It might be seeking to raise up to $300 million in new funding in the future.Quantum-Si's (QSI -4.31%) shares weren't quite the picture of health as the trading week came to an end. Investors, concerned about the healthcare technology company potentially making dilutive secondary share issues, traded out of the stock to leave it with a nearly 5% loss on the day. Sitting on the shelfLate Thursday, Quantum-Si filed a shelf registration -- a regulatory document stating that a company aims to raise capital over ...