Galileonewton....TRXC only has 63M shares outstanding, vs 102.5M for Titan. Therefore, each share of TRXC is intrinsically a larger piece of the shareholder pie, which translates to a greater PPS.
A better measure is each company's market capitalization. The market cap is # of shares outstanding X share price. Titan's market cap is currently $140M and TRXC's is $180M. If Titan's share price goes to $2, their market cap would be over $200M.
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