| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2021 Drilling Fund LP | 1856119 | 12/22/2021 | D/A | $100,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2021 Drilling Fund LP | 1856119 | 12/22/2021 | D/A | $100,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2022 Drilling Fund LP | 1935689 | 10/11/2022 | D/A | $150,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2022 Drilling Fund LP | 1935689 | 11/14/2022 | D/A | $150,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2022 Drilling Fund LP | 1935689 | 12/28/2022 | D/A | $250,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2023 Drilling Fund LP | 1970564 | 06/09/2023 | D/A | $300,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2023 Drilling Fund LP | 1970564 | 06/22/2023 | D/A | $300,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2019 A Drilling Fund LP | 1781953 | 11/26/2019 | D/A | $200,000,000 | $80,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | Strategic Energy Income Fund V LP | 1699602 | 11/08/2017 | D/A | $50,000,000 | $75,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2017 B Drilling Fund LP | 1708903 | 01/04/2018 | D/A | $100,000,000 | $75,000 |
