Form SC 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0001050442-21-000012
Filing Date
2021-02-16
Accepted
2021-02-16 17:28:37
Documents
1

Document Format Files

Seq Description Document Type Size
1 FORM 13G 2020-12-31 GEOS_20201231.txt SC 13G 8463
  Complete submission text file 0001050442-21-000012.txt   10035
Mailing Address 7007 PINEMONT DR. HOUSTON TX 77040
Business Address 7007 PINEMONT DR. HOUSTON TX 77040 7139864444
GEOSPACE TECHNOLOGIES CORP (Subject) CIK: 0001001115 (see all company filings)

EIN.: 760447780 | State of Incorp.: TX | Fiscal Year End: 0930
Type: SC 13G | Act: 34 | File No.: 005-52075 | Film No.: 21641108
SIC: 3829 Measuring & Controlling Devices, NEC

Mailing Address 150 S. FIFTH ST SUITE 2550 MINNEAPOLIS MN 55402
Business Address 150 S 5TH ST SUITE 2550 MINNEAPOLIS MN 55402 6123174100
DISCIPLINED GROWTH INVESTORS INC /MN (Filed by) CIK: 0001050442 (see all company filings)

EIN.: 411901233 | State of Incorp.: MN | Fiscal Year End: 1231
Type: SC 13G