Servier
plans
to pay $2.5 billion to acquire Day One Biopharmaceuticals in a deal that will give it access to rare oncology medicines, including the marketed brain tumor treatment Ojemda.
The French pharma said on Friday it will pay $21.50 a share
$DAWN
in cash, marking a 68% premium over Day One’s Thursday closing price. The California biotech went public in May 2021 at $16 a pop. The deal is slated to close in the second quarter and adds to a string of assets that Servier has
brought in
over the past six months.
The deal marks at least the 10th biopharma acquisition so far this year, according to an
Endpoints News
tracker.
Eli Lilly
,
GSK
and
Gilead
have each forged multibillion-dollar deals this year as they look to expand their pipeline prowess for years to come.
The acquisition is one of the largest deals in Servier’s 72-year history, David Lee, EVP and head of the company’s US unit, told Endpoints in an interview.
Servier will gain “true leadership” in the brain cancer space with the acquisition, Lee said. Both companies have commercial-stage treatments for certain low-grade gliomas, and both medicines were greenlit by the FDA in 2024.
Day One markets
Ojemda
for certain children with relapsed or refractory pediatric low-grade glioma. Ipsen has the ex-US rights. Servier, meanwhile, has
Voranigo
, a medicine for certain patients with grade 2 astrocytoma or oligodendroglioma. That also came via an acquisition, when Servier got hold of certain Agios programs in 2022.
Ojemda reeled in $155.4 million in 2025, and last month Day One
projected
$225 million to $250 million in 2026 sales.
Lee noted Day One was born after the Cancer Moonshot initiative, and “it was really to serve some of these unmet oncology medical needs.” Servier is run by a nonprofit foundation and he said the companies share “common DNA” through a focus on patients and innovation.
In addition to Ojemda, Servier will gain two antibody-drug conjugates, which have been one of the most prized modalities in oncology drug development over the past few years.
Day One got both of its ADCs through deals since the company doesn’t have a research department, CEO Jeremy Bender noted in an interview with Endpoints on the sidelines of the JP Morgan healthcare confab in January.
“We’re just building muscle: building the muscle to continue to address persistent, urgent medical need in oncology,” Bender said in January. At the time, he outlined a vision for potentially building out a research organization, but that evolution was “still a ways out.”
A week prior to the January interview, Day One completed its
$129 million
upfront acquisition of
Mersana Therapeutics
and its ADC called Emi-Le. The treatment candidate is in Phase 1 testing for adenoid cystic carcinoma. Emi-Le and Ojemda should eventually get Day One to $1 billion in revenue, Bender said at the time.
Day One’s other ADC came in a 2024 deal with Shanghai-based
MabCare Therapeutics
. That investigational drug, codenamed
DAY301
, targets PTK7 and is in Phase 1 for certain solid tumors.
Day One has also done collaborations with startups like
Sprint Bioscience
and others.