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Treeline Biosciences, Inc.

Updated Oct 27, 2026·Latest SEC filing Sep 4, 2025·Suggest an edit

About Treeline Biosciences

Treeline Biosciences is a private company based in Watertown, Massachusetts, incorporated in 2021 in Delaware. It has reported $1,094,815,863 raised in four offerings on Form D since April 2021.

Funding Rounds (SEC Form D)

First saleFiled with SECAmount soldInvestorsAvg. checkTermsFiling
Aug 21, 2025Sep 4, 2025$200,099,964of $249.9M target22$9.0MEquity, OptionsRule 506(b)Form D ↗
Oct 2, 2024Oct 17, 2024$421,779,808fully sold43$9.8MEquityRule 506(b)Form D ↗
Sep 26, 2022Oct 11, 2022$261,266,523of $269.3M target44$5.9MEquityRule 506(b)Form D ↗
Apr 9, 2021Apr 30, 2021$211,669,568of $220.0M target34$6.2MEquityRule 506(b)Form D ↗
Total, four offerings$1,094,815,863

First sale is the date the first investor in the offering committed to invest. Companies must file Form D within 15 days of that date, so filing dates run later.

Leadership Team

Executive officers and directors listed on Treeline Biosciences's Form D filed Sep 4, 2025.

SE
Steven Elms
Director
KB
DB
David Bonita
Director
JB
Joshua Bilenker
Executive officer, director and promoter
JE
Jeffrey Engelman
Executive officer, director and promoter
AK
Aftab Kherani
Director
Also a director at Summus and XII Medical.
AS
Ali Satvat
Director
Avi Naider
Avi Naider
Director
Also a board member at ILiAD.
DS

Sources

  1. SECTreeline Biosciences, Inc. filing history