Shorted

4DX vs RIO — ASX Short Interest Comparison

Side-by-side comparison of short positions for 4dmedical (ASX:4DX) and Rio Tinto (ASX:RIO), based on official ASIC short position reports as of 20 Aug 2026.

4DX is more heavily shorted, with 12.38% of shares reported as short positions against 9.90% for RIO — a gap of 2.48 percentage points.

4DX

More shorted

4dmedical

Short interest
12.38%
Reported positions
74,215,740
Industry
Health Care Equipment & Services

RIO

Rio Tinto

Short interest
9.90%
Reported positions
36,812,250
Industry
Materials

Source: official ASIC short position reports (T+4 delay). Methodology · Disclaimer — not financial advice.