United Kingdom Construction & Engineering

Costain Group PLC (COST)

Track

Over the past 90 days, Costain Group PLC has seen significant insider selling, primarily from executive leadership including the CEO and CFO, totaling approximately £3.15 million in net value. While non-executive directors have made minor share purchases, the overall trend is dominated by executive divestment amid a 20.8% increase in the company's stock price.
Ticker: COST Exchange: LSE
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Costain Group PLC. Upgrade to see score, net flow, insiders and the full signal context.

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Trades
Buy 23 Jun 2026
Value £1,243,363.01 | Price 191.09 | Shares 50,686
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 Details
2026-06-25 2026-06-23 B Purchase
AMANDA LUCIA FISHER

NON-EXECUTIVE DIRECTOR

Executive Director
50,686
191.09
£1,243,363 		50,686 191.09 £1,243,363
2026-06-23 2026-06-22 S Sale
ALEXANDER VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
19,179
332.32
£815,037 		19,179 332.32 £815,037
2026-06-23 2026-06-22 S Sale
ALICE MARY VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
49,527
453.84
£4,379,503 		49,527 453.84 £4,379,503
2026-06-18 2026-06-16 S Sale
COLIN JOHN KEANE

CHIEF FINANCIAL OFFICER

Through HELEN MARGARET WILLIS, a closely affiliated person Officer
344,645
2.01
£691,013 		344,645 2.01 £691,013
2026-05-05 2026-05-05 B Purchase
STEVEN MOOGFORD

NON-EXECUTIVE DIRECTOR

Executive Director
10,655
1.86
£19,850 		10,655 1.86 £19,850
2026-04-30 2026-04-29 B Purchase
3.6
FIONA MACAULAY

NON-EXECUTIVE DIRECTOR

Executive Director
4,169
1.79
£7,457 		4,169 1.79 £7,457
2026-04-22 2026-04-21 S Sale
1.9
HELEN MARGARET WILLIS

CHIEF FINANCIAL OFFICER

Officer
93,939
1.91
£179,611 		93,939 1.91 £179,611
2026-04-22 2026-04-21 S Sale
1.9
HELEN MARGARET WILLIS

CHIEF FINANCIAL OFFICER

Officer
211,692
1.91
£404,755 		211,692 1.91 £404,755
2026-04-22 2026-04-20 S Sale
3.1
ALEXANDER JOHN VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
113,122
1.91
£216,289 		113,122 1.91 £216,289
2026-04-22 2026-04-20 S Sale
3.1
ALEXANDER JOHN VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
254,912
1.91
£487,392 		254,912 1.91 £487,392
2026-04-15 2026-04-14 S Sale
1.9
HELEN MARGARET WILLIS

CHIEF FINANCIAL OFFICER

Officer
253,793
1.97
£499,515 		253,793 1.97 £499,515
2026-04-01 2026-03-31 B Purchase
3.3
KATE ROCK

NON-EXECUTIVE CHAIR

Director
10,000
1.82
£18,220 		10,000 1.82 £18,220
2025-12-11 2025-12-10 B Purchase
3.6
FIONA MACAULAY

NON-EXECUTIVE DIRECTOR

Executive Director
6,347
1.57
£9,965 		6,347 1.57 £9,965
2024-10-30 2024-10-29 S Sale
1.9
HELEN MARGARET WILLIS

CHIEF FINANCIAL OFFICER

Officer
132,249
1.07
£141,176 		132,249 1.07 £141,176
2024-10-30 2024-10-28 S Sale
1.9
HELEN MARGARET WILLIS

CHIEF FINANCIAL OFFICER

Officer
234,555
1.07
£250,974 		234,555 1.07 £250,974
2024-04-09 2024-04-08 S Sale
3.1
ALEXANDER JOHN VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
282,443
0.78
£219,741 		282,443 0.78 £219,741
2023-10-27 2023-10-27 B Purchase
1.2
JACQUELINE DE ROJAS

HUSBAND OF JACQUELINE DE ROJAS (PDMR)

Through ROGER ANDREWS, a closely affiliated person
93
0.57
£53 		93 0.57 £53
2023-09-06 2023-09-06 B Purchase
3.3
KATE ROCK

NON-EXECUTIVE CHAIR

Director
50,000
0.59
£29,600 		50,000 0.59 £29,600
2022-12-21 2022-12-21 B Purchase
3.3
KATE ROCK

NON-EXECUTIVE CHAIR

Director
50,000
0.39
£19,250 		50,000 0.39 £19,250
2022-11-01 2022-11-01 B Purchase
3.1
ALEXANDER JOHN VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
4,534
0.36
£1,628 		4,534 0.36 £1,628
2021-11-10 2021-11-09 B Purchase
3.5
NEIL CROCKETT

NON-EXECUTIVE DIRECTOR

Executive Director
20,000
0.56
£11,158 		20,000 0.56 £11,158
2021-11-02 2021-11-01 B Purchase
3.1
ALEXANDER JOHN VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
8,093
0.54
£4,362 		8,093 0.54 £4,362
2021-04-20 2021-04-20 B Purchase
0.8
ANTHONY JAMES QUINLAN

NON-EXECUTIVE DIRECTOR

Executive Director
25,000
0.64
£16,085 		25,000 0.64 £16,085
2021-04-08 2021-04-06 S Sale
3.1
ALEXANDER JOHN VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
9,890
0.62
£6,082 		9,890 0.62 £6,082
2020-11-03 2020-11-02 B Purchase
3.1
ALEXANDER JOHN VAUGHAN

CHIEF EXECUTIVE OFFICER

Officer
13,585
0.34
£4,646 		13,585 0.34 £4,646
2020-05-29 2020-05-29 B Purchase
1.2
JACQUELINE DE ROJAS

HUSBAND OF JACQUELINE DE ROJAS (PDMR)

Through ROGER ANDREWS, a closely affiliated person
8,333
0.60
£5,000 		8,333 0.60 £5,000
2020-05-29 2020-05-29 B Purchase
2.5
DAVID MCMANUS

NON-EXECUTIVE DIRECTOR

Executive Director
50,000
0.60
£30,000 		50,000 0.60 £30,000
2020-05-29 2020-05-29 B Purchase
ALISON WOOD

NON-EXECUTIVE DIRECTOR

Executive Director
12,500
0.60
£7,500 		12,500 0.60 £7,500
2020-05-29 2020-05-29 B Purchase
2.9
JANE LODGE

NON-EXECUTIVE DIRECTOR

Executive Director
41,666
0.60
£25,000 		41,666 0.60 £25,000
2020-05-29 2020-05-29 B Purchase
3.2
ANTHONY BICKERSTAFF

FINANCE DIRECTOR

Executive Director
83,333
0.60
£50,000 		83,333 0.60 £50,000
2020-05-29 2020-05-29 B Purchase
ALEX VAUGHAN

CEO

Officer
83,333
0.60
£50,000 		83,333 0.60 £50,000
2020-05-29 2020-05-29 B Purchase
3.3
PAUL GOLBY

WIFE OF PAUL GOLBY (PDMR)

Through ELIZABETH GOLBY, a closely affiliated person
83,333
0.60
£50,000 		83,333 0.60 £50,000
2020-01-17 2020-01-16 S Sale
Wan Miky Y.C.

President, CEO

Executive Director Large shareholder
53,732 -0.7%
8.99
US$483,051 		53,732 -0.7% 8.99 US$483,051
2020-01-16 2020-01-13 S Sale
Cheung Koon Wing
Large shareholder
950,000 -10.8%
8.99
US$8,540,500 		950,000 -10.8% 8.99 US$8,540,500
2019-11-04 2019-11-01 B Purchase
3.2
ANTHONY OLIVER BICKERSTAFF

GROUP FINANCE DIRECTOR

Executive Director
2,010
1.71
£3,440 		2,010 1.71 £3,440
2020-01-16 2019-07-19 S Sale
Cheung Koon Wing
Large shareholder
2,149,293 -19.6%
8.99
US$19,322,144 		2,149,293 -19.6% 8.99 US$19,322,144
2019-05-03 2019-05-02 B Purchase
1.2
JACQUELINE DE ROJAS

HUSBAND OF JACQUELINE DE ROJAS (PDMR)

Through ROGER ANDREWS, a closely affiliated person
1,201
3.33
£3,997 		1,201 3.33 £3,997
2019-04-09 2019-04-05 S Sale
3.2
ANTHONY OLIVER BICKERSTAFF

GROUP FINANCE DIRECTOR

Executive Director
12,762
3.57
£45,560 		12,762 3.57 £45,560
2019-04-09 2019-04-05 S Sale
3.2
ANDREW WYLLIE

CHIEF EXECUTIVE

Officer
19,262
3.57
£68,765 		19,262 3.57 £68,765
2018-09-26 2018-09-21 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
32,585 -0.4%
5.22
US$170,094 		32,585 -0.4% 5.22 US$170,094
2018-08-14 2018-08-10 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
678,758 -8.1%
3.21
US$2,178,813 		678,758 -8.1% 3.21 US$2,178,813
2018-08-14 2018-08-08 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
7,188 -0.1%
5.22
US$37,521 		7,188 -0.1% 5.22 US$37,521
2018-08-14 2018-08-03 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
2,875 -0.0%
5.22
US$15,008 		2,875 -0.0% 5.22 US$15,008
2018-08-14 2018-08-03 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
7,500 -0.1%
5.00
US$37,500 		7,500 -0.1% 5.00 US$37,500
2018-06-18 2018-06-15 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
20,000 -0.2%
5.00
US$100,000 		20,000 -0.2% 5.00 US$100,000
2018-06-18 2018-06-15 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
11,500 -0.1%
5.22
US$60,030 		11,500 -0.1% 5.22 US$60,030
2018-06-18 2018-06-15 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
14,000 -0.2%
5.00
US$70,000 		14,000 -0.2% 5.00 US$70,000
2018-06-18 2018-06-15 S Sale Wan Miky Y.C.

President, Interim CFO

Executive Director Large shareholder
6,000 -0.1%
5.00
US$30,000 		6,000 -0.1% 5.00 US$30,000
2018-06-05 2018-06-04 B Purchase
1.2
JACQUELINE DE ROJAS

HUSBAND OF JACQUELINE DE ROJAS (PDMR)

Through ROGER ANDREWS, a closely affiliated person
3,194
4.70
£14,996 		3,194 4.70 £14,996
2018-04-11 2018-04-10 S Sale
3.2
ANTHONY OLIVER BICKERSTAFF

GROUP FINANCE DIRECTOR

Executive Director
9,613
4.61
£44,277 		9,613 4.61 £44,277
2018-04-11 2018-04-10 S Sale
3.2
ANDREW WYLLIE

CHIEF EXECUTIVE

Officer
14,420
4.61
£66,419 		14,420 4.61 £66,419
2018-04-11 2018-04-06 S Sale
3.2
ANTHONY OLIVER BICKERSTAFF

GROUP FINANCE DIRECTOR

Executive Director
17,050
4.61
£78,515 		17,050 4.61 £78,515
2018-04-11 2018-04-06 S Sale
3.2
ANDREW WYLLIE

CHIEF EXECUTIVE

Officer
25,576
0.00
£5 		25,576 0.00 £5
2018-03-13 2018-03-12 S Sale
3.2
ANTHONY OLIVER BICKERSTAFF

GROUP FINANCE DIRECTOR

Executive Director
10,559
4.76
£50,261 		10,559 4.76 £50,261
2018-03-13 2018-03-12 S Sale
3.2
ANDREW WYLLIE

CHIEF EXECUTIVE

Officer
15,938
4.76
£75,865 		15,938 4.76 £75,865
2018-03-13 2018-03-09 S Sale
3.2
ANTHONY OLIVER BICKERSTAFF

GROUP FINANCE DIRECTOR

Executive Director
18,728
4.74
£88,771 		18,728 4.74 £88,771
2018-03-13 2018-03-09 S Sale
3.2
ANDREW WYLLIE

CHIEF EXECUTIVE

Officer
28,268
4.74
£133,990 		28,268 4.74 £133,990
2018-03-12 2018-03-07 S Sale Wan Miky Y.C.

President and Interim CFO

Executive Director
38,500 -0.5%
5.00
US$192,500 		38,500 -0.5% 5.00 US$192,500
2018-03-12 2018-03-07 S Sale Wan Miky Y.C.

President and Interim CFO

Executive Director
7,000 -0.1%
4.00
US$28,000 		7,000 -0.1% 4.00 US$28,000
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