Quantum Raises $10B for Oil, Gas, Midstream, Energy Transition / Latest / By mark Quantum Capital Group raised $5.25 billion for its private equity flagship, Quantum Energy Partners VIII. A source told Hart Energy that most of the firm’s capital has gone into oil and gas because it offers the best risk-adjusted returns. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Related