Gary M Pfeiffer

Insider

First SEC filing: Dec. 15, 2004 · Latest: Dec. 15, 2004

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

DGX selling Oct. 22, 2025

Insider transactions

0 buys (P) 1 sells (S) Net: $-270,317 + 61 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

61 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 20, 2026	DGX	A	1,142	—	—	31,005 Direct	+3.82%	Acquired	(price as of 2026-08-20)
Oct. 23, 2025	DGX	I	4,413	$190.58	$841,030	0 Direct	-100.00%	Disposed	26.5% (price as of 2026-08-20)
Oct. 22, 2025	DGX	S	1,482	$182.40	$270,317	29,431 Direct	-4.79%	Disposed	32.2% (price as of 2026-08-20)
May 15, 2025	DGX	A	1,203	—	—	30,669 Direct	+4.08%	Acquired	(price as of 2026-08-20)
May 16, 2024	DGX	A	1,482	—	—	28,916 Direct	+5.40%	Acquired	(price as of 2026-08-20)
May 17, 2023	DGX	A	1,369	—	—	26,839 Direct	+5.37%	Acquired	(price as of 2026-08-20)
May 18, 2022	DGX	A	1,292	—	—	24,982 Direct	+5.45%	Acquired	(price as of 2026-08-20)
May 25, 2021	DGX	A	1,363	—	—	23,265 Direct	+6.22%	Acquired	(price as of 2026-08-20)
May 19, 2020	DGX	A	1,531	—	—	21,513 Direct	+7.66%	Acquired	(price as of 2026-08-20)
May 14, 2019	DGX	A	1,722	—	—	19,563 Direct	+9.65%	Acquired	(price as of 2026-08-20)
May 15, 2018	DGX	A	1,644	—	—	17,462 Direct	+10.39%	Acquired	(price as of 2026-08-20)
May 16, 2017	DGX	A	1,573	—	—	15,534 Direct	+11.27%	Acquired	(price as of 2026-08-20)
Nov. 15, 2016	DGX	M	6,111	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 15, 2016	DGX	M	6,111	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 15, 2016	DGX	M	6,111	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 15, 2016	DGX	M	8,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 15, 2016	DGX	M	8,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 15, 2016	DGX	S	8,310	$85.25	$708,428	13,698 Direct	-37.76%	Disposed	182.8% (price as of 2026-08-20)
Nov. 15, 2016	DGX	S	6,111	$85.18	$520,535	22,008 Direct	-21.73%	Disposed	183.1% (price as of 2026-08-20)
Nov. 15, 2016	DGX	M	6,111	$61.22	$374,115	28,119 Direct	+27.77%	Acquired	293.9% (price as of 2026-08-20)
Nov. 15, 2016	DGX	S	6,111	$85.09	$519,985	22,008 Direct	-21.73%	Disposed	183.4% (price as of 2026-08-20)
Nov. 15, 2016	DGX	M	6,111	$57.56	$351,749	28,119 Direct	+27.77%	Acquired	318.9% (price as of 2026-08-20)
Nov. 15, 2016	DGX	S	6,111	$85.06	$519,802	22,008 Direct	-21.73%	Disposed	183.5% (price as of 2026-08-20)
Nov. 15, 2016	DGX	M	6,111	$57.66	$352,360	28,119 Direct	+27.77%	Acquired	318.2% (price as of 2026-08-20)
Nov. 15, 2016	DGX	S	8,000	$84.94	$679,520	22,008 Direct	-26.66%	Disposed	183.9% (price as of 2026-08-20)
Nov. 15, 2016	DGX	M	8,000	$55.76	$446,080	30,008 Direct	+36.35%	Acquired	332.4% (price as of 2026-08-20)
Nov. 15, 2016	DGX	S	8,000	$85.01	$680,080	22,008 Direct	-26.66%	Disposed	183.6% (price as of 2026-08-20)
Nov. 15, 2016	DGX	M	8,000	$51.55	$412,400	30,008 Direct	+36.35%	Acquired	367.7% (price as of 2026-08-20)
May 17, 2016	DGX	A	2,196	—	—	22,008 Direct	+11.08%	Acquired	(price as of 2026-08-20)
Jan. 4, 2016	DGX	A	494	$71.38	$35,262	19,685 Direct	+2.57%	Acquired	237.8% (price as of 2026-08-20)
May 15, 2015	DGX	A	2,340	—	—	19,191 Direct	+13.89%	Acquired	(price as of 2026-08-20)
Feb. 4, 2015	DGX	M	8,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 4, 2015	DGX	S	8,000	$72.43	$579,440	16,851 Direct	-32.19%	Disposed	232.9% (price as of 2026-08-20)
Feb. 4, 2015	DGX	M	8,000	$49.94	$399,520	24,851 Direct	+47.47%	Acquired	382.8% (price as of 2026-08-20)
Nov. 10, 2014	DGX	M	10,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 10, 2014	DGX	S	10,000	$61.69	$616,900	16,851 Direct	-37.24%	Disposed	290.9% (price as of 2026-08-20)
Nov. 10, 2014	DGX	M	10,000	$48.02	$480,200	26,851 Direct	+59.34%	Acquired	402.1% (price as of 2026-08-20)
May 21, 2014	DGX	A	2,924	—	—	16,851 Direct	+21.00%	Acquired	(price as of 2026-08-20)
May 7, 2014	DGX	M	10,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 7, 2014	DGX	S	10,000	$55.95	$559,500	13,927 Direct	-41.79%	Disposed	331.0% (price as of 2026-08-20)
May 7, 2014	DGX	M	10,000	$49.04	$490,400	23,927 Direct	+71.80%	Acquired	391.7% (price as of 2026-08-20)
Oct. 25, 2013	DGX	S	2,000	$58.10	$116,200	13,927 Direct	-12.56%	Disposed	315.0% (price as of 2026-08-20)
May 21, 2013	DGX	A	6,111	—	—	6,111 Direct	—	Acquired	(price as of 2026-08-20)
May 21, 2013	DGX	A	1,975	—	—	15,927 Direct	+14.16%	Acquired	(price as of 2026-08-20)
Jan. 17, 2013	DGX	M 10b5-1	10,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 17, 2013	DGX	S 10b5-1	10,000	$60.00	$600,000	13,952 Direct	-41.75%	Disposed	301.9% (price as of 2026-08-20)
Jan. 17, 2013	DGX	M 10b5-1	10,000	$55.40	$554,000	23,952 Direct	+71.67%	Acquired	335.2% (price as of 2026-08-20)
May 11, 2012	DGX	A	6,111	—	—	6,111 Direct	—	Acquired	(price as of 2026-08-20)
May 11, 2012	DGX	A	1,975	—	—	13,952 Direct	+16.49%	Acquired	(price as of 2026-08-20)
May 2, 2012	DGX	S	10,000	$58.30	$583,000	11,977 Direct	-45.50%	Disposed	313.6% (price as of 2026-08-20)
May 2, 2012	DGX	M	10,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 2, 2012	DGX	M	10,000	$53.27	$532,700	21,977 Direct	+83.49%	Acquired	352.6% (price as of 2026-08-20)
May 17, 2011	DGX	A	6,111	—	—	6,111 Direct	—	Acquired	(price as of 2026-08-20)
May 17, 2011	DGX	A	1,975	—	—	11,977 Direct	+19.75%	Acquired	(price as of 2026-08-20)
May 6, 2010	DGX	A	8,000	—	—	8,000 Direct	—	Acquired	(price as of 2026-08-20)
May 6, 2010	DGX	A	1,667	—	—	10,002 Direct	+20.00%	Acquired	(price as of 2026-08-20)
May 14, 2009	DGX	A	8,000	—	—	8,000 Direct	—	Acquired	(price as of 2026-08-20)
May 14, 2009	DGX	A	1,667	—	—	8,335 Direct	+25.00%	Acquired	(price as of 2026-08-20)
May 16, 2008	DGX	A	8,000	—	—	8,000 Direct	—	Acquired	(price as of 2026-08-20)
May 16, 2008	DGX	A	1,667	—	—	6,668 Direct	+33.33%	Acquired	(price as of 2026-08-20)
May 8, 2007	DGX	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-20)
May 8, 2007	DGX	A	1,667	—	—	5,001 Direct	+50.00%	Acquired	(price as of 2026-08-20)
Oct. 1, 2006	DGX	A	339	—	—	2,216 Direct	+18.06%	Acquired	(price as of 2026-08-20)
July 1, 2006	DGX	A	409	—	—	1,877 Direct	+27.86%	Acquired	(price as of 2026-08-20)
May 4, 2006	DGX	A	10,000	—	—	10,000 Direct	—	Acquired	(price as of 2026-08-20)
May 4, 2006	DGX	A	3,334	—	—	3,334 Direct	—	Acquired	(price as of 2026-08-20)
April 1, 2006	DGX	A	507	—	—	1,970 Direct	+34.65%	Acquired	(price as of 2026-08-20)
Jan. 1, 2006	DGX	A	665	—	—	1,463 Direct	+83.33%	Acquired	(price as of 2026-08-20)
Oct. 1, 2005	DGX	A	455	—	—	798 Direct	+132.65%	Acquired	(price as of 2026-08-20)
July 1, 2005	DGX	A	343	—	—	343 Direct	—	Acquired	(price as of 2026-08-20)
May 10, 2005	DGX	A	5,000	—	—	5,000 Direct	—	Acquired	(price as of 2026-08-20)
April 1, 2005	DGX	A	133	—	—	133 Direct	—	Acquired	(price as of 2026-08-20)
Jan. 1, 2005	DGX	A	107	—	—	107 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 13, 2004	DGX	A	5,000	—	—	5,000 Direct	—	Acquired	(price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Oct. 23, 2025	DGX	Phantom Stock	Common Stock	—	—	4,413	Disposed
Nov. 15, 2016	DGX	Stock Options (Right to Buy)	Common Stock (6,111)	$61.22	May 21, 2023	6,111	Disposed
Nov. 15, 2016	DGX	Stock Options (Right to Buy)	Common Stock (6,111)	$57.56	May 11, 2022	6,111	Disposed
Nov. 15, 2016	DGX	Stock Options (Right to Buy)	Common Stock (6,111)	$57.67	May 17, 2021	6,111	Disposed
Nov. 15, 2016	DGX	Stock Options (Right to Buy)	Common Stock (8,000)	$55.76	May 6, 2020	8,000	Disposed
Nov. 15, 2016	DGX	Stock Options (Right to Buy)	Common Stock (8,000)	$51.55	May 14, 2019	8,000	Disposed
Feb. 4, 2015	DGX	Stock Options (Right to Buy)	Common Stock (8,000)	$49.94	May 16, 2015	8,000	Disposed
Nov. 10, 2014	DGX	Stock Options (Right to Buy)	Common Stock (10,000)	$48.02	Dec. 13, 2014	10,000	Disposed
May 7, 2014	DGX	Stock Options (Right to Buy)	Common Stock (10,000)	$49.04	May 8, 2014	10,000	Disposed
May 21, 2013	DGX	Stock Options (Right to Buy)	Common Stock (6,111)	$61.22	May 21, 2023	6,111	Acquired
Jan. 17, 2013	DGX	Stock Options (Right to Buy)	Common Stock (10,000)	$55.40	May 4, 2013	10,000	Disposed
May 11, 2012	DGX	Stock Options (Right to Buy)	Common Stock (6,111)	$57.56	May 11, 2022	6,111	Acquired
May 2, 2012	DGX	Stock Options (Right to Buy)	Common Stock (10,000)	$53.27	May 10, 2012	10,000	Disposed
May 17, 2011	DGX	Stock Options (Right to Buy)	Common Stock (6,111)	$57.67	May 17, 2021	6,111	Acquired
May 6, 2010	DGX	Stock Options (Right to Buy)	Common Stock (8,000)	$55.76	May 6, 2020	8,000	Acquired
May 14, 2009	DGX	Stock Options (Right to Buy)	Common Stock (8,000)	$51.55	May 14, 2019	8,000	Acquired
May 16, 2008	DGX	Stock Options (Right to buy)	Common Stock (8,000)	$49.94	May 16, 2015	8,000	Acquired
May 8, 2007	DGX	Stock Options (Right to buy)	Common Stock (10,000)	$49.04	May 8, 2014	10,000	Acquired
Oct. 1, 2006	DGX	Phantom Stock	Common Stock (339)	$0.00	—	339	Acquired
July 1, 2006	DGX	Phantom Stock	Common Stock (409)	$0.00	—	409	Acquired
May 4, 2006	DGX	Stock Options (Right to buy)	Common Stock (10,000)	$55.40	May 4, 2013	10,000	Acquired
April 1, 2006	DGX	Phantom Stock	Common Stock (507)	$0.00	—	507	Acquired
Jan. 1, 2006	DGX	Phantom Stock	Common Stock (665)	$0.00	—	665	Acquired
Oct. 1, 2005	DGX	Phantom Stock	Common Stock (455)	$0.00	—	455	Acquired
July 1, 2005	DGX	Phantom Stock	Common Stock (343)	$0.00	—	343	Acquired
May 10, 2005	DGX	Stock Options (Right to buy)	Common Stock (5,000)	$106.54	May 10, 2012	5,000	Acquired
April 1, 2005	DGX	Phantom Stock	Common Stock (133)	$0.00	April 1, 2005	133	Acquired
Jan. 1, 2005	DGX	Phantom Stock	Common Stock (107)	$0.00	Jan. 1, 2005	107	Acquired
Dec. 13, 2004	DGX	Stock Options (Right to buy)	Common Stock (5,000)	$96.04	Dec. 13, 2014	5,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Dec. 15, 2004	DGX	Common Stock	0	Direct