Oil and Gas Field Exploration Services - Latest Activist Disclosures

This table shows recent activist investor (Schedule 13D) filings made in this industry. Any investor or hedge fund that makes an investment with the intention of influencing management is considered an activist investor and must file a 13D.

Date Form Target Company Investor Shares Ownership
(Percent)		 Ownership Change
(Percent)
2026-01-05 13D/A DWSN / Dawson Geophysical Company Wilks Dan H. 24,658,746 79.42 0.00
2025-11-26 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC 37,576,821 32.30 23.10
2025-10-29 13D/A DWSN / Dawson Geophysical Company Wilks Dan H. 24,658,746 79.42 -0.00
2025-06-27 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC 30,526,321 28.00 0.00
2024-06-04 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC 30,526,321 32.58
2024-01-23 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC 22,526,321 26.29
2023-11-17 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC 20,425,206 24.48
2023-10-30 13D/A DWSN / Dawson Geophysical Company Wilks Dan H. 24,659,095 80.03 30.84
2023-06-29 13D/A DWSN / Dawson Geophysical Company Wilks Dan H. 18,847,330 75.40
2023-01-20 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC
2022-01-28 13D/A DWSN / Dawson Geophysical Company Wilks Brothers, LLC 17,641,596 74.61 742.25
2022-01-14 13D/A DWSN / Dawson Geophysical Company Wilks Brothers, LLC 2,094,586 8.86 -8.21
2021-10-25 13D/A DWSN / Dawson Geophysical Company Wilks Brothers, LLC 2,281,946 9.66 0.00
2021-10-08 13D DWSN / Dawson Geophysical Company Schneider John M. 1,275,000 5.40
2021-01-19 13D DWSN / Dawson Geophysical Company Wilks Brothers, LLC 2,281,946 9.72 25.84
2019-02-11 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC
2017-11-14 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC
2017-11-13 13D/A NSFDF / NXT Energy Solutions Inc. Mork Capital Management, LLC 5,644,420 9.72
2015-10-15 13D NSFDF / NXT Energy Solutions Inc. Tilson John S. 2,793,748 5.20
2015-09-30 13D NSFDF / NXT Energy Solutions Inc. Liszicasz George 15,202,490 28.60
2015-03-10 13D KKPT / KoKo Petroleum Inc. Yajnik Manoj 3,105,000 8.82
2013-08-19 13D RTSO / RTS Oil Holdings, Inc. Ramle Investments Ltd. 2,331,167 7.00
2013-08-01 13D RTSO / RTS Oil Holdings, Inc. Gavrielov Rafael Zaemonovich 20,980,500 62.90
2013-05-17 13D/A DLTA / Delta Oil & Gas, Inc. Bolen Douglas Nelson 1,986,000 12.70
2013-05-17 13D/A DLTA / Delta Oil & Gas, Inc. Sandher Kulwant 1,834,176 11.70
2013-02-08 13D/A DLTA / Delta Oil & Gas, Inc. Paton Gay Christopher 1,943,932 13.20
2013-02-08 13D/A DLTA / Delta Oil & Gas, Inc. Bolen Douglas Nelson 1,886,000 12.80
2013-02-08 13D/A DLTA / Delta Oil & Gas, Inc. Sandher Kulwant 1,734,176 11.80
2012-03-23 13D/A DLTA / Delta Oil & Gas, Inc. Paton Gay Christopher 1,843,932 12.50
2012-03-23 13D/A DLTA / Delta Oil & Gas, Inc. Bolen Douglas Nelson 1,786,000 12.20
2012-03-23 13D/A DLTA / Delta Oil & Gas, Inc. Sandher Kulwant 1,634,176 11.10