Electro Optic (EOS) is held by 15 ASX ETFs. Over the last year it rose 35.0%: on $10,000, +$3504. We explain 31 big moves in that time.
About EOS
- SectorIndustrials
- IndustryCapital Goods
- Size$2.5b
- Held by15 ETFs
- Big moves31 in 1Y
Each dot is a move we explain. Tap one, or a row of Why it moved, to see what caused it.
Why it moved
- +12.6%25 Aug 2026· Earnings Beat
Electro Optic Systems surged after reporting a 283% revenue jump and an $846 million order book in its 1H 2026 half-year results, significantly exceeding market expectations.
- +9.7%31 Jul 2026· Sector Flow
EOS shares surged 10.8% amid a broader rally in Australian defence stocks driven by renewed geopolitical tensions and rising defence spending, with company-specific catalysts including an expanding order pipeline and improving cash conversion.
- −8.5%30 Jul 2026· Unknown
The stock dropped for unclear reasons, likely technical/sector flows, but the news around the date shows prior bullish analyst optimism and a subsequent 10.8% rebound.
- +8.4%27 Jul 2026· Guidance Up
EOS posted record half-year revenue of A$169m and a record A$846m order book, raising FY26 guidance on the same day as the price move.
- +14.1%19 Jun 2026· Contract
Electro Optic Systems announced a new US$124 million counter-drone order and a Middle East joint venture for laser weapons and remote weapon stations, driving the stock up 14.13%.
- +16.2%29 May 2026· Contract
EOS shares surged following the announcement of a major deal with MARSS, a capital raise, and the appointment of former senior defence leaders to its board.
- +10.7%23 May 2026· Capital Raise
The stock rose 10.72% on May 22, 2026, likely recovering from a capital-raise driven selloff earlier in the week, supported by completion of the MARSS acquisition and a new strategic investment.
- −10.3%20 May 2026· Capital Raise
Electro Optic Systems shares fell sharply after announcing a $150 million placement and $40 million strategic placement, causing dilution concerns.
- −9.7%23 Mar 2026· Stake Change
EOS shares fell sharply following a period of insider selling by company directors, which spooked investors.
- +9.0%18 Mar 2026· Stake Change
Following a strong rally with shares up 80% over the last month and near all-time highs, the stock experienced a notable pullback as insider selling followed an options exercise.
- −17.0%17 Mar 2026· Stake Change
Insider selling following option exercises triggered a sharp pullback in EOS shares after a strong rally.
- −8.7%16 Mar 2026· Sector Flow
EOS shares pulled back from a recent high after a rally pause, following new counter-drone orders.
- +18.3%13 Mar 2026· Contract
Electro Optic Systems announced new Middle East and US counter-drone system orders worth $45 million on 13 March 2026, driving the stock up 18.35%.
- +8.7%10 Mar 2026· Sector Flow
Analyst reports and growth stock commentary highlighted EOS's momentum and potential, coinciding with a sector-wide interest in defence technology stocks on a day when broad markets fell due to an oil shock.
- +13.2%25 Feb 2026· Operational
EOS shares surged 13-17% following publication of a strong order book update and optimism about future growth, with further support from a broker target price upgrade.
- +13.7%17 Feb 2026· Sector Flow
Sector-wide buying interest in ASX defence stocks, with peer Austal shares soaring 20% on the same Monday, lifted EOS shares in sympathy.
- −7.8%12 Feb 2026· Short Interest
EOS shares fell on February 11, 2026, likely due to continued fallout from a scathing short seller report by Grizzly Research, despite the company's rebuttal.
- +11.8%10 Feb 2026· Short Interest
EOS shares rose after the company responded to and rejected a Grizzly Research short-seller report, recovering from an initial selloff.
- −16.3%6 Feb 2026· Short Interest
A negative short-seller research report from Grizzly Research questioning the legitimacy of a Korean contract triggered a sharp sell-off and trading halt.
- −8.5%29 Jan 2026· Sector Flow
Likely part of a broader sell-off in ASX defence tech stocks on the day, which coincided with a Motley Fool article noting the stock was down 10% in a week.
- +10.3%13 Jan 2026· Takeover / M&A
EOS announced a $228m acquisition of MARSS, a European counter-drone C2 system provider.
- +7.8%23 Dec 2025· Sector Flow
Broad sector attention on ASX defence stocks following triple-digit gains, with positive commentary suggesting 2026 could be massive for EOS.
- +16.8%19 Dec 2025· Contract
EOS shares surged after the company announced a new $32 million US weapons deal (RWS order) for a North American customer.
- +16.6%16 Dec 2025· Contract
EOS announced a conditional high energy laser contract and a major $120M Asia military contract, driving the stock up sharply.
- +28.9%15 Dec 2025· Contract
Electro Optic Systems announced a major conditional high energy laser contract, likely the $120M Asia military deal, driving the stock up.
- −11.5%5 Nov 2025· Sector Flow
The 15% decline over the past week, including the abnormal price move, appears to be the result of a broader sector-wide sell-off in defence stocks, though no specific company announcement is cited in the available news.
- +8.7%27 Oct 2025· Sector Flow
Drone-related terrorism concerns in Europe drove investors toward Australian defence technology stocks, lifting EOS.AX.
- +8.0%23 Oct 2025· Unknown
Insufficient evidence to determine the cause of the price movement.
- −9.4%17 Oct 2025· Sector Flow
Broad sector-wide surge in ASX defence stocks, not company-specific news, likely led to profit-taking in EOS.AX after previous gains, causing the drop.
- −9.9%15 Oct 2025· Sector Flow
Stock fell amid a sector-wide surge in defence stocks, likely due to profit-taking or rotation after a recent run-up, with no company-specific news.
- −10.4%14 Oct 2025· Sector Flow
No specific catalyst identified; the move likely reflects broader sector volatility or profit-taking in a hot defence sector.
Held by 15 ETFs
Of every $10,000 in each fund, how much is in EOS today.
- ISOiShares S&P/ASX Small Ordinaries ETF$770.77%
- SSOSTATE STREET SPDR S&P/ASX SMALL ORDINARIES ETF$770.77%
- VSOVanguard MSCI Australian Small Companies Index ETF$350.35%
- OZXXGlobal X Australia ex Financials & Resources ETF$270.27%
- ARMRBetaShares Global Defence ETF$230.23%
- EX20BetaShares Australian Ex-20 Portfolio Diversifier ETF$220.22%
- GEARBetaShares Geared Australian Equities Complex ETF$180.18%
- MTUMBetaShares Australian Momentum ETF$110.11%
- STWSTATE STREET SPDR S&P/ASX 200 ETF$8.550.09%
- A300Global X Australia 300 ETF$8.510.09%
Why did EOS fall 9.9% on 15 Oct 2025?
Electro Optic
Stock fell amid a sector-wide surge in defence stocks, likely due to profit-taking or rotation after a recent run-up, with no company-specific news.
The news articles around the date highlight a broad surge in ASX defence stocks, not specific to EOS. The price move aligns with sector flow dynamics, but there is no direct company announcement or specific negative catalyst mentioned. The lack of specific news for EOS and the general sector context suggests a sector-driven move, though confidence is limited by the absence of explicit negative info.
General information only, not personal advice — prepared without regard to your objectives, financial situation or needs. Past performance is not indicative of future performance.
Evidence
News coverage
What it did to the 15 ETFs holding EOS
On $10,000 in each fund, at the weight it holds today
- ISO0.77% of the fund−$8
- SSO0.77% of the fund−$8
- VSO0.35% of the fund−$3
- OZXX0.27% of the fund−$3
- ARMR0.23% of the fund−$2
- EX200.22% of the fund−$2
- GEAR0.18% of the fund−$2
- MTUM0.11% of the fund−$1
- STW0.09% of the fund−$1
- A3000.09% of the fund−$1
The 10 that hold it most. All 15 are listed on the page under Held by.