GRAMPA JOHN D

Director at PARK OHIO HOLDINGS CORP · on record since May 18, 2026
Sr. VP Finance and CFO at MARTEN TRANSPORT LTD · on record since Mar 10, 2014
VP Finance, CFO at MATERION Corp · on record since Feb 9, 2005

Insider trading activity of GRAMPA JOHN D

Transactions on record: 185; since Feb 19, 2004

Open-market buys: 2; $137.5K

Open-market sells: 22; $1.9M

Companies traded: 3; last filing Aug 17, 2026

Figures computed from official regulatory filings — .

Companies where GRAMPA JOHN D has traded

PARK OHIO HOLDINGS CORP61 tx · $313K · Aug 17, 2026
MARTEN TRANSPORT LTD45 tx · $2.6M · Nov 21, 2014
MATERION Corp79 tx · $2.7M · Feb 3, 2011

Track record of GRAMPA JOHN D

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

Transaction history of GRAMPA JOHN D

Co-insiders of GRAMPA JOHN D

Chadwick Shelly MarieMARTEN TRANSPORT LTD +1
Chemnitz Gregory R.MARTEN TRANSPORT LTD +1
CRAWFORD EDWARD FMARTEN TRANSPORT LTD +1
Fashinpaur Melissa AMARTEN TRANSPORT LTD +1
Hipple Richard JMARTEN TRANSPORT LTD +1
KEITHLEY JOSEPH PMARTEN TRANSPORT LTD +1
KHILNANI VINOD MMARTEN TRANSPORT LTD +1
LAWRENCE WILLIAM BMARTEN TRANSPORT LTD +1
LIGGETT EMILY MMARTEN TRANSPORT LTD +1
MADAR WILLIAM PMARTEN TRANSPORT LTD +1
PHILLIPPY ROBERT JMARTEN TRANSPORT LTD +1
Prevost Patrick M.MARTEN TRANSPORT LTD +1
REDDY N MOHANMARTEN TRANSPORT LTD +1
ROBERTSON WILLIAM RMARTEN TRANSPORT LTD +1
SHERWIN JOHN JRMARTEN TRANSPORT LTD +1
SHULAR CRAIG SMARTEN TRANSPORT LTD +1
SKOCH DANIEL AMARTEN TRANSPORT LTD +1
Solomon Darlene J. S.MARTEN TRANSPORT LTD +1

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
PARK OHIO HOLDINGS CORPListing on record	Aug 17, 2026	AwardD (derivative)	93	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 23, 2026	Sell	-1,000	36.25 USD	$36.3K	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 23, 2026	Sell	-2,844	36.20 USD	$103K	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 23, 2026	Sell	-1,000	36.30 USD	$36.3K	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 1, 2026	Award	3,072	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	May 18, 2026	AwardD (derivative)	149	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Feb 23, 2026	AwardD (derivative)	168	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Dec 1, 2025	AwardD (derivative)	212	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 18, 2025	AwardD (derivative)	232	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 17, 2025	Award	4,844	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	May 19, 2025	AwardD (derivative)	227	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Feb 24, 2025	AwardD (derivative)	187	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Dec 2, 2024	AwardD (derivative)	138	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 21, 2024	AwardD (derivative)	151	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 27, 2024	Award	4,350	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	May 20, 2024	AwardD (derivative)	163	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Feb 26, 2024	AwardD (derivative)	175	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Dec 4, 2023	AwardD (derivative)	180	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 21, 2023	AwardD (derivative)	225	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 21, 2023	AwardD (derivative)	225	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 2, 2023	AwardD (derivative)	6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	May 22, 2023	AwardD (derivative)	227	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Feb 27, 2023	AwardD (derivative)	258	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Dec 5, 2022	AwardD (derivative)	261	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 22, 2022	AwardD (derivative)	184	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	Src
PARK OHIO HOLDINGS CORPListing on record	Aug 17, 2026	AwardD (derivative)	93	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 23, 2026	Sell	-1,000	36.25 USD	$36.3K	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 23, 2026	Sell	-2,844	36.20 USD	$103K	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 23, 2026	Sell	-1,000	36.30 USD	$36.3K	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 1, 2026	Award	3,072	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	May 18, 2026	AwardD (derivative)	149	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Feb 23, 2026	AwardD (derivative)	168	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Dec 1, 2025	AwardD (derivative)	212	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 18, 2025	AwardD (derivative)	232	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 17, 2025	Award	4,844	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	May 19, 2025	AwardD (derivative)	227	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Feb 24, 2025	AwardD (derivative)	187	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Dec 2, 2024	AwardD (derivative)	138	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 21, 2024	AwardD (derivative)	151	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 27, 2024	Award	4,350	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	May 20, 2024	AwardD (derivative)	163	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Feb 26, 2024	AwardD (derivative)	175	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Dec 4, 2023	AwardD (derivative)	180	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 21, 2023	AwardD (derivative)	225	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 21, 2023	AwardD (derivative)	225	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Jun 2, 2023	AwardD (derivative)	6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	May 22, 2023	AwardD (derivative)	227	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Feb 27, 2023	AwardD (derivative)	258	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Dec 5, 2022	AwardD (derivative)	261	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
PARK OHIO HOLDINGS CORPListing on record	Aug 22, 2022	AwardD (derivative)	184	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC