GMX Resources Inc. (Nasdaq:GMXR), K12 Inc. (Nasdaq:LRN) and Penn Virginia Corp. (Nasdaq:PVA) are among the new 52-week lows in Monday's trading among companies with market capitalizations under $1 billion.

Also included among the results: National Western Life Insurance Co. (Nasdaq:NWLI), Integral System Inc. (Nasdaq:ISYS), Ladish Co Inc. (Nasdaq:LDSH), Trex Co Inc. (Nasdaq:TWP), Sandy Spring Bancorp Inc. (Nasdaq:SASR) and Woodward Governor Co. (Nasdaq:WGOV).

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