X0609 4 2026-09-10 0 0001075415 DIVERSIFIED HEALTHCARE TRUST NASDAQ:DHC 0001806557 Bilotto Christopher J. false C/O THE RMR GROUP LLC TWO NEWTON PL., 255 WASH. ST., STE. 300 NEWTON MA 02458 1 1 0 0 President and CEO 0 Common Shares of Beneficial Interest 2026-09-10 4 A 0 59681 A 339184.96 D Transaction reported is award of shares pursuant to the Issuer's equity compensation plan. Since the Reporting Person's last report, he has discontinued participation in the Issuer's dividend reinvestment plan, and 256.99 shares previously acquired through the dividend reinvestment plan are now held directly, and 0.475 fractional shares were sold for cash. /s/ Christopher J. Bilotto 2026-09-14