Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0001258897-17-000860
Filing Date
2017-02-09
Accepted
2017-02-09 07:58:44
Documents
1

Document Format Files

Seq Description Document Type Size
1 SCHEDULE 13G/A dfs062.htm SC 13G/A 51257
  Complete submission text file 0001258897-17-000860.txt   52929
Mailing Address 6300 BEE CAVE ROAD BUILDING ONE AUSTIN TX 78746
Business Address 6300 BEE CAVE ROAD BUILDING ONE AUSTIN TX 78746 (512) 306-7400
DIMENSIONAL FUND ADVISORS LP (Filed by) CIK: 0000354204 (see all company filings)

EIN.: 222370029 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A
SIC: 0000

Mailing Address 508 WEST WALL STREET SUITE 550 MIDLAND TX 79701
Business Address 508 WEST WALL STREET SUITE 550 MIDLAND TX 79701 432-262-2700
NATURAL GAS SERVICES GROUP INC (Subject) CIK: 0001084991 (see all company filings)

EIN.: 752811855 | Fiscal Year End: 1231
Type: SC 13G/A | Act: 34 | File No.: 005-78868 | Film No.: 17584504
SIC: 1389 Oil & Gas Field Services, NEC