Dawson Operating Co – Filings and Transcripts – BamSEC

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SEC EDGAR

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ended 12/31/14 Q1

ended 09/30/14 FY 2014

ended 06/30/14 Q3

ended 03/31/14 Q2

ended 12/31/13 Q1

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Securities registration termination

Updated info for already-effective prospectus

Amendment to registration of securities for employees

Amendment to registration of securities for employees

Amendment to registration of securities for employees

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Dimensional Fund Advisors LP

Paradigm Capital Management Inc/Ny

Dimensional Fund Advisors LP

Jumper Stephen C

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Geophysical Announces Completion of Strategic Business Combination

Geophysical and TGC Industries Shareholders Approve Strategic Business Combination

Geophysical to File a Quarterly Report on Form 10-Q for First Quarter 2015 Results

Geophysical and Tgc Industries Announce Filing of Definitive Proxy Materials and Commencement of Mailing Definitive Proxy Materials to Their Respective Shareholders

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Definitive proxy

Definitive proxy

Definitive proxy

Definitive proxy

Definitive proxy

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Notice of effectiveness

Notice of effectiveness

Letter from the SEC

Notice of effectiveness

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