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Clarkson PLC (CKN)

Track

Over the last 90 days, Clarkson PLC has seen significant net selling activity, primarily driven by executives. The Chief Financial Officer & Chief Operating Officer and the Chief Executive Officer have made substantial sell transactions. A single independent non-executive director made a small buy transaction, resulting in a net negative value for insider trading.

Top insider sells (90, 60, 30d)

Top cluster sells (60d)

Top executive sells (90, 60, 30d)

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Top insider sells

Top cluster sells

Top executive sells

Stock chart

Ticker: CKN Exchange: LSE

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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings

Top insiders

Company data & Insiders

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Trades

Jeffrey David Woyda

Chief Financial Officer & Chief Operating Officer

1 sale — total 2,866,800 GBP

Sale 14 May 2026

Value £3,061,137.38 | Price 11.35 | Shares 10,901

Jeffrey David Woyda

Chief Financial Officer & Chief Operating Officer

1 sale — total 1,042,661 GBP

Sale 13 May 2026

Value £3,992,940.27 | Price 35.11 | Shares 41,705

Jeffrey David Woyda

Chief Financial Officer & Chief Operating Officer

2 sales — total 184,648 GBP

Sale 20 Apr 2026

Value £105,753.67 | Price 47.87 | Shares 2,209

Sale 20 Apr 2026

Value £78,894.20 | Price 47.96 | Shares 1,645

Andi Leigh Case

Chief Executive Officer

1 sale — total 302,388 GBP

Sale 20 Apr 2026

Value £302,387.80 | Price 47.96 | Shares 6,305

Constantin Cotzias

Independent Non-Executive Director

1 purchase — total 50,725 GBP

Buy 19 Mar 2026

Value £50,725.28 | Price 46.24 | Shares 1,097

Constantin Cotzias

Non-Executive Director

1 purchase — total 36,795 GBP

Buy 7 Aug 2024

Value £36,795.20 | Price 37.70 | Shares 976

Laurence Hollingworth

Chair

1 purchase — total 107,630 GBP

Buy 3 Oct 2022

Value £107,629.60 | Price 26.91 | Shares 4,000

Sue Harris

Non-Executive Director

1 purchase — total 50,341 GBP

Buy 26 Apr 2021

Value £50,340.80 | Price 29.20 | Shares 1,724

Jeffrey David Woyda

Chief Financial Officer & Chief Operating Officer

1 sale — total 30,641 GBP

Sale 19 Apr 2021

Value £30,640.65 | Price 28.45 | Shares 1,077

Dr Tim Miller

Non-Executive Director

1 purchase — total 77,007 GBP

Buy 14 Apr 2021

Value £77,007.48 | Price 29.17 | Shares 2,640

Heike Truol

Non-Executive Director

1 purchase — total 44,978 GBP

Buy 6 Apr 2021

Value £44,977.52 | Price 27.99 | Shares 1,607

Sir Bill Thomas

Chair

1 purchase — total 99,489 GBP

Buy 30 Mar 2021

Value £99,489.40 | Price 27.40 | Shares 3,631

Through Lady Julie Thomas, a closely affiliated person

Laurence Hollingworth

Non-Executive Director

1 purchase — total 111,500 GBP

Buy 10 Nov 2020

Value £111,500.00 | Price 22.30 | Shares 5,000

Andrew Boteler

Non-Executive Director

1 purchase — total 20,877 GBP

Buy 28 Oct 2020

Value £20,876.86 | Price 1.11 | Shares 18,727

Peter Backhouse

Non-Executive Director

1 sale — total 23,132 GBP

Sale 5 Oct 2020

Value £23,132.00 | Price 23.13 | Shares 1,000

Peter Backhouse

Non-Executive Director

1 sale — total 11,750 GBP

Sale 1 Oct 2020

Value £11,750.00 | Price 23.50 | Shares 500

Peter Backhouse

Non-Executive Director

1 sale — total 11,750 GBP

Sale 29 Sep 2020

Value £11,750.00 | Price 23.50 | Shares 500

Peter Backhouse

Non-Executive Director

1 sale — total 2,112 GBP

Sale 28 Sep 2020

Value £2,112.00 | Price 24.00 | Shares 88

Peter Backhouse

Non-Executive Director

1 sale — total 23,500 GBP

Sale 25 Sep 2020

Value £23,500.00 | Price 23.50 | Shares 1,000

Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other

Notification date	Transaction date	B/S Transaction type	Insider and/or position	Nb. shares Price Value	Number of shares	Price	Value
2026-05-15	2026-05-14	S Sale	1.0 Jeffrey David Woyda Chief Financial Officer & Chief Operating Officer Officer	10,901 11.35 £3,061,137	10,901	11.35	£3,061,137
2026-05-15	2026-05-13	S Sale	1.0 Jeffrey David Woyda Chief Financial Officer & Chief Operating Officer Officer	41,705 35.11 £3,992,940	41,705	35.11	£3,992,940
2026-04-21	2026-04-20	S Sale	1.0 Jeffrey David Woyda Chief Financial Officer & Chief Operating Officer Officer	7,899 129.38 £2,504,525	7,899	129.38	£2,504,525
2026-04-21	2026-04-20	S Sale	1.0 Jeffrey David Woyda Chief Financial Officer & Chief Operating Officer Officer	1,645 47.96 £78,894	1,645	47.96	£78,894
2026-04-21	2026-04-20	S Sale	Andi Leigh Case Chief Executive Officer Officer	6,305 47.96 £302,388	6,305	47.96	£302,388
2026-03-19	2026-03-19	B Purchase	2.2 Constantin Cotzias Independent Non-Executive Director Non-Executive Director	1,097 46.24 £50,725	1,097	46.24	£50,725
2024-08-12	2024-08-07	B Purchase	2.2 Constantin Cotzias Non-Executive Director Executive Director	976 37.70 £36,795	976	37.70	£36,795
2022-10-04	2022-10-03	B Purchase	4.0 Laurence Hollingworth Chair Director	4,000 26.91 £107,630	4,000	26.91	£107,630
2021-04-27	2021-04-26	B Purchase	3.0 Sue Harris Non-Executive Director Executive Director	1,724 29.20 £50,341	1,724	29.20	£50,341
2021-04-20	2021-04-19	S Sale	1.0 Jeffrey David Woyda Chief Financial Officer & Chief Operating Officer Officer	1,077 28.45 £30,641	1,077	28.45	£30,641
2021-04-14	2021-04-14	B Purchase	2.5 Dr Tim Miller Non-Executive Director Executive Director	2,640 29.17 £77,007	2,640	29.17	£77,007
2021-04-06	2021-04-06	B Purchase	3.1 Heike Truol Non-Executive Director Executive Director	1,607 27.99 £44,978	1,607	27.99	£44,978
2021-03-30	2021-03-30	B Purchase	3.5 Sir Bill Thomas Chair Through Lady Julie Thomas, a closely affiliated person Director	3,631 27.40 £99,489	3,631	27.40	£99,489
2020-11-11	2020-11-10	B Purchase	4.0 Laurence Hollingworth Non-Executive Director Executive Director	5,000 22.30 £111,500	5,000	22.30	£111,500
2020-10-30	2020-10-28	B Purchase	3.1 Andrew Boteler Non-Executive Director Executive Director	18,727 1.11 £20,877	18,727	1.11	£20,877
2020-10-06	2020-10-05	S Sale	3.2 Peter Backhouse Non-Executive Director Executive Director	1,000 23.13 £23,132	1,000	23.13	£23,132
2020-10-06	2020-10-01	S Sale	3.2 Peter Backhouse Non-Executive Director Executive Director	500 23.50 £11,750	500	23.50	£11,750
2020-09-30	2020-09-29	S Sale	3.2 Peter Backhouse Non-Executive Director Executive Director	500 23.50 £11,750	500	23.50	£11,750
2020-09-30	2020-09-28	S Sale	3.2 Peter Backhouse Non-Executive Director Executive Director	88 24.00 £2,112	88	24.00	£2,112
2020-09-30	2020-09-25	S Sale	3.2 Peter Backhouse Non-Executive Director Executive Director	1,000 23.50 £23,500	1,000	23.50	£23,500