As of March 31, 2026, the aggregate fair value of the Company’s debt was $3.2 billion, which included the fair value of the 2032 4.25% Convertible Notes of $11.5 million, the 2032 2.375% Convertible Notes of $447.3 million, the 2036 2.00% Convertible Notes of $1,230.1 million and the 2036 2.25% Convertible Notes of $1,037.3 million. As of December 31, 2025, the aggregate fair value of the Company’s debt was approximately $2.5 billion, which included the fair value of the 2032 4.25% Convertible Notes of $147.2 million, the 2032 2.375% Convertible Notes of $760.8 million, and the 2036 2.00% Convertible Notes of $1,156.7 million. The fair value of the 2032 4.25% Convertible Notes was determined based on recent observable market quote in an active market and rolled forward to balance sheet date using significant inputs derived from, or corroborated by, observable market data (Level 2 inputs). The fair value of the 2032 2.375% Convertible Notes, the 2036 2.00% Convertible Notes, and the 2036 2.25% Convertible Notes were determined based on observable market quotes in an active market around year-end (Level 1 inputs). The fair value of remaining debt has been determined under the discounted cash flow method using significant inputs derived from, or corroborated by, observable market data (Level 2 inputs).

Debt discount and issuance costs are comprised of costs incurred in connection with debt issuance and are presented in the unaudited condensed consolidated balance sheets as a deduction to the carrying amount of the debt and amortized using the effective interest method to interest expense over the term of the debt. During the three months ended March 31, 2026 and 2025, the Company recognized $21.7 million and $4.7 million of interest expense related to the debt noted above, respectively. The interest expense included amortization of debt issuance costs of $2.0 million and $0.3 million for the three months ended March 31, 2026 and 2025, respectively.

As of March 31, 2026, the Company was in compliance with all debt covenants requirements.

2032 4.25% Convertible Notes

On January 27, 2025, the Company issued $460.0 million aggregate principal amount of convertible senior notes due 2032 (the “2032 4.25% Convertible Notes”), including the exercise in full of the option granted to the initial purchasers to purchase up to $60.0 million aggregate principal amount of notes. The 2032 4.25% Convertible Notes are senior, unsecured obligations of the Company and bear interest at a fixed rate of 4.25% per year, payable semiannually in arrears on March 1 and September 1 of each year, beginning on September 1, 2025. The 2032 4.25% Convertible Notes will mature on March 1, 2032, unless earlier repurchased, redeemed, or converted.

Holders may convert their notes at their option at any time prior to the close of business on the business day immediately preceding December 1, 2031 only under the following conditions: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2025 (and only during such calendar quarter), if the last reported sale price of the Company’s Class A Common Stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s Class A Common Stock and the conversion rate on each such trading day; (3) if the Company issues a notice of redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after December 1, 2031 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their notes at any time, at the option of the holder regardless of the foregoing conditions. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s Class A Common Stock or a combination of cash and shares of the Company’s Class A Common Stock, at the Company’s election.

The Company may not redeem the notes prior to March 6, 2029. The Company may redeem for cash all or any portion of the notes, at the Company’s option, on or after March 6, 2029, but only if (1) the liquidity condition (as defined in the indenture) is satisfied and (2) the last reported sale price of the Company’s Class A Common Stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption, at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the notes.

The initial conversion rate for the 2032 4.25% Convertible Notes is 37.0535 shares of Class A Common Stock per $1,000 principal amount of the notes, which represents an initial conversion price of approximately $26.99 per share of the Company’s Class A Common Stock. The conversion rate and conversion price are subject to customary adjustments upon the occurrence of certain events. In addition, holders who convert their notes in connection with a make-whole fundamental change or a notice of redemption may be entitled to an increase in the conversion rate.

The 2032 4.25% Convertible Notes include customary covenants and certain events of default after which the notes may be declared immediately due and payable and set forth certain types of bankruptcy or insolvency events of default after which the notes become automatically due and payable.

On July 3, 2025, July 31, 2025 and October 29, 2025, the Company completed the repurchase of $225.0 million, $135.0 million and $50.0 million, respectively, of the outstanding principal amount of the 2032 4.25% Convertible Notes in separate, privately negotiated repurchase transactions with a limited number of note holders for an aggregate repurchase price of approximately $502.9 million, $346.9 million and $161.1 million, respectively, which included accrued and unpaid interest on the repurchased 2032 4.25% Convertible Notes. The repurchase was funded with the net proceeds from a registered direct offering of 9,450,268 shares, 5,775,635 shares and 2,048,849 shares, respectively, of the Company’s Class A Common Stock to the same note holders participating in the note repurchase. The note repurchases and the shares offering were cross-conditional. The Company accounted for the note repurchases as induced conversions and recognized an additional charge to equity for the carrying value of the notes repurchased and the related fair value of consideration paid to holders of the 2032 4.25% Convertible Notes in excess of the value to which there were entitled to receive pursuant to the original conversion terms (“2032 4.25% Convertible Notes 2025 Sweetener Payment”). The induced conversion expenses included the related 2032 4.25% Convertible Notes 2025 Sweetener Payment and the third party transaction costs incurred and were presented in other (expense) income, net in the Company’s audited consolidated financial statements on Form 10-K for the year ended December 31, 2025.

On February 20, 2026 and February 23, 2026, the Company completed an additional repurchase of approximately $46.5 million of the outstanding principal amount of the 2032 4.25% Convertible Notes in separate, privately negotiated repurchase transactions with a limited number of note holders for an aggregate repurchase price of approximately $180.5 million. The repurchase was funded with the net proceeds from a registered direct offering of 1,862,741 shares of the Company’s Class A Common Stock to the same note holders participating in the note repurchase. The note repurchases and the shares offering were cross-conditional. The Company accounted for the note repurchases as induced conversions and recognized a $56.5 million charge to equity for $45.3 million of carrying value of the notes repurchased and $11.2 million of the fair value of consideration paid to holders of the 2032 4.25% Convertible Notes in excess of the value to which they were entitled to receive pursuant to the original conversion terms (“2032 4.25% Convertible Notes 2026 Sweetener Payment”). The Company recorded the 2032 4.25% Convertible Notes 2026 Sweetener Payment and the approximately $0.4 million of third party transaction costs incurred in other (expense) income, net in the Company’s unaudited condensed consolidated statements of operations.

2032 2.375% Convertible Notes

On July 29, 2025, the Company issued $575.0 million aggregate principal amount of convertible senior notes due 2032 (the “2032 2.375% Convertible Notes”), including the exercise in full of the option granted to the initial purchasers to purchase up to $75.0 million aggregate principal amount of notes. The 2032 2.375% Convertible Notes are senior, unsecured obligations of the Company and bear interest at a fixed rate of 2.375% per year, payable semiannually in arrears on April 15 and October 15 of each year, beginning on April 15, 2026. The 2032 2.375% Convertible Notes will mature on October 15, 2032, unless earlier repurchased, redeemed, or converted.

Holders may convert their notes at their option at any time prior to the close of business on the business day immediately preceding July 15, 2032 only under the following conditions: (1) during any calendar quarter commencing after the calendar quarter ending on December 31, 2025 (and only during such calendar quarter), if the last reported sale price of the Company’s Class A Common Stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company’s Class A Common Stock and the conversion rate on each such trading day; (3) if the Company issues a notice of redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the redemption date; or (4) upon the occurrence of specified corporate events. On or after July 15, 2032 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their notes at any time, at the option of the holder regardless of the foregoing conditions. Upon conversion, the Company will pay or deliver, as the case may be, cash, shares of the Company’s Class A Common Stock or a combination of cash and shares of the Company’s Class A Common Stock, at the Company’s election.

The Company may not redeem the notes prior to October 22, 2029. The Company may redeem for cash all or any portion of the notes, at the Company’s option, on or after October 22, 2029, but only if (1) the liquidity condition (as defined in the indenture) is satisfied and (2) the last reported sale price of the Company’s Class A Common Stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which the Company provides notice of redemption, at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the notes.

The initial conversion rate for the 2032 2.375% Convertible Notes is 13.8750 shares of Class A Common Stock per $1,000 principal amount of the notes, which represents an initial conversion price of approximately $72.07 per share of the Company’s Class A Common Stock. The conversion rate and conversion price are subject to customary adjustments upon the occurrence of certain events. In addition, holders who convert their notes in connection with a make-whole fundamental change or a notice of redemption may be entitled to an increase in the conversion rate.

The 2032 2.375% Convertible Notes include customary covenants and certain events of default after which the notes may be declared immediately due and payable and set forth certain types of bankruptcy or insolvency events of default after which the notes become automatically due and payable.

On February 20, 2026 and February 23, 2026, the Company completed the repurchase of $250.0 million of the outstanding principal amount of the 2032 2.375% Convertible Notes in separate, privately negotiated repurchase transactions with a limited number of note holders for an aggregate repurchase price of approximately $433.7 million, which included accrued and unpaid interest on the repurchased 2032 2.375% Convertible Notes. The repurchase was funded with the net proceeds from a registered direct offering of 4,475,223 shares of the Company’s Class A Common Stock to the same note holders participating in the note repurchase. The note repurchases and the shares offering were cross-conditional. The Company accounted for the note repurchases as induced conversions and recognized a $324.6 million charge to equity for $247.2 million of carrying value of the notes repurchased including accrued and unpaid interest and $77.4 million of fair value of consideration paid to holders of the 2032 2.375% Convertible Notes in excess of the value to which they were entitled to receive pursuant to the original conversion terms (“2032 2.375% Convertible Notes Sweetener Payment”). The Company recorded the 2032 2.375% Convertible Notes Sweetener Payment and the approximately $0.4 million of third party transaction costs incurred in other (expense) income, net in the Company’s unaudited condensed consolidated statements of operations.

2036 2.25% Convertible Notes

On February 17, 2026, the Company issued $1,000.0 million aggregate principal amount of convertible senior notes due 2036 (the “2.25% Notes”) with an option by the initial purchasers to purchase up to an additional $150.0 million aggregate principal amount of the 2.25% Notes. On February 19, 2026, the Company was notified by the initial purchasers of the 2.25% Notes of the exercise of their option to purchase an additional $75.0 million aggregate principal amount of the 2.25% Notes (the “2.25% Option Notes”, and together with the 2.25% Notes, the “2036 2.25% Convertible Notes”). On February 20, 2026, the Company consummated the sale of the 2036 2.25% Convertible Notes to the initial purchasers. The 2036 2.25% Convertible Notes are senior, unsecured obligations of the Company and bear interest at a fixed rate of 2.25% per year, payable semiannually in arrears on April 15 and October 15 of each year, beginning on October 15, 2026. The 2036 2.25% Convertible Notes will mature on April 15, 2036, unless earlier converted or repurchased.

Holders may convert their notes at their option at any time prior to the close of business on the business day immediately preceding January 15, 2036 only under the following conditions: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2026 (and only during such calendar quarter), if the last reported sale price of the Company’s Class A common stock, par value $0.0001 per share, for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (2) during the five business day period after any ten consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of the notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Class A Common Stock and the conversion rate on each such trading day; or (3) upon the occurrence of specified corporate events. On or after January 15, 2036 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their notes, at any time, in integral multiples of $1,000 principal amount, at the option of the holder regardless of the foregoing conditions. Upon conversion, the Company may satisfy its conversion obligation by paying or delivering, as the case may be, cash, shares of Class A Common Stock or a combination of cash and shares of Class A Common Stock, at the Company’s election. The Company may not redeem the notes prior to the maturity date, and no sinking fund is provided for the notes.

The initial conversion rate for the 2036 2.25% Convertible Notes is 8.5982 shares of Class A Common Stock per $1,000 principal amount of the notes, which represents an initial conversion price of approximately $116.30 per share of the Company’s Class A Common Stock. The conversion rate and conversion price are subject to customary adjustments upon the occurrence of certain events. In addition, following certain corporate events that occur prior to the maturity date of the notes, the Company will, under certain circumstances, increase the conversion rate of the notes for a holder who elects to convert its notes in connection with such a corporate event.

The 2036 2.25% Convertible Notes include customary covenants and certain events of default after which the notes may be declared immediately due and payable and set forth certain types of bankruptcy or insolvency events of default after which the notes become automatically due and payable.

Prosperity Capital Equipment Loan

On August 14, 2023, AST LLC and certain other subsidiaries of the Company entered into a loan agreement with Lone Star State Bank of West Texas (“Lone Star”), succeeded by Prosperity Bank by merger with Lone Star, providing for a $15.0 million principal term loan secured by certain real property fixtures and equipment in one of the Company’s Texas facilities (the “Lone Star Loan Agreement”). The entire term loan amount was borrowed on September 19, 2023.

Borrowings accrued interest at the Prime Rate plus 0.75%, subject to a ceiling rate. Interest payments were due and payable on a monthly basis. Interest payments began in September 2023 and principal payments began in April 2025. Principal repayments were due thereafter in 48 equal monthly installments until January 2029, the maturity date of the loan. In connection with the Lone Star Loan Agreement, the Company deposited a cash balance of $15.0 million in the Lone Star Bank Money Market Fund. The Lone Star Loan Agreement included certain customary affirmative and negative covenants.

As part of AST LLC and certain other subsidiaries of the Company (together with AST LLC, the “AST Companies”) entering into the Trinity Capital Equipment Loan, the AST Companies and Prosperity Bank amended the Lone Star Loan Agreement whereby Prosperity Bank released the lien on certain real property fixtures and equipment and the AST Companies pledged the $15.0 million deposit in the Lone Star Bank Money Market Fund as a security for the loan.

On March 11, 2026, the Company repaid the principal amount, including accrued interest aggregating to approximately $12.1 million.

Prosperity Term Loan

On December 8, 2021, the Company’s subsidiary, AST & Science Texas, LLC, executed an agreement to purchase real property, including offices, industrial warehouse buildings and equipment for a total purchase price of $8.0 million. In connection with the purchase, AST & Science Texas, LLC entered into an agreement (the “Term Loan Credit Agreement”) with Lone Star, succeeded by Prosperity Bank by merger with Lone Star, to issue a term promissory note for $5.0 million with a maturity date of December 8, 2028 that was secured by the property. Borrowings under the Term Loan Credit Agreement had a fixed interest rate of 4.20% per annum. Interest was payable monthly in arrears commencing in January 2022. Thereafter, outstanding principal and accrued interest were due and payable in monthly installments of $40,000, commencing in January 2023.

On March 11, 2026, the Company repaid the principal amount, including accrued interest aggregating to approximately $4.2 million.

Other than as described above, there were no new debt issuances or significant changes related to the above listed debt during the three months ended March 31, 2026. See Note 7 Debt to the Company’s Consolidated Financial Statements included in its 2025 Annual Report on Form 10-K for additional information regarding the debt listed above.