| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2016 Drilling Fund LP | 1681337 | 11/18/2016 | D/A | $100,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | Strategic Energy Income Fund V LP | 1699602 | 10/04/2017 | D/A | $50,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2017 A Drilling Fund LP | 1708870 | 11/08/2017 | D/A | $75,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2017 B Drilling Fund LP | 1708903 | 01/04/2018 | D/A | $100,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2018 B Drilling Fund LP | 1739763 | 01/09/2019 | D/A | $100,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2019 A Drilling Fund LP | 1781953 | 10/22/2019 | D/A | $200,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2019 A Drilling Fund LP | 1781953 | 11/07/2019 | D/A | $200,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2019 B Drilling Fund LP | 1781949 | 01/02/2020 | D/A | $200,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2021 Drilling Fund LP | 1856119 | 10/06/2021 | D/A | $100,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2021 Drilling Fund LP | 1856119 | 10/14/2021 | D/A | $100,000,000 | $100,000 |
