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

Treeline Biosciences Overview

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

United StatesBoston, MA

Status

Privately held

Customer focus

B2B

Revenue model

Licensing

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

Treeline Biosciences funding rounds
DateStageInvestorsRaisedDeal Summary
Sep 2025Series AAI 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$200MTreeline 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 2024Undisclosed stage-$421MTreeline Biosciences, a Watertown, Massachusetts-based biotechnology company founded in 2021 by Josh Bilenker and Jeff Engelman, focuses on oncology drug discovery using leading-edge computational tools to develop small molecules, degraders, glues, and targeted therapy ADCs for cancer, neurological, and autoimmune diseases. The company announced the initiation of Phase 1 clinical trials for three programs: internally discovered BCL6 degrader TLN-121 and pan-KRAS inhibitor TLN-372 for specific cancers including lymphoma and KRAS-mutated tumors, and in-licensed EZH2 inhibitor TLN-254 from Jiangsu Hengrui Pharmaceuticals for T cell lymphomas. This coincided with the close of a $200 million Series A extension around early September to October 2024, bringing total funding to $1.1 billion from investors including ARCH Venture Partners, OrbiMed, GV, KKR, AI Life Sciences, Casdin Capital, Fidelity, and others. Prior funding included an initial Series A of approximately $200-212 million in April 2021 and a subsequent undisclosed round of about $422 million in 2024, with some sources listing a Series B of $173 million on October 2, 2024, though primary announcements emphasize the Series A extension. The funding supports building a robust team for scaled invention, rigorous testing, and advancing multiple parallel discovery programs with complementary timelines and risks. Treeline emphasizes ligandability and therapeutic index in program selection, allowing them to terminate underperforming assets. The company plans Phase 1 data readouts next year, three more programs to late preclinical soon, and a fourth to clinic early next year. Investors back a long-term vision to create an enduring biopharma company targeting challenging oncology targets like BCL6, KRAS, and EZH2.
Oct 2022Series AKKR (lead); Access Industries; Rock Springs Capital; OrbiMed; ARCH Venture Partners$261MTreeline Biosciences, founded in early 2021 in Watertown, Massachusetts, by biotech veterans Joshua Bilenker (CEO, ex-Loxo Oncology) and Jeffrey Engelman (CSO, ex-Novartis), develops oncology therapies targeting challenging cancer mechanisms with innovative approaches. The company maintained a low profile initially, announcing in 2022 the inclusion of KKR with a significant capital commitment and raising over $261 million per securities filings around November 2022, led by KKR's Health Care Strategic Growth Fund II, with participation from Rock Springs Capital, ARCH Venture Partners, OrbiMed, Access Industries, and others. This brought total funding at the time to around $473 million. The 2022 Series A tranche supported pipeline development, including internally discovered programs like a pan-KRAS inhibitor (TLN-372) for KRAS-altered solid tumors and a BCL6 degrader (TLN-121) for lymphoma, now in Phase 1 trials. Treeline later licensed an EZH2 inhibitor (TLN-254) from Hengrui Pharmaceuticals in 2023 for $11 million upfront plus up to $695 million in milestones. Treeline continued aggressive fundraising, adding a $200 million Series A extension in September 2025 (post-money valuation $1.83 billion, price per share $8.61), a $422 million Series B in October 2024, and other tranches, reaching $1.1 billion total from investors including GV, T. Rowe Price, Casdin Capital, Aisling Capital, Fidelity, Ajax Health/Zeus, and Exor. This funding enabled clinical advancement and recruitment of top scientists for difficult targets like KRAS and BCL6, positioning Treeline to compete with players like Bristol Myers Squibb, Amgen, Astellas, and BridgeBio in oncology. The company's strategy emphasizes rigorous testing and parallel discovery to build an enduring biopharma.
Apr 2021Series AARCH Venture Partners (lead); GV (lead); OrbiMed (lead); Casdin Capital; Access Industries; Ajax Health$212MTreeline 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

Investors in Treeline Biosciences by funding rounds participated
InvestorHQRoundsRoleFirst check
OrbiMedUnited StatesNew York City, NY3LeadApr 2021
ARCH Venture PartnersUnited StatesChicago, IL3LeadApr 2021
KKRUnited StatesNew York City, NY2LeadOct 2022
GVUnited StatesSan Francisco, CA2LeadApr 2021
Casdin CapitalUnited StatesNew York City, NY2ParticipantApr 2021
Access IndustriesUnited StatesNew York City, NY2ParticipantApr 2021
Rock Springs CapitalUnited StatesBaltimore, MD2ParticipantOct 2022
Ajax HealthUnited StatesSan Francisco, CA2ParticipantApr 2021
FidelityUnited StatesBoston, MA1ParticipantSep 2025
T. Rowe PriceUnited StatesBaltimore, MD1ParticipantSep 2025
ExorItalyVerona1ParticipantSep 2025

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Acquisitions by Treeline Biosciences

Treeline Biosciences has acquired 1 company to date.

Last acquisition by Treeline Biosciences was on June 7th 2026. Treeline Biosciences acquired Standard BioTools for $460M.


Latest Acquisitions by Treeline Biosciences

Standard BioTools
Description
Standard BioTools Inc develops, manufactures, and sells technologies that help biomedical researchers in their search for developing medicines faster. Its tools provide insights into health and disease using proprietary mass cytometry and microfluidics technologies, which serve applications in proteomics and genomics, respectively. Its segments include Proteomics and Genomics. It generates maximum revenue from the Proteomics segment. Geographically, it derives a majority of its revenue from the Americas.
HQ CountryUnited States
HQ City
-
Deal Date7 Jun 2026
Valuation$460M
EV/Revenue
EV/EBITDA

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Treeline Biosciences Competitors

Treeline Biosciences 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 Treeline Biosciences
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

Treeline Biosciences Public Comps

Treeline Biosciences 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 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, Merck, Biosplice Therapeutics and Biocon Biologics.
How many companies has Treeline Biosciences acquired?Treeline Biosciences has acquired 1 company, including Standard BioTools.
What was the largest acquisition by Treeline Biosciences?The $460M acquisition of Standard BioTools in June 2026 is the largest acquisition Treeline Biosciences has made to date.

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