Fortune writes about Bill Gross and his start-ups:
Now the business is down to 16 companies. Its portfolio is far more diverse, including software, hardware, and web businesses. Not all the startups have products or services on the market, but those that do generate annual sales of $435 million. Gross, 47, is surprisingly different toohes starting fewer companies, expanding and financing them more cautiously, hanging on to them longer, and letting the management teams he has assembled do their jobs without meddling. Hes much more selective about when he takes an executive role; for example, he is CEO of Energy Innovations because energy is one of his lifelong passions.