Acuity Brands (AYI): Q3 FY2026 results, our verdict

2026-06-28 · By Lubin Danilo, founder of Lubin Investment

Acuity Brands delivered an excellent Q3 FY2026: earnings per share of $5.31 versus $5.16 expected, operating profit up 38.3%, free cash flow margin at 20%. This business scores 9 of our 10 quality criteria. But at $362, the stock trades at 19 times its annual free cash flow, against my calculated buy price of $277. Outstanding company, not yet at my price.

What Acuity Brands actually does

Acuity Brands is the leading US provider of connected lighting systems and intelligent building management. In practice, the group makes and sells LED luminaires, lighting control systems, occupancy sensors and software platforms that allow commercial, industrial and public buildings to automatically manage their energy consumption. The flagship segment is ABS (Acuity Brands Lighting and Lighting Controls), which accounts for the majority of revenue. The ISG (Intelligent Spaces Group) segment is growing fast on software and data.

What I like about this business is its positioning on the LED transition in commercial buildings. This replacement cycle is long, structural, and Acuity is the reference supplier in the United States. Large retail chains, university campuses, hospitals, logistics warehouses: they all need to upgrade their lighting, and many choose Acuity. I developed this thesis in detail in my pre-results analysis published on June 25.

A close look at the Q3 FY2026 numbers

For Q3 FY2026, Acuity reported adjusted EPS of $5.31, fifteen cents above the analyst consensus of $5.16. Revenue reached $1.08 billion, up 5% year-over-year. But the most remarkable figure is the adjusted operating profit growth: +38.3% year-over-year. That is a significant margin jump that shows Acuity is not just growing in volume, it is also improving its operating profitability.

Free cash flow generation (the money genuinely available once every cost is paid) remains excellent, with a 20% margin over the last twelve months. That is the level of a very well-run business in an industrial sector. For comparison, most industrial manufacturers run between 5% and 12% FCF margin.

What our 10 criteria reveal about quality

When I analyze a company, I always start from the fundamentals, not the stock price. For that, I have codified ten financial criteria: profitability, revenue growth, free cash flow growth, share buybacks, debt level, return on capital, balance sheet quality. Acuity Brands passes 9 of these 10 criteria. That is one of the top scores across our entire covered universe.

The strengths are numerous and concrete. Five-year revenue growth is +11.3% per year, above my 10% threshold. Five-year free cash flow per share growth is +22.5% per year, very strong. Net margin is 13.2%. The share count is shrinking: -4.97% per year over five years, meaning each share you hold represents a growing slice of future earnings. Customer payment delays are short. Return on invested capital is high.

The one criterion not passed concerns debt level, which remains manageable but slightly above my conservative threshold. This is not a red flag, it simply means I want a safety margin on the balance sheet. No other negative signal in the case.

Acuity's moat: distribution, brands, and data

Acuity Brands' moat rests on three pillars. First, its US distribution network: Acuity sells through independent manufacturer representatives and electrical distributors present nationwide. This network is dense, established over decades, and difficult for a foreign competitor to replicate quickly. Second, its brands: Lithonia Lighting, Holophane, Juno, and about twenty others recognized by electricians and architects. Third, data: the ISG division collects energy performance data from equipped buildings, creating a recurring software relationship with customers.

This moat is not indestructible. Competition from Asian manufacturers on basic LED products is real. Signify (Philips) and Eaton remain serious rivals in the institutional segment. But Acuity defends its turf well through the perceived quality of its products, the density of its distribution network, and the head start taken on the software side with ISG.

Valuation: too expensive for me today

Excellent quality does not mean good price. That is the most important distinction in my approach. I can admire a business while refusing to buy it at any valuation. To measure price, I mainly use the P/FCF (price to free cash flow): the share price divided by the company's annual free cash flow. The lower this ratio, the cheaper the stock.

At $362.48 per share, Acuity currently trades at 19.25 times its annual free cash flow. Applying my prudent assumptions about future growth, my reasonable buy price comes out at $276.64. The stock trades 31% above that level. That is not extreme for a company of this quality, but it is not an outright opportunity either. My method requires a margin of safety. At $362, that margin is insufficient.

For subscribers who have been following since the June 25 pre-results analysis, nothing has fundamentally changed in the thesis. The results confirm the quality of the business. They do not justify buying at the current valuation, but they strengthen my conviction on the case for when the price gets there.

My verdict: on the watch list, not in the portfolio

Acuity Brands is one of the best companies I cover. A 9/10 score, double-digit growth, a 20% FCF margin, consistent buybacks, sector leadership in the United States: all of that deserves respect. If this company were trading at $200 or $250, I would be a buyer without hesitation.

But at $362, I pass. My buy price is $277. The gap is 31%. To buy despite that gap, I would have to give up my margin of safety, which I do not do. I flag Acuity Brands as a high-conviction watch list name, with a target entry price around $277 to $300. If the market gives the opportunity, I will be there.

To see my full calculations and track Acuity Brands' valuation in real time, the dedicated page is on my site: full Acuity Brands analysis (/analyse/AYI). And to understand the criteria I use to calculate my buy price, I have explained everything in our investment methodology guide (/methodologie).

What I am watching going forward

Three things interest me particularly in coming quarters. First, the ISG division's trajectory: if intelligent building management software accelerates, that could structurally justify a higher valuation. Second, US new construction dynamics: the high-rate environment has slowed building permits, and any easing there would benefit Acuity. Third, the ability to sustain operating margin: a +38% jump in one year is remarkable, and I want to see whether that level holds.

FAQ

Is Acuity Brands a good stock to buy after its Q3 FY2026 results?

Acuity Brands is a very high-quality company (9 of our 10 criteria passed). But at $362, it trades at 19x free cash flow, 31% above our buy price of $277. We are watching without buying for now. This is not investment advice.

What is free cash flow and why does it matter for Acuity?

Free cash flow (FCF) is the money left in the company's treasury after paying all operating and capital expenses. It is what the company can use to buy back shares, pay a dividend, reduce debt or make acquisitions. For Acuity, FCF represents 20% of revenue, which is excellent in the industrial sector.

What is Acuity Brands' competitive moat?

Acuity Brands benefits from a dense US distribution network, around twenty recognized brands (Lithonia, Holophane, Juno), and a head start in building management software through its ISG division. These advantages are difficult for a foreign competitor to replicate quickly.

At what price would Acuity Brands be a buying opportunity?

Our reasonable buy price is calculated at $276.64. Between $277 and $300, the case would become very interesting by our method. At $362 (current price), the margin of safety is insufficient. Do your own research.

What is P/FCF and how do you use it to value a stock?

P/FCF (price to free cash flow) measures how many years of free cash flow you are paying when you buy the stock today. A P/FCF of 19 means you are paying 19 years of current free cash flow. The lower the P/FCF, the cheaper the stock. For Acuity, our target buy price corresponds to a P/FCF of about 13x.

Voir l'analyse AYI sur Lubin Investment

About the author

Written by Lubin Danilo, founder of Lubin Investment. A self-taught individual investor, I find fundamental analysis fascinating, and it has delivered excellent results. For three years now, my performance has beaten the S&P 500. But analyzing every stock took too much time: sites with incomplete data, calculation methods and criteria never aligned with mine. And spotting the best stocks was just as time-consuming, even with my own well-defined checklist. So I put my software development background to work to build this software, base my investment strategy on its results, and share it with people who share the same passion as me. It judges a company's quality and its price separately, using criteria drawn from the financial literature (Warren Buffett, Michael Mauboussin, Aswath Damodaran).