About Xontogeny
Xontogeny, an accelerator and incubator program founded in 2016, is based in Boston, United States. With a presence in 4 countries, it has supported around 28 startups in sectors like Life Sciences, High Tech. As of Jun 2026, Xontogeny has witnessed 10 portfolio exits. Most notable companies in
its portfolio include Forge Biologics, Astria Therapeutics and Apogee Therapeutics. The program is backed by a team of 18 people who primarily support Series A startups based in United States. Its latest investment was a $20M Series B round in Zucara Therapeutics on Nov 12, 2024 along with Sanofi.
Key Metrics
Founded Year
2016
Location
Boston, United States
Portfolio Companies
Sectors of Investment
Stages of Investment
Series A, Seed & 3 more
Locations of Investment
Xontogeny's List of Top Investments
Xontogeny has a portfolio of 28 companies. Their most notable investments are in Quellis Biosciences and Surf Bio.Their portfolio spans across United States, Canada, China and 1 more locations. They have invested in Life Sciences, High Tech, Consumer and 2 other sectors, across stages such as Series A, Seed and 3 more. Here is the list of top investments by Xontogeny:Developer of gene therapeutic solutions for treating multiple diseases. It has developed gene therapies that aim to help patients suffering from rare diseases. Products include FBX-101 which helps to treat infantile Krabbe diseases, FBX-201 for rare and monogenic diseases, and FBX-301 for rare & cancer diseases.
Key facts about Forge Biologics
- Founded Year: 2020
- Location: Columbus (United States)
- Stage: Acquired
- Total Funding till date: $330M
- Employee Count: 434 as on Apr 30, 2026
- Investors: RA Capital Management, MidCap Financial and 7 Others
- Latest Funding Round: Series C, Sep 12, 2022, $*****
- Highlight: Acquired
Developer of therapeutics for rare diseases. It offers a lead candidate STAR-0215 which is a monoclonal antibody inhibitor of plasma kallikrein for the treatment of hereditary angioedema, and allergic and immunological diseases.
Key facts about Astria Therapeutics
Developer of therapeutics for immunological and inflammatory disorders. The company is advancing a pipeline of product candidates, which includes APG777, for the treatment of immunological, inflammatory disorders, and autoimmune disorders.
Key facts about Apogee Therapeutics
- Founded Year: 2022
- Location: Waltham (United States)
- Stage: Public
- Total Funding till date: $149M
- Employee Count: 305 as on Apr 30, 2026
- Investors: Fairmont, Orbimed and 5 Others
- Latest Funding Round: Series B, Dec 07, 2022, $*****
- Highlight: Public
Developer of cell-based therapeutics for cancer treatment. It offers CAR T-cell therapies which include CD22 CAR T, and Multi-Specific CAR T drug candidates for the treatment of hematological malignancies, and solid tumors.
Key facts about Cargo Therapeutics
- Founded Year: 2021
- Location: San Mateo (United States)
- Stage: Acquired
- Total Funding till date: $200M
- Employee Count: 31 as on Apr 30, 2026
- Investors: Wellington, Piper Sandler and 13 Others
- Latest Funding Round: Series A, Feb 09, 2023, $*****
- Highlight: Acquired
Developer of antibody-based therapeutics for the treatment of cancer. The company's lead candidate, TORL-1-23, is a CLDN6-directed antibody-drug conjugate for patients across multiple cancer types. Also, it is developing a broad pipeline of novel preclinical ADCs and mAb in oncologic indications.
Key facts about TORL BioTherapeutics
- Founded Year: 2019
- Location: Los Angeles (United States)
- Stage: Series C
- Total Funding till date: $412M
- Employee Count: 63 as on Apr 30, 2026
- Investors: Cowen, Bristol-Myers Squibb and 8 Others
- Latest Funding Round: Series C, Oct 07, 2025, $*****
- Highlight: Editors' Pick
Xontogeny's Year-on-Year Investment Trends
Xontogeny has invested in 28 companies over the last 9 years, with an average of 3 new investments annually in the last 5 years. Its most recent first time investment was in Zucara Therapeutics and most recent follow-on round was in CereVasc.Year | No. of Investments | ||
|---|---|---|---|
1st Round | Follow-on | Total | |
2026 (YTD) | 0 | 0 | 0 |
2025 | 0 | 0 | 0 |
2024 | 3 | 1 | 4 |
2023 | 4 | 1 | 5 |
2022 | 4 | 1 | 5 |
2021 | 6 | 1 | 7 |
2020 | 3 | 0 | 3 |
2019 | 0 | 0 | 0 |
2018 | 0 | 0 | 0 |
2017 | 2 | 0 | 2 |
Xontogeny's Investments by Stage
Xontogeny has made 11 investments in Series A stage with an average round size of $55.9M, 7 investments in Seed stage with an average round size of $6.59M, 2 investments in Series B stage with an average round size of $89M, 1 investment in Series C stage with an average round size of $189M and 1 investment in Unattributed stage.Stage of entry | No. of Investments |
|---|---|
Series A | 11 |
Seed | 7 |
Series B | 2 |
Series C | 1 |
Unattributed | 1 |
Note: We have considered here, only first round of investments
Xontogeny's Investments by Sector
Xontogeny has a diverse portfolio, with companies operating in the Life Sciences, High Tech, Sustainability Tech, Consumer and Environment. Notably, it has invested in 27 Enterprise (B2B) companies, 27 Tech companies and 1 Tech hardware company.Sector | No. of Investments |
|---|---|
Life Sciences | 21 |
High Tech | 2 |
Sustainability Tech | 2 |
Consumer | 1 |
Environment | 1 |
Others | 1 |
Note: We have considered here, only first round of investments
Xontogeny's Investments by Geography
Xontogeny has made most investments in United States (20), followed by Canada where it has made 1 investment.Country | No. of Investments |
|---|---|
United States | 20 |
Canada | 1 |
Switzerland | 1 |
Note: We have considered here, only first round of investments
Xontogeny's recent investments
Xontogeny has not made any investment in 2026 so far.Here are the most recent investments by Xontogeny:
Date | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Nov 12, 2024 | Canada | Series B | 9963 | ||
May 13, 2024 | United States | Series B | 1658 | ||
Apr 24, 2024 | United States | Series A | 9517 | [+1] | |
Apr 03, 2024 | Switzerland | Series A | 2605 | [+1] | |
Sep 27, 2023 | United States | Series C | 6833 | [+13] |
IPOs and Publicly Listed companies in Xontogeny's Portfolio
4 of Xontogeny's portfolio companies have become public. Avalyn Pharma got listed on the National Association of Securities Dealers Automated Quotations (NASDAQ), in Apr 2026 at marketcap of $753M and Apogee Therapeutics got listed on the National Association of Securities Dealers Automated Quotations (NASDAQ) at marketcap of $809M.Here are Xontogeny's portfolio companies that went public:
Company | IPO Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Apr 30, 2026 | Sep 27, 2023 | Series C | 4385 | |
Jul 14, 2023 | - | - | 9589 | |
Nov 01, 2021 | - | - | 4181 | |
Jan 26, 2018 | - | - | 2817 |
Acquired companies in Xontogeny's Portfolio
6 companies from Xontogeny's portfolio have been acquired. The most recent acquisition was Surf Bio in Jan 2026 by Halozyme for $*****.Here are Xontogeny's portfolio companies that got acquired most recently:
Company | Acquisition Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Jan 28, 2026 | Apr 12, 2022 | Seed | 2347 | |
Oct 14, 2025 | - | - | 5557 | |
Jul 08, 2025 | Feb 09, 2023 | Series A | 5370 | |
Mar 25, 2024 | - | - | 9381 | |
Nov 13, 2023 | Jul 21, 2020 | Series A | 2809 |
Team profile of Xontogeny
Xontogeny has a team of 18 members including 4 Partners and 2 Principals located in United States. Xontogeny's team does not sit on the board of any company as of now.Here is a list of top team members in Xontogeny:
Name | Designation | Location | Board Memberships | Contact Details |
|---|---|---|---|---|
Partner | New York City | - | - | |
Partner | San Francisco | - | - | |
Partner | Boston | - | - | |
Partner | New York City | - | - | |
Principal | Cambridge | - | - | |
Principal | New York City | - | - |
Co-investors of Xontogeny
Over the past 9 years, 106 investors have co-invested in Xontogeny's portfolio companies. This includes funds and angels.
- Invested before Xontogeny: HHS, F-Prime Capital and 43 others have invested in rounds before Xontogeny. There are 4 companies where HHS has invested before Xontogeny and 1 company where F-Prime Capital has invested before Xontogeny.
- Top Co-investors of Xontogeny: 47 investors entered a company along with Xontogeny. These include investors like Perceptive Advisors (4 companies).
- Invested after Xontogeny: A total of 14 investors have invested in Xontogeny's portfolio after their investments. Top Investors include Perceptive Advisors (3 companies) and Citadel (2 companies).
Recent News related to Xontogeny
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Mercy BioAnalytics Raises $59M in Series B FundingFinSMEs•Sep 03, 2025•Sozo Ventures, American Cancer Society - North Carolina, Bruker, Mercy BioAnalytics and 5 others
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Lexeo Therapeutics Partners with PXV Funds and venBio for Cardiac RNA TherapeuticsGlobeNewswire•Jun 24, 2025•LEXEO Therapeutics, Xontogeny, VenBio
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Zucara Therapeutics Raises $5M in Series B FinancingFinSMEs•May 01, 2025•Zucara Therapeutics, T1D Fund, Xontogeny
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Zucara Therapeutics Raises US$20M in Series B FinancingFinSMEs•Nov 12, 2024•Zucara Therapeutics, Sanofi, Xontogeny
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Startup that aims to revolutionize cataract surgery raises $17.5MThe Business Journals•Apr 29, 2024•Adaptilens, Xontogeny, Pillar VC, and 1 other
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TORL scores $158m in Series B2 to advance ADC cancer therapiesPharmaceutical Technology•Apr 10, 2024•TORL BioTherapeutics, Deep Track Capital, Goldman Sachs, University of California and 9 others
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Addex spinoff Neurosterix debuts with $63m for developing neurological therapiesPharmaceutical Technology•Apr 04, 2024•Neurosterix, Addex Therapeutics, Perceptive Advisors, Acorn Bioventures and 1 other
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Avalyn Pharma Closes $175M Series C FinancingFinSMEs•Sep 28, 2023•Avalyn Pharma, Xontogeny, SR One, Eventide Asset Management and 12 others



