Southwest Airlines Co (LUV) had significant options trading volume with a total of 40,826 contracts traded, representing 4.1 million shares. A $39.50 strike put option had high volume. F5 Inc (FFIV) saw 5,086 contracts traded, representing 508,600 shares, with a $260 strike call option showing high volume. Citigroup Inc (C) had 64,406 contracts traded, representing 6.4 million shares, with a $105 strike put option having particularly high volume. For more information on these options, visit StockOptionsChannel.com.

Read more at Nasdaq: Noteworthy Wednesday Option Activity: LUV, FFIV, C