Business	9 Months Ended
Sep. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	Business Avalo Therapeutics, Inc. (the “Company” or “Avalo” or “we”) is a clinical stage biotechnology company dedicated to developing therapeutics targeting the IL-1β pathway for immune-mediated inflammatory diseases. Avalo is advancing its lead anti-IL-1β monoclonal antibody (“mAb”) drug candidate, abdakibart, into a phase 3 registrational program in hidradenitis suppurativa (“HS”), a chronic inflammatory skin condition that affects an estimated 1%-4% of the population globally. Avalo is pursuing additional development opportunities in IL-1β driven indications. Avalo is also developing AVTX-010, a long-acting next-generation anti-IL-1β mAb. Avalo was incorporated in Delaware and commenced operation in 2011, and completed its initial public offering in October 2015. Liquidity Since inception, we have incurred significant operating losses and negative cash flows from our operations. We have primarily funded our operations to date through sales of equity securities, out-licensing transactions and sales of assets. For the nine months ended September 30, 2026, Avalo generated a net loss of $74.9 million and negative cash flows from operations of $49.2 million. As of September 30, 2026, Avalo had $462.8 million in cash and cash equivalents and investments. In accordance with Accounting Standards Codification Topic 205-40, Presentation of Financial Statements - Going Concern, the Company evaluated its ability to continue as a going concern within one year after the date that the accompanying condensed consolidated financial statements are issued. Based on our current operating plans, we expect that our existing cash and cash equivalents and investments are sufficient to fund operations for at least twelve months from the filing date of this Quarterly Report on Form 10-Q. The Company closely monitors its cash and cash equivalents and seeks to balance the level of cash and cash equivalents with our projected needs to allow us to withstand periods of uncertainty relative to the availability of funding on favorable terms. We may satisfy any future cash needs through sales of equity securities under the Company’s at-the-market program or other equity financings, out-licensing transactions, strategic alliances/collaborations, sale of programs, and/or mergers and acquisitions. There can be no assurance that any financing or business development initiatives can be realized by the Company, or if realized, what the terms may be. To the extent that we raise capital through the sale of equity, the ownership interest of our existing stockholders will be diluted, and the terms may include liquidation or other preferences that adversely affect the rights of our stockholders. Further, if the Company raises additional funds through collaborations, strategic alliances or licensing arrangements with third parties, the Company might have to relinquish valuable rights to its technologies, future revenue streams, research programs or product candidates.

Business

9 Months Ended

Sep. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Avalo Therapeutics, Inc. (the “Company” or “Avalo” or “we”) is a clinical stage biotechnology company dedicated to developing therapeutics targeting the IL-1β pathway for immune-mediated inflammatory diseases. Avalo is advancing its lead anti-IL-1β monoclonal antibody (“mAb”) drug candidate, abdakibart, into a phase 3 registrational program in hidradenitis suppurativa (“HS”), a chronic inflammatory skin condition that affects an estimated 1%-4% of the population globally. Avalo is pursuing additional development opportunities in IL-1β driven indications. Avalo is also developing AVTX-010, a long-acting next-generation anti-IL-1β mAb.

Avalo was incorporated in Delaware and commenced operation in 2011, and completed its initial public offering in October 2015.

Liquidity

Since inception, we have incurred significant operating losses and negative cash flows from our operations. We have primarily funded our operations to date through sales of equity securities, out-licensing transactions and sales of assets.

For the nine months ended September 30, 2026, Avalo generated a net loss of $74.9 million and negative cash flows from operations of $49.2 million. As of September 30, 2026, Avalo had $462.8 million in cash and cash equivalents and investments.

In accordance with Accounting Standards Codification Topic 205-40, Presentation of Financial Statements - Going Concern, the Company evaluated its ability to continue as a going concern within one year after the date that the accompanying condensed consolidated financial statements are issued. Based on our current operating plans, we expect that our existing cash and cash equivalents and investments are sufficient to fund operations for at least twelve months from the filing date of this Quarterly Report on Form 10-Q. The Company closely monitors its cash and cash equivalents and seeks to balance the level of cash and cash equivalents with our projected needs to allow us to withstand periods of uncertainty relative to the availability of funding on favorable terms. We may satisfy any future cash needs through sales of equity securities under the Company’s at-the-market program or other equity financings, out-licensing transactions, strategic alliances/collaborations, sale of programs, and/or mergers and acquisitions. There can be no assurance that any financing or business development initiatives can be realized by the Company, or if realized, what the terms may be. To the extent that we raise capital through the sale of equity, the ownership interest of our existing stockholders will be diluted, and the terms may include liquidation or other preferences that adversely affect the rights of our stockholders. Further, if the Company raises additional funds through collaborations, strategic alliances or licensing arrangements with third parties, the Company might have to relinquish valuable rights to its technologies, future revenue streams, research programs or product candidates.