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Quest Diagnostics Inc. (DGX)

Quest Diagnostics Inc. (DGX) Insider Trading

Directors, officers and holders of more than 10% of DGX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 330 transactions on file: 0 with code P, 8 with code S and 42 with other codes.

DateInsiderCodeShares
Oct 26, 2026PFEIFFER GARY MS Sale1,203
Oct 21, 2026MAIN TIMOTHY LL Small Acquisition18
Oct 21, 2026KUPPUSAMY KARTHIKL Small Acquisition33
Oct 21, 2026DELANEY MARK EL Small Acquisition25
Oct 21, 2026SAMAD SAMA Award90
Oct 21, 2026Plewman PatrickL Small Acquisition41
Oct 21, 2026Lassiter Wright IIIL Small Acquisition6
Oct 21, 2026CARTER ROBERT BL Small Acquisition10
Oct 21, 2026Gregg Vicky BA Award63
Oct 1, 2026WENTWORTH TIMOTHY CA Award135
Sep 1, 2026Davis J. E.S Sale10,000
Aug 28, 2026PREVOZNIK MICHAEL EG Gift1,000
Aug 28, 2026PREVOZNIK MICHAEL ES Sale16,010
Aug 28, 2026PREVOZNIK MICHAEL EM Exercise22,677
Aug 28, 2026PREVOZNIK MICHAEL EM Exercise22,677
Aug 28, 2026PREVOZNIK MICHAEL ES Sale6,237
Aug 28, 2026PREVOZNIK MICHAEL ES Sale430
Jul 28, 2026DELANEY MARK ES Sale1,600
Jul 22, 2026CARTER ROBERT BL Small Acquisition11
Jul 22, 2026KUPPUSAMY KARTHIKL Small Acquisition37
Jul 22, 2026MAIN TIMOTHY LL Small Acquisition21
Jul 22, 2026SAMAD SAMA Award102
Jul 22, 2026Lassiter Wright IIIL Small Acquisition6
Jul 22, 2026DELANEY MARK EL Small Acquisition34
Jul 22, 2026Plewman PatrickL Small Acquisition46
Jul 22, 2026Gregg Vicky BA Award72
Jul 1, 2026WENTWORTH TIMOTHY CA Award144
Jun 4, 2026KUPPUSAMY KARTHIKS Sale8,147
Jun 4, 2026KUPPUSAMY KARTHIKM Exercise4,827
Jun 4, 2026KUPPUSAMY KARTHIKM Exercise4,827
Jun 4, 2026KUPPUSAMY KARTHIKM Exercise3,320
Jun 4, 2026KUPPUSAMY KARTHIKM Exercise3,320
Jun 1, 2026Davis J. E.S Sale10,000
May 20, 2026Gregg Vicky BA Award1,142
May 20, 2026MAIN TIMOTHY LA Award1,142
May 20, 2026CARTER ROBERT BA Award1,142
May 20, 2026Doi TraceyA Award1,142
May 20, 2026RING TIMOTHY MA Award1,142
May 20, 2026Lassiter Wright IIIA Award1,142
May 20, 2026MORRISON DENISE MA Award1,142
May 20, 2026PFEIFFER GARY MA Award1,142
May 20, 2026WENTWORTH TIMOTHY CA Award1,142
May 20, 2026Diaz LuisA Award1,142
Apr 20, 2026KUPPUSAMY KARTHIKL Small Acquisition39
Apr 20, 2026DELANEY MARK EL Small Acquisition37
Apr 20, 2026CARTER ROBERT BL Small Acquisition7
Apr 20, 2026Lassiter Wright IIIL Small Acquisition6
Apr 20, 2026Plewman PatrickL Small Acquisition49
Apr 20, 2026SAMAD SAMA Award108
Apr 20, 2026Gregg Vicky BA Award68

The full Form 4 history is on the DGX company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.