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

RareX (ASX:REE)

The rare earths company signed a site access agreement with mining firm AngloGold Ashanti for exploration license E39/2504, part of the Khaleesi project in Western Australia. The agreement includes the use of the Tropicana access road for exploration activities.

Namoi Cotton (ASX:NAM)

The cotton processing company said Louis Dreyfus extended the closing date of its takeover offer for the company to Sept. 27.

Neometals (ASX:NMT)

Neometals completed a maiden assessment on the potential gold endowment at its Barrambie project in Western Australia using historical data from previous explorers.

Memphasys (ASX:MEM)

The biotechnology company filed a patent for its antioxidant assay system, RoXsta, for oxidative stress assessment.

Lunnon Metals (ASX:LM8)

Lunnon Metals' chief financial officer Hayden Bartrop is resigning, effective Nov. 9. The company will not search for a successor amid efforts to cut corporate costs.

Labyrinth Resources (ASX:LRL)

Labyrinth Resources appointed Charles Hughes as chief executive, succeeding Jennifer Neild, who will become chief development officer.