Nearly $2.9 Billion: Blackstone’s “Hand-Raised” IPO Is Coming

Recently, multiple media outlets reported that Legence, an engineering and maintenance services provider under PE giant Blackstone, has updated its IPO filing with the SEC.  

 

 

The filing reveals that Legence plans to issue 26 million common shares in this IPO, with a price range of $25-29 per share. At the upper end, this could raise $754 million, with a post-issuance total share count of approximately 101.6 million, corresponding to a market cap cap of $2.95 billion.  

 

Regarding the use of proceeds, Legence stated it will allocate about $400 million to repay existing term loans, with the remainder directed toward acquisitions and operating capital.

Twice Sold to PE, Now Held by Blackstone

According to official records, Legence was founded in 1963 as Therma Holdings, headquartered in San Jose, California.  

 

In 2007, Connecticut-based private equity firm Gemspring Capital acquired a controlling stake in Therma.  

 

Over the next decade, Legence completed 17 acquisitions, expanding from a single HVAC focus to building automation, energy retrofits, and power operations, with revenue growing to about $500 million.  

 

During this period, Legence introduced lean construction and standardized ERP systems, laying the groundwork for larger future acquisitions.  

 

Later, Blackstone took notice. In October 2020, Blackstone acquired Therma Holdings from Gemspring through its Core Private Equity Fund VI, renaming it Legence. At the time, Legence’s enterprise value was approximately $1.3 billion.  

 

This deal reflected a 1.5x EV/revenue multiple and 8.7x EV/EBITDA, trading at a roughly 10% discount to the public market at the time.

 

Blackstone’s “Hand-Raised” IPO: 4 Years, 28 Acquisitions, Revenue Nearly Doubles

 

After taking the helm, Blackstone quickly outlined a three-step expansion strategy for Legence—termed “Buy-and-Build”:  

1. Horizontal Expansion: With Blackstone’s backing, Legence acquired 28 regional engineering firms between 2021 and 2024, expanding its footprint from 12 to 38 states and adding over 500 licensed technicians and 1,200 engineers.  
2. Vertical Integration: Along related upstream and downstream chains, Legence acquired firms like A.O. Reed (mechanical/electrical), OCI Associates (design consulting), and P2S (labs/cleanrooms), instantly completing its design-build-operate full value chain.  
3. Digitalization: Under Blackstone’s guidance, Legence deployed its “Edge AI” solution. This not only enables predictive maintenance for building energy use but also delivers 15%-20% average energy savings per client, boosting Legence’s customer renewal rate to 85%.  

 

During Blackstone’s management, Legence’s revenue surged from $1.47 billion in 2020 to $2.56 billion in 2024, with a compound annual growth rate (CAGR) of 15%; EBITDA grew from $160 million to $290 million; and free cash flow rose from $90 million to $180 million.  

 

The painstaking, costly investment has yielded impressive returns. Additional data shows that over the past 12 months ending June 30 this year, Legence’s revenue reached $2.2 billion. Moreover, its backlog of uncompleted orders and awarded contracts totals a substantial $2.8 billion.

$100 Billion Market Opportunity

Legence’s IPO comes at a perfect intersection of US building energy efficiency policies and AI infrastructure investment trends.  

 

In four years, Blackstone transformed a regional HVAC contractor into a national energy services platform, doubling its valuation for a capital market debut, further proving the replicability of the “Buy-and-Build” model in fragmented engineering markets.  

 

For secondary market investors, LGN is not just an “ESG concept stock” but a rare opportunity to tap into the $100 billion North American building decarbonization and data center expansion boom.  

 

Whether the company can sustain a CAGR above 15% over the next three years will depend on its acquisition integration capabilities and the pace of data center order execution.