Man Group PLC disclosed a 2.51% interest in Senior Plc through 10,546,619 cash-settled derivatives, under Rule 8.3 of the Takeover Code. The position was held on September 10, 2026, with the filing dated September 11. The disclosure also records an equity swap that increased a long position tied to 41,627 Senior Plc ordinary shares at £2.9455 per unit. Man Group said it had no disclosures involving another offer participant and reported no indemnity arrangements, derivative-related agreements or supplemental open-position filing.