U.S. announced mergers fell back to Earth this week.

A spate of big announcements — H.J. Heinz, Dell and Virgin Media– helped boost deal value by 509% during the first half of February. This week, the last full one of February, deal value for U.S. mergers was much, much lower. There were 78 U.S. announced transactions for the period ended Feb. 21, valued at about $10.1 billion, according to data from Thomson Reuters. This compares to the same time period in 2012, when there were 118 transactions, valued at roughly $15.7 billion.

The week’s biggest deal was Linn Energy’s $2.5 billion offer for Berry Petroleum. Thomson Reuters values this transaction at $4.1 billion.

On the private equity side there were just seven announced deals this week, valued at $312 million, TR says. Last year, for the same time period, there were 24 PE-backed deals, totaling about $7.2 billion.

Here are the week’s top 5 deals, according to Thomson Reuters.

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5. HYCOR Biomedical

In fifth place is HYCOR Biomedical, which is backed by Linden Capital Partners.

Hycor on Wednesday said it would sell its urinalysis business to One Rock Capital Partners, Laurel Crown Partners, and StoneCreek Capital. Financial terms weren’t announced.