IT management software company SolarWinds filed to become a public company again via an initial public offering (IPO). Two private equity firms — Thoma Bravo and Silver Lake Partners — took it private three years ago.

SolarWinds is seeking to relist on the New York Stock Exchange with a maximum offer price of $500 million, according to the SEC filing. It hopes to relist under its previous ticker symbol “SWI.”

Thoma Bravo and Silver Lake announced the acquisition, valued at $4.5 billion, in October 2015. When the deal closed, in February 2016, SolarWinds ceased trading on the stock exchange. At the time the company said the deal would enhance its flexibility and add support for it to pursue more organic growth and focus on its acquisition plan.

As an interesting side note: another company co-owned by Silver Lake — Dell Technologies — is in the news today for its IPO plans. Michael Dell took his company private in 2013, partnering with Silver Lake to buy out shareholders for a reported $25 billion. He is now pursuing various deals to take the company public again.

Since it became a private company in 2016, SolarWinds has made multiple acquisitions led by CEO Kevin Thompson. It acquired cloud-based log monitoring and log analytics software provider Loggly in January of this year. Loggly’s software-as-a-service (SaaS) log monitoring and analytics product was integrated into SolarWinds’ existing SaaS-based cloud monitoring systems. In July, it acquired threat monitoring service Trusted Metrics. SolarWinds intends to roll Trusted Metrics into a new security product called SolarWinds Threat Monitor once the purchase is complete. And in June 2016, it bought IT service management company Logicnow.

In the first six months of 2018, ending June 30, the company logged $398.6 million in revenue, an increase from $340.6 million in the same period of the previous year.

Aside from taking the company public SolarWinds said this week it will make several updates to its unified infrastructure management portfolio. This portfolio is built on its modular unified monitoring architecture, Orion. The updates include added support for DevOps teams that operate on Microsoft on-premises environments, Microsoft Azure, and Office 365.

SolarWinds’ products that serve DevOps teams include its SaaS-based AppOptics, Pingdom, Papertrail, and Loggly. The updates will simplify full-stack monitoring, particularly to cloud infrastructure and applications.

It is also debuting a free cost calculator tool for Microsoft Azure this week at Microsoft Ignite. The calculator simplifies reporting Azure expenditures in one or more subscriptions.

Earlier this year, the company updated two of its core products to improve its performance monitoring capabilities in physical, virtual, and hybrid environments. This included updates to its storage resource monitor (SRM) and to its server and application monitor (SAM).