Troilus drills 3.38 g/t AuEq over 22 m at Z87 Reserve Pit

*3.38 G/T AUEQ (2.97 G/T AU, 1.80 G/T AG, 0.29 % CU) OVER 22 M, 0.95 G/T AUEQ (0.80 G/T AU, 1.11 G/T AG, 0.10 % CU) OVER 129.05 M

MONTREAL, Sept. 17, 2026 (GLOBE NEWSWIRE) -- Troilus Mining Corp. (“Troilus” or the “Company”) ( TSX: TLG; OTCQX: CHXMF; FSE: CM5 ), is pleased to announce the fourth batch of results from the Z87 optimization drill program at its Troilus Gold-Copper Project located in north-central Quebec, Canada. The results reported include nine drill holes totaling 4,728 metres, and form part of the 2026 exploration program outlined in the Company’s March 31, 2026 press release .

The ongoing Z87 optimization program is is targeting Inferred material and historically unsampled intervals within and around the current Z87 Reserve pit, with the objective of identifying opportunities to improve the mine plan presented in the Company’s Technical Report on September 9 th , 2026 .

Importantly, the current Mineral Resource and Mineral Reserve estimates have an effective date of December 31, 2025, and therefore exclude all drilling completed in 2026. The results reported today continue to demonstrate mineralization in areas currently classified as Inferred or, in some cases, treated as waste in the existing block model, creating potential opportunities for resource conversion, pit and mining sequence optimization, strip ratio improvements and enhanced early-year mill feed.

Z87 Intercept Highlights:

Hole 87-26-485 intersected 0.95 g/t gold equivalent (“AuEq”) (0.80 g/t Au, 1.11 g/t Ag, 0.10% Cu) over 129.05 m, including 3.38 g/t AuEq (2.97g/t Au, 1.80 g/t Ag, 0.29 % Cu) over 22 m starting at 398 m downhole from an area of inferred material within the Z87 reserve pit (see Figures 1 and 2).

Hole 87-26-531 intersected 0.99 g/t gold equivalent (“AuEq”) (0.84 g/t Au, 1.20 g/t Ag, 0.10 % Cu) over 74.3 m, including 3.15 g/t AuEq (2.73 g/t Au, 1