Star Therapeutics Funding, Investors & Competitors

Star Therapeutics has raised $315M across 3 funding rounds, most recently a $125M Series D in September 2025.

Last Star Therapeutics funding round

$125M

Series D · Sep 2025

Cumulative funding Star Therapeutics raised

$315M

across 3 funding rounds

Key investors in Star Therapeutics

  • OrbiMed
  • RA Capital Management
  • Cormorant Asset Management
  • Viking Global Investors
  • Redmile Group
  • Sofinnova Investments
  • Sanofi Ventures
  • New Leaf Venture Partners

Star Therapeutics Overview

About Star Therapeutics

Star Therapeutics is a biopharmaceutical company developing therapies for multiple diseases affecting millions of patients. The firm advances drug candidates targeting unmet medical needs through clinical-stage pipelines in various therapeutic areas.


Founded

2018

HQ

United StatesSan Francisco, CA

Status

Privately held

Customer focus

B2B

Revenue model

Licensing

Star Therapeutics Funding History

Star Therapeutics has raised a total of $315M across 3 funding rounds.

Star Therapeutics' first fundraising round was a $100M undisclosed-stage round in February 2022. The most recent completed round was a $125M Series D in September 2025.

Star Therapeutics funding rounds

Star Therapeutics funding rounds
DateStageInvestorsRaisedDeal Summary
Sep 2025Series DSanofi Ventures (lead); Viking Global Investors (lead)$125MStar Therapeutics, a clinical-stage biotechnology company based in South San Francisco, develops best-in-class antibodies for bleeding disorders and other diseases in hematology and immunology. Its lead program, VGA039, is a first-in-class monoclonal antibody targeting Protein S to restore blood clotting balance, positioned as a universal hemostatic therapy starting with von Willebrand disease (VWD), the most common inherited bleeding disorder affecting over 50,000 diagnosed and treated patients in the US. On September 30, 2025, Star Therapeutics announced an oversubscribed $125 million Series D financing round co-led by Sanofi Ventures and Viking Global Investors. New investors included Janus Henderson Investors, Frazier Life Sciences, and GordonMD Global Investments, while existing backers such as OrbiMed, RA Capital Management, Qatar Investment Authority (QIA), Redmile Group, Sofinnova Investments, Blue Owl Capital, and others participated. The proceeds will advance the company's pipeline, particularly VGA039, which has initiated a pivotal Phase 3 clinical trial evaluating monthly subcutaneous injections for all types of VWD. VGA039 has received orphan drug and fast track designations from the FDA and aims to reduce treatment burden compared to factor replacement prophylaxis requiring two to three IV infusions weekly. As part of the financing, Jason Hafler, Ph.D., from Sanofi Ventures joined the board of directors, and Maneka Mirchandaney from Viking Global Investors became a board observer. The company previously spun out Electra Therapeutics as an independent entity focused on rare diseases, while retaining its Vega program for blood disorders. CEO and founder Adam Rosenthal emphasized the funding's reinforcement of the mission to deliver life-changing therapies for bleeding disorders. Investors highlighted VWD's sizable patient population and unmet needs, positioning Star to create substantial patient impact and long-term value with VGA039's Phase 3 advancement.
Sep 2023Series CSofinnova Investments (lead)$90MStar Therapeutics is a biotechnology company that operates as a portfolio company, forming subsidiaries focused on specific biology areas with first-in-class antibody therapies targeting unmet needs in hematology and immunology. It has launched two publicly disclosed offshoots: Electra Therapeutics, now independently financed, and Vega Therapeutics, which remains under Star’s wing and focuses on blood disorders. The $90 million oversubscribed Series C financing, announced in September 2023 and led by Sofinnova Investments, included new investors Qatar Investment Authority, Catalio Capital Management, Agent Capital, Soleus Capital, and NYBC Ventures, plus all seven existing investors including Westlake Village BioPartners, OrbiMed, Redmile Group, RA Capital Management, New Leaf Venture Partners, Cormorant Asset Management, and Cowen Healthcare Investments. This round brought total funding to nearly $190 million since founding in late 2018. Proceeds from the Series C will support growth of portfolio companies, development of new antibody drugs for diseases with high unmet need, and clinical advancement of VGA039, a monoclonal antibody for von Willebrand disease (VWD), a bleeding disorder. VGA039, which received FDA orphan-drug designation, is in a Phase 1a/1b study launched earlier in 2023, with funds to carry it through the full trial. Star positions itself as an innovation engine generating additional biotech companies, replicating success in rapidly advancing antibodies from idea to clinic.
Feb 2022Undisclosed stageCowen Healthcare Investments; Redmile Group; New Leaf Venture Partners; RA Capital Management; Westlake Village BioPartners; OrbiMed; Cormorant Asset Management$100MStar Therapeutics, a South San Francisco-based biotechnology company founded in 2018, emerged from stealth mode on February 16, 2022, announcing over $100 million in total financing raised since inception from Westlake Village BioPartners, OrbiMed, Redmile Group, Cormorant Asset Management, RA Capital Management, Cowen Healthcare Investments, and New Leaf Venture Partners. The company operates as an innovation engine for rare disease therapies, applying expertise in rare diseases and antibody drug discovery to develop first-in-class programs targeting multiple diseases with single therapies, all internally generated from early discovery. This funding supported further development in rare diseases and the spin-out of Electra Therapeutics, its first portfolio company, which simultaneously announced an $84 million Series B financing. Star's approach involves creating a family or constellation of companies, each focused on specific biology areas with therapies addressing shared biological drivers across multiple rare diseases, aiming to unlock limited understanding of disease biology where only about 650 FDA-approved drugs exist for roughly 7,000 rare diseases. The leadership team, including CEO and Founder Adam Rosenthal, PhD, and Executive Board Chair Nancy Stagliano, PhD, has a track record in antibody development, including sutimlimab (ENJAYMO), the first FDA-approved treatment for cold agglutinin disease. At emergence, Star revealed its first clinical-stage program through Electra. Subsequent financings include a $90 million oversubscribed Series C in September 2023 led by Sofinnova Investments with participation from existing investors, bringing total funding over $190 million, to advance pipeline including VGA039 in Phase 1a/1b for blood disorders via portfolio company Vega Therapeutics. In September 2025, an oversubscribed $125 million Series D co-led by Sanofi Ventures and Viking Global Investors supported Phase 3 advancement of VGA039, a monoclonal antibody targeting Protein S for von Willebrand disease and other bleeding disorders, with total funding exceeding $300 million. Star has shifted focus primarily to VGA039 as a universal hemostatic therapy while retaining potential for additional portfolio growth.

Who has invested in Star Therapeutics?

10 investors have backed Star Therapeutics across its funding rounds, including OrbiMed, RA Capital Management, Cormorant Asset Management, Viking Global Investors, Redmile Group and Sofinnova Investments.

Lead investors include Sanofi Ventures, Viking Global Investors and Sofinnova Investments.


Star Therapeutics Investors

Investors in Star Therapeutics by funding rounds participated
InvestorHQRoundsRoleFirst check
Cowen Healthcare InvestmentsUnited StatesNew York City, NY1ParticipantFeb 2022
Redmile GroupUnited StatesSan Francisco, CA1ParticipantFeb 2022
New Leaf Venture PartnersUnited StatesNew York City, NY1ParticipantFeb 2022
RA Capital ManagementUnited StatesBoston, MA1ParticipantFeb 2022
Westlake Village BioPartnersUnited StatesLos Angeles, CA1ParticipantFeb 2022
OrbiMedUnited StatesNew York City, NY1ParticipantFeb 2022
Sofinnova InvestmentsUnited StatesSan Francisco, CA1LeadSep 2023
Viking Global InvestorsUnited StatesStamford, CT1LeadSep 2025

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Benchmark 350K+ Funding Rounds and Disclosed VC Valuation Multiples

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Star Therapeutics Competitors

Star Therapeutics competitors include listed companies like Eli Lilly, Johnson & Johnson, AbbVie and Merck, and private ones like Biosplice Therapeutics and Biocon Biologics.

Public and private companies comparable to Star Therapeutics
CompanyHQStatusRevenueEBITDAValuationRevenue Multiple
Eli LillyUnited StatesUnited StatesPublicly listed$65B$28B$1.0T13.1x
Johnson & JohnsonUnited StatesUnited StatesPublicly listed$94B$40B$651B6.8x
AbbVieUnited StatesUnited StatesPublicly listed$61B$17B$467B8.1x
MerckUnited StatesUnited StatesPublicly listed$65B$28B$363B6.2x
Biosplice TherapeuticsUnited StatesSan Diego, CAPrivate--$12B-
Biocon BiologicsIndiaBangalorePrivate$1.1B-$4.5B4.2x

Star Therapeutics Public Comps

Star Therapeutics is still privately-owned, but its public comps include Eli Lilly, Johnson & Johnson, AbbVie, Merck, Roche, Novartis, AstraZeneca, Amgen, Novo Nordisk and Gilead Sciences.

Last FYEV/RevenueEV/EBITDA
RevenueEBITDALast FYLTM2027ELast FYLTM2027E
Eli Lilly$65B$28B16.5x13.1x38.7x27.0x
Johnson & Johnson$94B$40B7.2x6.8x17.0x18.3x
AbbVie$61B$17B8.7x8.1x30.6x17.6x
Merck$65B$28B6.3x6.2x14.7x21.0x
Roche$77B$26B5.0x4.9x14.6x12.4x
Novartis$57B$22B5.5x5.5x14.2x13.3x
AstraZeneca$59B$19B4.8x4.5x14.6x12.7x
Amgen$37B$17B6.8x6.5x14.8x14.4x

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Common questions about Star Therapeutics

When was Star Therapeutics founded?Star Therapeutics was founded in 2018.
Where is Star Therapeutics headquartered?Star Therapeutics is headquartered in San Francisco, CA, United States.
Is Star Therapeutics publicly listed?No, Star Therapeutics is a private, VC-backed company.
How much funding has Star Therapeutics raised?Star Therapeutics has raised $315M across 3 funding rounds.
What was Star Therapeutics' last funding round?Star Therapeutics' last funding round was a $125M Series D in September 2025, led by Sanofi Ventures and Viking Global Investors.
Who are Star Therapeutics' investors?Star Therapeutics' investors include Cowen Healthcare Investments, Redmile Group, New Leaf Venture Partners, RA Capital Management, Westlake Village BioPartners, OrbiMed, Sofinnova Investments, Viking Global Investors, Sanofi Ventures and Cormorant Asset Management.
Which companies are comparable to Star Therapeutics?Companies comparable to Star Therapeutics include Eli Lilly, Johnson & Johnson, AbbVie, Merck, Biosplice Therapeutics and Biocon Biologics.

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