Company · Ownership research

QUEST DIAGNOSTICS INC DGX

CIK 0001022079

Form 4 transactions dated Sep 1, 2023 to Sep 26, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 93 rows; the complete set is available through the API.

Insider filings on file run through 2026-09-03.

Insider purchases & sales

Purchased: $0.00
Sold: $79.13M

Sep 1, 2023 – Sep 3, 2026
Available records · partial months are marked ·

202510 of 29 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-11-25	Davis J. E. CEO and President · Director	Sale10b5-1 footnote	$10.59M 55,093 shares sold	31.38% sold Direct holding	▾
2025-11-25	Gregg Vicky B Director	Sale	$239.70K 1,250 shares sold	6.84% sold Direct holding	▾
2025-11-18	DELANEY MARK E SVP & Chief Commercial Officer	Sale10b5-1 footnote	$1.49M 7,946 shares sold	51.34% sold Direct holding	▾
2025-10-22	PFEIFFER GARY M Director	Sale	$270.32K 1,482 shares sold	4.79% sold Direct holding	▾
2025-09-26	PREVOZNIK MICHAEL E SVP & General Counsel	Sale10b5-1 footnote	$42.71K 227 shares sold	0.59% sold Direct holding	▾
2025-09-24	PREVOZNIK MICHAEL E SVP & General Counsel	Sale10b5-1 footnote	$32.73K 175 shares sold	0.46% sold Direct holding	▾
2025-09-23	PREVOZNIK MICHAEL E SVP & General Counsel	Sale10b5-1 footnote	$5.29M 28,288 shares sold	42.60% sold Direct holding	▾
2025-08-21	Plewman Patrick SVP for Diagnostic Services	Sale10b5-1 footnote	$365.38K 1,975 shares sold	11.45% sold Direct holding	▾
2025-08-19	Plewman Patrick SVP for Diagnostic Services	Sale10b5-1 footnote	$829.36K 4,532 shares sold	20.81% sold Direct holding	▾
2025-08-15	Plewman Patrick SVP for Diagnostic Services	Sale10b5-1 footnote	$355.50K 1,975 shares sold	10.28% sold Direct holding	▾

Showing 29 / 29 record groups in 2025. The complete set is available through the API.

QUEST DIAGNOSTICS INC · DGX

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 29 of 29 purchase / sale groups and 30 of 93 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"DGX","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.