United Kingdom Biotechnology & Medical Research

4Basebio PLC (4BB)

Track

Track

The most recent insider trading activity at 4Basebio PLC occurred on May 21, 2026, when CEO Dr. Amy Walker purchased shares. This follows several acquisitions by executives and directors earlier in 2026. Since the latest transaction took place over three months ago, no assessment regarding current market performance or share price trends is provided.
Ticker: 4BB Exchange: LSE
Preparing chart...
Download chart Copy chart image Copy link Share to X Share


• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
Upgrade for signal details

Upgrade to see score, net flow, insiders and context.

Upgrade to see full signal details →

Insider trades have triggered activity signals for 4Basebio PLC. Upgrade to see score, net flow, insiders and the full signal context.

Open in Activity Signals screener →
Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
3.1
Dr. Amy Walker Chief Executive Officer Officer
Transaction date
Purchase
Price
150.51
Quantity 74,056
Value £1,163,969
Dr. Amy Walker Chief Executive Officer Officer
Transaction date
Purchase
Price
168.02
Quantity 55,251
Value £4,391,471
Mr Hansjörg Plaggemars Non-executive Director Executive Director
Transaction date
Purchase
Price
231.30
Quantity 22,046
Value £643,400
Dr. Heikki Lanckriet Non-executive Director Executive Director
Transaction date
Purchase
Price
5.76
Quantity 3,000
Value £17,275
Heikki Lanckriet Chief Executive Officer Officer
Transaction date
Purchase
Price
6.50
Quantity 2,500
Value £16,250
Heikki Lanckriet Chief Executive Officer Officer
Transaction date
Purchase
Price
6.52
Quantity 3,000
Value £19,560
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
3.1
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
Explore more

More insider trading research around 4Basebio PLC

More insider trades in United Kingdom
Similar Healthcare companies with insider activity
More Pharmaceuticals & Medical Research companies with insider activity
More Biotechnology & Medical Research companies with insider activity
Insider trading in Europe