7. Debt Facility

On March 26, 2025 (the “Closing Date”), the Company, as borrower, entered into a Loan and Security Agreement (the “Hercules Loan Agreement”) with the lenders party thereto (the “Lenders”) and Hercules Capital, Inc., as administrative agent and collateral agent. The Hercules Loan Agreement provides for the Company to borrow up to $200 million of term loans (the “Term Loan”) that may be advanced in multiple tranches.

The initial advance of $30 million under the Hercules Loan Agreement was drawn on the Closing Date and used to repay all outstanding obligations under the Company’s prior term loan with Silicon Valley Bank ("SVB Loan"), to pay the Company’s expenses in connection with the Hercules Loan Agreement, and for general corporate purposes. The Hercules Loan Agreement provides the Company may make further draws in the following tranches: (i) subject to FDA approval of the Company’s MOLBREEVI product candidate for the treatment of autoimmune PAP (the “Approval Milestone”), (a) up to $40 million on or prior to March 15, 2026 and (b) up to $40 million on or prior to December 15, 2026; (ii) subject to the Company achieving a trailing six months' net product revenue from the sale of MOLBREEVI of at least seventy-five percent of an agreed upon revenue plan for any reporting period following March 31, 2027 (the “Revenue Milestone”), up to $20 million on or prior to December 31, 2027; and (iii) subject to approval by the Lenders’ investment committees, up to $70 million.

The Term Loan will mature April 1, 2030 (the “Maturity Date”). Amounts outstanding under the Term Loan bear interest at a floating rate equal to (i) the greater of (a) the prime rate reported in The Wall Street Journal or (b) 6.0%, plus (ii) 1.45%, or, subject to the Company meeting the Revenue Milestone, a 25 bps reduction in the interest rate after the full fiscal quarter following such achievement. The Term Loan has an interest-only monthly payment through March 2028 (the “Interest-Only Period”), and beginning April 1, 2028, requires equal monthly installments of principal plus interest until the Maturity Date. If the Company achieves the Approval Milestone, the Interest-Only period will extend until the Maturity Date.

The Company's obligations under the Hercules Loan Agreement are secured, subject to customary permitted liens and other agreed-upon exceptions, by a first-priority perfected security interest in all of the tangible and intangible assets of the Company, other than intellectual property, on which there is a negative pledge. The Hercules Loan Agreement includes customary affirmative and negative covenants, repayment terms, prepayment terms subject to a 1.0% or 2.0% penalty of the amount prepaid as determined when payment occurs following the Closing Date, a contingent prepayment requirement, with any prepayment penalties waived, upon the acquisition or change of control of the Company as defined within the Hercules Loan Agreement, representations and warranties, and events of default, consisting of some events not related to the creditworthiness of the Company, which if triggered, permit the Lenders to accelerate repayment of any outstanding loan amount at the Lenders' discretion. In the event any payment is not paid on the scheduled payment date or upon an aforementioned non-creditworthiness event of default, which may trigger a call feature by the Lenders, an amount equal to 4.0% of such past due amount shall be payable on demand (collectively, the "Default Penalty").

The Hercules Loan Agreement contains an affirmative covenant requiring the Company to maintain unrestricted cash under an account control agreement equal to 50% of the outstanding principal of the Term Loan beginning April 1, 2026 (the “Cash Requirement”), which will decrease to 35% upon achievement of the Revenue Milestone and compliance with the Conditional Minimum Revenue Covenant (defined below). However, if the Approval Milestone has not been achieved, the Cash Requirement increases to 70% of the outstanding principal until the Approval Milestone is achieved. Notwithstanding the foregoing, the Cash Requirement will not apply during any period when the Company’s market capitalization exceeds $600 million.

Additionally, if the Company draws more than $50 million under the Term Loan, beginning nine months after achievement of the Approval Milestone, the Company will be required to have achieved, and to maintain, trailing six months of net product revenue of at least (i) 65% of a provided sales forecast or (ii) $100 million (“Conditional Minimum Revenue Covenant”). If the Company raises at least $75 million in net cash proceeds from the issuance of equity and/or upfront business development proceeds before June 30, 2026, the Conditional Minimum Revenue Covenant will not apply until 15 months after achievement of the Approval Milestone. Notwithstanding the foregoing, the Conditional Minimum Revenue Covenant will not apply during any period when the Company’s market capitalization exceeds $500 million and the Company maintains minimum unrestricted cash under an account control agreement equal to 50% of the outstanding principal amount of the Term Loan.

The Company is obligated to pay customary closing fees, a facility charge equal to 0.5% of the initial tranche at the Closing Date and upon any additional tranches drawn by the Company during the term of the Hercules Loan Agreement, and an end of term charge based upon the outstanding principal balance equal to 3.95% if repayment occurs within 24 months of the Closing Date, 4.95% if repayment occurs after 24 months and before 36 months of the Closing Date, 5.95% if repayment occurs after 36 months and before 48 months of the Closing Date, and 6.95% if repayment occurs after 48 months from the Closing Date.

As of December 31, 2025, approximately $0.4 million of fees consisting of legal, commitment and facility charges, paid to the Lenders were capitalized and will be amortized over the term of the Hercules Loan Agreement.

The Company has identified certain embedded features within the Hercules Loan Agreement. The Company assessed these features and determined the one feature related to Default Penalty interest due upon an event of default is required to be bifurcated from the debt and accounted for separately at fair value. As of December 31, 2025, the Default Penalty does not have a discernable fair value and no amounts are recorded.

The Company accounted for the repayment of the SVB Loan as an extinguishment in accordance with the guidance in ASC 470-50 and recognized a loss associated with the extinguishment of approximately $0.5 million in other income(expense) in the accompanying consolidated statements of operations and comprehensive loss for the twelve months ended the year ended December 31, 2025.

On January 26, 2026, the “Company entered into a First Amendment (the “First Amendment”) to the Hercules Loan Agreement, with Lenders and Hercules Capital, Inc., as administrative agent and collateral agent. As amended, the Loan Agreement provides for the Company to borrow up to an aggregate of $105 million of term loans.

The First Amendment reset the timing and conditions to the Company’s ability to draw up to $75 million of additional term loans under the Hercules Loan Agreement, subject in each case to achievement of the Approval Milestone.

Pursuant to the First Amendment, upon achievement of the Approval Milestone, the Company may borrow up to $75 million of additional term loans under the Hercules Loan Agreement, as amended, as follows:

Up to $45 million through the earlier of (i) 120 days following the Approval Milestone or (ii) June 30, 2027 (the “First Post-Approval Tranche”).
Beginning upon the earlier of the full draw or expiration of the First Post-Approval Tranche, up to $30 million through the earlier of (i) 120 days following the Approval Milestone or (ii) June 30, 2027.

Refer to Note 16. Subsequent Events in the notes to our consolidated financial statements in this annual report on Form 10-K for additional discussion.

Summary of Carrying Value

The following table summarizes the components of the long-term debt carrying value, which approximates the fair value (in thousands):

 

Future minimum payments due during the year ended December 31,

 

 

 

2026

 

$

 

2027

 

 

 

2028

 

 

11,297

 

2029

 

 

14,747

 

2030

 

 

6,041

 

Total future minimum payments

 

 

32,085

 

Unamortized end of term charge

 

 

(1,767

)

Debt fees

 

 

(411

)

Total debt

 

 

29,907

 

Current portion of long-term debt

 

 

 

Long-term debt

 

$

29,907

 

Historical Timeline

Fiscal YearFiled
2025Mar 13, 2026Showing above
2024Mar 27, 2025
2023Mar 7, 2024
2022Mar 30, 2023
2021Mar 30, 2022
2020Mar 10, 2021
2019Mar 12, 2020
2018Mar 13, 2019
2017Mar 14, 2018
2016Mar 6, 2017
2015Mar 14, 2016

About Debt Disclosures

Debt disclosures detail a company's borrowing structure — the types of instruments, interest rates, maturity schedule, and covenant restrictions that define its financial obligations and flexibility. This section is essential for assessing refinancing risk, interest rate exposure, and the margin of safety against financial distress.

Key signals: the maturity schedule reveals concentration risk — large maturities within 1-2 years during tight credit markets can force dilutive refinancing or asset sales. Compare the fair value of debt against carrying amount to gauge whether the market views the company's credit risk differently than the balance sheet suggests. Watch covenant compliance disclosures for tightening cushions, especially leverage and interest coverage ratios. Variable-rate debt exposure quantifies sensitivity to interest rate changes. Secured versus unsecured mix affects recovery rates and future borrowing capacity. Compare net debt-to-EBITDA against industry peers and covenant limits to assess financial health.