CLARKE JOHN U

Director at NATCO GROUP INC · on record since Jun 26, 2006
Director at HARVEST NATURAL RESOURCES, INC. · on record since May 22, 2006
Director at HOUSTON EXPLORATION CO · on record since May 2, 2006
Director at BAYTEX ENERGY USA, INC. · on record since Dec 10, 2009
Director at Thermon Group Holdings, Inc. · on record since Apr 2, 2026
Director at TESCO CORP · on record since Aug 12, 2011
Director at Glori Energy Inc. · on record since Apr 24, 2014
Interim CEO at NATCO GROUP INC · on record since Sep 8, 2004
Chief Executive Officer at NATCO GROUP INC · on record since Jan 12, 2005

Insider trading activity of CLARKE JOHN U

Transactions on record: 138; since Aug 5, 2003

Open-market buys: 5; $1.2M

Open-market sells: 1; $158.4K

Companies traded: 7; last filing Jun 3, 2026

Figures computed from official regulatory filings — .

Companies where CLARKE JOHN U has traded

Thermon Group Holdings, Inc.31 tx · $766.2K · Jun 3, 2026
BAYTEX ENERGY USA, INC.52 tx · $664K · Oct 1, 2015
Glori Energy Inc.1 tx · Jan 30, 2015
TESCO CORP13 tx · $206.3K · Aug 13, 2013
NATCO GROUP INC19 tx · $6.4M · Nov 18, 2009
HOUSTON EXPLORATION CO10 tx · $748.2K · Jun 8, 2007
12 tx · $512.4K · May 25, 2007

Track record of CLARKE JOHN U

Open-market buys: 5

Last buy: Feb 5, 2024

Enough buys on record, but none of them has a 63-day return yet — this happens when the shares stopped trading, or when the buys are too recent. Win rates will appear once returns mature.

Transaction history of CLARKE JOHN U

Co-insiders of CLARKE JOHN U

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Thermon Group Holdings, Inc.Listing unverified	Jun 3, 2026	Other	-41,570	—	n/a (No price was disclosed in the filing)		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 2, 2026	Award	531	51.78 USD	$27.5K	Unusual size	SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 5, 2026	Award	740	37.16 USD	$27.5K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 2, 2025	Award	1,008	27.28 USD	$27.5K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jul 2, 2025	Award	830	28.61 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 2, 2025	Award	843	28.14 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 3, 2025	Award	825	28.77 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 2, 2024	Award	805	29.49 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 2, 2024	Award	798	29.74 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 3, 2024	Award	722	32.88 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Feb 6, 2024	Buy	5,000	25.01 USD	$125.1K	conv 37First in 12mo	SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 3, 2024	Award	729	32.57 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 3, 2023	Award	864	27.74 USD	$24K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jul 5, 2023	Award	892	26.60 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 4, 2023	Award	953	24.92 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 4, 2023	Award	1,182	20.08 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 3, 2022	Award	1,541	15.41 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jul 6, 2022	Award	1,655	14.35 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 5, 2022	Award	1,461	16.25 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 3, 2022	Award	1,402	16.93 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 4, 2021	Award	1,334	17.80 USD	$23.7K	Unusual size	SEC
Thermon Group Holdings, Inc.Listing unverified	Jul 6, 2021	Award	1,392	17.06 USD	$23.7K	Unusual size	SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 6, 2021	Award	1,228	19.34 USD	$23.7K	Unusual size	SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 5, 2021	Award	1,519	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 5, 2020	Award	2,079	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
Thermon Group Holdings, Inc.Listing unverified	Jun 3, 2026	Other	-41,570	—	n/a (No price was disclosed in the filing)		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 2, 2026	Award	531	51.78 USD	$27.5K	Unusual size	SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 5, 2026	Award	740	37.16 USD	$27.5K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 2, 2025	Award	1,008	27.28 USD	$27.5K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jul 2, 2025	Award	830	28.61 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 2, 2025	Award	843	28.14 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 3, 2025	Award	825	28.77 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 2, 2024	Award	805	29.49 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 2, 2024	Award	798	29.74 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 3, 2024	Award	722	32.88 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Feb 6, 2024	Buy	5,000	25.01 USD	$125.1K	conv 37First in 12mo	SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 3, 2024	Award	729	32.57 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 3, 2023	Award	864	27.74 USD	$24K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jul 5, 2023	Award	892	26.60 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 4, 2023	Award	953	24.92 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 4, 2023	Award	1,182	20.08 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 3, 2022	Award	1,541	15.41 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jul 6, 2022	Award	1,655	14.35 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 5, 2022	Award	1,461	16.25 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 3, 2022	Award	1,402	16.93 USD	$23.7K		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 4, 2021	Award	1,334	17.80 USD	$23.7K	Unusual size	SEC
Thermon Group Holdings, Inc.Listing unverified	Jul 6, 2021	Award	1,392	17.06 USD	$23.7K	Unusual size	SEC
Thermon Group Holdings, Inc.Listing unverified	Apr 6, 2021	Award	1,228	19.34 USD	$23.7K	Unusual size	SEC
Thermon Group Holdings, Inc.Listing unverified	Jan 5, 2021	Award	1,519	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Thermon Group Holdings, Inc.Listing unverified	Oct 5, 2020	Award	2,079	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC