The Services sector saw plenty of trading activity today, including the following leaders and losers.

Some of the biggest gainers among Services stocks include:

Commvault Systems (CVLT): CVLT stock is up 19.35% today.

CGI Group (GIB): GIB stock is up 4.31% today.

CA Inc (CA): CA stock is up 4.1% today.

Connecture Inc (CNXR): CNXR stock is up 2.45% today.

Twitter Inc (TWTR): TWTR stock is up 3.35% today.

Netsol Technologies Inc (NTWK): NTWK stock is up 0.44% today.

Imperva Inc (IMPV): IMPV stock is up 1.92% today.

Archrock Inc. (AROC): AROC stock is up 1.38% today.

Hca Holdings Inc. Common Stock (HCA): HCA stock is up 1.6% today.

Castlight Health Inc (CSLT): CSLT stock is up 2.13% today.

Some of the biggest losers among Services stocks include:

Determine Inc. (DTRM): DTRM stock is down 12.99% today.

Vmware Inc (VMW): VMW stock is down 7.55% today.

Qad Inc (QADB): QADB stock is down 6.07% today.

Aac Holdings Inc (AAC): AAC stock is down 3.7% today.

Mcgrath Rentcorp (MGRC): MGRC stock is down 4.06% today.

Mobileye N.V. (MBLY): MBLY stock is down 3.67% today.

Innodata Isogen Inc (INOD): INOD stock is up 4.76% today.

Square (SQ): SQ stock is down 3.67% today.

Liberty Tripadvisor Holdings I (LTRPA): LTRPA stock is down 2.99% today.

The Keyw Holding Corp (KEYW): KEYW stock is down 2.98% today.

For more information on the best stocks to buy right now, check out the latest commentary on InvestorPlace.com.

And for more on the hot stocks moving most on Wall Street right now, check out our archive of daily market movers by sector here.

Editor’s Note: Returns for the fastest-moving stocks listed here are based on share prices 20 minutes prior to publication of this story.