NYSE:DGX

Quest Diagnostics Stock Insider Trading

Healthcare > Medical - Diagnostics & Research

Buy DGX

*Your capital is at risk

$233.01

-1.29 (-0.551%)

At Close: Jul 31, 2026

Quest Diagnostics Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -35.26. In total, the insiders bought 276.49K and sold 111.79K DGX shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-35.26
● Buy	276.49K shares
● Sell	111.79K shares
59% Buy Activity Weak Positive Correlation
Buy Signal Low Confidence Mar 04, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -35.26. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
May 20, 2026 Buy	Common Stock A-Award	Ring Timothy M Director	Director	1 142 Value: $221.3K
Apr 20, 2026 Buy	Common Stock A-Award	Gregg Vicky B Director	Director	68 Value: $13.2K
Apr 20, 2026 Buy	Common Stock L-Small	Plewman Patrick SVP For Diagnostic Services	Officer	49 Value: $10K
Apr 20, 2026 Buy	Common Stock A-Award	Samad Sam Executive Vice President & CFO	CEO / President	108 Value: $21.0K
Apr 20, 2026 Buy	Common Stock L-Small	Carter Robert B Director	Director	7 Value: $1K
Apr 20, 2026 Buy	Common Stock L-Small	Delaney Mark E SVP & Chief Commercial Officer	Officer	37 Value: $7K
Apr 20, 2026 Buy	Common Stock L-Small	Kuppusamy Karthik SVP, Clinical Solutions	Officer	39 Value: $8K
Apr 20, 2026 Buy	Common Stock L-Small	Lassiter Wright Iii Director	Director	6 Value: $1K
Apr 01, 2026 Buy	Phantom Stock Units A-Award	Wentworth Timothy C Director	Director	198 Value: $39.1K
Mar 09, 2026 Buy	Common Stock A-Award	Wentworth Timothy C Director	Director	215 Value: $43.3K
Mar 09, 2026 Buy	Common Stock J-Other	Wentworth Timothy C	Director	0 Value: $0
Mar 05, 2026 Sell	Common Stock S-Sale	Plewman Patrick SVP For Diagnostic Services	Officer	2 855 Value: $588.7K
Mar 05, 2026 Sell	Common Stock S-Sale	Doherty Catherine T. EVP, Regional Businesses	Officer	5 558 Value: $1.15M
Mar 05, 2026 Sell	Common Stock S-Sale	Prevoznik Michael E SVP & General Counsel	Officer	3 878 Value: $799.7K
Mar 04, 2026 Sell	Common Stock F-InKind	Plewman Patrick SVP For Diagnostic Services	Officer	2 827 Value: $579.1K
Mar 04, 2026 Sell	Common Stock F-InKind	Prevoznik Michael E SVP & General Counsel	Officer	3 354 Value: $687.1K
Mar 04, 2026 Buy	Common Stock A-Award	Prevoznik Michael E SVP & General Counsel	Officer	7 232 Value: $1.48M
Mar 04, 2026 Sell	Common Stock F-InKind	Delaney Mark E SVP & Chief Commercial Officer	Officer	2 326 Value: $476.5K
Mar 04, 2026 Buy	Common Stock A-Award	Delaney Mark E SVP & Chief Commercial Officer	Officer	5 682 Value: $1.16M
Mar 04, 2026 Sell	Common Stock S-Sale	Kuppusamy Karthik SVP, Clinical Solutions	Officer	2 628 Value: $538.4K
Mar 04, 2026 Buy	Common Stock A-Award	Kuppusamy Karthik SVP, Clinical Solutions	Officer	6 200 Value: $1.27M
Mar 04, 2026 Buy	Common Stock A-Award	Samad Sam Executive Vice President & CFO	CEO / President	13 947 Value: $2.86M
Mar 04, 2026 Sell	Common Stock F-InKind	Samad Sam Executive Vice President & CFO	CEO / President	7 720 Value: $1.58M
Mar 04, 2026 Buy	Common Stock A-Award	Doherty Catherine T. EVP, Regional Businesses	Officer	11 364 Value: $2.33M
Mar 04, 2026 Sell	Common Stock F-InKind	Doherty Catherine T. EVP, Regional Businesses	Officer	5 806 Value: $1.19M

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT QUEST DIAGNOSTICS INCORPORATED

Quest Diagnostics Incorporated provides diagnostic testing, information, and services in the United States and internationally. The company develops and delivers diagnostic information services, such as routine testing, non-routine and advanced clinical testing, anatomic pathology testing, and other diagnostic information services. It offers diagnostic information services primarily under the Quest Diagnostics brand, as well as under the AmeriPat...

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