Electro Optic Systems (ASX: EOS) A$726m Backlog Puts FY27 Upside in Focus

FY26 Guide Shows the Backlog Is Starting to Convert

It has been a couple of months since we last covered Electro Optic Systems (ASX:EOS).

In our first report, we noted that EOS announced US$45 million in counter-drone orders in March. Then, in May, the company completed the acquisition of MARSS and disclosed a combined order book of A$726 million, including a new A$85 million MARSS contract with a Middle Eastern customer.

That marks a quick turnaround in MARSS generating contract value under EOS ownership. Today, we have seen the first signs of revenue guidance for Electro Optic Systems, giving investors a clearer view of how this backlog could begin converting into reported revenue.

EOS is up 233% over the past year, although it has been a volatile ride. However, the company now has significantly more visibility than it did only a few months ago. EOS is sitting on a A$726 million contract backlog, with around 70% expected to convert into revenue across FY26 and FY27.

What the Market Update Tells Us

Management has been explicitly confident that demand across its product suite remains at “elevated levels”, reiterating that the pipeline has not cooled.

The ongoing conflicts in the Middle East and Europe remain key demand drivers, as nations look to strengthen their defence systems as a precautionary measure. EOS is now better positioned to capture that demand, with the ability to offer a broader counter-drone solution across both hardware and software, rather than only supplying individual components.

The core reason the market has been building cyclical enthusiasm & pessimism around EOS is that defence contracting cycles are typically slow. Enquiry-to-order conversion can often take six to 12 months, meaning elevated enquiry levels today can translate into revenue well into future periods.

With EOS now receiving strong enquiry levels and sitting on a A$726 million order book, the company’s revenue runway into 2027 and beyond is becoming increasingly visible.

New Division Integrating, But Revenue Timing Uncertain

MARSS is a software-led counter-drone and critical infrastructure protection business built around its NiDAR command and control platform.

The business already came with significant contract value, including a major Middle Eastern customer contract worth approximately A$160 million. MARSS’s NiDAR systems integrate radar, sensors and counter-drone missile systems, making it a more complete end-to-end solution rather than a standalone hardware product.

However, EOS has not yet provided the market with clear visibility on how much of the MARSS contract backlog will convert into revenue in 2026.

This is where the key risk sits. If supply chain delays occur, particularly around delivery timelines, equipment availability or integration, revenue recognition could be pushed out. This is the area the market has been more cautious on.

That said, this is not unique to EOS. Defence contracts are complex, timelines can shift, and delays are a normal feature of the broader defence industry. The key question for investors is whether the backlog continues to convert steadily over FY26 and FY27.

Unpacking the $240M–$270M Guide

For FY26, management has set revenue guidance of A$240 million to A$270 million. Importantly, this guidance is derived solely from the order book that is already locked in and excludes new orders that are not yet fully secured.

This gives the guidance a stronger level of visibility, but it also means a large portion of the current backlog is still expected to convert beyond FY26. In our view, FY27 is where the majority of the value sits, as more of the existing order book begins to flow through into revenue.