Check out the companies making the biggest moves midday: Brighthouse Financial — The insurance company soared 26% after it announced it would be bought by Aquarian Capital for $70 per share in cash, or around $4.1 billion. The deal is expected to close next year. Golden Entertainment — The casino operator surged 36% after announcing it would be acquired by Blake Sartini for $30 per share — a 41% premium from Wednesday's close. The deal is expected to close midway through next year. Datadog — Shares of the cloud cybersecurity company soared 21% on better-than-expected results for the third quarter. Datadog earned 55 cents per share, excluding certain items, on revenue of $886 million. Analysts expected a profit of 45 cents per share on revenue of $853.5 million. Datadog also raised its full

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