<SEC-DOCUMENT>0001050442-21-000012-index.html : 20210216 <SEC-HEADER>0001050442-21-000012.hdr.sgml : 20210216 <ACCEPTANCE-DATETIME>20210216172837 ACCESSION NUMBER: 0001050442-21-000012 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20210216 DATE AS OF CHANGE: 20210216 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: GEOSPACE TECHNOLOGIES CORP CENTRAL INDEX KEY: 0001001115 STANDARD INDUSTRIAL CLASSIFICATION: MEASURING & CONTROLLING DEVICES, NEC [3829] IRS NUMBER: 760447780 STATE OF INCORPORATION: TX FISCAL YEAR END: 0930 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-52075 FILM NUMBER: 21641108 BUSINESS ADDRESS: STREET 1: 7007 PINEMONT DR. CITY: HOUSTON STATE: TX ZIP: 77040 BUSINESS PHONE: 7139864444 MAIL ADDRESS: STREET 1: 7007 PINEMONT DR. CITY: HOUSTON STATE: TX ZIP: 77040 FORMER COMPANY: FORMER CONFORMED NAME: OYO GEOSPACE CORP DATE OF NAME CHANGE: 19950919 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: DISCIPLINED GROWTH INVESTORS INC /MN CENTRAL INDEX KEY: 0001050442 IRS NUMBER: 411901233 STATE OF INCORPORATION: MN FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 150 S 5TH ST STREET 2: SUITE 2550 CITY: MINNEAPOLIS STATE: MN ZIP: 55402 BUSINESS PHONE: 6123174100 MAIL ADDRESS: STREET 1: 150 S. FIFTH ST STREET 2: SUITE 2550 CITY: MINNEAPOLIS STATE: MN ZIP: 55402 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G <SEQUENCE>1 <FILENAME>GEOS_20201231.txt <DESCRIPTION>FORM 13G 2020-12-31 <TEXT> Document 1 - file: GEOS_20201231.txt
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