It follows on from and replaces a funding deal and management changes in April. The £275,000 investment from Robert Bensh has now been cancelled, and, he will no longer be appointed as chairman.
OCE, an investor in the US onshore upstream sector, has instead taken up all 25mln shares at a slightly better price at 1.2p, raising £300,000 for the AIM-quoted company.
Colin Harrington, OCE’s present chief executive, will now be appointed as the new Rose Petroleum executive chairman.
"I am delighted to welcome OCE as significant shareholders in the company and I look forward to Colin Harrington joining the board as executive chairman,” said Matthew Idiens, Rose chief executive.
“I believe that Colin's extensive regional and operational expertise will be of great value to Rose as we look to optimise our portfolio and unlock additional opportunities in the upcoming months."
Harrington, meanwhile, added: "Origin Creek's mandate is to provide capital, guidance and a deep network of relationships to the companies in which we choose to invest.
“I am very excited about the opportunity to join the Rose Board at this pivotal stage in the company's development, and I look forward to working with Matt and the team in delivering value to shareholders."