Gary M. Pfeiffer

Companies

• Quest DiagnosticsBoard member Jan 4, 2006 to now¹
• EIDPChief financial officer Sep 16, 2003 to Jan 18, 2007²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• QDQuest Diagnostics DGX31,005 shares³$7.4M at $239.57May 20, 2026
• EEIDP CTA-PB58,749 shares⁴$3.3M at $56.50Jun 12, 2006

As of each latest filing. The line shows shares held over time.

Recent filings

• May 20, 2026Granted 1,142 shares of Quest Diagnostics³
• Oct 22, 2025Sold 1,482 shares at $182.40 of Quest Diagnostics⁵
• May 15, 2025Granted 1,203 shares of Quest Diagnostics⁶
• May 16, 2024Granted 1,482 shares of Quest Diagnostics⁷
• May 17, 2023Granted 1,369 shares of Quest Diagnostics⁸
• May 18, 2022Granted 1,292 shares of Quest Diagnostics⁹
• Jun 12, 2006Granted 41 shares at $41.30 of EIDP¹⁰
• Jun 12, 2006Granted 334 shares at $40.34 of EIDP⁴
• Jun 12, 2006Granted 538 shares at $40.30 of EIDP¹⁰
• Mar 14, 2006Granted 40 shares at $42.12 of EIDP¹¹
• Mar 14, 2006Granted 318 shares at $41.92 of EIDP¹¹
• Feb 10, 2006Shares withheld for tax 1,009 shares at $39.26 of EIDP¹²
• Feb 10, 2006Shares withheld for tax 896 shares at $38.84 of EIDP¹²
• Feb 1, 2006Granted 12,900 shares at $39.31 of EIDP¹³
• Dec 14, 2005Granted 38 shares at $43.81 of EIDP¹⁴
• Dec 14, 2005Granted 247 shares at $43.18 of EIDP¹⁴
• Sep 12, 2005Granted 41 shares at $40.47 of EIDP¹⁵
• Sep 12, 2005Granted 264 shares at $40.10 of EIDP¹⁵
• Jun 13, 2005Granted 34 shares at $47.97 of EIDP¹⁶
• Jun 10, 2005Granted 222 shares at $47.25 of EIDP¹⁶
• Mar 14, 2005Granted 28 shares at $54.78 of EIDP¹⁷
• Mar 14, 2005Granted 183 shares at $53.94 of EIDP¹⁷
• Dec 15, 2004Exercised options 200 shares at $28.50 of EIDP¹⁸
• Dec 14, 2004Granted 32 shares at $47.55 of EIDP¹⁸
• Sep 10, 2004Granted 35 shares at $43.64 of EIDP¹⁹