Investors are likely to keep an eye on the following small-cap stocks listed on the Australian Securities Exchange.

Castillo Copper (ASX:CCZ)

Castillo Copper conducted a surface sampling campaign at the Big One deposit within the NWQ project in Queensland, revealing an anomaly indicating copper mineralization extends west along strike from historical workings and the known orebody, increasing the target area.

Cokal (ASX:CKA)

The coal company expanded its coal transport infrastructure by partnering with PT Stanley Mitra Abadi for hauling services and commissioned a semi-permanent steel bridge on the Mohing River crossing.

Nyrada (ASX:NYR)

The biotechnology company completed an in vivo micronucleus study for its lead drug candidate, NYR-BI03. The study assessed whether NYR-BI03 causes genetic damage and found no increase in genotoxicity markers in treated animals compared with control-treated animals.

Medallion Metals (ASX:MM8)

Medallion Metals started a drill program at its Ravensthorpe project in Western Australia to enhance confidence in its sulfide resource and de-risk the mine plan for near-term production.

Belararox (ASX:BRX)

The mineral explorer signed a letter of intent with Argentine company Conosur Drilling to conduct an initial diamond drilling program at the TMT project in Argentina and test key copper-gold porphyry targets at the Tambo South and Malambo project sites.

Corazon Mining (ASX:CZN)

Corazon Mining found nine electromagnetic conductors at the MacBride project in Canada after processing aerial geophysical data.