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United Kingdom Construction & Engineering

Costain Group PLC (COST)

Track

Over the last 90 days, Costain Group PLC saw a net insider selling of approximately £2.36 million. This activity was primarily driven by executive sales, totaling around £2.38 million. Notable sell transactions were executed by the Chief Financial Officer and Chief Executive Officer. The stock has experienced a 17.2% increase in the last 90 days.
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Ticker: COST Exchange: LSE
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
ALEXANDER VAUGHAN
CHIEF EXECUTIVE OFFICER
1 sale — total 100,000 GBP
Sale 22 Jun 2026
Value £815,036.77 | Price 332.32 | Shares 19,179
Sale 22 Jun 2026
Value £4,379,502.59 | Price 453.84 | Shares 49,527
Sale 16 Jun 2026
Value £100,000.00 | Price 2.01 | Shares 1,000
Through HELEN MARGARET WILLIS, a closely affiliated person
Buy 5 May 2026
Value £19,850.27 | Price 1.86 | Shares 10,655
Buy 29 Apr 2026
Value £7,457.00 | Price 1.79 | Shares 4,169
Sale 21 Apr 2026
Value £179,611.37 | Price 1.91 | Shares 93,939
Sale 21 Apr 2026
Value £404,755.10 | Price 1.91 | Shares 211,692
Sale 20 Apr 2026
Value £216,289.26 | Price 1.91 | Shares 113,122
Sale 20 Apr 2026
Value £487,391.74 | Price 1.91 | Shares 254,912
Sale 14 Apr 2026
Value £499,515.38 | Price 1.97 | Shares 253,793
Buy 31 Mar 2026
Value £18,220.00 | Price 1.82 | Shares 10,000
Buy 10 Dec 2025
Value £9,964.79 | Price 1.57 | Shares 6,347
Sale 29 Oct 2024
Value £141,175.81 | Price 1.07 | Shares 132,249
Sale 28 Oct 2024
Value £250,973.85 | Price 1.07 | Shares 234,555
Sale 8 Apr 2024
Value £219,740.65 | Price 0.78 | Shares 282,443
Buy 27 Oct 2023
Value £52.68 | Price 0.57 | Shares 93
Through ROGER ANDREWS, a closely affiliated person
Buy 6 Sep 2023
Value £29,600.00 | Price 0.59 | Shares 50,000
Buy 21 Dec 2022
Value £19,250.00 | Price 0.39 | Shares 50,000
Buy 1 Nov 2022
Value £1,627.71 | Price 0.36 | Shares 4,534
Buy 9 Nov 2021
Value £11,158.00 | Price 0.56 | Shares 20,000
Buy 1 Nov 2021
Value £4,362.13 | Price 0.54 | Shares 8,093
Buy 20 Apr 2021
Value £16,085.00 | Price 0.64 | Shares 25,000
Sale 6 Apr 2021
Value £6,082.35 | Price 0.62 | Shares 9,890
Buy 2 Nov 2020
Value £4,646.07 | Price 0.34 | Shares 13,585
Buy 29 May 2020
Value £4,999.80 | Price 0.60 | Shares 8,333
Through ROGER ANDREWS, a closely affiliated person
Buy 29 May 2020
Value £30,000.00 | Price 0.60 | Shares 50,000
Buy 29 May 2020
Value £7,500.00 | Price 0.60 | Shares 12,500
Buy 29 May 2020
Value £24,999.60 | Price 0.60 | Shares 41,666
Buy 29 May 2020
Value £49,999.80 | Price 0.60 | Shares 83,333
Buy 29 May 2020
Value £49,999.80 | Price 0.60 | Shares 83,333
Buy 29 May 2020
Value £49,999.80 | Price 0.60 | Shares 83,333
Through ELIZABETH GOLBY, a closely affiliated person
Sale 16 Jan 2020
Value US$483,050.68 | Price 8.99 | Shares 53,732
Sale 13 Jan 2020
Value US$8,540,500.00 | Price 8.99 | Shares 950,000
Buy 1 Nov 2019
Value £3,440.12 | Price 1.71 | Shares 2,010
Sale 19 Jul 2019
Value US$19,322,144.07 | Price 8.99 | Shares 2,149,293
Buy 2 May 2019
Value £3,996.69 | Price 3.33 | Shares 1,201
Through ROGER ANDREWS, a closely affiliated person
Sale 5 Apr 2019
Value £45,560.34 | Price 3.57 | Shares 12,762
Sale 5 Apr 2019
Value £68,765.34 | Price 3.57 | Shares 19,262
Sale 21 Sep 2018
Value US$170,093.70 | Price 5.22 | Shares 32,585
Sale 10 Aug 2018
Value US$2,178,813.18 | Price 3.21 | Shares 678,758
Sale 8 Aug 2018
Value US$37,521.36 | Price 5.22 | Shares 7,188
Sale 3 Aug 2018
Value US$15,007.50 | Price 5.22 | Shares 2,875
Sale 3 Aug 2018
Value US$37,500.00 | Price 5.00 | Shares 7,500
Sale 15 Jun 2018
Value US$100,000.00 | Price 5.00 | Shares 20,000
Sale 15 Jun 2018
Value US$60,030.00 | Price 5.22 | Shares 11,500
Sale 15 Jun 2018
Value US$70,000.00 | Price 5.00 | Shares 14,000
Sale 15 Jun 2018
Value US$30,000.00 | Price 5.00 | Shares 6,000
Buy 4 Jun 2018
Value £14,996.47 | Price 4.70 | Shares 3,194
Through ROGER ANDREWS, a closely affiliated person
Sale 10 Apr 2018
Value £44,277.48 | Price 4.61 | Shares 9,613
Sale 10 Apr 2018
Value £66,418.52 | Price 4.61 | Shares 14,420
Sale 6 Apr 2018
Value £78,515.25 | Price 4.61 | Shares 17,050
Sale 6 Apr 2018
Value £4.61 | Price 0.00 | Shares 25,576
Sale 12 Mar 2018
Value £50,260.84 | Price 4.76 | Shares 10,559
Sale 12 Mar 2018
Value £75,864.88 | Price 4.76 | Shares 15,938
Sale 9 Mar 2018
Value £88,770.72 | Price 4.74 | Shares 18,728
Sale 9 Mar 2018
Value £133,990.32 | Price 4.74 | Shares 28,268
Sale 7 Mar 2018
Value US$192,500.00 | Price 5.00 | Shares 38,500
Sale 7 Mar 2018
Value US$28,000.00 | Price 4.00 | Shares 7,000
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 Details
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
42,566
109.50
£1,978,704 		42,566 109.50 £1,978,704
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
3.5
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
2.3
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
2.3
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
3.3
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
3.3
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
2.3
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
3.4
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
3.5
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
2.3
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
2.3
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
3.3
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
3.4
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
3.4
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
3.3
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
3.3
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
3.3
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
3.3
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
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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