By Sara Sjolin, MarketWatch

LONDON (MarketWatch) -- Here are the companies whose shares are making notable moves in European trade on Thursday.

Decliners

Bouygues SA shares dropped 1.6% after the French conglomerate lowered its forecast for full-year revenue amid a price war in France's telecom sector.

Gemalto NV slid 5% after the digital-security company said profit declined in the first half.

Mining firms slumped in London as iron-ore prices fell to a two-year low, according to media reports. Shares of Rio Tinto PLC (RIO) dropped 3.4%, BHP Billiton PLC (BHP) fell 2% and Anglo American PLC lost 3%.

Gainers

Essilor International SA climbed 4.9% after the eye-wear lens maker said profit more than doubled in the first half, buoyed by its recent acquisitions.

Tullow Oil PLC added 1% after the oil-exploration company said it has found more oil in Kenya.

Shares of DNB ASA rose 0.7% after Exane BNP Paribas lifted the Norwegian bank to outperform from neutral.

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