Backlog is winning, Healthcare is not
- The core story improved after record Q3 FY26 revenue of $453.2 million and record non-GAAP EPS of $2.60.
- Backlog reached a record $1.9 billion, giving management more visibility into future sales.
- Security is the main business, at 70.4% of Q3 FY26 revenue, but Mexico contract changes make reported growth look slower.
- Optoelectronics is a bright spot, with Q3 FY26 revenue of $93.3 million in the filing and strong aerospace and defense demand.
- Healthcare remains the weak piece, with Q3 FY26 revenue down 6.9% year over year.
Backlog beats the margin worry
OSI Systems had a much better Q3 FY26 than the prior worry list suggested. Revenue hit a Q3 record of $453.2 million, non-GAAP EPS reached a Q3 record of $2.60, and management kept full-year FY26 guidance at $1.825 billion to $1.867 billion of revenue and $10.30 to $10.55 of non-GAAP EPS.
The biggest bull point is the order book. Backlog reached a record $1.9 billion, helped by a 1.3x book-to-bill ratio. Book-to-bill means new orders divided by revenue. A number above 1.0 means orders are coming in faster than sales are being shipped.
The story is not clean. The 10-Q still showed gross margin at 33.2% in Q3 FY26, down from 33.8% a year earlier, and Healthcare sales fell again. The stock case now depends less on whether the company can grow and more on whether it can turn backlog into cash while fixing the weaker hospital business.
Scanners, service, and components
OSI sells specialized electronic systems in three areas: Security, Optoelectronics and Manufacturing, and Healthcare. Security sells airport, port, border, and cargo inspection systems. Optoelectronics makes electronic parts and assemblies for outside customers and for OSI's own Security and Healthcare units. Healthcare sells patient monitoring and related hospital systems.
The business is better when hardware sales create years of service work. Security systems need installation, maintenance, software, and operating support. OSI also offers turnkey contracts, where it can manage technology, staffing, and operations for a customer.
Software could make the model steadier over time. CertScan is a multisite platform that links inspection systems and their data. A 5-year U.S. Customs and Border Protection contract for the platform expands OSI into a SaaS-style offering, where customers pay for software service over time.
The model can break when large government contracts slip, when a customer delays acceptance, or when product mix hurts margins. The Mexico contract transition is a good example: equipment revenue is falling as that work shifts toward service, which can make reported growth look weaker even when core demand is healthy.
What OSI actually sells
Rapiscan security screening systems
This includes baggage, checkpoint, cargo, vehicle, and border inspection equipment. Products include the RTT 110, Orion 920CT, and Eagle cargo inspection systems.
CertScan integration platform
CertScan connects inspection systems and data across many sites. The 5-year CBP award gives OSI a path to more recurring software revenue.
Turnkey security services
OSI can run screening operations for customers, not only sell the machines. This creates service revenue tied to the installed base.
Radio frequency products
The Security division also includes radio frequency broadcast, scientific, and industrial equipment. The recently acquired RF business added scale and management cited record quarterly revenue from it.
Optoelectronics and manufacturing
This unit makes components, flex circuits, and electronic assemblies for outside customers and OSI's own divisions. Demand has been helped by aerospace and defense markets.
Spacelabs Healthcare
Spacelabs sells patient monitors, central stations, cardiology products, remote monitoring, and the Rothman Index analytics tool. It is the lagging segment right now, but a recovery would help the full company.
Security carries the mix
Segment mix uses Q3 FY26 revenue from the March 31, 2026 Form 10-Q. Security was 70.4% of revenue, so government and border security spending have a large effect on the whole company.
What could go wrong
Healthcare keeps shrinking
Medium impact · High oddsHealthcare revenue fell 6.9% year over year in Q3 FY26, mainly from lower patient monitoring sales and service. Management says order timing in the U.S. is a problem, but repeated misses would make this look like a demand issue, not timing.
Backlog converts slower than expected
High impact · Medium oddsThe $1.9 billion backlog is the main bull point. But backlog is not the same as revenue. Large defense and security awards can depend on customer acceptance, funding, and delivery timing.
Mexico cash collection slips
Medium impact · Medium oddsA key cash catalyst is collection of a $74 million receivable from Mexico. If that cash comes in late, free cash flow could disappoint even if earnings look fine. This matters because large government contracts can create big swings in working capital.
Government budgets delay orders
High impact · Medium oddsA U.S. government shutdown already delayed some expected Security orders in Q2 FY26. OSI sells into public safety, customs, border, and defense markets, so budget fights can slow bookings. The Golden Dome IDIQ award is a large long-term opportunity, but no single order is guaranteed.
Margins stay under pressure
Medium impact · Medium oddsQ3 FY26 gross margin was 33.2%, down from 33.8% a year earlier. The filing points to revenue mix as the reason. If the mix does not improve, full-year EPS guidance may be harder to hit.
In one breath
What does OSI Systems do?
OSI Systems makes security inspection equipment, electronic components, and hospital monitoring systems. Its best-known security brand is Rapiscan Systems.
Why does OSI Systems backlog matter?
Backlog is work that has been ordered but not yet recorded as revenue. OSI's backlog reached $1.9 billion, which gives better visibility if the company can deliver the work on time.
What is the main risk for OSI Systems stock?
The biggest company-specific risk is execution. OSI must convert a large backlog into revenue and cash while stopping the decline in Healthcare.
Is OSI Systems mainly a defense company?
Defense is important, especially in Security and Optoelectronics, but OSI is broader than defense. It also sells airport and border scanners, electronic manufacturing services, and hospital monitoring systems.