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-$422MTreeline 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 2022Series AKKR (lead); Access Industries; Rock Springs Capital; OrbiMed; ARCH Venture Partners$261MTreeline 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 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

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

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 Trial

Treeline 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.

Public and private companies comparable to Treeline Biosciences
CompanyHQStatusRevenueEBITDAValuationRevenue Multiple
Eli LillyUnited StatesUnited StatesPublicly listed$65B$28B$1.2T14.3x
Johnson & JohnsonUnited StatesUnited StatesPublicly listed$94B$40B$665B6.9x
AbbVieUnited StatesUnited StatesPublicly listed$61B$17B$515B8.8x
RocheSwitzerlandSwitzerlandPublicly listed$78B$26B$382B5.3x
Biosplice TherapeuticsUnited StatesSan Diego, CAPrivate--$12B-
Intas PharmaceuticalsIndiaAhmedabadPrivate$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 FYEV/RevenueEV/EBITDA
RevenueEBITDALast FYLTM2027ELast FYLTM2027E
Eli Lilly$65B$28B19.2x14.3x45.1x30.2x
Johnson & Johnson$94B$40B7.4x6.9x17.3x18.8x
AbbVie$61B$17B9.6x8.8x33.7x18.6x
Roche$78B$26B5.3x5.3x15.7x13.3x
Merck$65B$28B6.2x6.1x14.5x22.9x
Novartis$57B$22B6.1x6.1x15.9x14.8x
AstraZeneca$59B$19B5.4x5.1x16.5x14.2x
Amgen$37B$17B7.9x7.4x17.3x16.5x

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.

See companies similar to Treeline Biosciences

Start Your
Free Trial Today

Try Multiples for free for 3 days. Got questions or need a demo? Schedule a call with us below.

Start Trial