United Kingdom Biotechnology & Medical Research

4Basebio PLC (4BB)

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Over the past 90 days, 4Basebio PLC recorded one insider transaction involving a purchase by Chief Executive Officer Dr. Amy Walker. This acquisition, valued at approximately 9,483 GBP, represents the sole insider activity during this period. The company's stock price has seen a 4% change over the last three months.
Ticker: 4BB 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 4Basebio PLC. Upgrade to see score, net flow, insiders and the full signal context.

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Trades
Buy 21 May 2026
Value £1,163,969.22 | Price 150.51 | Shares 74,056
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
2026-05-22 2026-05-21 B Purchase
3.0
Dr. Amy Walker

Chief Executive Officer

Officer
74,056
150.51
£1,163,969 		74,056 150.51 £1,163,969
2026-02-16 2026-02-13 B Purchase Dr. Amy Walker

Chief Executive Officer

Officer
55,251
168.02
£4,391,471 		55,251 168.02 £4,391,471
2026-02-11 2026-02-10 B Purchase Mr Hansjörg Plaggemars

Non-executive Director

Executive Director
22,046
231.30
£643,400 		22,046 231.30 £643,400
2026-02-11 2026-02-10 B Purchase Dr. Heikki Lanckriet

Non-executive Director

Executive Director
3,000
5.76
£17,275 		3,000 5.76 £17,275
2021-12-20 2021-12-20 B Purchase Heikki Lanckriet

Chief Executive Officer

Officer
2,500
6.50
£16,250 		2,500 6.50 £16,250
2021-12-13 2021-12-13 B Purchase Heikki Lanckriet

Chief Executive Officer

Officer
3,000
6.52
£19,560 		3,000 6.52 £19,560
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