Prudential Financial has dumped almost a million Tidewater shares.

According to a Securities and Exchange Commission filing made Thursday, the New Jersey investment manager trimmed its ownership stake in the offshore player from 6% to 1.8%.

Prudential now owns 634,785 shares, from 1.6 million.

Tidwater shares were down 5.1%, or $1.13, to $20.85 in midday trading Thursday.

The company completed a $1.25bn