Kevin Douglas, a little known, but hugely successful, investor, is throwing even more money behind Westport Innovations (Nasdaq: WPRT ) , a Foolish favorite and one of Douglas's most recent positions. In the last three months he's put another $35 million on the line, for a grand total of $54 million in 2012.
As the single largest holder of Westport stock, Mr. Douglas has a lot riding on its success.
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