6. 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 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 June 30, 2025, approximately $0.5 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 June 30, 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 condensed consolidated statements of operations and comprehensive loss for the six months ended June 30, 2025.

Summary of Carrying Value