Ampersand Biomedicines Funding, Investors & Competitors

Ampersand Biomedicines has raised $115M across 2 funding rounds, most recently a $65M Series B in March 2025.

Last Ampersand Biomedicines funding round

$65M

Series B · Mar 2025

Cumulative funding Ampersand Biomedicines raised

$115M

across 2 funding rounds

Key investors in Ampersand Biomedicines

Ampersand Biomedicines Overview

About Ampersand Biomedicines

Ampersand Biomedicines is a Boston-headquartered biotech firm that engineers programmable biologics using its AND Platform for precise disease targeting. The computational system identifies tissue-specific addresses to conjugate antibodies with payloads, creating AND-Body therapeutics for oncology and autoimmune conditions. Ampersand advances candidates through preclinical studies in collaboration with academic labs.


Founded

2020

HQ

United StatesBoston, MA

Status

Privately held

Customer focus

B2B

Revenue model

Product sales

Ampersand Biomedicines Funding History

Ampersand Biomedicines has raised a total of $115M across 2 funding rounds.

Ampersand Biomedicines' first fundraising round was a $50M undisclosed-stage round in March 2023. The most recent completed round was a $65M Series B in March 2025.

Ampersand Biomedicines funding rounds

Ampersand Biomedicines funding rounds
DateStageInvestorsRaisedDeal Summary
Mar 2025Series BFlagship Pioneering; Eli Lilly$65MAmpersand Biomedicines, a Boston-based biotech spun out from Flagship Pioneering, develops smarter biologic medicines using its proprietary Address, Navigate, Design (AND) Platform. This computationally powered platform creates AND-Body Therapeutics designed to localize precisely at disease sites, engage targets conditionally, and minimize off-target effects, addressing key challenges in drug delivery for immunology, oncology, and obesity. On March 19, 2025, Ampersand announced a $65 million Series B funding round led by founder Flagship Pioneering and new investor Eli Lilly & Company, along with undisclosed others. This marks the company's first external VC financing since its 2023 launch with $50 million from Flagship to build its initial pipeline. The proceeds will advance two wholly owned lead programs—one in immuno-inflammation and one in immuno-oncology—into IND-enabling studies later in 2025, while fueling platform development. Ampersand has secured two discovery partnerships in obesity, including one with Pfizer since November prior to the round and a second recently initiated via Flagship's Pioneering Medicines. CEO Jason Gardner highlighted the funding as validation of the platform's potential, with Lilly's investment following a review of the AND technology, though no partnership was confirmed. The company positions its tech for broad pharma collaborations by enhancing existing molecules' potency and specificity through machine learning and multi-omics data. As a preclinical-stage platform company, Ampersand focuses on programmable biologics for high-unmet-need areas like cancer, inflammation, and metabolic diseases, competing in the growing AI-driven drug discovery space dominated by Flagship's ecosystem.
Mar 2023Undisclosed stageFlagship Pioneering (lead)$50MAmpersand Biomedicines is a biotechnology company founded by Flagship Pioneering, emerging from stealth in March 2023 with $50 million in initial funding to advance its Address, Navigate, Design (AND) Platform for creating programmable medicines that act selectively at disease sites, combining localizers and therapeutics like proteins, small molecules, or oligonucleotides to improve safety and efficacy over traditional drugs. The platform enables tissue-selective AND-Body therapeutics for areas including immuno-oncology, immuno-inflammation, and obesity, with the company positioned to pursue partnerships with big pharma. The March 7, 2023 launch financing led solely by Flagship Pioneering, described as a commitment to build the platform and initial pipeline across disease areas. Traction includes two discovery-stage collaborations: one with Pioneering Medicines (Flagship's in-house unit) and another with Pfizer via a Flagship alliance started in 2023, both targeting obesity through tissue-selective metabolic pathways. The company plans to advance wholly owned assets in immuno-oncology and immuno-inflammation to preclinical IND-enabling studies. A later Series B round in 2025 raised $65 million led by Flagship Pioneering with new investor Eli Lilly, funding pipeline progression. Ampersand differentiates in the competitive programmable biologics space by computational drug design for precise localization, avoiding off-target effects, and has expanded its team and board amid partnerships.

Who has invested in Ampersand Biomedicines?

2 investors have backed Ampersand Biomedicines across its funding rounds, including Flagship Pioneering and Eli Lilly.

Lead investors include Flagship Pioneering.


Ampersand Biomedicines Investors

Investors in Ampersand Biomedicines by funding rounds participated
InvestorHQRoundsRoleFirst check

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Acquisitions by Ampersand Biomedicines

Ampersand Biomedicines has acquired 1 company to date.

Last acquisition by Ampersand Biomedicines was on January 3rd 2024. Ampersand Biomedicines acquired AbCheck for $6M.


Latest Acquisitions by Ampersand Biomedicines

AbCheck
Description
AbCheck is a biotechnology company headquartered in Prague, Czech Republic, that specializes in discovering and optimizing fully human therapeutic antibodies using its proprietary Ylanthia platform. This technology generates diverse immune libraries from convalescent patients, enabling rapid identification of Fab, scFv, and VHH antibody domains for various therapeutic formats. Founded in 2009 as a spin-out from Affimed Therapeutics, AbCheck operates as a wholly owned subsidiary of Affimed GmbH based in Heidelberg, Germany. The company delivers drug candidates through discovery collaborations and strategic partnerships with pharmaceutical firms, offering flexible terms such as royalty-free licenses. AbCheck supports partners in advancing antibodies toward clinical development across oncology, infectious diseases, and autoimmune indications.
HQ CountryCzech Republic
HQ City
-
Deal Date3 Jan 2024
Valuation$6M
EV/Revenue
EV/EBITDA

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Ampersand Biomedicines Competitors

Ampersand Biomedicines 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 Ampersand Biomedicines
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

Ampersand Biomedicines Public Comps

Ampersand Biomedicines 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 Ampersand Biomedicines

When was Ampersand Biomedicines founded?Ampersand Biomedicines was founded in 2020.
Where is Ampersand Biomedicines headquartered?Ampersand Biomedicines is headquartered in Boston, MA, United States.
Is Ampersand Biomedicines publicly listed?No, Ampersand Biomedicines is a private, VC-backed company.
How much funding has Ampersand Biomedicines raised?Ampersand Biomedicines has raised $115M across 2 funding rounds.
What was Ampersand Biomedicines' last funding round?Ampersand Biomedicines' last funding round was a $65M Series B in March 2025.
Who are Ampersand Biomedicines' investors?Ampersand Biomedicines' investors include Flagship Pioneering and Eli Lilly.
Which companies are comparable to Ampersand Biomedicines?Companies comparable to Ampersand Biomedicines include Eli Lilly, Johnson & Johnson, AbbVie, Merck, Biosplice Therapeutics and Biocon Biologics.
How many companies has Ampersand Biomedicines acquired?Ampersand Biomedicines has acquired 1 company, including AbCheck.
What was the largest acquisition by Ampersand Biomedicines?The $6M acquisition of AbCheck in January 2024 is the largest acquisition Ampersand Biomedicines has made to date.

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