Sirius Therapeutics Funding, Investors & Competitors

Sirius Therapeutics has raised $110M across 2 funding rounds, most recently a $50M Series B in May 2025.

Last Sirius Therapeutics funding round

$50M

Series B · May 2025

Cumulative funding Sirius Therapeutics raised

$110M

across 2 funding rounds

Key investors in Sirius Therapeutics

  • OrbiMed
  • Hankang Capital
  • Creacion Ventures
  • BioTrack Capital
  • Delos Capital

Sirius Therapeutics Overview

About Sirius Therapeutics

Sirius Therapeutics is a biopharmaceutical company developing RNA interference therapeutics targeting cardiovascular and metabolic diseases. Its pipeline features SRSD107, a small interfering RNA molecule inhibiting coagulation factor XI to treat thromboembolic disorders, SRSD101 for dyslipidemia management, and SRSD216 addressing hyperlipoproteinemia(a) linked to atherosclerotic cardiovascular disease. Headquartered in San Diego, the company advances siRNA-based treatments through preclinical and clinical stages.


Founded

2021

HQ

United StatesSan Diego, CA

Status

Privately held

Customer focus

B2B

Revenue model

Licensing

Sirius Therapeutics Funding History

Sirius Therapeutics has raised a total of $110M across 2 funding rounds.

Sirius Therapeutics' first fundraising round was a $60M Series B in October 2023. The most recent completed round was a $50M Series B in May 2025.

Sirius Therapeutics funding rounds

Sirius Therapeutics funding rounds
DateStageInvestorsRaisedDeal Summary
May 2025Series BBioTrack Capital (lead); Creacion Ventures; OrbiMed; Hankang Capital$50MSirius Therapeutics, founded in 2021, is a clinical-stage biotechnology company developing transformative siRNA therapeutics for chronic diseases, particularly cardiometabolic disorders. The company operates innovation centers in the United States and a translational medicine center in China, with programs like SRSD216 (for hyperlipoproteinemia in atherosclerotic cardiovascular disease, Phase 1 started after FDA and NMPA approvals) and SRSD101 (for dyslipidemia, Phase 1 in China). On May 9, 2025, Sirius announced completion of a nearly $50 million Series B2 financing round led by a corporate venture capital firm (with BioTrack Capital as new investor and existing investors OrbiMed, Creacion Ventures, and Hankang Capital participating), bringing total funding to nearly $150 million to date. Funds will advance clinical development of siRNA therapeutics and next-generation RNA delivery technologies. Specific investors in the Series B2 included BioTrack Capital ($10 million), Image Frame Investment ($20 million), and Sky Future Investment ($1 million), per HKEX filing details on the April 22, 2025 share purchase agreement involving Sirius entities in Hong Kong, U.S., Australia, and Shanghai. Valuation was determined via arm's length negotiations based on business development and R&D progress, with increases from prior Series B attributed to clinical advancements in SRSD107 and SRSD216, including promising Phase 1 data for SRSD107. Post-round, Sirius advanced partnerships, including a collaboration with CRISPR Therapeutics announced around September 2025, involving $25 million cash and $70 million equity upfront for co-development of SRSD107 (50-50 cost/profit share, CRISPR leading U.S. commercialization, Sirius Greater China), with options for two more programs and royalties. SRSD107 showed >93% FXI reduction and >2x aPTT increase lasting up to 6 months in Phase 1; first Phase 2 patient dosed in Europe by September 22, 2025.
Oct 2023Series BHankang Capital (lead); Creacion Ventures; Delos Capital; OrbiMed$60MSirius Therapeutics is a global clinical-stage biotechnology company founded in 2021, focused on developing novel siRNA therapeutics, particularly for cardiovascular diseases, with an innovation center in the United States and a translational medicine center in China. The company completed its Series B financing in 2023, raising US$60 million led by Hankang Capital, with participation from Delos Capital, OrbiMed, and Creacion Ventures, to advance clinical development of investigational siRNA drugs like SRSD107 (targeting Factor XI for thrombotic diseases) and expand its pipeline of next-generation RNA delivery technologies. The post-money valuation for this round, based on the share purchase agreement dated May 31, 2023 and fully settled by October 4, 2023, was US$47.5 million, reflecting arm's-length negotiations considering R&D progress. To date from this round, Sirius had raised nearly US$100 million in total funding across its Series A and B rounds. The funds were allocated to human studies of siRNA drugs, pipeline expansion, and developing affordable therapeutics. SRSD107 showed promising Phase 1 data with peak FXI activity reductions over 93% and sustained efficacy up to 6 months. financials show R&D expenses of RMB208.5 million in 2023, with later profitability in H1 2025 driven by non-recurring gains from a CRISPR Therapeutics partnership, including US$25 million cash and US$70 million in equity upfront. Post-Series B, Sirius continued raising capital, with a Series B2 in April 2025 at a higher valuation of $253 million and total funding nearing US$150 million including BioTrack Capital. In May 2025, it partnered with CRISPR Therapeutics for SRSD107 co-development on a 50:50 basis, with Sirius handling Greater China commercialization. The company filed for a Hong Kong IPO in 2025, highlighting early-stage pipelines still pre-Phase III, 32 pending patents, and no sustainable product revenue as of then.

Who has invested in Sirius Therapeutics?

5 investors have backed Sirius Therapeutics across its funding rounds, including OrbiMed, Hankang Capital, Creacion Ventures, BioTrack Capital and Delos Capital.

Lead investors include BioTrack Capital and Hankang Capital.


Sirius Therapeutics Investors

Investors in Sirius Therapeutics by funding rounds participated
InvestorHQRoundsRoleFirst check
Creacion VenturesUnited StatesBoston, MA2ParticipantOct 2023
OrbiMedUnited StatesNew York City, NY2ParticipantOct 2023
Hankang CapitalChinaShanghai2LeadOct 2023

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Sirius Therapeutics Competitors

Sirius 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 Sirius 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

Sirius Therapeutics Public Comps

Sirius 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 Sirius Therapeutics

When was Sirius Therapeutics founded?Sirius Therapeutics was founded in 2021.
Where is Sirius Therapeutics headquartered?Sirius Therapeutics is headquartered in San Diego, CA, United States.
Is Sirius Therapeutics publicly listed?No, Sirius Therapeutics is a private, VC-backed company.
How much funding has Sirius Therapeutics raised?Sirius Therapeutics has raised $110M across 2 funding rounds.
What was Sirius Therapeutics' last funding round?Sirius Therapeutics' last funding round was a $50M Series B in May 2025, led by BioTrack Capital.
Who are Sirius Therapeutics' investors?Sirius Therapeutics' investors include Creacion Ventures, OrbiMed, Hankang Capital, Delos Capital and BioTrack Capital.
Which companies are comparable to Sirius Therapeutics?Companies comparable to Sirius Therapeutics include Eli Lilly, Johnson & Johnson, AbbVie, Merck, Biosplice Therapeutics and Biocon Biologics.

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