Shares of Twitter (NYSE:TWTR) were on the move today, after a handful of the company's C-level executives announced they would not be selling their shares of the company when the lock-up period on employee shares expires on May 5. Goodrich Petroleum (NASDAQOTH:GDPM) saw shares skyrocket 30% today, after the company announced that it had completed its well in Baton Rouge under budget, and that the well was producing a strong flow rate that was 98% oil. Shares of F5 Networks (NASDAQ:FFIV) saw a boost to shares today, after receiving an upgrade from a Stifel Nicolaus analyst. And Chinese solar cell producer JA Solar (NASDAQ:JASO) is up today, after the company raised its shipment estimates for the first quarter.

In this segment of Monday's Investor Beat, host Alison Southwick and Motley Fool analysts Evan Niu and Taylor Muckerman discuss four stocks making moves on the market today.