The top after-market NYSE losers on Wednesday are: Callaway Golf, Transocean, Cameron International, Banco Santander Brasil, Tidewater, AU Optronics, Royal Bank Scotland Group, HealthSouth, Steelcase and Tenet Healthcare Corp.

Callaway Golf Co. (NYSE:ELY) shares plunged 6.16 percent to $5.94 in post market trading session. The company said it will report a loss of about $55 million in the second quarter and will cut an undisclosed number of jobs. The company also announced that it has appointed Anthony Thornley as Interim President and Chief Executive Officer

Transocean Inc. (NYSE:RIG) shares declined 3.53 in post market trading session. The company announced on Wednesday that W. Richard Anderson has resigned from its Board of Directors, effective immediately, due to the demands of his duties as Chief Financial Officer of Eurasia Drilling Company Limited.

Cameron International Corp. (NYSE:CAM) shares declined 3 percent to $47.59 in post market trading session.

Banco Santander Brasil SA (NYSE:BSBR) shares declined 2.21 percent to $11.35 in aftermarket trading session.

Tidewater Inc. (NYSE:TDW) shares declined 2.17 percent to $52.18 in post market trading session. The stock has a 52 week low of $37.99 and 52 week high of $63.55 and has $2.77 billion market capitalization.

AU Optronics Corp. (NYSE:AUO) shares declined 2.07 percent to $6.63 in aftermarket trading session. The stock has a 52 week low of $6.58 and 52 week high of $10.87 and has $5.98 billion market capitalization.

Royal Bank Scotland Group Plc. (NYSE:RBS) shares declined 2.05 percent to $14.24 in aftermarket trading session.

HealthSouth Corp. (NYSE:HLS) shares declined 2.04 percent to $25.50 in post market trading session. The company announced that it received a subpoena from the U.S. Department of Health and Human Services (HHS) in connection with an investigation of possible false or improper claims submitted under Medicare and Medicaid.

Steelcase Inc. (NYSE:SCS) shares declined 1.87 percent to $11.05 in post market trading session. The stock has a 52 week low of $6.17 and 52 week high of $12.12 and has $1.48 billion market capitalization.

Tenet Healthcare Corp. (NYSE:THC) shares declined 1.78 percent to $6.08 in post market trading session.

Nyse New york city NYSE Euronext