CSW Industrials
A industrial compounder with temporary headwinds.
Key information
Ticker: CSW 0.00%↑
Market cap: $4.4 billion
Net-debt (Post MARS acquisition): ~$591 million
EV/EBITDA: ~16x post-Mars acquisition.
10 Y revenue CAGR: 13%
10 Y EBITDA CARG: 16.5%
Estimated 3 year upside: ~12% - 78%
Overview
I try to invest in companies that I would be happy to own privately. CSW passed the test a few years ago but its was richly valued so I didn’t pull the trigger but instead decided to watch the company from the sidelines. The stock is down 35% - 40% from ATH and many, including me, are wondering if this is an opportunity to buy an under the radar quality industrial growth company with a disciplined m&a strategy.
CSW acquires niche industrial businesses that benefit from its broad distribution channels. The investment thesis largely rest on the growth of its RectorSeal Brand within its Contractor Solutions segment, which will make up 80% of revenue after the recent MARS acquisition. While the segment was only formalized in 2022, the company has been building this segment aggressively since 2019.
History
CSW is a 2015 spin-off from Capital Southwest Corporation, which is a long-term private equity-style investment company with a permanent capital base, from which I would like to think CSW gets some of its DNA. While Capital Southwest is not a traditional PE fund with outside partners, its behavior is very similar as it engages in buying, building, and exiting businesses. Joseph Armes, was previously the CEO of Capital Southwest and became CSW’s CEO after the spin. He has done a phenomenal job leading CSW since. He’s little-known in the investment world, but he has decades of experience in mergers & acquisitions and private-equity-style investing.
The spin-off created pure play industrial growth platform with plenty of cash flow to consolidate other niche industrial businesses. CSW has evolved from a holding of random industrial lubricant and safety brands to an aggressive industrial compounder focused on the plumbing and HVAC/R markets. It’s a synergy driven consolidator as it looks to integrate and enhance the businesses its acquires and cross-sell new products through its diversified distribution channels. The company also commits to continuous improvements and cost optimization. So far, CSW has invested $1.7 billion in 20 acquisitions and returned the remaining capital to shareholders.
The company has wide brand recognition and dominant positions in the plumbing and HVAC market, and the recent acquisition of Aspen Manufacturing and MARS Parts broadened their HVAC portfolio into areas that could be promising.
My basic thesis for this company is that it could potentially be an early Carlisle, or RPM type consolidator. It now trades at a somewhat reasonable valuation and could continue to grow nicely once it gets through the industry slump.
Segments
CSW has 3 segments
Contractor solutions: This segment drives both growth and margin for the company and has been the focus of the majority of capital since going public. CSW has expanded margins while increasingly organized itself around this segment, under the brand RectorSeal. It will make up 78.9% of revenue (post-MARS acquisition), and almost half of organic growth in 2025 came from this segment. Adj. EBITDA margin is 32%. It’s no surprise that the stock has been down, given that organic growth declined 7.7% in the recent quarter of FY 2026, despite being up 32% with inorganic growth. The decline was largely due to temporary issues such as decreased volumes in products related to new residential construction (like GRD sales) and distributors de-stocking HVAC/R inventory. Management targets mid to high single-digit growth, which is augmented by acquisitions.
The segment serves maintenance dominated end markets such as HVAC, plumbing and primarily sells consumables and other products that are typically used in repair and replacement markets. Many of these products are small-ticket, high-frequency, high trust products. Others are niche HVAC replacement parts that are crucial for keeping HVAC/R systems running.
CSW maintains strong, long-term relationships with wholesale distribution partners, retailers and exclusive dealers. Although the company doesn’t reveal what their best selling products are, I would guess with some degree of certainty that RectorSeal’s pipe thread sealants (and other consumable plumbing/HVAC products) are the biggest sellers. I personally use some these products regularly and can attest to their broad availability and reliability. RetorSeal is household name in the plumbing and HVAC/R industries and the distribution is hardly matched by competitors. This is a great brand to own, and over the years, CSW has made a handful of tuck-in acquisitions to build the core RectorSeal business (HVAC/R, parts & accessories, contractor consumables). Recent acquisitions such as MARS Parts and Aspen Manufacturing have expanded CSW’s presence in the HCAV/R repair market, which is seeing some tailwinds relative to replacement.
It goes without saying the end-market here is highly fragmented and there are many opportunities to buy small niche contractor brands and fold those into CSW’s distribution channels. The only drawback is they must compete with private equity to acquire businesses.
Specialized reliability solutions: Makes up just 15% of revenue, 17% EBITDA margin. Largely consists of industrial grade chemicals and lubricants that are essential in the mining, rail, energy, steel and energy industries. Most of these products are maintenance-driven consumables, used regularly in ongoing plant MRO operations. This is a very reliable business, with repeat customers, but I don’t see this driving the business going forward at this point. They made a few very small acquisitions here recently but the segment hasn’t grown in any meaningful way in years.
Engineered products: 13% of revenue and 14.8% EBITDA margin, revenue is up just 16% since 2023. Provides building code-driven, engineered life-safety products such as railings, expansion joints, fire/smoke protection and fire stopping products. This segment likely will not be a large contributor to future growth and they don’t seem to be investing in this segment at this point in time.
Management
CSW did a strategic equity raise and deleveraging recently. As the bull market marched higher late 2024 (fiscal 2025), the company issued shares and subsequently used the cash to extinguish the debt under the revolving credit facility, which reduced interest expense by $12.5 million, and was immediately accretive to shareholders. The benefit to shareholders was also aided by investing the remaining proceeds into a market fund that paid interest income. Additionally, CSW was also able to terminate an interest rate swap agreement that was tied to that debt. The remaining cash was then used to partially fund the PF Waterworks (November 4, 2024) and Aspen Manufacturing acquisitions (May 2025). The company also recently upsized the share repurchase program to $200 million, which is just in time as the stock has fallen 40%+ from the highs.
I don’t normally like equity financing, but the dilution was well times and offset by the increased profitability generated by the funds. This was an intelligent use of capital, which signals to me that Joe and the team are capable operators who are aware of their duty to do be stewards of shareholder capital.
Managements capital allocation plan is simple; invest in organic growth, then accretive acquisitions, and return excess capital to shareholders, while maintaining 1x - 3x debt/ebitda. They have done this very well now for 10 years and I assume they will continue going forward.
Joseph Armes began his career as an m&a lawyer and then moved on to serve as the Chairman, CEO, and President of Capital Southwest Corporation, then eventually CEO of CSW. Armes owns 70k shares of CSW worth ~$18.5 million, which is 20x his base salary of $850k. His inside ownership, along with his talent are somewhat satisfactory. I would obviously prefer that he own a much larger stake in the company, but he is also incentivized with equity compensation and other incentives tied to EBITDA, op. cash flow and total shareholder return. In total, 83.5% of his compensation is at risk.
Total insider ownership among all insiders is about 4%.
Recent acquisitions
CSW plowed almost $1 billion into the Contractor Solutions segment in 2025 (FY 2026) through two acquisitions: MARS Parts and Aspen Manufacturing. Both acquisitions are aimed at increasing CSW’s presence in the HVAC/R repair market, which has seen an uptick recently because the replacement cost of HVAC units has increased, such that demand has softened, driving more users to repair parts rather than replace entire units.
Aspen Manufacturing
Aspen Manufacturing produces evaporator coils and air handler offerings. They are responsible for cooling the air and moving it throughout a home or structure. These are typically replaced every 10-20 years but are higher-cost items.
Key Info/Financing
Closed May 1, 2025
Approximately $330.4 million
Acquired at 11x EBITDA
$125 million in revenue FYT 2025, growing at mid-teens.
Funded with cash on hand and borrowings of $135.0 million under the existing Revolving Credit Facility.
24% EBITDA margin expected for full year 2026.
Strategic rationale
Increase repair exposure vs replacement
Expanded CSW’s product portfolio into a profitable market with tailwinds (HVAC/R).
Financial impact
Dilutive to EBITDA and Gross margin
No synergies
MARS Parts
One of the largest providers and distributors of HVAC/R parts and supplies in North America. They source from multiple OEMs, then package, brand, and distribute parts to the aftermarket. MARS has a broad selection of HVAC parts, and they are also a huge distributor in the motors and capacitors market. Motors and capacitors allow a system to move air and compress refrigerant. These are lower-cost, frequently replaced parts, usually every 7-10 years, maybe 15 years for a good motor.
Key Info/Financing
Closed November 4, 2025
$650 million deal price
Acquired at 10.4x EBITDA, excluding ~$20 million earn-out and adjusted for synergies.
$204 million in revenue, expected to have mid/high single digit organic growth once integrated into CSW’s system .
Funded with a $600 million Syndicated Term Loan A and $50 million under the Revolving Credit Facility.
25% EBITDA margin but 30% expected by next year.
Strategic rationale
Product mix is more heavily focused on repair versus replacement solutions, but the business is a blend that also goes into the replacement market.
Provides diversified exposure to HVAC/R parts market and frequently most replaced parts.
Financial impact
Immediately accretive to EPS and EBITDA
Immediately-actionable cost synergies of at least $10 million in annual run rate
Personal thoughts on recent M&A activity
Aspen and MARS parts are great companies that operate in an industry with long-term tailwinds, and they will likely contribute much to cash flow in the coming years. However, CSW paid a slight premium above what they normally pay (8x - 9x EBITDA) for these two, and they are much larger than the typical CSW acquisition, which creates some integration risk. Regardless, CSW continues to build out its RectorSeal brand, and I expect it will eventually be a hugely valuable asset.
Risks
There are a few risks one should consider.
They compete with private equity to acquire niche HVAC and plumbing brands. Anyone who has been paying attention knows private equity is like a bunch of starving sharks, and HVAC and plumbing companies are like chum. Competition can push up prices and squeeze returns and inorganic growth.
These businesses are cyclical. While HVAC and plumbing tend to hold up better in down seasons than other trades and industrials brands, nevertheless, there will always be slower seasons in HVAC and plumbing.
Valuation
The stock is down 35% - 40% + after a huge multi-year run, and it’s now reasonably priced at 24x TTW adjusted EPS, or 20.5x run rate adjusted EPS. The industry is temporarily under pressure, and this has opened up an opportunity to buy into a quality industrial growth business. CSW is on track to produce $230 million in free cash flow in FY 2026, implying it’s somewhere ~18x EV/FCF.
On a trialing twelve months basis, the company trades at 19x Adj. EBITDA with an enterprise value of $5 billion. I estimate a post-synergy pro-forma TTM Adjusted EBITDA of ~$305 million, ($243.5 mm CSW + $52.3 mm Mars + $10 mm synergy = $305.8). This implies 15x - 16x EBITDA.
Admittedly, this is not super cheap, but then again, this company has become increasingly higher quality since the IPO. This is a quality industrial consolidator with high free cash flow conversion (80% +) and a talented management team that will likely continue to make intelligent decisions and acquisitions going forward.
Below is a comparison of various industrial companies. Because CSW is more diversified, I compared some HVAC parts, and a few engineered parts and contractor brands peers.
CSW is still in its growth phase.
CSW is not outrageously valued on an EV/EBITDA basis, assuming MARS acquisition, a ~$265 share price and the realization of minimum expected synergies.
Because CSW is still in a growth phase, capital hasn’t been deployed towards buybacks in any meaningful way yet. As the company matures, this could become another key avenue for returning capital to shareholders, along with dividends.
One of management fundamental objectives is to drive earnings growth at a rate in excess of sales growth. They already accomplished this and still have a runway ahead to flex operating leverage.
As far as the valuation goes, I am going to assume the following
2026 revenue of ~$980 mm - ~$1000 mm
Revenue growth of 7% - 12%. Bear and base account for slower 2027 FY
Adjusted EBITDA margin of 25% - 26.5%, reflecting compression in bear case and slight expansion in bull case. Current margin sits at 26%
Multiple of 15x - 20x.
Net debt ~$591 mm (2 x $295.8 proforma EBITDA)
Final thoughts
I did buy some shares at $250, but it was just a tracking position. I like the company and trust the management, but the potential upside is not super compelling, assuming my assumptions are correct.
The stock has rallied from a low of $230 to $266, but the underlying fundamentals haven’t changed, and there is no positive news indicating organic growth will return soon. All things equal, I would be a lot more excited at or below $230 per share.
That’s it for this week. Thanks for reading.
Great write up, as usual👍👍
I bumped into you while searching for Acuren. I really appreciate your research on the buildings and infrastructure market. I enjoyed reading this post too!
I noticed in your other post that you mentioned you’ll cover their Q3 earnings soon. I look forward to hearing your take. Now that the gains from the shoutout by that well-known Substack user have faded, it feels like a good time to take a deeper look at Acuren.
Happy Thanksgiving!