Astria Therapeutics Acquisition, Valuation, Funding & Investors

Astria Therapeutics was acquired by BioCryst Pharma for $700M in October 2025.

Astria Therapeutics acquisition price

$700M

Acquired by BioCryst Pharma · Oct 2025

Cumulative funding Astria Therapeutics raised

$41M

across 2 funding rounds

Key investors in Astria Therapeutics

  • SV Health Investors
  • Advanced Technology Ventures
  • Clarus Ventures
  • MedImmune Ventures
  • Lightstone Ventures

Astria Therapeutics Overview

About Astria Therapeutics

Astria Therapeutics Inc is a biopharmaceutical company engaged to bring life-changing therapies to patients and families affected by rare and niche allergic and immunological diseases. Its program, STAR-0215, is a monoclonal antibody inhibitor of plasma kallikrein in preclinical development for the treatment of hereditary angioedema. Their second product candidate is STAR-0310, a monoclonal antibody OX40 antagonist that is in preclinical development for the treatment of atopic dermatitis, or AD, an immune disorder associated with loss of skin barrier function and itching.


Founded

2008

HQ

United StatesCambridge

Status

Acquired

Customer focus

B2C

Revenue model

Product sales

Valuation

$700M (acquired Oct 2025)

Astria Therapeutics Acquisition

Astria Therapeutics was acquired by BioCryst Pharma for $700M on 14 October 2025.

Before the acquisition Astria Therapeutics had raised $41M across 2 funding rounds.

BioCryst Pharmaceuticals completed its acquisition of Astria Therapeutics in January 2026 for approximately $700 million in enterprise value, initially announced in October 2025. Astria is a biopharmaceutical company developing navenibart (STAR-0215), a late-stage monoclonal antibody inhibitor of plasma kallikrein for hereditary angioedema (HAE), a rare disorder causing potentially life-threatening tissue swelling episodes. The deal values Astria at $13 per share in an all-cash and stock transaction, representing a 53% premium over Astria's closing price on October 13, 2025, with Astria stockholders receiving $8.55 in cash and 0.59 BioCryst shares per Astria share and owning approximately 15% of the combined entity. The acquisition strengthens BioCryst's leadership in HAE and provides a complementary late-stage product candidate to its marketed drug Orladeyo, which generated $437.6 million in 2024 sales with BioCryst projecting the HAE portfolio to reach $1 billion in revenue by 2029 and $1.8 billion by 2033. NaveniBart offers infrequent, pain-free dosing and a known mechanism of action compared to existing HAE treatments, positioning it as a potential injectable of choice for patients. BioCryst financed the cash portion through $396.6 million drawn from a $550 million strategic financing facility managed by Blackstone and used available cash, while issuing approximately 37.3 million shares to Astria equity holders. The transaction also includes Astria's early-stage atopic dermatitis program STAR-0310, for which BioCryst plans to pursue strategic alternatives as it does not align with the company's rare disease focus. Astria CEO Jill Milne joined the BioCryst board of directors upon closing.

Astria Therapeutics acquisition details
AcquirerDateTypePrice
14 Oct 2025Strategic M&A$700M

Astria Therapeutics Funding History

Astria Therapeutics has raised a total of $41M across 2 funding rounds, plus 1 secondary share sale.

Astria Therapeutics' first fundraising round was a $9M Series A in February 2013. The most recent completed round was a $32M Series B in November 2013.

Astria Therapeutics funding rounds

Astria Therapeutics funding rounds
DateStageInvestorsRaised
Mar 2015Secondary-$12M
Nov 2013Series BLightstone Ventures (lead); SV Health Investors; Clarus Ventures; MedImmune Ventures; Advanced Technology Ventures$32M
Feb 2013Series ASV Health Investors; Clarus Ventures; MedImmune Ventures; Advanced Technology Ventures$9M

Who has invested in Astria Therapeutics?

5 investors have backed Astria Therapeutics across its funding rounds, including SV Health Investors, Advanced Technology Ventures, Clarus Ventures, MedImmune Ventures and Lightstone Ventures.

Lead investors include Lightstone Ventures.


Astria Therapeutics Investors

Investors in Astria Therapeutics by funding rounds participated
InvestorHQRoundsRoleFirst check
SV Health InvestorsUnited StatesBoston, MA2ParticipantFeb 2013
Clarus VenturesUnited StatesUnited States2ParticipantFeb 2013
MedImmune VenturesUnited StatesWashington, DC2ParticipantFeb 2013

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Acquisitions by Astria Therapeutics

Astria Therapeutics has acquired 1 company to date.

Last acquisition by Astria Therapeutics was on January 29th 2021. Astria Therapeutics acquired Quellis Biosciences for undisclosed valuation.


Latest Acquisitions by Astria Therapeutics

Quellis Biosciences
Description
Quellis Biosciences is a Boston-based clinical-stage biopharmaceutical company advancing monoclonal antibody therapies for rare diseases including primary sclerosing cholangitis and systemic sclerosis. The firm's lead asset, QLS899, a best-in-class anti-TWEAK antibody, completed Phase II dosing in 2023 showing reduced inflammation markers. Quellis partners with CROs for global trials and holds orphan drug designations from the FDA and EMA. Headquartered in Cambridge, Massachusetts, it focuses on underserved patient populations with high unmet needs.
HQ CountryUnited States
HQ City
Philadelphia, PA
Deal Date29 Jan 2021
Valuationundisclosed
EV/Revenue
EV/EBITDA

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Astria Therapeutics Competitors

Astria Therapeutics competitors include listed companies like Ironwood Pharmaceuticals, Nuvectis Pharma, Zevra Therapeutics and CHO Pharma, and private ones like AdvanCell and Angiocrine Bioscience.

Public and private companies comparable to Astria Therapeutics
CompanyHQStatusRevenueEBITDAValuationRevenue Multiple
AdvanCellAustraliaSydneyPrivate--$700M-
Ironwood PharmaceuticalsUnited StatesUnited StatesPublicly listed$296M$101M$699M2.4x
Nuvectis PharmaUnited StatesUnited StatesPublicly listed-($28M)$698M-
Zevra TherapeuticsUnited StatesUnited StatesPublicly listed$106M$92M$703M3.5x
Angiocrine BioscienceUnited StatesNew York City, NYPrivate--$697M-
CHO PharmaTaiwanTaiwanPublicly listed$45K($9M)$705M-

Astria Therapeutics Public Comps

Astria Therapeutics is no longer listed, but its public comps include Ironwood Pharmaceuticals, Nuvectis Pharma, Zevra Therapeutics, CHO Pharma, Sagimet Biosciences, SK Chemicals, Genfit, XOMA Royalty, Tempo Scan Pacific and Monopar Therapeutics.

Last FYEV/RevenueEV/EBITDA
RevenueEBITDALast FYLTM2027ELast FYLTM2027E
Ironwood Pharmaceuticals$296M$101M3.4x2.4x10.1x3.6x
Nuvectis Pharma-($28M)--(24.5x)(23.3x)
Zevra Therapeutics$106M$92M4.5x3.5x5.3x9.5x
CHO Pharma$45K($9M)14338.3x-(68.6x)-
Sagimet Biosciences-($57M)--(8.0x)-
SK Chemicals$1.7B$168M1.0x0.9x10.5x10.0x
Genfit$75M($98M)9.9x7.9x(7.7x)52.1x
XOMA Royalty$52M$11M14.4x14.4x65.7x65.7x

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Common questions about Astria Therapeutics

When was Astria Therapeutics founded?Astria Therapeutics was founded in 2008.
Where is Astria Therapeutics headquartered?Astria Therapeutics is headquartered in Cambridge, United States.
Is Astria Therapeutics publicly listed?No, Astria Therapeutics was acquired by BioCryst Pharma in October 2025.
Who acquired Astria Therapeutics?Astria Therapeutics was acquired by BioCryst Pharma in October 2025.
How much was Astria Therapeutics acquired for?Astria Therapeutics was acquired for $700M in October 2025.
How much funding has Astria Therapeutics raised?Astria Therapeutics has raised $41M across 2 funding rounds.
What was Astria Therapeutics' last funding round?Astria Therapeutics' last funding round was a $32M Series B in November 2013, led by Lightstone Ventures.
Who are Astria Therapeutics' investors?Astria Therapeutics' investors include SV Health Investors, Clarus Ventures, MedImmune Ventures, Advanced Technology Ventures and Lightstone Ventures.
Which companies are comparable to Astria Therapeutics?Companies comparable to Astria Therapeutics include AdvanCell, Ironwood Pharmaceuticals, Nuvectis Pharma, Zevra Therapeutics, Angiocrine Bioscience and CHO Pharma.
How many companies has Astria Therapeutics acquired?Astria Therapeutics has acquired 1 company, including Quellis Biosciences.

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