Gary M. Pfeiffer net worth and biography

Gary Pfeiffer Biography and Net Worth

Director of Quest Diagnostics

Mr. Pfeiffer retired in 2006 as the Senior Vice President and Chief Financial Officer of E.I. du Pont de Nemours and Company. He joined DuPont in 1974, where he held positions of increasing responsibility in finance and international operations, as well as in various DuPont divisions. Mr. Pfeiffer served as Secretary of Finance for the state of Delaware from January through June 2009. Mr. Pfeiffer served as a director and Chair of the Board of InterNAP Corporation from 2007 to 2020, a director of TerraVia Holdings, Inc. from 2014 to 2017 and Talbots, Inc. from 2005 to 2012. He served as the non‐executive Chair of the Board of Directors of Christiana Care Health System, a regional hospital system located in Delaware, from 2012 to 2016. Mr. Pfeiffer has been a director of Quest Diagnostics since December 2004. He has extensive executive experience, including in corporate finance, accounting, international operations, and strategic planning, with a multinational corporation operating in complex industries. Mr. Pfeiffer also has experience with cybersecurity and technology matters.

What is Gary M. Pfeiffer's net worth?: The estimated net worth of Gary M. Pfeiffer is at least $5.36 million as of October 22nd, 2025. Pfeiffer owns 29,431 shares of Quest Diagnostics stock worth more than $5,364,624 as of December 12th. This net worth evaluation does not reflect any other investments that Pfeiffer may own. Learn More about Gary M. Pfeiffer's net worth.
How do I contact Gary M. Pfeiffer?: The corporate mailing address for Pfeiffer and other Quest Diagnostics executives is 500 PLAZA DRIVE, SECAUCUS NJ, 07094. Quest Diagnostics can also be reached via phone at (973) 520-2700 and via email at [email protected]. Learn More on Gary M. Pfeiffer's contact information.
Has Gary M. Pfeiffer been buying or selling shares of Quest Diagnostics?: During the past quarter, Gary M. Pfeiffer has sold $270,316.80 of Quest Diagnostics stock. Most recently, Gary M. Pfeiffer sold 1,482 shares of the business's stock in a transaction on Wednesday, October 22nd. The shares were sold at an average price of $182.40, for a transaction totalling $270,316.80. Following the completion of the sale, the director now directly owns 29,431 shares of the company's stock, valued at $5,368,214.40. Learn More on Gary M. Pfeiffer's trading history.
Who are Quest Diagnostics' active insiders?: Quest Diagnostics' insider roster includes J. Davis (CEO), Mark Delaney (SVP), Michael Deppe (CAO), Catherine Doherty (SVP), Vicky Gregg (Director), Mark Guinan (CFO), Karthik Kuppusamy (SVP), Gary Pfeiffer (Director), Patrick Plewman (SVPfor Diagnostic Services), Michael Prevoznik (SVP), Timothy Ring (Director), Stephen Rusckowski (CEO), Daniel Stanzione (Director), and Gail Wilensky (Director). Learn More on Quest Diagnostics' active insiders.
Are insiders buying or selling shares of Quest Diagnostics?: In the last twelve months, insiders at the medical research company sold shares 24 times. They sold a total of 175,734 shares worth more than $31,849,947.70. The most recent insider tranaction occured on November, 25th when CEO J. E Davis sold 55,093 shares worth more than $10,589,976.46. Insiders at Quest Diagnostics own 8.2% of the company. Learn More about insider trades at Quest Diagnostics.
Information on this page was last updated on 11/25/2025.

Gary M. Pfeiffer Insider Trading History at Quest Diagnostics

Transaction Date	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
10/22/2025	Sell	1,482	$182.40	$270,316.80	29,431
10/25/2013	Sell	2,000	$58.10	$116,200.00
1/17/2013	Sell	10,000	$60.00	$600,000.00

Gary M. Pfeiffer Buying and Selling Activity at Quest Diagnostics

Quest Diagnostics Company Overview

Quest Diagnostics Incorporated provides diagnostic testing and services in the United States and internationally. The company develops and delivers diagnostic information services, such as routine, 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 AmeriPath, Dermpath Diagnostics, ExamOne, and Quanum brands to physicians, hospitals, patients and consumers, health plans, government agencies, employers, retailers, pharmaceutical companies and insurers, and accountable care organizations through a network of laboratories, patient service centers, phlebotomists in physician offices, call centers and mobile phlebotomists, nurses, and other health and wellness professionals. The company also provides risk assessment services for the life insurance industry; and healthcare organizations and clinicians information technology solutions. Quest Diagnostics Incorporated was founded in 1967 and is headquartered in Secaucus, New Jersey.

Today's Range

Now: $182.58

$181.23

$183.01

50 Day Range

MA: $183.61

$174.90

$192.41

2 Week Range

Now: $182.58

$148.70

$197.55

Volume

1,138,989 shs

Average Volume

1,032,360 shs

Market Capitalization

$20.31 billion

P/E Ratio

21.43

Dividend Yield

1.76%

Beta

0.62