Natera to Present 12 Datasets Including >50,000 Patients Featuring Signatera™ at the San Antonio Breast Cancer Symposium

Key Terms

cell-free DNA medical

Fragments of DNA that float freely in the bloodstream after being released by dying or damaged cells, like puzzle pieces carried downstream that hint at what’s happening upstream. Investors care because measuring these fragments enables non‑invasive tests — for example to detect cancer, monitor treatment response, check pregnancy health, or spot organ rejection — so advances, approvals, or reimbursement changes can quickly affect companies that develop the tests and related technologies.

circulating tumor DNA medical

Fragments of DNA shed by cancer cells into the bloodstream that act like tiny fingerprints of a tumor; they can be detected with a blood test rather than a biopsy. Investors care because circulating tumor DNA (ctDNA) enables faster, lower-cost ways to detect disease, track treatment response, identify emerging resistance and enroll patients in trials—factors that can materially affect the commercial prospects of diagnostics and therapeutics.

ctDNA medical

Circulating tumor DNA (ctDNA) is tiny fragments of genetic material shed by cancer cells into the bloodstream, like breadcrumbs that can reveal a tumor’s presence and genetic makeup without needing a biopsy. For investors, ctDNA matters because tests and technologies that detect and analyze these fragments can speed diagnosis, track treatment response, and signal relapse, creating commercial opportunities in diagnostics, personalized therapies, and monitoring services.

molecular residual disease medical

Molecular residual disease is the tiny amount of cancer that can remain in the body after treatment and is detectable only by sensitive tests that find cancer DNA or other molecular traces. It matters to investors because these measurements can predict relapse, guide whether additional therapy is needed, and shape the market for diagnostics and drugs—much like finding embers after a fire helps decide if more firefighting is required.

CDK4/6 inhibitor medical

A CDK4/6 inhibitor is a type of cancer drug that blocks two proteins (CDK4 and CDK6) that tell cells to divide, effectively slowing or stopping the growth of tumors. Think of it as cutting power to a photocopier that keeps making cancer cells; that control can shrink tumors or delay progression. For investors, these drugs matter because clinical trial results, regulatory approvals, patent life, safety issues and competition directly affect sales potential and company value.

hazard ratio medical

A hazard ratio is a way scientists compare the chance of something happening over time between two groups, like patients taking different medicines. If the ratio is high, it means one group is more likely to experience the event sooner or more often, which helps determine how effective a treatment is or how risky a situation might be.

poster spotlight technical

A poster spotlight is a highlighted presentation at a scientific or medical conference where a single research poster is given extra attention—often a brief, focused talk or featured display—to draw attendees to important data or findings. For investors, a poster spotlight can act like a preview or quality marker: it signals that researchers or peers consider the data notable, which may influence perceptions of a therapy’s progress, credibility, or commercial potential.

real-world evidence medical

Real-world evidence is information gathered from everyday sources like patient records, insurance claims, or everyday experiences, rather than controlled experiments or clinical trials. It helps investors understand how products or policies perform in real life, providing a more complete picture of their effectiveness and value beyond official tests. This type of evidence can influence decision-making by offering insights based on actual, everyday outcomes.

Signatera Genome demonstrated 100% sensitivity and specificity in detecting breast cancer recurrence in the surveillance setting

AUSTIN, Texas--(BUSINESS WIRE)-- Natera, Inc. (NASDAQ: NTRA), a global leader in cell-free DNA and precision medicine, today announced that at least twelve abstracts highlighting Signatera will be shared at the 2025 San Antonio Breast Cancer Symposium (SABCS), taking place December 9-12.

The presentations encompass aggregated data from more than 50,000 patients in real-world evidence and prospective clinical studies, demonstrating the prognostic and predictive power of Signatera across diverse breast cancer subtypes and settings. These include real-world studies of Signatera adoption and clinical impact at Yale, Houston Methodist and other leading institutions. Additional highlights include:

Signatera Genome study

In a real-world cohort of 227 patients with triple-negative, HR+/HER2- and HER2+ breast cancers, during surveillance Signatera Genome detected recurrence with a sensitivity and specificity of 100%.

• Patients who were Signatera-positive within 3 months of surgery were at a significantly higher risk of distant disease recurrence (HR: 13.1, 95% CI: 1.4-122.1, P = 0.005).
• Signatera positivity at any time post-definitive treatment was associated with significantly worse distant recurrence-free survival (HR: 221.2, 95% CI: 131.0-373.4, P <0.0001).

LEADER trial

This phase 2 randomized study aims to evaluate the efficacy of adding the CDK4/6 inhibitor, ribociclib, to adjuvant endocrine therapy for patients with ER+/HER2- early breast cancer who test Signatera-positive during surveillance.

• Patients with sustained MRD negativity remained disease-free during extended followup (12−month NPV: RFS=99%, DRFS=100%).
• MRD-positive patients initiating ribociclib achieved high rates of ctDNA decrease or clearance, translating to delayed onset of distant recurrence (18.6 vs 5.4 from treatment start).

“We are proud to share our largest dataset for SABCS thus far, featuring the value of Signatera in risk stratification, the early detection of molecular relapse and treatment response monitoring,” said Minetta Liu, M.D., chief medical officer of oncology and early cancer detection at Natera. “The findings from these prospective clinical studies and real-world evidence add important context on how Signatera can provide personalized insights and optimize treatment across all breast cancer subtypes and indications, and the new data with Signatera Genome offer even greater promise for MRD testing.”

The full list of presentations at SABCS includes:

December 10, 4:30 PM CT | RF3-04 (Oral Presentation)
Presenter: Heather A. Parsons
Tumor-informed circulating tumor DNA analysis to assess molecular residual disease for prognosis and prediction of benefit from palbociclib in the PALLAS trial

December 10, 5:00 PM CT | PS2-09-04
Presenter: Julia Foldi
Predicting outcomes for patients with mixed ductal/lobular carcinoma of the breast based on circulating tumor DNA positivity patterns

December 10, 5:00 PM CT | PS2-10-03
Presenter: Devora Isserfoff
Impact of Circulating Tumor DNA (ctDNA) monitoring on Patient Anxiety and Clinician Decision-Making in Early-Stage Breast Cancer (PACE-ctDNA)

December 10, 5:00 PM CT | PS2-08-21
Presenter: Amy J. Xu
Circulating tumor DNA (ctDNA) Dynamics in Early-stage Breast Cancer Patients (pts) with Brain Metastases

December 10, 5:00 PM CT | PS2-08-12
Presenter: Julia Foldi
Age-associated divergence in breast cancer: clinical, molecular, and genomic insights from a large real-world cohort

December 10, 5:00 PM CT | PS2-09-20
Presenter: Daniel Stover
Circulating Tumor DNA Dynamics and Anatomical Patterns of Relapse Following Curative Therapy in Early-Stage Breast Cancer

December 10, 5:00 PM CT | PS2-07-26
Presenter: Wassim McHayleh
Clinical performance of Signatera Genome assay for predicting recurrence in patients with breast cancer

December 11, 7:00 AM CT | PD6-07 (Poster Spotlight)
Presenter: Mark Jesus Magbanua
ctDNA dynamics is most predictive of response in treatment-sensitive response-predictive subtypes of breast cancer: Results from the I-SPY2 trial

December 11, 7:00 AM CT | PD5-01 (Poster Spotlight)
Presenter: Arielle J. Medford
Personalized circulating tumor DNA (ctDNA) testing, intervention, and temporal dynamics in ER+/HER2- early-stage breast cancer (LEADER)

December 11, 7:00 AM CT | PD9-01 (Poster Spotlight)
Presenter: Steffi Oesterreich
Comprehensive Genomic Landscape of Invasive Lobular Carcinoma Reveals Distinct Molecular Subtypes

December 11, 12:30 PM CT | PS3-01-05
Presenter: Banu Arun
Prevalence and Characterization of Germline CDH1 Mutations in a Large Real-World Breast Cancer Cohort

December 11, 5:00 PM CT | PS4-02-25
Presenter: Minhal Zaidi
Single Institution experience of longitudinal post-surgical circulating tumor DNA monitoring in patients with HER2+ breast cancer

About Natera

Natera™ is a global leader in cell-free DNA and genetic testing, dedicated to oncology, women’s health, and organ health. We aim to make personalized genetic testing and diagnostics part of the standard-of-care to protect health and inform earlier, more targeted interventions that help lead to longer, healthier lives. Natera’s tests are supported by more than 325 peer-reviewed publications that demonstrate excellent performance. Natera operates ISO 13485-certified and CAP-accredited laboratories certified under the Clinical Laboratory Improvement Amendments (CLIA) in Austin, Texas, and San Carlos, California. For more information, visit www.natera.com.

Forward-Looking Statements

All statements other than statements of historical facts contained in this press release are forward-looking statements and are not a representation that Natera’s plans, estimates, or expectations will be achieved. These forward-looking statements represent Natera’s expectations as of the date of this press release, and Natera disclaims any obligation to update the forward-looking statements. These forward-looking statements are subject to known and unknown risks and uncertainties that may cause actual results to differ materially, including with respect to whether the results of clinical or other studies will support the use of our product offerings, the impact of results of such studies, our expectations of the reliability, accuracy and performance of our tests, or of the benefits of our tests and product offerings to patients, providers and payers. Additional risks and uncertainties are discussed in greater detail in “Risk Factors” in Natera’s recent filings on Forms 10-K and 10-Q and in other filings Natera makes with the SEC from time to time. These documents are available at www.natera.com/investors and www.sec.gov.

View source version on businesswire.com: https://www.businesswire.com/news/home/20251202820466/en/

Investor Relations: Mike Brophy, CFO, Natera, Inc., investor@natera.com

Media: Lesley Bogdanow, VP of Corporate Communications, Natera, Inc., pr@natera.com

Source: Natera, Inc.