Quest Diagnostics Incorporated· DGX

🇺🇸 US · LargeSP500NYSE

Healthcare Medical - Diagnostics & Research Website

Price: $246.48
Day: -0.39%
Mkt Cap: $27.20B
52W Range: $171.18 – $248.70
Volume: 1.91M
Beta: 0.55

D55D FrameworkQuarterly Data

Holdings Analysis

Insider activity, institutional flows, and fund ownership.

Smart Money: 3.7 / 5 (Bullish), from 3 of 3 components
Institutions Q2 2026: 1,126 institutions hold; 553 added, 354 reduced
Insiders Q3 2026: no purchases, 5 sales ($8.3M)

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Quest Diagnostics Incorporated

DGX|Healthcare|Medical - Diagnostics & Research

Current price: $246

Smart Money

Dimension 5 of 5

Insider selling pace · Q3 2026

0.8x

quarter in progress, filings still arriving

Seller breadth · Q3 2026

3 sellers

vs 3.7 avg per quarter

Institutional net breadth · Q2 2026

+240

674 adding vs 434 reducing

Institutional ownership · Q2 2026

96.1%

1,126 institutions

Insider Selling Pace

Each quarter's selling vs this stock's own trailing 6-quarter average

Light <0.5xRoutineElevated >1.5xHeavy >3xBuying

Institutional Positions

Institutions adding above the line, reducing below, net as a line

NewIncreasedReducedClosedNet

Largest Institutional Holders, Q2 2026

By reported market value, and how each moved in the quarter

Holder

Change

BLACKROCK, INC.

9.3M

+1.1%

VANGUARD CAPITAL MANAGEMENT LLC

7.2M

+1.2%

VANGUARD PORTFOLIO MANAGEMENT LLC

6.1M

+0.8%

STATE STREET CORP

5.5M

+2.5%

PRICE T ROWE ASSOCIATES INC /MD/

5.4M

-13.5%

BOSTON PARTNERS

4.7M

+18.3%

ETF & Fund Activity, Q3 2026

How the covering funds split between buying, holding and selling

1 buying8 unchanged1 selling

10 funds held DGX in Q3 2026, holding 532.3K shares between them, up 3.3% on the quarter.

Largest fund holders

SPDR SERIES TRUST478.4K sh

NATIONWIDE MUTUAL FUNDS30.6K sh

FORUM FUNDS14.1K sh

Notable Insider Transactions, Q3 2026

Largest open-market purchases and sales by value in the last eight quarters

Sale · Nov 25

Davis J. E.

$7.9M

Sale · Sep 23

PREVOZNIK MICHAEL E

$5.3M

Sale · Nov 29

PREVOZNIK MICHAEL E

$5.2M

Insider transactions from SEC Form 4 filings; institutional holdings from quarterly 13F filings, which are reported with a lag and can overlap between filers. 13F: quarterly institutional holdings report · ETF: Exchange-Traded Fund

See the complete picture

The full 5D Framework: Business Quality · Peer Comparison · Valuation · Analyst Sentiment · Smart Money

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Generated September 20, 2026

For educational purposes only. Not financial advice. Data may be delayed or incomplete.

Smart Money Sentiment

DGX Smart Money Sentiment Score

A weighted 1-5 sentiment score across three smart money signals.

Smart Money

3.7/5

Bullish

Weighted across 3 components

Component Breakdown (3 of 3 available)

Insider Activity

40% weight

Institutional Flow

50% weight

+66

Fund Flow

10% weight

Overall Smart Money sentiment of 3.7/5 (Bullish) based on a weighted combination of 3 components. Insider activity uses a relative-baseline comparison against the stock's own history; institutional flow tracks position momentum and 13F share changes; fund flow measures ETF / mutual-fund buying vs selling. Higher scores indicate stronger bullish sentiment from professional investors.Last updated September 19, 2026.

Insider Trading Activity

Insider trading analysis comparing the latest quarter against the stock's own historical baseline.

Insider Selling Pace for DGX

Each quarter's selling vs the stock's own trailing 6-quarter average; 1.0x is typical for this stock. Green triangles mark quarters with insider buying.

Neutral

Routine insider selling in Q3 2026

5 sales totaling $8.3M (34.3K shares)

Share volume is at a routine pace (0.8x average)

3 different insiders sold this quarter

Sell-only pattern: no insider purchases across 15 quarters

Steady selling pace across recent quarters

0.8x

Selling pace

quarter in progress, filings still arriving

2.92%

Stake sold

of active insiders' holdings

3 sellers

Seller breadth

vs 3.7 avg per quarter

None

Insider buying

in the last 16 quarters

Notable Recent Transactions, DGX

Top 8 highest-value insider trades from the last 8 quarters

Davis J. E.

CEO

Sell

41,004 shares at $192.27

≈24.7% of their stake at the time

Nov 25, 2025$7.88M

PREVOZNIK MICHAEL E

General Counsel

Sell

28,288 shares at $187.12

≈42.6% of their stake at the time

Sep 23, 2025$5.29M

PREVOZNIK MICHAEL E

General Counsel

Sell

32,137 shares at $163.15

≈45.5% of their stake at the time

Nov 29, 2024$5.24M

Doherty Catherine T.

EVP, Regional Businesses

Sell

28,300 shares at $163.13

≈29.3% of their stake at the time

Nov 27, 2024$4.62M

PREVOZNIK MICHAEL E

General Counsel

Sell

16,010 shares at $242.88

≈26.6% of their stake at the time

Aug 28, 2026$3.89M

Davis J. E.

CEO

Sell

10,000 shares at $242.72

≈7.6% of their stake at the time

Sep 1, 2026$2.43M

Doherty Catherine T.

EVP, Regional Businesses

Sell

10,573 shares at $205.21

≈11.2% of their stake at the time

Feb 13, 2026$2.17M

Davis J. E.

CEO

Sell

10,000 shares at $212.52

≈7.9% of their stake at the time

Mar 2, 2026$2.13M

Institutional Ownership Analysis

Institutional ownership analysis with position momentum, 13F share flow, and ownership percentage trends.

Institutional Positions for DGX

Institutions adding (new + increased) above zero, reducing (reduced + closed) below, net as a line

New Increased Reduced Closed Net (adding − reducing)

Very Bullish

Institutions accumulating in Q2 2026

96.1% institutional ownership

Moderate accumulation: 674 adding vs 434 reducing

13F shares increased by 2.9%, a notable change

Momentum improving from prior quarter

+240

Net breadth

674 adding vs 434 reducing

Accumulating

1.55

Add / reduce ratio

in Q2 2026

+41

New − closed

121 initiated, 80 exited

7 of 10

Top holders adding

largest holders with a known change

Position Changes

Q2 2026: how are institutions adjusting their positions?

+674 growing-434 shrinkingNet: +240

121

553

354

New (121)

Increased (553)

Reduced (354)

Closed (80)

Top Institutional Holders, DGX

Largest 8 institutional positions by ownership percentage as of Q2 2026

BLACKROCK, INC.

9.3M

$2.0B

Ownership

8.43%

+1.1%

VANGUARD CAPITAL MANAGEMENT LLC

7.2M

$1.5B

Ownership

6.58%

+1.2%

VANGUARD PORTFOLIO MANAGEMENT LLC

6.1M

$1.3B

Ownership

5.57%

+0.8%

STATE STREET CORP

5.5M

$1.2B

Ownership

5.02%

+2.5%

PRICE T ROWE ASSOCIATES INC /MD/

5.4M

$1.2B

Ownership

4.95%

-13.5%

BOSTON PARTNERS

4.7M

$1.0B

Ownership

4.31%

+18.3%

JPMORGAN CHASE & CO

3.5M

$748.6M

Ownership

3.20%

-8.5%

GEODE CAPITAL MANAGEMENT, LLC

3.1M

$662.6M

Ownership

2.85%

+1.7%

ETF and Mutual Fund Holdings

ETF and mutual fund activity breakdown showing buying vs selling funds, top fund holders, and detailed holdings.

Fund Activity

Q3 2026: 10 ETFs and mutual funds reporting

1 buying1 sellingNet: 0

Buying (1)

Unchanged (8)

Selling (1)

In total, funds bought 17.7K shares and sold 18 this quarter. Each fund counts once in the bar above, whatever the size of its move.

Neutral

Mixed fund activity in Q3 2026

10 ETFs and mutual funds reporting

1 buying vs 1 selling (balanced)

Top Fund Holders, DGX

Largest 8 ETF and mutual fund positions by shares held, each fund's latest filing

SPDR SERIES TRUST

478.4K

Weight

2.37%

Jul 31, 2026No change

NATIONWIDE MUTUAL FUNDS

30.6K

Weight

0.00%

Jul 31, 2026Increased

FORUM FUNDS

14.1K

Weight

66.09%

Jul 31, 2026No change

Chesapeake Investment Trust

3.8K

Weight

5.56%

Jul 31, 2026No change

Advisors Preferred Trust

3.4K

Weight

0.04%

Jun 30, 2026No change

Principal Exchange-Traded Funds

3.3K

Weight

0.01%

Jun 30, 2026No change

Absolute Shares Trust

3.2K

Weight

0.86%

Jun 30, 2026No change

BlackRock Strategic Global Bond Fund, Inc.

3.2K

Weight

0.00%

Jun 30, 2026No change

Quest Diagnostics Incorporated· DGX

Holdings Analysis

Insider Trading Activity

1.3Transaction History208Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings167Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights

Search stocks

Holdings Analysis

Insider Trading Activity

1.3Transaction History208Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings167Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights