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United Kingdom Chemicals

Synthomer PLC (SYNT)

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The most recent insider trading activity at Synthomer PLC occurred on August 7, 2025, with a BUY transaction by Uwe Halder, a Non-Executive Director. Prior to this, significant BUY transactions were observed in October 2023, involving multiple directors and executives, including the Chief Financial Officer and Chief Executive Officer. One SELL transaction was also recorded in October 2023.
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Ticker: SYNT Exchange: LSE
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Uwe Halder
Non-Executive Director
1 purchase — total 15,925 GBP
Buy 7 Aug 2025
Value £3,383,380.45 | Price 279.40 | Shares 97,149
Sale 30 Oct 2023
Value £4,127,327.90 | Price 174.16 | Shares 89,311
Buy 30 Oct 2023
Value £3,410,507.48 | Price 191.07 | Shares 9,060
Buy 20 Oct 2023
Value £18,500.00 | Price 1.85 | Shares 10,000
Buy 16 Oct 2023
Value £41,000.00 | Price 2.05 | Shares 20,000
Buy 13 Oct 2023
Value £23,640.00 | Price 1.97 | Shares 12,000
Buy 13 Oct 2023
Value £39,502.44 | Price 1.97 | Shares 20,052
Buy 13 Oct 2023
Value £276,257.04 | Price 1.97 | Shares 140,232
Buy 13 Oct 2023
Value £98,500.00 | Price 1.97 | Shares 50,000
Through CairnSea Investments, a closely affiliated person
Buy 13 Oct 2023
Value £51,816.91 | Price 1.97 | Shares 26,303
Through Schivas Estates Ltd, a closely affiliated person
Buy 13 Oct 2023
Value £313,074.37 | Price 1.97 | Shares 158,921
Through SG Catto Charitable Trust, a closely affiliated person
Buy 13 Oct 2023
Value £59,100.00 | Price 1.97 | Shares 30,000
Through Crescent Trustees, a closely affiliated person
Buy 13 Oct 2023
Value £17,068.08 | Price 1.97 | Shares 8,664
Through Hon Alexander Catto, a closely affiliated person
Buy 13 Oct 2023
Value £234,075.40 | Price 1.97 | Shares 118,820
Buy 13 Oct 2023
Value £13,191.12 | Price 1.97 | Shares 6,696
Buy 13 Oct 2023
Value £106,380.00 | Price 1.97 | Shares 54,000
Buy 13 Oct 2023
Value £77,570.72 | Price 1.97 | Shares 39,376
Sale 10 Oct 2023
Value £3,434.61 | Price 0.19 | Shares 18,020
Through Hon Alexander Catto, a closely affiliated person
Sale 10 Oct 2023
Value £60,683.42 | Price 0.19 | Shares 318,381
Through SG Catto Charitable Trust, a closely affiliated person
Buy 10 Oct 2023
Value £17,149.62 | Price 0.19 | Shares 89,977
Through Schivas Estates Ltd, a closely affiliated person
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
2025-08-11 2025-08-07 B Purchase Uwe Halder

Non-Executive Director

Executive Director
97,149
279.40
£3,383,380 		97,149 279.40 £3,383,380
2023-11-03 2023-10-30 S Sale Alexander Catto

Non-Executive Director

Executive Director
89,311
174.16
£4,127,328 		89,311 174.16 £4,127,328
2023-11-03 2023-10-30 B Purchase Alexander Catto

Non-Executive Director

Executive Director
9,060
191.07
£3,410,507 		9,060 191.07 £3,410,507
2023-10-23 2023-10-20 B Purchase
1.3
Holly Van Deursen

Non-Executive Director

Executive Director
10,000
1.85
£18,500 		10,000 1.85 £18,500
2023-10-17 2023-10-16 B Purchase
2.1
Lily Liu

Chief Financial Officer

Officer
20,000
2.05
£41,000 		20,000 2.05 £41,000
2023-10-18 2023-10-13 B Purchase
1.3
Holly A. Van Deursen

Independent Non-executive Director

Non-Executive Director
12,000
1.97
£23,640 		12,000 1.97 £23,640
2023-10-18 2023-10-13 B Purchase Roberto Gualdoni

Independent Non-executive Director

Non-Executive Director
20,052
1.97
£39,502 		20,052 1.97 £39,502
2023-10-18 2023-10-13 B Purchase Lee Hau Hian

Non-executive Director

Executive Director
140,232
1.97
£276,257 		140,232 1.97 £276,257
2023-10-18 2023-10-13 B Purchase
1.2
Hon Alexander Catto

PCA to the Hon Alexander Catto (PDMR)

Through CairnSea Investments, a closely affiliated person
50,000
1.97
£98,500 		50,000 1.97 £98,500
2023-10-18 2023-10-13 B Purchase
1.2
Hon Alexander Catto

PCA to the Hon Alexander Catto (PDMR)

Through Schivas Estates Ltd, a closely affiliated person
26,303
1.97
£51,817 		26,303 1.97 £51,817
2023-10-18 2023-10-13 B Purchase
1.2
Hon Alexander Catto

PCA to the Hon Alexander Catto (PDMR)

Through SG Catto Charitable Trust, a closely affiliated person
158,921
1.97
£313,074 		158,921 1.97 £313,074
2023-10-18 2023-10-13 B Purchase
1.2
Hon Alexander Catto

PCA to the Hon Alexander Catto (PDMR)

Through Crescent Trustees, a closely affiliated person
30,000
1.97
£59,100 		30,000 1.97 £59,100
2023-10-18 2023-10-13 B Purchase Elizabeth Catto

PCA to the Hon Alexander Catto (PDMR)

Through Hon Alexander Catto, a closely affiliated person
8,664
1.97
£17,068 		8,664 1.97 £17,068
2023-10-18 2023-10-13 B Purchase Alexander Catto

Non-executive Director

Executive Director
118,820
1.97
£234,075 		118,820 1.97 £234,075
2023-10-18 2023-10-13 B Purchase
2.1
Lily Liu

Chief Financial Officer

Officer
6,696
1.97
£13,191 		6,696 1.97 £13,191
2023-10-18 2023-10-13 B Purchase Michael Willome

Chief Executive Officer

Officer
54,000
1.97
£106,380 		54,000 1.97 £106,380
2023-10-18 2023-10-13 B Purchase
3.7
Caroline Johnstone

Chair

Director
39,376
1.97
£77,571 		39,376 1.97 £77,571
2023-10-16 2023-10-10 S Sale Elizabeth Catto

PCA to the Hon Alexander Catto (PDMR)

Through Hon Alexander Catto, a closely affiliated person
18,020
0.19
£3,435 		18,020 0.19 £3,435
2023-10-16 2023-10-10 S Sale
1.2
Hon Alexander Catto

PCA to the Hon Alexander Catto (PDMR)

Through SG Catto Charitable Trust, a closely affiliated person
318,381
0.19
£60,683 		318,381 0.19 £60,683
2023-10-16 2023-10-10 B Purchase
1.2
Hon Alexander Catto

PCA to the Hon Alexander Catto (PDMR)

Through Schivas Estates Ltd, a closely affiliated person
89,977
0.19
£17,150 		89,977 0.19 £17,150
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