| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | Mewbourne Energy Partners 16-A, L.P. | 1670346 | 07/06/2016 | D | $160,000,000 | $180,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | NATIONWIDE PRIVATE PLACEMENT VARIABLE ACCOUNT | 1135856 | 07/21/2014 | D | $183,968 | $153,306 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2021 Drilling Fund LP | 1856119 | 11/23/2021 | D/A | $100,000,000 | $150,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2016 Drilling Fund LP | 1681337 | 11/02/2016 | D/A | $100,000,000 | $100,000 |
| CAMBRIDGE INVESTMENT RESEARCH, INC. | 39543 | USEDC 2016 Drilling Fund LP | 1681337 | 11/02/2016 | D/A | $100,000,000 | $100,000 |
| 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 |
