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- Third Arc Bio
Third Arc Bio Funding, Investors & Competitors
Third Arc Bio has raised $217M across 2 funding rounds, most recently a $52M Series A in February 2026.
Last Third Arc Bio funding round
$52M
Series A · Feb 2026
Cumulative funding Third Arc Bio raised
$217M
across 2 funding rounds
Key investors in Third Arc Bio
Hillhouse Investment
Andreessen Horowitz
T. Rowe Price
Goldman Sachs Asset Management
Cormorant Asset Management
Omega Funds
Biotechnology Value Fund
AbbVie
Third Arc Bio Overview
About Third Arc Bio
Third Arc Bio is a clinical-stage biotechnology company based in Spring House, Pennsylvania, developing multifunctional antibodies that generate immune synapses to precisely activate or inhibit T cells. The company focuses on oncology and immunology & inflammation, with platforms including ARCStim for solid tumors and ARCTag for precision immune regulation. Its lead asset, ARC101, is a bispecific T cell engager targeting CLDN6 that is in Phase 1 dose escalation for advanced solid tumors.
Founded
2022
HQ
Website
Status
Privately held
Customer focus
B2B
Revenue model
Licensing
Sectors
Third Arc Bio Funding History
Third Arc Bio has raised a total of $217M across 2 funding rounds.
Third Arc Bio's first fundraising round was a $165M Series A in July 2024. The most recent completed round was a $52M Series A in February 2026.
Third Arc Bio funding rounds
| Date | Stage | Investors | Raised | Deal Summary |
|---|---|---|---|---|
| Feb 2026 | Series A | Andreessen Horowitz (lead); Alderline Group; Marshall Wace; AbbVie; Biotechnology Value Fund; Aberdeen Investments; Hillhouse Investment; T. Rowe Price; Omega Funds; Lakefront Biotherapeutics; Goldman Sachs Asset Management | $52M | Third Arc Bio, a clinical-stage biotechnology company based in Spring House, Pennsylvania, develops multifunctional antibodies that generate immune synapses to precisely activate or inhibit T cells, focusing on oncology and immunology & inflammation (I&I) with platforms including ARCStim for solid tumors and ARCTag for precision immune regulation. Launched in 2022 with seed financing from Omega Funds, the company has assembled a team with drug discovery expertise and a pipeline of multispecific antibodies. Its lead asset, ARC101, is a bispecific T cell engager targeting CLDN6 in Phase 1 dose escalation for advanced solid tumors. On February 4, 2026, Third Arc Bio closed a $52 million Series A extension financing, led by new investor Andreessen Horowitz (a16z) with participation from founding investor Omega Funds and others including Goldman Sachs Alternatives, BVF Partners LP, abrdn, T. Rowe Price Associates, Marshall Wace, Hillhouse Investment, Galapagos NV, AbbVie Ventures, and Alderline Group. This extension adds to a previously announced $165 million Series A, bringing total Series A funding to $217 million. As part of the deal, a16z General Partner Jorge Conde joined the board of directors. Proceeds will accelerate the I&I portfolio into first-in-human studies and advance additional oncology programs into the clinic, enabling parallel-tracking to validate platforms, generate proof-of-concept data, and deliver therapies for unmet needs in oncology and immunology. |
| Jul 2024 | Series A | Cormorant Asset Management (lead); Hillhouse Investment (lead); Vida Ventures (lead) | $165M | Third Arc Bio is a Boston-based biotech company developing multifunctional antibodies that generate immune synapses to precisely activate or inhibit T cells, targeting solid tumors and inflammatory & immunology (I&I) diseases through a solid tumor synergy platform and a novel I&I platform for tissue-specific immune regulation. The company was formed in 2022 with seed financing from Omega Funds and launched publicly with an oversubscribed $165 million Series A round on July 16, 2024, raising funds to advance multiple programs into clinical trials starting early 2025. The round was led by Vida Ventures, co-led by Cormorant Asset Management and Hillhouse Investment, with participation from Omega Funds, Goldman Sachs Alternatives, BVF Partners LP, T. Rowe Price Associates, Janus Henderson Investors, abrdn, Marshall Wace, Foresite Capital, Logos Capital, Freepoint Capital Group, and AbbVie Ventures. Leadership includes CEO Peter F. Lebowitz, MD, PhD; Chief Scientific Officer Sanjaya Singh, PhD, former global head of Janssen Biotherapeutics at Johnson & Johnson and key developer of AbbVie's Skyrizi; and COO Joe Erhardt, PhD, former global head of oncology discovery at J&J. The team has collectively commercialized 19 drugs. The post-money valuation for the Series A was $305.43 million at a $2.10 price per share, with total funding reaching $197.75 million including prior seed. The substantial financing reflects strong investor confidence in Third Arc Bio's discovery engine and pipeline poised for IND filings in 2025, aiming to deliver best-in-class biologics leveraging T cell biology for oncology and autoimmunity unmet needs. The round positions the company for clinical inflection points amid competition in T cell engagers and precision immunology therapies. |
Who has invested in Third Arc Bio?
13 investors have backed Third Arc Bio across its funding rounds, including Hillhouse Investment, Andreessen Horowitz, T. Rowe Price, Goldman Sachs Asset Management, Cormorant Asset Management and Omega Funds.
Lead investors include Andreessen Horowitz, Cormorant Asset Management, Hillhouse Investment and Vida Ventures.
Third Arc Bio Investors
| Investor | HQ | Rounds | Role | First check |
|---|---|---|---|---|
| 2 | Lead | Jul 2024 | ||
| 1 | Lead | Jul 2024 | ||
| 1 | Participant | Feb 2026 | ||
| 1 | Participant | Feb 2026 | ||
| 1 | Participant | Feb 2026 | ||
| 1 | Participant | Feb 2026 | ||
| 1 | Participant | Feb 2026 | ||
| 1 | Participant | Feb 2026 | ||
| 1 | Lead | Feb 2026 | ||
| 1 | Participant | Feb 2026 | ||
| 1 | Participant | Feb 2026 | ||
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Benchmark 350K+ Funding Rounds and Disclosed VC Valuation Multiples
Sign up to see data on 350K+ funding rounds and disclosed revenue and EBITDA valuation multiples, from seed, through growth stage, to pre-IPO.
Start Free TrialThird Arc Bio Competitors
Third Arc Bio competitors include listed companies like Eli Lilly, Johnson & Johnson, AbbVie and Merck, and private ones like Biosplice Therapeutics and Biocon Biologics.
| Company | HQ | Status | Revenue | EBITDA | Valuation | Revenue Multiple |
|---|---|---|---|---|---|---|
| Publicly listed | $65B | $28B | $1.0T | 13.1x | ||
| Publicly listed | $94B | $40B | $651B | 6.8x | ||
| Publicly listed | $61B | $17B | $467B | 8.1x | ||
| Publicly listed | $65B | $28B | $363B | 6.2x | ||
| Private | - | - | $12B | - | ||
| Private | $1.1B | - | $4.5B | 4.2x |
Third Arc Bio Public Comps
Third Arc Bio 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 FY | EV/Revenue | EV/EBITDA | ||||||
|---|---|---|---|---|---|---|---|---|
| Revenue | EBITDA | Last FY | LTM | 2027E | Last FY | LTM | 2027E | |
| $65B | $28B | 16.5x | 13.1x | 38.7x | 27.0x | |||
| $94B | $40B | 7.2x | 6.8x | 17.0x | 18.3x | |||
| $61B | $17B | 8.7x | 8.1x | 30.6x | 17.6x | |||
| $65B | $28B | 6.3x | 6.2x | 14.7x | 21.0x | |||
| $77B | $26B | 5.0x | 4.9x | 14.6x | 12.4x | |||
| $57B | $22B | 5.5x | 5.5x | 14.2x | 13.3x | |||
| $59B | $19B | 4.8x | 4.5x | 14.6x | 12.7x | |||
| $37B | $17B | 6.8x | 6.5x | 14.8x | 14.4x | |||
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Common questions about Third Arc Bio
| When was Third Arc Bio founded? | Third Arc Bio was founded in 2022. |
| Where is Third Arc Bio headquartered? | Third Arc Bio is headquartered in United States. |
| Is Third Arc Bio publicly listed? | No, Third Arc Bio is a private, VC-backed company. |
| How much funding has Third Arc Bio raised? | Third Arc Bio has raised $217M across 2 funding rounds. |
| What was Third Arc Bio's last funding round? | Third Arc Bio's last funding round was a $52M Series A in February 2026, led by Andreessen Horowitz. |
| Who are Third Arc Bio's investors? | Third Arc Bio's investors include Hillhouse Investment, Vida Ventures, Alderline Group, Marshall Wace, AbbVie, Biotechnology Value Fund, Aberdeen Investments, T. Rowe Price, Andreessen Horowitz, Omega Funds and 3 others. |
| Which companies are comparable to Third Arc Bio? | Companies comparable to Third Arc Bio include Eli Lilly, Johnson & Johnson, AbbVie, Merck, Biosplice Therapeutics and Biocon Biologics. |
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