LAMBERT WILLIAM M

Vice President at MSA Safety Inc · on record since Mar 11, 2004
Director at MSA Safety Inc · on record since Dec 8, 2009
Director at KENNAMETAL INC · on record since Mar 3, 2016
Director at EQT Corp · on record since Nov 15, 2018

Insider trading activity of LAMBERT WILLIAM M

Transactions on record: 386; since Mar 11, 2004

Open-market buys: 2; $1.2M

Open-market sells: 74; $87.3M

Companies traded: 3; last filing Sep 16, 2026

Figures computed from official regulatory filings — .

Companies where LAMBERT WILLIAM M has traded

MSA Safety Inc325 tx · $186.1M · Sep 16, 2026
KENNAMETAL INC59 tx · $3M · Aug 18, 2026
EQT Corp2 tx · Jan 3, 2019

Track record of LAMBERT WILLIAM M

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of LAMBERT WILLIAM M

Co-insiders of LAMBERT WILLIAM M

ALBERDING RICHARD CKENNAMETAL INC
ALVARADO JOSEPHKENNAMETAL INC
ARNOLD DAVID BKENNAMETAL INC
Ashcroft Jeremiah J IIIEQT Corp
Audia Damon JKENNAMETAL INC
Bacchus Judith LKENNAMETAL INC
BAGLEY R DANIELKENNAMETAL INC
BAILEY MARTHA AKENNAMETAL INC
BAILEY VICKY AEQT Corp
BAILLIE JAMES HMSA Safety Inc
BARTLETT PETER BKENNAMETAL INC
Bausch Shelley JKENNAMETAL INC
BECK JULIE AMSA Safety Inc
Beebe Lydia IEQT Corp
BEHRMAN PHILIP GEQT Corp

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
MSA Safety IncListing on record	Sep 16, 2026	Gift	-6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MSA Safety IncListing on record	Sep 16, 2026	Gift	-2,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	Exercise	6,092	31.22 USD	$190.2K		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	AwardD (derivative)	4,965	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	ExerciseD (derivative)	-1,860	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	ExerciseD (derivative)	-2,299	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	ExerciseD (derivative)	-1,933	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	Other	-186	31.22 USD	$5.8K		SEC
MSA Safety IncListing on record	May 14, 2026	Award	899	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Feb 19, 2026	Other	-7,485	39.04 USD	$292.2K		SEC
KENNAMETAL INCListing on record	Feb 19, 2026	ExerciseD (derivative)	-14,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Feb 19, 2026	Exercise	14,000	20.87 USD	$292.2K		SEC
MSA Safety IncListing on record	Dec 16, 2025	Gift	-9,634	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	Other	-170	21.02 USD	$3.6K		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	Exercise	5,566	21.02 USD	$117K		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	ExerciseD (derivative)	-1,773	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	ExerciseD (derivative)	-1,860	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	AwardD (derivative)	6,898	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	ExerciseD (derivative)	-1,933	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MSA Safety IncListing on record	May 19, 2025	Award	909	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MSA Safety IncListing on record	Nov 19, 2024	Gift	-2,200	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2024	AwardD (derivative)	5,800	25.00 USD	$145K	Unusual size	SEC
KENNAMETAL INCListing on record	Aug 19, 2024	ExerciseD (derivative)	-1,772	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2024	Exercise	4,766	25.00 USD	$119.2K		SEC
KENNAMETAL INCListing on record	Aug 19, 2024	ExerciseD (derivative)	-1,859	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
MSA Safety IncListing on record	Sep 16, 2026	Gift	-6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MSA Safety IncListing on record	Sep 16, 2026	Gift	-2,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	Exercise	6,092	31.22 USD	$190.2K		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	AwardD (derivative)	4,965	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	ExerciseD (derivative)	-1,860	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	ExerciseD (derivative)	-2,299	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	ExerciseD (derivative)	-1,933	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 18, 2026	Other	-186	31.22 USD	$5.8K		SEC
MSA Safety IncListing on record	May 14, 2026	Award	899	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Feb 19, 2026	Other	-7,485	39.04 USD	$292.2K		SEC
KENNAMETAL INCListing on record	Feb 19, 2026	ExerciseD (derivative)	-14,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Feb 19, 2026	Exercise	14,000	20.87 USD	$292.2K		SEC
MSA Safety IncListing on record	Dec 16, 2025	Gift	-9,634	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	Other	-170	21.02 USD	$3.6K		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	Exercise	5,566	21.02 USD	$117K		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	ExerciseD (derivative)	-1,773	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	ExerciseD (derivative)	-1,860	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	AwardD (derivative)	6,898	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2025	ExerciseD (derivative)	-1,933	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MSA Safety IncListing on record	May 19, 2025	Award	909	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
MSA Safety IncListing on record	Nov 19, 2024	Gift	-2,200	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2024	AwardD (derivative)	5,800	25.00 USD	$145K	Unusual size	SEC
KENNAMETAL INCListing on record	Aug 19, 2024	ExerciseD (derivative)	-1,772	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
KENNAMETAL INCListing on record	Aug 19, 2024	Exercise	4,766	25.00 USD	$119.2K		SEC
KENNAMETAL INCListing on record	Aug 19, 2024	ExerciseD (derivative)	-1,859	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC