← Quest Diagnostics overview

Quest Diagnostics vs Guardant Health: why the prices moved differently

Weekly · monthly · quarterly news summaries, side by side in time

Quest Diagnostics Incorporated (DGX)

Q3 2026
▲4

Quest raises 2026 outlook on strong Q2 and new test approval

  • New York approval opens Haystack MRD to all 50 states New York State approved Quest's Haystack MRD liquid biopsy test, making it available in all 50 states. This regulatory win expands the market for a high-value cancer test, supporting future revenue growth and lifting DGX shares.

    This is a new regulatory milestone that directly expands Quest's addressable market for a premium test.

  • Attunio Health picks Quest as national lab backbone Attunio Health selected Quest as its national lab partner for precision psychiatry, with at-home blood collection via Getlabs. This adds new test volume from a growing mental health platform, a modest but positive demand driver for DGX.

    A new partnership that adds incremental testing volume and shows Quest winning new business.

  • Q2 beat and raised 2026 guidance boost outlook Quest reported Q2 revenue up 10.2% to $3.04B and adjusted EPS of $3.12, beating estimates, and raised full-year 2026 revenue and EPS guidance. Strong organic growth and a tax benefit drove the increase, signaling momentum.

    The guidance raise and earnings beat are the core fundamental drivers of the stock's recent move.

  • Analysts raise fair value and price targets after Q2 Analysts lifted Quest's fair value estimate to $239.38 from $223.44, with price targets mostly $245–$265. The upgrades reflect the earnings beat and higher guidance, though UBS stayed Neutral on margin concerns, a mild counterweight.

    Analyst upgrades following the earnings beat reinforce the positive sentiment and help explain the stock's rise.

July 2026
▲4

Quest raises 2026 outlook on strong Q2 and new test approval

  • New York approval opens Haystack MRD to all 50 states New York State approved Quest's Haystack MRD liquid biopsy test, making it available in all 50 states. This regulatory win expands the market for a high-value cancer test, supporting future revenue growth and lifting DGX shares.

    This is a new regulatory milestone that directly expands Quest's addressable market for a premium test.

  • Attunio Health picks Quest as national lab backbone Attunio Health selected Quest as its national lab partner for precision psychiatry, with at-home blood collection via Getlabs. This adds new test volume from a growing mental health platform, a modest but positive demand driver for DGX.

    A new partnership that adds incremental testing volume and shows Quest winning new business.

  • Q2 beat and raised 2026 guidance boost outlook Quest reported Q2 revenue up 10.2% to $3.04B and adjusted EPS of $3.12, beating estimates, and raised full-year 2026 revenue and EPS guidance. Strong organic growth and a tax benefit drove the increase, signaling momentum.

    The guidance raise and earnings beat are the core fundamental drivers of the stock's recent move.

  • Analysts raise fair value and price targets after Q2 Analysts lifted Quest's fair value estimate to $239.38 from $223.44, with price targets mostly $245–$265. The upgrades reflect the earnings beat and higher guidance, though UBS stayed Neutral on margin concerns, a mild counterweight.

    Analyst upgrades following the earnings beat reinforce the positive sentiment and help explain the stock's rise.

Latest
▲4

Quest raises 2026 outlook on strong Q2 and new test approval

  • New York approval opens Haystack MRD to all 50 states New York State approved Quest's Haystack MRD liquid biopsy test, making it available in all 50 states. This regulatory win expands the market for a high-value cancer test, supporting future revenue growth and lifting DGX shares.

    This is a new regulatory milestone that directly expands Quest's addressable market for a premium test.

  • Attunio Health picks Quest as national lab backbone Attunio Health selected Quest as its national lab partner for precision psychiatry, with at-home blood collection via Getlabs. This adds new test volume from a growing mental health platform, a modest but positive demand driver for DGX.

    A new partnership that adds incremental testing volume and shows Quest winning new business.

  • Q2 beat and raised 2026 guidance boost outlook Quest reported Q2 revenue up 10.2% to $3.04B and adjusted EPS of $3.12, beating estimates, and raised full-year 2026 revenue and EPS guidance. Strong organic growth and a tax benefit drove the increase, signaling momentum.

    The guidance raise and earnings beat are the core fundamental drivers of the stock's recent move.

  • Analysts raise fair value and price targets after Q2 Analysts lifted Quest's fair value estimate to $239.38 from $223.44, with price targets mostly $245–$265. The upgrades reflect the earnings beat and higher guidance, though UBS stayed Neutral on margin concerns, a mild counterweight.

    Analyst upgrades following the earnings beat reinforce the positive sentiment and help explain the stock's rise.

Guardant Health Inc (GH)

Q3 2026
▲2▼1

Guardant's Shield Wins Insurance Coverage and Sales Surge, Lifting Guidance

  • UnitedHealth covers Shield blood test UnitedHealth, America's largest commercial insurer, became the first big insurer to cover Guardant's Shield blood test for colorectal cancer screening. Over 100 million people can now get it. More covered patients means more test sales, pushing revenue and the stock up.

    This is a major new demand catalyst that directly expands the market for Guardant's key screening product.

  • Q2 revenue jumps 44%, guidance raised Guardant reported second-quarter revenue of $335 million, up 44% from a year ago, and raised its full-year 2026 revenue outlook to $1.34–$1.36 billion. Oncology test volume grew 63% and Shield screening revenue more than tripled. Strong growth signals the business is scaling, which supports a higher stock price.

    This is the latest hard financial evidence of accelerating demand and management confidence, a core driver of the stock.

  • Quest's Haystack MRD test goes nationwide Quest Diagnostics won New York approval for its Haystack MRD liquid biopsy test, clearing it for use in all 50 states. This puts a large, well-funded competitor directly into cancer monitoring, where Guardant also plays. More competition could pressure Guardant's pricing and market share, a real counterweight.

    It is a new competitive threat that could limit Guardant's growth in the cancer-monitoring market.

July 2026
▲2▼1

Guardant's Shield Wins Insurance Coverage and Sales Surge, Lifting Guidance

  • UnitedHealth covers Shield blood test UnitedHealth, America's largest commercial insurer, became the first big insurer to cover Guardant's Shield blood test for colorectal cancer screening. Over 100 million people can now get it. More covered patients means more test sales, pushing revenue and the stock up.

    This is a major new demand catalyst that directly expands the market for Guardant's key screening product.

  • Q2 revenue jumps 44%, guidance raised Guardant reported second-quarter revenue of $335 million, up 44% from a year ago, and raised its full-year 2026 revenue outlook to $1.34–$1.36 billion. Oncology test volume grew 63% and Shield screening revenue more than tripled. Strong growth signals the business is scaling, which supports a higher stock price.

    This is the latest hard financial evidence of accelerating demand and management confidence, a core driver of the stock.

  • Quest's Haystack MRD test goes nationwide Quest Diagnostics won New York approval for its Haystack MRD liquid biopsy test, clearing it for use in all 50 states. This puts a large, well-funded competitor directly into cancer monitoring, where Guardant also plays. More competition could pressure Guardant's pricing and market share, a real counterweight.

    It is a new competitive threat that could limit Guardant's growth in the cancer-monitoring market.

Latest
▲2▼1

Guardant's Shield Wins Insurance Coverage and Sales Surge, Lifting Guidance

  • UnitedHealth covers Shield blood test UnitedHealth, America's largest commercial insurer, became the first big insurer to cover Guardant's Shield blood test for colorectal cancer screening. Over 100 million people can now get it. More covered patients means more test sales, pushing revenue and the stock up.

    This is a major new demand catalyst that directly expands the market for Guardant's key screening product.

  • Q2 revenue jumps 44%, guidance raised Guardant reported second-quarter revenue of $335 million, up 44% from a year ago, and raised its full-year 2026 revenue outlook to $1.34–$1.36 billion. Oncology test volume grew 63% and Shield screening revenue more than tripled. Strong growth signals the business is scaling, which supports a higher stock price.

    This is the latest hard financial evidence of accelerating demand and management confidence, a core driver of the stock.

  • Quest's Haystack MRD test goes nationwide Quest Diagnostics won New York approval for its Haystack MRD liquid biopsy test, clearing it for use in all 50 states. This puts a large, well-funded competitor directly into cancer monitoring, where Guardant also plays. More competition could pressure Guardant's pricing and market share, a real counterweight.

    It is a new competitive threat that could limit Guardant's growth in the cancer-monitoring market.

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