(Sharecast News) - The largest market purchase of shares in London on Thursday came from Oxford Biomedica's chair Roch Doliveux. who upped his stake in the cell and gene therapy company after a sharp drop in the stock over the year to date.

Doliveux, has been at the helm of the board since 2020, bought 20,250 shares at a price of 505p each, spending a total of £102,262.50.

OXB's share price closed Wednesday's session at 481p, having lost over a quarter of its value since the start of 2026.

After the latest purchase, Oxford Biomedica said Doliveux owns 459,055 shares, equivalent to 0.379% of the company's issued share capital.

Top Director Buys

Oxford Biomedica (OXB)

Director name: Doliveux,Roch

Amount purchased: 20,250 @ 505.00p

Value: £102,262.50

St James's Place (STJ)

Director name: Manduca,Paul

Amount purchased: 3,624 @ 1,097.73p

Value: £39,781.55

St James's Place (STJ)

Director name: Manduca,Paul

Amount purchased: 3,624 @ 1,097.73p

Value: £39,781.55

Trufin (TRU)

Director name: Bergh,James van den

Amount purchased: 30,000 @ 97.57p

Value: £29,271.00

Gresham House Energy Storage Fund (GRID)

Director name: Stevenson ,David

Amount purchased: 8,610 @ 98.10p

Value: £8,446.41

Activeops (AOM)

Director name: Jeffery,Richard John

Amount purchased: 73 @ 205.00p

Value: £149.65

St James's Place (STJ)

Director name: FitzPatrick,Mark

Amount purchased: 4 @ 1,125.23p

Value: £45.01

St James's Place (STJ)

Director name: Manduca,Paul

Amount purchased: 2 @ 1,125.23p

Value: £22.50