| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2016 Drilling Fund LP | 1681337 | 11/18/2016 | D/A | $100,000,000 | $45,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2017 A Drilling Fund LP | 1708870 | 11/06/2017 | D/A | $75,000,000 | $40,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2016 Drilling Fund LP | 1681337 | 11/18/2016 | D/A | $100,000,000 | $30,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2021 Drilling Fund LP | 1856119 | 10/05/2021 | D/A | $100,000,000 | $30,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | Strategic Energy Income Fund V LP | 1699602 | 08/04/2017 | D/A | $50,000,000 | $25,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | Strategic Energy Income Fund V LP | 1699602 | 09/20/2017 | D/A | $50,000,000 | $25,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2017 A Drilling Fund LP | 1708870 | 10/04/2017 | D/A | $75,000,000 | $25,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2017 A Drilling Fund LP | 1708870 | 10/25/2017 | D/A | $75,000,000 | $25,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2017 A Drilling Fund LP | 1708870 | 11/08/2017 | D/A | $75,000,000 | $25,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2017 B Drilling Fund LP | 1708903 | 11/08/2017 | D/A | $100,000,000 | $25,000 |
