Vertex Eyes Expansion Beyond Cystic Fibrosis with Planned $10B Crinetics Buyout

Vertex Pharmaceuticals has agreed to acquire Crinetics Pharmaceuticals for $10 billion cash, the companies said, in a deal that would expand the buyer’s rare disease portfolio beyond its anchor indication of cystic fibrosis (CF), by adding an approved treatment and a pipeline anchored by two Phase III candidates, all predicted to generate more than $5 billion in annual revenue.

Based in San Diego, Crinetics focuses on discovering, developing, and commercializing therapeutics for endocrine diseases. The company’s first marketed drug Palsonify® (paltusotine), an oral SST2 agonist, was approved by the FDA in September as the first and to date only once-daily oral therapy for adults with acromegaly, a debilitating condition which affects an estimated 20,000 Americans. Palsonify won European Commission approval in April and is under review by regulators elsewhere in the world.

Palsonify has enjoyed rapid uptake among acromegaly patients, with Crinetics reporting the drug generated net product revenue of $10.3 million during the first quarter, with 232 patients enrolling for treatment. Approximately 70% of patients treated with Palsonify at the end of Q1 were on reimbursed therapy—reflecting payers increasingly agreeing to cover the treatment, according to the company.

Within the first two quarters of its U.S. launch, Palsonify was prescribed by 263 unique healthcare providers.

Under its generic name paltusotine, the drug is in Phase III study for a second indication of carcinoid syndrome, a rare condition resulting from neuroendocrine tumors.

‘Excellent strategic fit’

“Crinetics is an excellent strategic fit for Vertex, with its focus on serious diseases in specialty markets with significant unmet need, well-understood causal human biology, and potentially best-in-class medicines that could deliver transformative benefit to patients,” Reshma Kewalramani, MD, Vertex’s CEO and president, said in a statement. “We believe Vertex can build on the strong momentum of the Palsonify launch by applying our experience in commercializing medicines for rare genetic diseases.”

Crinetics investors agreed, roaring their approval of the pending acquisition as the company’s shares all but doubled in early trading Tuesday, zooming 99% to $83.54 as of 10:28 am ET from yesterday’s closing price of $42.03. Vertex shares dipped 2% to $516.48 from $529.59 at Monday’s closing bell.

Also in late-stage development is Crinetics’ lead pipeline candidate atumelnant, an oral adrenocorticotropic hormone (ACTH) antagonist now under development for congenital adrenal hyperplasia (CAH) and ACTH-dependent Cushing’s syndrome.

In classic CAH, a rare chronic genetic disease with 17,000 addressable patients in the U.S., atumelnant is in a pair of clinical trials. One is a Phase III study in adults with the most common cause of the disease, 21-hydroxylase deficiency (21-OHD). The study’s estimated primary completion date is May 2027 (NCT07144163). The other trial is a Phase II/III study in children ages one to <18, which has an estimated primary completion date of March 2030 (NCT07159841).

Earlier Phase II studies of atumelnant showed that patients treated with the therapy achieved near normalization of excess androgen levels on physiologic replacement doses of glucocorticoids—a therapeutic profile that Crinetics has said positions atumelnant to become the leading treatment for people with CAH.

Atumelnant (formerly CRN04894) is also being developed for ACTH-dependent Cushing’s syndrome, and is under study in a Phase Ib/IIa open-label, multiple-ascending dose exploratory study (NCT05804669) designed to evaluate safety, tolerability, pharmacokinetics (PK), and pharmacodynamic biomarker responses associated with the treatment.

‘Significant potential’

“We are also excited by the significant potential of atumelnant to transform the treatment landscape for CAH, setting a new standard of care where patients do not have to choose between managing their excess adrenal androgens and enduring the side effects of high-dose steroids,” Kewalramani said.

One analyst said a Vertex buyout would be good news for Crinetics.

“This is a solid outcome for CRNX, given stock pressure from the near-term Palsonify launch (generally slow and steady launch but (+) [positive] progress by CRNX so far) and the fact that key Phase III catalyst for CAH isn’t until late 2027/28,” Jefferies equity analyst Dennis Ding wrote today in a research note.

In a regulatory filing yesterday, Crinetix shared an email it sent to employees, stating: “We have always been confident in the ability of Crinetics to achieve our plan and were not actively looking to sell the company when Vertex approached us. However, after careful consideration, our board unanimously determined that the transaction is in the best interests of our shareholders.”

Crinetics’ pipeline of more than 10 disclosed candidates includes:

• CRN09682, a Phase I nonpeptide drug conjugate candidate being developed to treat somatostatin receptor 2 (SST2) expressing neuroendocrine tumors and other SST2 expressing solid tumors.
• Discovery-phase preclinical programs focused on endocrine targets that include thyroid stimulating hormone (TSH), parathyroid hormone (PTH), somatostatin receptor 3 (SST3), growth hormone (GH), glucagon-like peptide 1 (GLP-1), and glucose-dependent insulinotropic polypeptide (GIP), as well as GPCR-targeted oncology indications.

Vertex said the deal was expected to contribute immediately to revenue growth via the ongoing launch of Palsonify, which the company says has blockbuster (greater than $1 billion in annual sales) potential in acromegaly. Longer term, Vertex says, atumelnant could also generate multiple billions of dollars in CAH, with additional revenue potential in Cushing’s syndrome.

$5B revenue forecast

At peak year, Palsonify and atumelnant could deliver more than $5 billion in combined annual revenue, Vertex said, and thus contribute toward its goal of delivering sustained double-digit revenue growth, plus industry leading operating margins. The transaction is expected to add to non-GAAP operating income as of 2029.

Jefferies analyst Ding commented that atumelnant in CAH is expected to generate the largest share of the projected $5 billion, as in $2 billion to $3 billion, plus another $1 billion to $2 billion for Cushing’s syndrome–with the remaining $1 billion to be generated by Palsonify in acromegaly.

Scotiabank analyst Louise Chen told Reuters: “The deal ​adds a fifth vertical, endocrinology, which helps diversify VRTX’s concentration in CF.”

That concentration has proven lucrative for Vertex: During Q1, CF treatments generated $2.915 billion in total revenues, 98% of the company’s total revenue of $2.987 billion.

Vertex has agreed to acquire all outstanding shares of Crinetics common stock for $85 per share cash, in a deal valued at $8.8 billion net of estimated cash acquired. Vertex said it expects to finance the acquisition using a combination of cash on hand and debt, supported by $4.5 billion of fully committed bridge financing from Bank of America and Morgan Stanley Senior Funding.

Vertex finished the first quarter with cash, cash equivalents, and total marketable securities of $13 billion, up from $12.3 billion as of December 31, 2025. The company attributed the increase primarily due to cash flows from operating activities, partially offset by repurchases of Vertex’s common stock.

The transaction is expected to close in the third quarter subject to customary closing conditions, including receipt of regulatory approvals and approval by Crinetics shareholders.

“Nearly 18 years ago, we founded Crinetics with a clear goal of transforming the lives of patients living with endocrine-related diseases. Today marks a historic milestone as we embark on this next chapter with Vertex,” stated R. Scott Struthers, PhD, Crinetics’ co-founder and CEO. “Vertex’s global infrastructure and commercial footprint will serve to amplify the reach of our science and allow us to maximize the impact of Palsonify, atumelnant and our pipeline.”