Biggest ASX share price moves in August 2025, and why
In August 2025, 165 ASX share moves had a cause we could name. The biggest rise was Electro Optic (EOS) at +43.4%, on contract news. The biggest fall was Peninsula (PEN) at −28.3%, on unknown news. Moves are the explained ones the site flagged that month, by the size of the day's move as it ended; the kind of news is the platform's reading of the news that day. General information only, not financial product advice.
Biggest rises (104 in the month)
- EOSElectro OpticContract · 5 Aug+43.4%
- BBNBaby BuntingOperational · 15 Aug+40.5%
- AYAArtryaRegulatory · 21 Aug+37.7%
- LINLindian Res.Operational · 12 Aug+37.0%
- LINLindian Res.Contract · 6 Aug+33.0%
- IELIDP EducationShort Interest · 28 Aug+29.7%
- TUATuasTakeover / M&A · 12 Aug+29.6%
- 4DX4DMedicalStake Change · 1 Aug+27.1%
- TAHTabcorpEarnings Beat · 27 Aug+23.9%
- RDXRedoxUnknown · 21 Aug+23.8%
Biggest falls (61 in the month)
- PENPeninsulaUnknown · 26 Aug−28.3%
- JHXJames HardieEarnings Miss · 20 Aug−27.8%
- SYRSyrah Res.Unknown · 1 Aug−25.3%
- SKCSkycity Ent.Capital Raise · 22 Aug−24.6%
- DMPDomino's PizzaEarnings Miss · 27 Aug−22.0%
- AD8AudinateGuidance Down · 18 Aug−20.8%
- INGInghamsOperational · 22 Aug−20.3%
- IPHIPHEarnings Miss · 21 Aug−19.5%
- TLXTelix PharmaRegulatory · 28 Aug−18.8%
- GYGGuzman Y GomezEarnings Miss · 22 Aug−18.2%
Top 10 each way. Percentages are the move on the day it was flagged.
What kind of news
- Earnings Beat35 moves
- Earnings Miss32 moves
- Operational22 moves
- Sector Flow22 moves
- Unknown12 moves
- Capital Raise7 moves
- Contract7 moves
- Takeover / M&A7 moves