Friday's After-Hours Movers: Energy, Pharmaceuticals Active - Compañía de Minas (NYSE:BVN), Archrock (NYSE:AROC)

Shortly after the closing bell rang on Friday, the after-hours volume on the NYSE exceeded 27,311,000, with the most active issues being

Transocean LTDRIG

with a share volume of 2,162,164 and

Pfizer Inc.PFE

. On the NASDAQ, the after-hours volume was more than 16,517, 250, with the most active issues being

Symantec CorporationSYMC

with a share volume of 1,223,037 and

Express Scripts Holding Company

ESRX

at 1,111,620.

Largest Gainers, Largest Losers

The largest gainer thus far into the after-hours session on the NASDAQ was

TESARO IncTSRO

, up $3.20 (7.08 percent), with its last sale at $48.40.

The largest gainer on the NYSE was Evogene Ltd EVGN, up $0.19 (2.75 percent), with its last sale at $7.10.

NASDAQ's largest loser thus far was Conn's Inc CONN down $0.45 (4.12 percent) at $10.48 , while the NYSE's largest loser was Tahoe Resources Inc TAHO down $0.61 (5.38 percent) at $10.73.

Other After-Hour Movers

Prothena Corporation PLC PRTA up 4.20 percent at $46.59
Archrock Inc AROC up 1.79 percent at $7.4206
Westmoreland Coal Company WLB, down 3.84 percent at $7.02
McDermott International MDR down 4.18 percent at $3.67
Diamond Offshore Drilling Inc DO down 4.02 percent at $20.28
Hecla Mining Company HL down 3.37 percent at $2.87
Compania de Minas Buenaventura SAA (ADR) BVN down 2.72 percent at $7.6462

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