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- Treeline Biosciences
Treeline Biosciences Funding, Investors & Competitors
Treeline Biosciences has raised $1.1B across 4 funding rounds, most recently a $200M Series A in September 2025.
Last Treeline Biosciences funding round
$200M
Series A · Sep 2025
Cumulative funding Treeline Biosciences raised
$1.1B
across 4 funding rounds
Key investors in Treeline Biosciences
OrbiMed
ARCH Venture Partners
GV
KKR
Casdin Capital
Rock Springs Capital
Access Industries
Ajax Health
About Treeline Biosciences
Treeline Biosciences is a Stamford, Connecticut-headquartered biotechnology company developing precision oncology medicines using single-cell multi-omics analysis. It targets tumor microenvironment vulnerabilities in solid cancers like pancreatic and glioblastoma through degraders and bispecific antibodies. Founded in 2021, the firm leverages proprietary spatial transcriptomics data to nominate novel targets and advance candidates into IND-enabling studies.
Founded
2021
HQ
Website
Status
Privately held
Customer focus
B2B
Revenue model
Licensing
Sectors
Treeline Biosciences Funding History
Treeline Biosciences has raised a total of $1.1B across 4 funding rounds.
Treeline Biosciences' first fundraising round was a $212M Series A in April 2021. The most recent completed round was a $200M Series A in September 2025.
Treeline Biosciences funding rounds
| Date | Stage | Investors | Raised | Deal Summary |
|---|---|---|---|---|
| Sep 2025 | Series A | AI Life Sciences Investments LLC (lead); KKR; Fidelity; GV; Casdin Capital; T. Rowe Price; Exor; Rock Springs Capital; OrbiMed; Ajax Health; Aisling Capital; ARCH Venture Partners | $200M | Treeline Biosciences, a Watertown, Massachusetts-based stealth biotech founded in early 2021, emerged publicly in September 2025, announcing a $200 million Series A extension that brought total funding to approximately $1.1 billion. The extension was led by AI Life Sciences Investments LLC (an affiliate of Access Industries) with participation from ARCH Venture Partners, OrbiMed, GV, KKR, T. Rowe Price Associates, Ajax Health/Zeus, Casdin Capital, Fidelity Management & Research Company, Aisling Capital, Rock Springs Capital, and Exor. Prior raises included $200 million at launch in 2021 and a quiet $421.8 million round in October 2024, with earlier filings showing over $261 million by 2022. The funding supports Treeline's ambition to build a durable biopharma company focused on oncology, neurological, and autoimmune diseases using computational tools for drug discovery. The company disclosed its first three clinical programs: TLN-121 (internal BCL6 degrader for Phase 1 lymphoma trials), TLN-372 (internal pan-KRAS inhibitor for Phase 1 KRAS-altered solid tumors), and TLN-254 (EZH2 inhibitor licensed from Hengrui Pharmaceuticals for $11 million upfront plus up to $695 million milestones, also in Phase 1 lymphoma after prior Phase 2 testing). A fourth undisclosed program is on track for an IND submission in early 2026, with three more entering IND-enabling studies post-Phase 1 data expected in 2026. Treeline's platform emphasizes small molecules, degraders, glues, and targeted therapy ADCs with selective payloads. Co-founder and CEO Josh Bilenker, formerly of Loxo Oncology (acquired by Eli Lilly for $8 billion), highlighted the funding's role in recruiting talent and advancing challenging targets like BCL6 and KRAS against competitors including Bristol Myers Squibb, Amgen, Astellas, and BridgeBio. |
| Oct 2024 | Undisclosed stage | - | $422M | Treeline Biosciences disclosed an equity financing of USD421.779808 million in a Form D filed with the US Securities and Exchange Commission on October 17, 2024. The filing reported that the full offering amount had been sold, with no remaining securities available under that notice. It identified October 2 as the date of first sale, which is distinct from the public filing date used for this event. The company classified the securities as equity and said the offering was not connected with a business combination. Treeline was established in 2021 by Joshua Bilenker and Jeffrey Engelman to develop medicines against difficult biological targets, initially in cancer. Its research organisation combines biology, chemistry, protein science and computational approaches. KKR had led an expansion of its financing in 2022; the 2024 notice does not independently identify every subscriber. This financing predates the separate USD200 million extension and clinical programme announcement in September 2025. |
| Oct 2022 | Series A | KKR (lead); Access Industries; Rock Springs Capital; OrbiMed; ARCH Venture Partners | $261M | Treeline Biosciences announced an expansion of its Series A investor syndicate in October 2022, led by a significant capital commitment from KKR’s Health Care Strategic Growth Fund II. Other participants named by the company included Rock Springs Capital, ARCH Venture Partners, GV, OrbiMed, Access Industries, T. Rowe Price advised funds and accounts, Ajax Health/Zeus, Casdin Capital and Aisling Capital. The financing supported a long-term research programme aimed at creating medicines for cancer and other serious diseases. At that time, Treeline employed more than 130 people across San Diego, Stamford and Watertown, as well as staff working elsewhere. Its internal research team combined biology, chemistry, protein sciences and computation. The founders described a portfolio of parallel discovery programmes, with resources available for exploratory work and replacement of unsuccessful projects. The announcement concerned the existing Series A financing and did not announce the clinical programmes or separate capital raise subsequently disclosed in 2025. |
| Apr 2021 | Series A | ARCH Venture Partners (lead); GV (lead); OrbiMed (lead); Casdin Capital; Access Industries; Ajax Health | $212M | Treeline Biosciences launched in April 2021 with a $212 million Series A round led by ARCH Venture Partners, GV, and OrbiMed, as disclosed in an SEC Form D filing, with founders Josh Bilenker and Jeffrey Engelman aiming to build a toolbox for difficult-to-drug cancer targets. The round amount was approximately $212 million, with the company seeking up to $220 million total. Subsequent funding included a Series A-II in October 2022, a $421.78 million Series B on October 17, 2024, and a $200 million Series A extension on September 3, 2025, bringing total funding to around $895-1100 million across multiple rounds. The investors in the 2021 round matched the query: ARCH Venture Partners, GV (Google Ventures), OrbiMed, with later participation from Access Industries, Ajax Health, Casdin Capital, and others in follow-on rounds. Treeline focuses on oncology drug discovery, advancing programs like BCL6 degrader TLN-121, EZH2 inhibitor TLN-254, and pan-KRAS inhibitor TLN-372 into phase 1 trials by 2025. |
Who has invested in Treeline Biosciences?
13 investors have backed Treeline Biosciences across its funding rounds, including OrbiMed, ARCH Venture Partners, GV, KKR, Casdin Capital and Rock Springs Capital.
Lead investors include AI Life Sciences Investments LLC, KKR, ARCH Venture Partners, GV and OrbiMed.
Treeline Biosciences Investors
| Investor | HQ | Rounds | Role | First check |
|---|---|---|---|---|
| 3 | Lead | Apr 2021 | ||
| 3 | Lead | Apr 2021 | ||
| 2 | Lead | Oct 2022 | ||
| 2 | Lead | Apr 2021 | ||
| 2 | Participant | Apr 2021 | ||
| 2 | Participant | Apr 2021 | ||
| 2 | Participant | Oct 2022 | ||
| 2 | Participant | Apr 2021 | ||
| 1 | Participant | Sep 2025 | ||
| 1 | Participant | Sep 2025 | ||
| 1 | Participant | Sep 2025 | ||
This data is available for Pro users. Sign up to see all 13 Treeline Biosciences investors. Start Free Trial | ||||
Benchmark 350K+ Funding Rounds and Disclosed VC Valuation Multiples
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Start Free TrialTreeline Biosciences Competitors
Treeline Biosciences competitors include listed companies like Eli Lilly, Johnson & Johnson, AbbVie and Roche, and private ones like Biosplice Therapeutics and Intas Pharmaceuticals.
| Company | HQ | Status | Revenue | EBITDA | Valuation | Revenue Multiple |
|---|---|---|---|---|---|---|
| Publicly listed | $65B | $28B | $1.2T | 14.3x | ||
| Publicly listed | $94B | $40B | $665B | 6.9x | ||
| Publicly listed | $61B | $17B | $515B | 8.8x | ||
| Publicly listed | $78B | $26B | $382B | 5.3x | ||
| Private | - | - | $12B | - | ||
| Private | $2B | - | $8.5B | - |
Treeline Biosciences Public Comps
Treeline Biosciences is still privately-owned, but its public comps include Eli Lilly, Johnson & Johnson, AbbVie, Roche, Merck, Novartis, AstraZeneca, Amgen, Gilead Sciences and Novo Nordisk.
| Last FY | EV/Revenue | EV/EBITDA | ||||||
|---|---|---|---|---|---|---|---|---|
| Revenue | EBITDA | Last FY | LTM | 2027E | Last FY | LTM | 2027E | |
| $65B | $28B | 19.2x | 14.3x | 45.1x | 30.2x | |||
| $94B | $40B | 7.4x | 6.9x | 17.3x | 18.8x | |||
| $61B | $17B | 9.6x | 8.8x | 33.7x | 18.6x | |||
| $78B | $26B | 5.3x | 5.3x | 15.7x | 13.3x | |||
| $65B | $28B | 6.2x | 6.1x | 14.5x | 22.9x | |||
| $57B | $22B | 6.1x | 6.1x | 15.9x | 14.8x | |||
| $59B | $19B | 5.4x | 5.1x | 16.5x | 14.2x | |||
| $37B | $17B | 7.9x | 7.4x | 17.3x | 16.5x | |||
This data is available for Pro users. Sign up to see all Treeline Biosciences competitors and their valuation data. Start Free Trial | ||||||||
Common questions about Treeline Biosciences
| When was Treeline Biosciences founded? | Treeline Biosciences was founded in 2021. |
| Where is Treeline Biosciences headquartered? | Treeline Biosciences is headquartered in Boston, MA, United States. |
| Is Treeline Biosciences publicly listed? | No, Treeline Biosciences is a private, VC-backed company. |
| How much funding has Treeline Biosciences raised? | Treeline Biosciences has raised $1.1B across 4 funding rounds. |
| What was Treeline Biosciences' last funding round? | Treeline Biosciences' last funding round was a $200M Series A in September 2025, led by AI Life Sciences Investments LLC. |
| Who are Treeline Biosciences' investors? | Treeline Biosciences' investors include OrbiMed, ARCH Venture Partners, KKR, GV, Casdin Capital, Access Industries, Rock Springs Capital, Ajax Health, Fidelity, T. Rowe Price and 3 others. |
| Which companies are comparable to Treeline Biosciences? | Companies comparable to Treeline Biosciences include Eli Lilly, Johnson & Johnson, AbbVie, Roche, Biosplice Therapeutics and Intas Pharmaceuticals. |
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