Kathleen M. Mazzarella

Companies

• Core & MainBoard member Jul 23, 2021 to now¹
• The Cigna GroupBoard member Dec 26, 2018 to now²
• Waste Management, IncBoard member Oct 1, 2015 to now³
• GRAYBAR ELECTRIC CO INCChair Jan 13, 2014 to now⁴
• GRAYBAR ELECTRIC CO INCChief executive officer Jan 11, 2013 to now⁵
• GRAYBAR ELECTRIC CO INCPresident Jan 11, 2013 to now⁵
• Express ScriptsBoard member Jun 27, 2017 to Dec 21, 2018⁶
• GRAYBAR ELECTRIC CO INCBoard member Jan 12, 2006 to Jan 11, 2013⁷
• GRAYBAR ELECTRIC CO INCChief operating officer Jan 14, 2011 to Jan 13, 2012⁸
• GRAYBAR ELECTRIC CO INCSr. VP-HR & Strategic Planning Jan 12, 2006 to Jan 15, 2010⁷

Holdings

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

Shares held

• Waste Management, Inc WM18,276 shares⁹$4.1M at $226.88May 15, 2026
• CThe Cigna Group CI6,891 shares¹⁰$2.1M at $302.40Apr 22, 2026
• Core & Main CNM16,839 shares¹¹$698.8K at $41.50Jun 24, 2026
• GEGRAYBAR ELECTRIC CO INC288,350 shares¹²Jan 9, 2026

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

Recent filings

• Jun 23, 2026Granted 2,799 shares of Core & Main¹¹
• May 15, 2026Granted 1,314 shares at $220.71 of Waste Management, Inc⁹
• Apr 22, 2026Granted 782 shares of The Cigna Group¹⁰
• Jan 9, 2026Other 9,615 shares at $20.00 of GRAYBAR ELECTRIC CO INC¹²
• Jan 9, 2026Other 9,615 shares at $20.00 of GRAYBAR ELECTRIC CO INC¹²
• Jul 15, 2025Granted 1,063 shares at $227.45 of Waste Management, Inc¹³
• Jun 24, 2025Granted 2,189 shares of Core & Main¹⁴
• Apr 23, 2025Granted 638 shares of The Cigna Group¹⁵
• Jan 15, 2025Granted 674 shares at $207.78 of Waste Management, Inc¹⁶
• Jan 10, 2025Other 8,988 shares at $20.00 of GRAYBAR ELECTRIC CO INC¹⁷
• Jan 10, 2025Other 8,988 shares at $20.00 of GRAYBAR ELECTRIC CO INC¹⁷
• Jul 15, 2024Granted 651 shares at $215.07 of Waste Management, Inc¹⁸
• Jun 26, 2024Granted 2,449 shares of Core & Main¹⁹
• Apr 24, 2024Granted 539 shares of The Cigna Group²⁰
• Jan 15, 2024Granted 777 shares at $180.29 of Waste Management, Inc²¹
• Jan 12, 2024Other 8,400 shares at $20.00 of GRAYBAR ELECTRIC CO INC²²
• Jan 12, 2024Other 8,400 shares at $20.00 of GRAYBAR ELECTRIC CO INC²²
• Jul 15, 2023Granted 834 shares at $167.92 of Waste Management, Inc²³
• Jun 28, 2023Granted 3,927 shares of Core & Main²⁴
• May 8, 2023Granted 111 shares at $169.11 of Waste Management, Inc²⁵
• Apr 26, 2023Granted 765 shares of The Cigna Group²⁶
• Jan 15, 2023Granted 588 shares at $153.06 of Waste Management, Inc²⁷
• Jan 13, 2023Other 7,005 shares at $20.00 of GRAYBAR ELECTRIC CO INC²⁸
• Jan 13, 2023Other 7,005 shares at $20.00 of GRAYBAR ELECTRIC CO INC²⁸
• Jul 19, 2022Granted 5,393 shares of Core & Main²⁹