Commitments and Contingencies	6 Months Ended
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Lease Commitments In May 2025, the Company amended the operating lease for its corporate headquarters in Skokie IL., the terms of which terminated certain floors of the leased space and was treated as a lease modification as of the effective date. The partial lease termination of the corporate headquarters leased space resulted in a reduction in the Company’s future minimum fixed lease obligations as of the lease modification date. As a result of the partial lease termination, the Company remeasured its operating lease liabilities and recorded a decrease of $13,085 to reflect the reduced lease payments. The Company also recorded a decrease to right-of-use assets of $13,025 based on the proportionate decrease in the right-of-use asset, which resulted in a gain of $60 recognized in other income (expense), net within the Company’s consolidated statements of operations and comprehensive loss for the six months ended June 30, 2025. The lease liability was remeasured using a revised incremental borrowing rate (“IBR”) of 8.0% as of the amendment date in determining the present value of lease payments. The Company estimated the IBR based upon comparing interest rates available in the market for similar borrowings and the credit quality of the Company. Under the terms of the lease agreement for the Company’s headquarters, the Company was required to deliver the security deposit in the form of a letter of credit to the landlord no later than June 30, 2025. Until such delivery, the obligation represents a commitment under the lease agreement. The letter of credit will not be drawn upon unless the Company fails to perform under the lease terms. Litigation The Company is, and may from time to time be, involved in legal proceedings and exposed to potential claims in the normal course of business. As of June 30, 2025 and December 31, 2024, the Company did not have any reasonably possible or probable losses from such claims. Schara litigation In May 2024, a putative class action complaint (the “Complaint”) was filed in the Delaware Court of Chancery against LanzaTech f/k/a/ AMCI, AMCI Sponsor II LLC (“AMCI Sponsor”) and the individual directors of AMCI (the “Director Defendants”) for purported damages arising from the Business Combination. The Company was subsequently voluntarily dismissed from the case in July 2024, before it was required to respond to the Complaint. The Complaint asserts claims for (i) breach of fiduciary duty against the Director Defendants; and (ii) unjust enrichment against AMCI Sponsor and the Director Defendants. The parties have not yet engaged in any discovery in connection with the litigation and the Director Defendants have not yet been required to respond to the Complaint. The Company and the Director Defendants believe the allegations and claims made in the Complaint are without merit. As the surviving entity following the merger at issue, the Company has certain indemnification obligations to the Director Defendants in connection with the defense of the litigation. The Company has notified the relevant D&O insurance carriers of the litigation and while the Director Defendants are covered for such costs by directors’ and officers’ insurance, such coverage is subject to a retention of $5,000. FPA litigation In relation to the FPA, the Company’s volume-weighted average share price was below $3.00 per share for 50 trading days during the 60 day consecutive trading period ended on July 1, 2024 (the “VWAP Trigger Event”). On July 22, 2024, Vellar (one of the Purchasers) notified the Company of a VWAP Trigger Event, purporting to accelerate the FPA Maturity Date of its portion of the Recycled Shares (i.e., 2,990,000 shares) to July 22, 2024. Vellar asserts that it is entitled to: (i) the Maturity Consideration of $7,500 (payable at the Company’s option in cash or shares of common stock valued at the average daily VWAP Price (as defined in the FPA) over 30 scheduled trading days ending on the accelerated FPA Maturity Date of July 22, 2024 of $1.91 per share) and (ii) Share Consideration of $2,539, payable in cash, in each case, due and payable on July 24, 2024. On July 25, 2024 the Company received a notice from Vellar pursuant to the FPA, stating that the Company is in default of its payment obligations. On July 30, 2024, the Company received a notice of an event of default under the FPA from Vellar that (i) designated such date as the early termination date of the FPA and (ii) purports to result in an early termination cash payment of $4,164 becoming due to Vellar (equating to the sum of the Maturity Consideration and the Share Consideration minus the VWAP Price (as defined in the FPA) (as of July 29, 2024) of Vellar’s portion of the Recycled Shares). On July 24, 2024, LanzaTech filed suit against Vellar, primarily in connection with Vellar’s sale of Recycled Shares, which LanzaTech alleges are in breach of the FPA’s requirement that Recycled Shares be held in a bankruptcy remote special purpose vehicle for the benefit of the Company unless the sale is noticed to the Company as part of an early termination, which Vellar has not done. In the event of a sale of Recycled Shares subject to an optional early termination, the Company is entitled to receive approximately $10.16 for each share sold (see Note 2 - Summary of Significant Accounting Policies). LanzaTech believes that Vellar’s notice regarding the VWAP Trigger Event and consequently, its notice of an event of default, is not valid and accordingly, that no payments are owed to Vellar in connection with the purported acceleration of the FPA Maturity Date or early termination of the FPA. LanzaTech filed an amended complaint on September 30, 2024. Vellar moved to dismiss. On August 12, 2025, the Court denied in part and granted in part Vellar’s motion to dismiss. The Company intends to vigorously pursue its claim against Vellar. On October 23, 2024, Vellar filed suit against the Company, alleging breach of the FPA, and seeking $4,164 plus interest. The Company intends to vigorously defend itself against the claim. On October 24, 2024, Vellar sought advancement of certain expenses from the Company in connection with this litigation. The Company denied the request on October 28, 2024. Vellar filed a motion for advancement of fees on November 20, 2024, which was fully briefed on December 20, 2024. On August 12, 2025, the Court denied the motion.. On April 11, 2025, Vellar filed a motion to amend the complaint and a motion to consolidate the two related actions between LanzaTech and Vellar. Both motions were granted. Vellar filed the amended complaint on April 23, 2025 adding a claim for breach of the FPA Warrants, to which LanzaTech and Vellar are parties and seeking damages, including liquidated damages under the FPA Warrants. LanzaTech filed an answer to the amended complaint on May 14, 2025. Convertible Note Litigation On May 16, 2025, Carbon Direct Capital, the former holder of the Convertible Note, commenced a lawsuit against the Company in the Supreme Court of the State of New York (“Supreme Court”). The complaint filed in the action contends that the mandatory conversion of the Convertible Note formerly held by Carbon Direct Capital in connection with the Series A Preferred Stock Issuance, is invalid under the terms of the Convertible Note, and even if a mandatory conversion had occurred, Carbon Direct Capital would be entitled to consideration in the form of Series A Preferred Stock and PIPE Warrant rather than the shares of common stock that the Company issued to Carbon Direct Capital in the mandatory conversion. Simultaneously with filing the complaint, Carbon Direct Capital moved via order to show cause for a temporary restraining order and preliminary injunction voiding the mandatory conversion under the Convertible Note and sought expedited discovery. On May 21, 2025, the Supreme Court denied Carbon Direct Capital’s request for a temporary restraining order. On June 13, 2025, the Supreme Court denied Carbon Direct Capital’s motion for a preliminary injunction. On July 3, 2025, the Supreme Court granted the Company’s motion to dismiss Carbon Direct Capital’s complaint in full, finding that plaintiff had failed to state a claim for breach of contract or breach of the implied covenant of good faith and fair dealing. On August 1, 2025, Carbon Direct Capital filed a notice of appeal to the Appellate Division, First Department of the Supreme Court’s decision dismissing the complaint. The Company disputes the allegations in the complaint and intends to defend itself against the claims asserted therein. On June 30, 2025, Carbon Direct Capital commenced a separate lawsuit in the Delaware Court of Chancery. The complaint filed in the action contended that the proxy statement for the July 28, 2025 annual meeting of stockholders contained material misstatements or omissions. Carbon Direct Capital moved for expedited proceedings and requested a schedule on a motion for preliminary injunction. On July 11, 2025, the Court of Chancery denied Carbon Direct Capital’s motion to expedite. On July 28, 2025, the Company moved to dismiss the complaint. On August 5, 2025, Carbon Direct Capital filed a notice of voluntary dismissal of the action. As of August 19, 2025, the Company did not have sufficient information to predict the outcome of the lawsuits.

In May 2025, the Company amended the operating lease for its corporate headquarters in Skokie IL., the terms of which terminated certain floors of the leased space and was treated as a lease modification as of the effective date. The partial lease termination of the corporate headquarters leased space resulted in a reduction in the Company’s future minimum fixed lease obligations as of the lease modification date. As a result of the partial lease termination, the Company remeasured its operating lease liabilities and recorded a decrease of $13,085 to reflect the reduced lease payments. The Company also recorded a decrease to right-of-use assets of $13,025 based on the proportionate decrease in the right-of-use asset, which resulted in a gain of $60 recognized in other income (expense), net within the Company’s consolidated statements of operations and comprehensive loss for the six months ended June 30, 2025. The lease liability was remeasured using a revised incremental borrowing rate (“IBR”) of 8.0% as of the amendment date in determining the present value of lease payments. The Company estimated the IBR based upon comparing interest rates available in the market for similar borrowings and the credit quality of the Company.

Under the terms of the lease agreement for the Company’s headquarters, the Company was required to deliver the security deposit in the form of a letter of credit to the landlord no later than June 30, 2025. Until such delivery, the obligation represents a commitment under the lease agreement. The letter of credit will not be drawn upon unless the Company fails to perform under the lease terms.

In May 2024, a putative class action complaint (the “Complaint”) was filed in the Delaware Court of Chancery against LanzaTech f/k/a/ AMCI, AMCI Sponsor II LLC (“AMCI Sponsor”) and the individual directors of AMCI (the “Director Defendants”) for purported damages arising from the Business Combination. The Company was subsequently voluntarily dismissed from the case in July 2024, before it was required to respond to the Complaint. The Complaint

asserts claims for (i) breach of fiduciary duty against the Director Defendants; and (ii) unjust enrichment against AMCI Sponsor and the Director Defendants. The parties have not yet engaged in any discovery in connection with the litigation and the Director Defendants have not yet been required to respond to the Complaint. The Company and the Director Defendants believe the allegations and claims made in the Complaint are without merit. As the surviving entity following the merger at issue, the Company has certain indemnification obligations to the Director Defendants in connection with the defense of the litigation. The Company has notified the relevant D&O insurance carriers of the litigation and while the Director Defendants are covered for such costs by directors’ and officers’ insurance, such coverage is subject to a retention of $5,000.

In relation to the FPA, the Company’s volume-weighted average share price was below $3.00 per share for 50 trading days during the 60 day consecutive trading period ended on July 1, 2024 (the “VWAP Trigger Event”). On July 22, 2024, Vellar (one of the Purchasers) notified the Company of a VWAP Trigger Event, purporting to accelerate the FPA Maturity Date of its portion of the Recycled Shares (i.e., 2,990,000 shares) to July 22, 2024. Vellar asserts that it is entitled to: (i) the Maturity Consideration of $7,500 (payable at the Company’s option in cash or shares of common stock valued at the average daily VWAP Price (as defined in the FPA) over 30 scheduled trading days ending on the accelerated FPA Maturity Date of July 22, 2024 of $1.91 per share) and (ii) Share Consideration of $2,539, payable in cash, in each case, due and payable on July 24, 2024. On July 25, 2024 the Company received a notice from Vellar pursuant to the FPA, stating that the Company is in default of its payment obligations. On July 30, 2024, the Company received a notice of an event of default under the FPA from Vellar that (i) designated such date as the early termination date of the FPA and (ii) purports to result in an early termination cash payment of $4,164 becoming due to Vellar (equating to the sum of the Maturity Consideration and the Share Consideration minus the VWAP Price (as defined in the FPA) (as of July 29, 2024) of Vellar’s portion of the Recycled Shares).

On July 24, 2024, LanzaTech filed suit against Vellar, primarily in connection with Vellar’s sale of Recycled Shares, which LanzaTech alleges are in breach of the FPA’s requirement that Recycled Shares be held in a bankruptcy remote special purpose vehicle for the benefit of the Company unless the sale is noticed to the Company as part of an early termination, which Vellar has not done. In the event of a sale of Recycled Shares subject to an optional early termination, the Company is entitled to receive approximately $10.16 for each share sold (see Note 2 - Summary of Significant Accounting Policies). LanzaTech believes that Vellar’s notice regarding the VWAP Trigger Event and consequently, its notice of an event of default, is not valid and accordingly, that no payments are owed to Vellar in connection with the purported acceleration of the FPA Maturity Date or early termination of the FPA. LanzaTech filed an amended complaint on September 30, 2024. Vellar moved to dismiss. On August 12, 2025, the Court denied in part and granted in part Vellar’s motion to dismiss. The Company intends to vigorously pursue its claim against Vellar.

On October 23, 2024, Vellar filed suit against the Company, alleging breach of the FPA, and seeking $4,164 plus interest. The Company intends to vigorously defend itself against the claim. On October 24, 2024, Vellar sought advancement of certain expenses from the Company in connection with this litigation. The Company denied the request on October 28, 2024. Vellar filed a motion for advancement of fees on November 20, 2024, which was fully briefed on December 20, 2024. On August 12, 2025, the Court denied the motion.. On April 11, 2025, Vellar filed a motion to amend the complaint and a motion to consolidate the two related actions between LanzaTech and Vellar. Both motions were granted. Vellar filed the amended complaint on April 23, 2025 adding a claim for breach of the FPA Warrants, to which LanzaTech and Vellar are parties and seeking damages, including liquidated damages under the FPA Warrants. LanzaTech filed an answer to the amended complaint on May 14, 2025.

On May 16, 2025, Carbon Direct Capital, the former holder of the Convertible Note, commenced a lawsuit against the Company in the Supreme Court of the State of New York (“Supreme Court”). The complaint filed in the action contends that the mandatory conversion of the Convertible Note formerly held by Carbon Direct Capital in connection with the Series A Preferred Stock Issuance, is invalid under the terms of the Convertible Note, and even if a mandatory conversion had occurred, Carbon Direct Capital would be entitled to consideration in the form of Series A Preferred Stock and PIPE Warrant rather than the shares of common stock that the Company issued to Carbon Direct Capital in the mandatory conversion. Simultaneously with filing the complaint, Carbon Direct Capital moved via order to show cause for a temporary restraining order and preliminary injunction voiding the mandatory conversion under the Convertible Note and sought expedited discovery. On May 21, 2025, the Supreme Court denied Carbon Direct Capital’s request for a temporary restraining order. On June 13, 2025, the Supreme Court denied Carbon Direct Capital’s motion

for a preliminary injunction. On July 3, 2025, the Supreme Court granted the Company’s motion to dismiss Carbon Direct Capital’s complaint in full, finding that plaintiff had failed to state a claim for breach of contract or breach of the implied covenant of good faith and fair dealing. On August 1, 2025, Carbon Direct Capital filed a notice of appeal to the Appellate Division, First Department of the Supreme Court’s decision dismissing the complaint.

On June 30, 2025, Carbon Direct Capital commenced a separate lawsuit in the Delaware Court of Chancery. The complaint filed in the action contended that the proxy statement for the July 28, 2025 annual meeting of stockholders contained material misstatements or omissions. Carbon Direct Capital moved for expedited proceedings and requested a schedule on a motion for preliminary injunction. On July 11, 2025, the Court of Chancery denied Carbon Direct Capital’s motion to expedite. On July 28, 2025, the Company moved to dismiss the complaint. On August 5, 2025, Carbon Direct Capital filed a notice of voluntary dismissal of the action.