BillionToOne is a hypergrowth diagnostics company with 64% revenue growth, a wide moat and an elite Rule of 40 score, but it trades at 76.3x forward earnings, 1.0% above the analyst target, with heavy insider selling just ahead of earnings on 2026-11-04.
Thesis pillars
- Wide Moat Strong Piotroski→Stable
- Hypergrowth Elite Rule Of 40→Stable
- Rich Valuation At Target→Stable
- +2 more pillars — see the Why tab for full reasoning
Pillars as of Nov 1, 2026, based on the 10-K filed Mar 11, 2026
BillionToOne, Inc. (BLLN) Stock Analysis
Breakout setup
Healthcare · Diagnostics & Research
Hold if already holding. Not a fresh buy at $113.89, but acceptable to hold if already in. Reasons: Concentration risk — Customer: third-party payors; Analyst target reached - limited upside remaining.
BillionToOne develops molecular diagnostic tests using its single-molecule sequencing platform, commercializing the UNITY prenatal test portfolio (launched 2019) and Northstar oncology tests for therapy selection and response monitoring (launched 2023). Third-party... Read more
Hold if already holding. Not a fresh buy at $113.89, but acceptable to hold if already in. Reasons: Concentration risk — Customer: third-party payors; Analyst target reached - limited upside remaining. Chart setup: Golden cross, above all MAs, RSI 69, MACD bullish. Maintain position. Not compelling to add more. Score 6.1/10, moderate confidence.
Passes 6/8 gates (positive momentum, no SEC red flags, news boost analyst 0.50, earnings proximity no date, semi cycle peak clear, materials cycle peak clear). Fails on favorable risk/reward ratio. Suitability: moderate.
About BillionToOne, Inc.
About BillionToOne, Inc.
BillionToOne launched UNITY Fetal Risk Screen in 2019—the first NIPT to assess fetal risk for recessive conditions such as sickle cell disease and cystic fibrosis from a maternal blood draw without requiring a paternal sample—and entered oncology in January 2023 with Northstar Select, an ultrasensitive liquid biopsy for stage III/IV cancer therapy selection. Third-party payors represented more than 90% of the company's revenue in 2025 and 2024. The company was founded in 2016 and received its first commercial test sample in 2019.
BillionToOne earns revenue when third-party payors reimburse for molecular diagnostic tests ordered by obstetricians and oncologists. The UNITY prenatal portfolio covers recessive conditions, chromosomal aneuploidies, 22q11.2 microdeletion, fetal RhD status, and red blood cell antigens; UNITY Fetal Antigen NIPT is described as the only commercially available test for fetal antigen screening in the United States. The Northstar oncology portfolio includes Northstar Select for therapy selection and Northstar Response for methylation-based tumor burden monitoring; more than 95% of oncologists ordering the company's tests in 2025 used both products in tandem. Reimbursement coverage is uneven: Northstar Select is broadly covered by Medicare but narrowly by commercial insurers (limited to specific indications such as lung cancer), while Northstar Response is covered by neither Medicare nor most commercial insurers. Prenatal tests are processed at a Union City laboratory enrolled as a Medicaid provider in over 40 states.
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The Centers for Medicare & Medicaid Services (CMS) sets reimbursement rates annually through the Clinical Laboratory Fee Schedule (CLFS); PAMA-driven rate reductions—suspended since 2021 but the company notes the reporting requirement has been delayed most recently until 2026—may reduce Medicare reimbursement when eventually implemented. Because many commercial insurers and state Medicaid plans set rates as a percentage of Medicare CLFS amounts, a CMS rate cut would have cascading effects across payors. Approximately half of all U.S. births involve Medicaid beneficiaries, making state Medicaid coverage decisions particularly load-bearing for the prenatal franchise revenue base.
See also: Healthcare · Diagnostics & Research
From BillionToOne, Inc.'s most recent 10-K filing, extracted June 9, 2026.
Recent developments
updated Nov 5, 2026Recent Developments — BillionToOne, Inc.
Latest news
- NEWS BTIG Reiterates Buy on BillionToOne, Maintains $130 Price Target — benzinga Nov 5, 2026 positive
- NEWS BillionToOne to Participate in Two Upcoming Investor Conferences - Yahoo Finance — Yahoo Finance Oct 27, 2026 neutral
- NEWS BillionToOne (NasdaqGS:BLLN) Stock Forecast & Analyst Predictions - Simply Wall St — Simply Wall St Oct 27, 2026 neutral
- NEWS Billiontoone (NASDAQ:BLLN) Stock Price Down 4.6% - Here's What Happened - MarketBeat — MarketBeat Sep 30, 2026 negative
- NEWS Billiontoone (NASDAQ:BLLN) Stock Price Down 4.6% - Here's What Happened - marketbeat.com — marketbeat.com Sep 30, 2026 negative
Latest item Nov 5, 2026 · Generated 2026-11-05T11:39:29Z.
Upcoming dated catalysts
Thesis
Key Metrics
Quality Signals
Options Flow
Concentration Risks(10-K Item 1A)
- HIGHCustomerthird-party payors10-K Item 1A: 'Reimbursement from third-party payors for our tests represented more than 90% of our revenue for each of the years ended December 31, 2025 and 2024'
Model-generated analysis — not investment advice. Not a registered investment advisor. Past performance does not guarantee future results. How we score · Editorial policy
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Rating Breakdown
2 floor-breakers·1 ceiling hit
Priced at a premium — multiples above sector norms. Needs delivery on growth + margins to justify.static
Technicals below the gate floor. Component breakdown shows what dragged the score down.static
Price Targets
Position Sizing
Risk Alerts
Earnings
Verdict History
Frequently Asked Questions
Hold if already holding. Not a fresh buy at $113.89, but acceptable to hold if already in. Reasons: Concentration risk — Customer: third-party payors; Analyst target reached - limited upside remaining. Chart setup: Golden cross, above all MAs, RSI 69, MACD bullish. Maintain position. Not compelling to add more. Analyst target $112.23 reached (−1.5%), stop $105.92 (−7.5%), A.R:R -0.1:1. Score 6.1/10, moderate confidence.
Analyst target $112.23 reached (−1.5% from $113.89); no take-profit level is published. Analyst target $112.23 reached (−1.5%), stop $105.92 (−7.5%), A.R:R -0.1:1. Stop-loss: $105.92.
Concentration risk — Customer: third-party payors; Analyst target reached - limited upside remaining; Expensive valuation.
BillionToOne, Inc. trades at a P/E of 180.8 (forward 76.7). TrendMatrix value score: 3.1/10. Verdict: Hold.
14 analysts rate BLLN, with a consensus score of 4.3/5. 7 analysts publish price targets averaging $129.
What does BillionToOne, Inc. do?BillionToOne develops molecular diagnostic tests using its single-molecule sequencing platform, commercializing the...
BillionToOne develops molecular diagnostic tests using its single-molecule sequencing platform, commercializing the UNITY prenatal test portfolio (launched 2019) and Northstar oncology tests for therapy selection and response monitoring (launched 2023). Third-party payors—including Medicare, Medicaid, and commercial insurers—represented more than 90% of revenue in 2025 and 2024. The company describes UNITY Fetal Antigen NIPT as the only commercially available test for fetal antigen screening in the United States.