13D
13D 13DRequired SEC filing by 5% or more shareholder. The filing is often used by activist investors. A passive investor may file the shorter 13G.
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Form SC 13D/A Superior Drilling Produc Filed by: Star Equity Fund, LP
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Form SC 13D Superior Drilling Produc Filed by: WALKER REID S
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Form SC 13D/A Superior Drilling Produc Filed by: ALBERT FRIED & CO LLC
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Form SC 13D/A Superior Drilling Produc Filed by: WALKER REID S
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