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Quest Diagnostics is a mature, highly cash-generative leader in the US diagnostic testing market. Its robust national network provides durable scale advantages, supporting consistent free cash flow generation and a reliable, growing dividend. With an implied ~19.4x forward P/E, DGX is positioned as a defensive healthcare compounding asset. Fair value range: low $185, high $268, with mid-point at $226.
Stock analysis

DGX DGX fair value $185–$268

DGX
By StockMarketAgent.AI team· supervised by
分析日: 2026-05-13次回更新: 2026-08-13Methodology v2.5Review: automatedArchetype: Mature dividend
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株価
$190.18
▲ +35.84 (+18.85%)
公正価値
$226
$185–$268
評価
買い
confidence 88/100
上昇余地
+18.9%
upside to fair value
安全余裕率
$192.12
MoS level · 15%
時価総額
$21.1B
P/E fwd 16.3
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§1 エグゼクティブサマリー

  • Fair value range established at $184.66 to $267.84, with a midpoint of $226.02.
  • High OCF to Net Income conversion (1.9x) indicates strong core cash generation.
  • Scale efficiencies largely offset structural PAMA reimbursement cuts.
  • Composite valuation anchored by Free Cash Flow to Firm (40%) and Forward Earnings (40%).
Fair value
$226
Margin of safety
+15.9%
Confidence
88/100
Moat
6.5/10

Educational analysis only — not financial advice. Always do your own due diligence.

$190.18Price
Low $184.66
Mid $226.02
High $267.84

Quest Diagnostics is a mature, highly cash-generative leader in the US diagnostic testing market. Its robust national network provides durable scale advantages, supporting consistent free cash flow generation and a reliable, growing dividend. With an implied ~19.4x forward P/E, DGX is positioned as a defensive healthcare compounding asset.

  • Scale Advantage
    Unmatched national laboratory network lowers per-test processing costs.
  • Switching Costs
    Deep integration with hospital IT systems and payer networks.
  • Bull thesis
    Valuation: Shares are undervalued, supported by a $226.02 composite midpoint tightly aligned with the $223.25 internal valuation anchors.

§2 ベアケース

A combined scenario of PAMA reimbursement cuts and labor inflation tests the margin structure. The model withstands moderate pressure given scale efficiencies, but operating margins structurally compressing below 13.0% would invalidate the current valuation.

このテーゼが崩れる経路

Severe PAMA Reimbursement Reset

· Low

Aggressive legislative changes to PAMA cause unexpected, steep cuts to clinical lab fee schedules, significantly compressing gross margins.

FV impact
-20%
Trigger
1-3 Years

Accelerated Hospital In-sourcing

· Medium

Technological advancements enable hospitals to profitably internalize testing, shrinking the addressable outsourced laboratory market.

FV impact
-15%
Trigger
3-5 Years

Margin Collapse from Labor Inflation

· Medium

Persistent wage inflation for specialized lab technicians outpaces pricing power, structurally shifting operating margins below 13.0%.

FV impact
-10%
Trigger
1-2 Years
監視すべき早期警戒シグナル
指標現在トリガーしきい値
OCF/NI conversion ratio dropping below 1.5x.MonitorDeterioration versus the report thesis
Operating margins structurally compressing below 13.0%.MonitorDeterioration versus the report thesis
Loss of major national payer contracts.MonitorDeterioration versus the report thesis
Declining volume in high-margin esoteric testing segments.MonitorDeterioration versus the report thesis
Capital expenditure requirements materially exceeding historical ratios.MonitorDeterioration versus the report thesis

§3 財務履歴

損益計算書 — 直近6期
項目T−0T−1T−2T−3T−4CAGR
期間2021-12-312022-12-312023-12-312024-12-312025-12-31Trend
売上高$10.79B$9.88B$9.25B$9.87B$11.04B+0.6%
売上総利益$4.21B$3.43B$3.05B$3.24B$3.67B-3.4%
営業利益$2.38B$1.43B$1.26B$1.35B$1.56B-10.1%
純利益$2.00B$946.0M$854.0M$871.0M$992.0M-16.0%
EPS (希薄化後)$15.55$7.97$7.49$7.69$8.75-13.4%
EBITDA$3.16B$1.82B$1.73B$1.89B$2.17B-9.0%
研究開発
販管費$1.73B$1.87B$1.64B$1.77B$1.97B+3.3%

品質スコア

OCF / 純利益
1.9×
>1 は利益の質が高いことを示す
会計品質ゲート
Fail
セクター調整後ゲート
ROIC
9.2%
投下資本利益率
セクション 3

Numbers analysis

キャッシュフロー

Cash-flow quality is reflected in the OCFOperating cash flowCash generated from the company's core operations after working-capital changes but before capital expenditures. The first line of the cash-flow statement. / net incomeNet IncomeNet Income is an income-statement line item used to reconcile revenue to operating profit, pre-tax income, net income, or per-share earnings. It should be compared across periods and against peer disclosure conventions., accounting-quality, and ROICROICReturn on invested capital. Operating profit (after tax) divided by invested capital. The single best gauge of capital-efficiency. Spread over WACC = economic value created. rows above.

資本配分

Capital allocation should be evaluated against reinvestment needs, balance-sheet strength, and shareholder returns.

個人サブスクライバー — §4以降11セクション追加

完全な分析を読む — 11セクション追加。

Competitive moat, industry cycle, peer comparison, intrinsic valuation, sensitivity, scenarios, earnings decision tree, position management, investor perspectives, scorecard, and final recommendation.

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FAQ

DGX — frequently asked questions

  1. Based on our latest analysis, DGX looks meaningfully undervalued. The current price is $190 versus a composite fair-value midpoint of $226 (range $185–$268), which implies roughly 18.9% upside to the midpoint.
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