SDI Group PLC - Cambridge, England-based maker of scientific and technology products for digital imaging and sensing control applications - Chair Ken Ford buys 100,000 shares at 50.39 pence, worth £50,390, on Friday. Ford now has 1.2 million shares, a 1.2% stake.

Current stock price: 50.75 pence, up 3.6% in London on Friday

12-month change: down 14%

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