According to Yahoo Finance analysis, Johnson & Johnson's latest 13F filing (as of June 30, 2026) disclosed its holdings of 15 stocks in the biotechnology and medical technology sectors. The analysis indicates that Johnson & Johnson's largest investment is in Protagonist Therapeutics, amounting to approximately $300 million. Protagonist Therapeutics had one product launched in the US in March 2026, and the FDA approval decision for another product, rusfertide, is expected in August 2026. As of August 28, 2026, Protagonist Therapeutics' stock price has risen by 65% year-to-date.