Welcome to our dedicated page for Spero Therapeuti news (Ticker: SPRO), a resource for investors and traders seeking the latest updates and insights on Spero Therapeuti stock.
Spero Therapeutics, Inc. develops clinical-stage treatments for rare diseases and diseases with high unmet need, with news centered on anti-infective programs for multi-drug resistant bacterial infections. Updates frequently cover tebipenem HBr, an investigational oral carbapenem antibiotic for complicated urinary tract infections, including pyelonephritis, and its licensed development and commercialization relationship with GSK outside certain Asian territories.
Company announcements also report quarterly and annual operating results, business updates, clinical data presentations, FDA submission activity, portfolio-expansion efforts, cash runway commentary, and equity-compensation grants under Nasdaq rules.
Spero Therapeutics (SPRO) granted equity awards to new employees under its 2019 Inducement Equity Incentive Plan, effective September 1, 2026.
The Compensation Committee approved an aggregate of 102,000 restricted stock units (RSUs) and 67,600 stock options as inducement grants in accordance with Nasdaq Listing Rule 5635(c)(4). The plan is used solely for individuals who were not previously employed by Spero, or rejoin after a bona fide break in service. Stock options vest 25% on September 1, 2027, with the balance vesting in 36 equal monthly installments thereafter, while RSUs vest in four equal annual installments starting September 1, 2027, in each case subject to continued employment and the plan and award agreements.
Spero Therapeutics (SPRO)/b) will present at the H.C. Wainwright 28th Annual Global Investment Conference in New York City on September 15, 2026, at 1:30 PM ET.President and CEO Esther Rajavelu will deliver the company presentation, and Spero's leadership team will be available for one-on-one meetings. The presentation will be webcast, with access via Spero's website Events + Presentations page and a replay available for about 90 days.
Spero Therapeutics (Nasdaq: SPRO) reported second quarter 2026 results and major strategic milestones. Net loss was $9.6 million (vs. $1.7 million in Q2 2025), or $0.16 per diluted share. Total revenue was $0 compared with $14.2 million a year earlier, as prior collaboration and grant revenue was fully recognized in earlier periods.
Research and development expenses fell to $3.4 million from $10.7 million, mainly due to reduced Utebzi Phase 3 costs, while general and administrative expenses increased to $6.5 million from $5.9 million. Cash and cash equivalents were $50.8 million at June 30, 2026, excluding proceeds from a subsequent royalty financing.
Operationally, the FDA approved Utebzi, the first and only oral carbapenem for certain adult cUTI patients, with GSK holding U.S. and European commercialization rights. Spero also entered an exclusive license with Innovent Biologics for SP001 outside Greater China, closed a $105 million non-recourse, non-dilutive royalty financing backed by a portion of future Utebzi proceeds, and appointed Debra Jeske Zack, M.D., Ph.D., as Chief Medical Officer. The company expects its June 30 cash plus financing proceeds to fund operations into the second half of 2029.
Spero Therapeutics (Nasdaq: SPRO) announced that its Board Compensation Committee approved an inducement equity grant under the 2019 Inducement Equity Incentive Plan to a new employee. Effective August 3, 2026, the grant consists of 324,622 stock options and 162,311 restricted stock units (RSUs), made in accordance with Nasdaq Listing Rule 5635(c)(4), which permits equity awards as a material inducement to employment for individuals not previously employed by the company.
The stock options vest 25% on August 3, 2027, with the remaining 75% vesting in 36 equal monthly installments thereafter, subject to continued employment. The RSUs vest in four equal annual installments beginning August 3, 2027, also contingent on continued employment. Both the options and RSUs are governed by the terms of the 2019 Inducement Plan and the related award agreements.
Spero Therapeutics (Nasdaq: SPRO) will report its financial results for the second quarter ended June 30, 2026, on Wednesday, August 12, 2026, after market close. Management will hold a conference call and live audio webcast at 5:00 p.m. EDT to discuss results, business, and pipeline updates.
Investors can join by dialing 1-877-407-0789 (domestic) or 1-201-689-8562 (international) using conference ID 13762082, or via a webcast link available on the Investors page of the Spero website. An archived webcast will remain accessible for 30 days.
Spero Therapeutics (Nasdaq: SPRO) has appointed Debra Jeske Zack, M.D., Ph.D., as Chief Medical Officer, adding more than 25 years of experience in developing therapeutics for immune-mediated diseases. She will lead clinical development as Spero advances SP001, a Phase 2-ready third-generation anti-CD40L antibody for IgG4-related disease and other immune-mediated conditions.
According to Spero, Dr. Zack is a board-certified rheumatologist with prior leadership roles at Amgen, Exagen, Xencor and Novartis, as well as academic experience at UCLA. She will help shape clinical strategy for SP001 and future immunology pipeline opportunities.
Spero Therapeutics (Nasdaq: SPRO) announced a $105 million non-recourse, non-dilutive royalty financing with affiliates of Healthcare Royalty (HCRx), a business of KKR, backed by a portion of future Utebzi (tebipenem pivoxil) milestones and royalties from GSK.
According to Spero, proceeds will primarily fund Phase 2 development of SP001, a Phase 2-ready, Fc-silent, third-generation anti-CD40L monoclonal antibody for immune-mediated diseases, in-licensed from Innovent Biologics under an exclusive agreement signed concurrently with the financing. HCRx will receive quarterly principal and interest payments derived solely from GSK payments owed to Spero until the loan is repaid, after which Spero will retain 35% of subsequent GSK Utebzi milestone and royalty payments. Spero also updated its cash runway guidance into the second half of 2029.
Spero Therapeutics (Nasdaq: SPRO) and Innovent Biologics (01801.HK) announced an exclusive license for SP001 (IBI355), a third-generation Fc-silent anti-CD40L antibody. Spero receives exclusive rights to develop, research, manufacture, and commercialize SP001 worldwide, excluding Greater China, where Innovent retains rights.
According to Spero, Innovent will receive an upfront payment and is eligible for development, regulatory and commercial milestone payments, for a total deal value of about US$1.1 billion, plus tiered royalties on net sales in Spero’s territories. Spero expects to start a Phase 2 trial in IgG4-related disease in Q2 2027, while Innovent plans a China Phase 2 trial in Sjögren’s disease by early 2027. SP001 has been evaluated by Innovent in two Phase 1 healthy volunteer studies and a Phase 1b multiple-ascending-dose study in Sjögren’s disease patients, with data presented at the EULAR 2026 Congress.
Spero Therapeutics (Nasdaq: SPRO) and GSK (NYSE: GSK) received FDA approval for Utebzi (tebipenem pivoxil), the first and only oral carbapenem for adult complicated urinary tract infections (cUTIs), including pyelonephritis, caused by certain susceptible pathogens in patients with limited or no alternative oral options.
Approval is based on the phase III PIVOT-PO trial showing non-inferiority to intravenous imipenem-cilastatin, with a 58.5% overall success rate versus 60.2% for IV therapy. Utebzi is expected to be available in the US by the end of 2026.
Compass Pathways (Nasdaq: CMPS) elected Kathleen Tregoning to its Board of Directors at the annual general meeting. She will serve on the Compensation and Leadership Development Committee and the Nominating and Corporate Governance Committee.
According to Compass Pathways, Tregoning brings extensive biopharma experience, including senior roles at Cerevel Therapeutics, Sanofi and Biogen, plus health policy work in the U.S. Congress. The company highlights progress for its investigational therapy COMP360, including two Phase 3 trials that met their primary endpoint and a rolling NDA submission and review for treatment-resistant depression.