Thesis

Street consensus, scenarios, merits, risks, and invalidation triggers

AI-assisted
Thesis Summary

Quest entered the second half of 2026 with strong operating momentum: second-quarter revenue rose 10.2%, organic growth was 10.0%, and adjusted diluted EPS increased 19.1%. Management raised full-year revenue and adjusted-EPS guidance, while advanced diagnostics and consumer channels continued expanding. Offsetting these positives, revenue per requisition declined 2.8% and adjusted operating margin narrowed to 16.5% from 16.9%. The shares closed at $242.76 on August 28, close to their $247.19 52-week high.

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This section is the 12-month view: analyst targets and the probability-weighted scenarios built from them. The intrinsic value at the top of this page answers a different question: what the business is worth today.
Street view · analyst 12-month targets15 analysts · as of 18 Aug 2026
Low · most bearish analyst$204.00
Mean target$245.87
High · most bullish analyst$265.00
Street targets sit above today's price; our intrinsic value sits below it. Different horizons, different questions.
Our research · scenarios, merits, risks, and invalidation triggersResearch as of 2 Sep 2026
Scenarios · 12-month scenario targetsAnchored at research date
Bear CaseDownside scenario
$204.0018%

Persistent reimbursement or mix pressure deepens the decline in revenue per requisition, while integration and operating costs prevent volume growth from translating into margin expansion. Performance falling below the lower ends of the raised revenue or adjusted-EPS guidance would materially weaken the thesis.

Base CaseCentral scenario
$245.8758%
Matches the consensus mean

Quest delivers within its raised 2026 guidance, with strong requisition and organic revenue growth offset partly by lower revenue per requisition and modest margin pressure. This preserves earnings growth but offers a balanced risk-reward profile from the August 28 market price.

Bull CaseUpside scenario
$265.0024%

Sustained organic demand, double-digit growth in advanced diagnostics, continued consumer-channel expansion, and successful commercialization of newer Alzheimer's and oncology tests could keep revenue and adjusted EPS near or above the upper ends of management's 2026 guidance.

Scenarios are anchored to street consensus at the research date, with our probabilities and rationale.

Key Investment Merits
  • Second-quarter 2026 revenue increased 10.2%, including 10.0% organic growth, while adjusted diluted EPS increased 19.1%.
  • Management raised full-year 2026 revenue guidance to $11.95-$12.05 billion and adjusted diluted EPS guidance to $11.05-$11.25.
  • Quest continued expanding higher-complexity diagnostics, including double-digit growth in several advanced-diagnostics areas and planned launches of additional Alzheimer's blood tests.
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Key Investment Risks
  • Second-quarter revenue per requisition declined 2.8%, indicating pricing or mix pressure despite strong volume.
  • Adjusted operating margin declined to 16.5% from 16.9% year over year, showing incomplete conversion of revenue growth into margin expansion.
  • The August 28 closing price of $242.76 was close to the $247.19 52-week high.
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All scenarios are estimates and subject to change. Past performance is not indicative of future results.

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AI-assisted, source-linked narrative; figures from company filings (SEC EDGAR) and market data. Dates shown per section. Not investment advice. Terms of Use.