigation matters in the ordinary course of business. In the future, it may be subject to additional legal proceedings, the scope and severity of which is unknown and could adversely affect its business. In addition, from time to time, the Company may receive letters or other forms of communication asserting claims against it.

On November 11, 2025, one of Firefly’s purported stockholders filed a putative class action complaint in the United States District Court for the Western District of Texas in an action captioned Diamond v. Firefly Aerospace Inc., et al., Case No. 1:25-cv-01812 (W.D. Tex.) (the “Securities Action”). The complaint names Firefly and certain of Firefly’s current and former directors and officers as defendants, and asserts claims for alleged violations of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Rule 10b-5 promulgated thereunder and Sections 11 and 15 of the Securities Act of 1933, as amended (the “Securities Act”), arising from allegedly false or misleading statements or omissions of purportedly material fact concerning the demand and growth prospects of Firefly’s Spacecraft Solutions offerings and the operational readiness and commercial viability of the Alpha rocket. On March 26, 2026, the Court appointed a lead plaintiff, pursuant to the Private Securities Litigation Reform Act of 1995 and recaptioned the case as In re Firefly Aerospace Securities Litigation. The lead plaintiff in this matter is expected to file an amended complaint by May 29, 2026. Firefly intends to defend itself vigorously against these allegations and claims, but is currently unable to predict the outcome of this lawsuit and therefore cannot determine the likelihood of loss nor estimate a range of possible loss.

On December 23, 2025, one of Firefly’s purported stockholders filed a complaint in the United States District Court for the Western District of Texas in an action captioned Shadowbolt v. Kim, et al., Case No. 1:25-cv-02126 (W.D. Tex.) (the “Derivative Action”). The plaintiff seeks to pursue claims, purportedly on Firefly’s behalf, against certain of Firefly’s current and former directors and officers for alleged breaches of fiduciary duty and contribution under Section 21D of the Exchange Act and Section 11(f) of the Securities Act, among other common law causes of action, arising from substantially the same allegations at issue in the Securities Action. The Derivative Action is stayed in its entirety pending entry of final judgment, including after any appeals have been pursued or exhausted, in the Securities Action. Firefly is currently unable to predict the outcome of this lawsuit and therefore cannot determine the likelihood of loss nor estimate a range of possible loss.In addition to the above, in the ordinary course of business, Firefly is involved in a variety pending and threatened litigation matters, and in the future, Firefly may be subject to additional legal proceedings, the scope of which is unknown and could adversely affect our business. In addition, from time to time, we may receive letters or other forms of communication asserting claims against us. Regardless of the outcome, these proceedings could adversely impact our business because of defense costs, diversion of management resources, and other factors. Although the results of legal proceedings and claims are inherently unpredictable and uncertain, Firefly currently does not believe that these matters, individually or in the aggregate, will materially affect Firefly’s business, financial position, results of operations or cash flows.

Contingencies

From time to time, the Company may have certain contingent liabilities that arise in the ordinary course of business activities. The Company accrues a liability for such matters when it is probable that a liability has been incurred and the amount can be reasonably estimated. When only a range of a possible loss can be established, the most probable amount in the range is accrued. If no amount within the range is a better estimate than any other amount within the range, the minimum amount in the range is accrued. The accrual

for a litigation loss contingency might include, for example, estimates of potential damages, outside legal fees, and other directly related costs expected to be incurred.

The Company does not believe that any such matters, individually or in the aggregate, will materially affect the Company's consolidated financial condition, results of operations, or cash flows.

The Company recognized $1.5 million and $2.3 million in contingent liabilities related to Spaceflight, Inc. contracts as of March 31, 2026 and December 31, 2025, respectively, which is included in other non-current liabilities in the unaudited condensed consolidated balance sheets. Due to the resolution of certain of the underlying matters, the balance decreased by $0.8 million during the three months ended March 31, 2026, and resulted in a net gain recognized in the condensed consolidated statements of net loss and comprehensive loss during the three months ended March 31, 2026.

Indemnification Agreements

In the ordinary course of business, the Company enters into agreements that may include indemnification provisions. Pursuant to such agreements, the Company may indemnify, hold harmless and defend an indemnified party for losses suffered or incurred by the indemnified party. Some of the provisions will limit losses to those arising from third-party actions. In some cases, the indemnification will continue after the termination of the agreement. The maximum potential amount of future payments the Company could be required to make under these provisions is not determinable. To date, the Company has not incurred material costs to defend lawsuits or settle claims related to these indemnification provisions. The Company has also entered into indemnification agreements with its directors and officers that may require the Company to indemnify its directors and officers against liabilities that may arise by reason of their status or service as directors or officers to the fullest extent permitted by Delaware corporate law. The Company also currently has directors’ and officers’ insurance.