Innovative Houston plastics company scores $100M 'Green Loan' and prepares to scale

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Houston-based Circulus, which just received a $100 million credit facility, focuses on innovative plastics recycling. Photo via circulus.com

Fueled by a new $100 million credit facility, a Houston-based company that specializes in plastics recycling is establishing a nationwide network of recycling plants.

Circulus Holdings secured the $100 million credit facility from Riverstone Credit Partners, which has an office in Houston. This "green" loan is aimed at supporting environmental sustainability.

David Hudson, founder and CEO of Circulus, says in a news release that the credit facility "enables Circulus to rapidly develop a broad network of facilities and further the company's commitment to sustainable manufacturing. We look forward to supporting green-based jobs and preserving our environment for future generations."

Circulus, a portfolio company of Houston-based private equity firm Ara Partners, recently opened its first plastics recycling facility. The 110,000-square-foot plant is in Riverbank, California, near Modesto. It employs 45 people. So far, other Circulus plants, each of which will be larger than the California facility, are planned for Alabama, Oklahoma, the Midwest, and the Northeast.

Circulus is building plants that will transform lower-grade plastic into post-consumer resin so that it's suitable for commercial and industrial uses.

Circulus says it is diverting plastic from landfills, incinerators, and oceans and "upcycling" it into products, including plastic bags and plastic wrap. Customers for those products include retailers, resin producers, packaging manufacturers, and makers of consumer packaged goods. The company says greenhouse gas emissions associated with production of its post-consumer resin are about 88 percent below that of virgin resin.

"Through our significant investment in infrastructure and commitment to manufacturing excellence, we are supporting green job creation and reinforcing the nation's global position in sustainable manufacturing," Hudson says in a news release.

Before Circulus, Hudson was an operating partner at Ara Partners.

Founded in 2019, Circulus employs a dozen people in Houston and plans to add workers here as its network of facilities expands. Circulus is set up as a public benefit LLC, a for-profit business that promotes a social benefit for the public.

Ara Partners invests in decarbonization-focused businesses in the manufacturing, chemicals and materials, energy, and food and agriculture sectors. Aside from Circulus, portfolio companies include Houston-based Path Environmental Technology, which provides a decarbonization-oriented industrial services platform for above-ground storage tanks, and Arlington-based Priority Power Management, an energy services provider whose priorities include carbon neutrality and smart energy.

Circulus is breaking into a plastics recycling market whose global size in 2020 was estimated at $39.9 billion, according to Imarc Group, a market research company. The firm projects the market will grow to $56.5 billion by 2026.

"The demand for plastic material has been constantly increasing across several industries like food and beverage, automotive, packaging, and healthcare. The development of these industries can be accredited to rising population, inflating disposable incomes, and continuous product innovations," Imarc Group says. "In this context, higher manufacturing cost of virgin resins has necessitated the use of recycled plastic products, thereby bolstering the growth of the global recycled plastics market."

Verified Market Research estimates the global market for post-consumer recycled plastics at nearly $15.2 billion in 2020 and forecasts it will rise to almost $22.4 billion by 2028.

"The products produced from these plastics close the loop by diverting them from landfills and enabling them to be recycled," Verified Market Research says. "The advantages of employing post-consumer plastics also assist in addressing … microplastics in the environment. Microplastics are originated from plastic waste that has been deposited into the environment."

Solugen, which uses plant-centered biotechnology to produce environmentally friendly chemicals, has raised an additional $30 million and is speculated to soon reach unicorn status. Photo via solugentech.com

Houston startup raises $30M, plans to be 'next iconic chemical company' with plant-based alternatives

climate tech

While Forbes recently anointed Houston-based Solugen Inc. as one of the next billion-dollar "unicorns" in the startup world, Dr. Gaurab Chakrabarti shrugs off the unicorn buzz.

Chakrabarti, a physician and scientist who's co-founder and CEO of the startup, concedes he doesn't know whether Solugen will be worth $1 billion or not. But he does know that the startup aspires to be a key competitor in the emerging "climate tech" sector, whose players strive to combat climate change. Chakrabarti estimates the climate-tech chemical space alone represents a global market opportunity valued at $1 trillion to $2 trillion per year.

Solugen's overarching goal in the climate-tech market: Replace petroleum-based chemicals with plant-based substitutes.

"I'd love it if we were the poster child that drives climate tech to be the next big, sexy trend," Chakrabarti says.

Chakrabarti acknowledges Solugen's investors, executives, and employees hope the startup succeeds financially. But success, he believes, goes beyond making money and plotting an exit strategy. Instead, Chakrabarti emphasizes "a shift in thinking" on climate tech that he says promises to transform the fledgling sector into a "true niche" that'll be "good for everyone."

"Who cares if people are all hyped up for the wrong reasons?" says Chakrabarti, referring to the unicorn speculation.

Solugen sits at the crossroads of biology and chemistry. In short, the startup taps into plant-centered biotechnology to produce environmentally friendly chemicals and "decarbonize" the chemical industry.

"Quite simply, we want to become the next DowDuPont or the next iconic chemical company, but using principles of green chemistry instead of principles from petroleum chemistry," Chakrabarti says.

If Solugen does reach the icon stratosphere, Chakrabarti envisions it doing so on a speedy schedule. In the traditional petrochemical market, it can take 10 to 20 years to put a new product on the market, he says. "I don't have that kind of time. I'm a very impatient person," Chakrabarti says.

Gaurab Chakrabarti Gaurab Chakrabarti, CEO and co-founder of Solugen, isn't paying any mind to his company's predicted unicorn status — rather he's focusing on the difference he can make on reducing carbon emissions. Photo via solugentech.com

Spurred by that restlessness, Chakrabarti seeks to propel Solugen's products from concept to commercialization in the span of two years. He says the startup already has proven the ability to do that with its sugar-derived hydrogen peroxide product.

"We're going to continue to do that, and it would be great if we can continue demonstrating new [products] coming to market once a year," says Chakrabarti, who grew up in Sugar Land.

Solugen seems to have plenty of financial fuel to make that happen. In April, Solugen raised $30 million in venture capital as an add-on to its Series B funding, which initially closed May 2019. That brings its total VC haul to $68 million since it was founded in 2016, according to Forbes. The recent funding lifted the company's valuation to $250 million, putting it $750 million away from unicorn territory.

Chakrabarti doesn't dismiss the notion of an eventual IPO for Solugen but says being acquired isn't "terribly interesting to me."

"If you want to make money, you can always go be a banker," he notes.

Chakrabarti estimates Solugen will generate $30 million to $40 million in revenue this year, up from $12 million in 2019. Profit remains elusive, though, as the company pours its gains into R&D. The company graduated in 2017 from the Y Combinator startup accelerator. Aside from Y Combinator and Unicorn Venture Partners, investors include Founders Fund, Refactor Capital, Fifty Years, and KdT Ventures.

Solugen's current lineup features fewer than a half-dozen products, which are sold to industrial and government customers. Hundreds more products are in the pipeline for use in sectors like agriculture and energy, Chakrabarti says.

"It's one of the blessings and curses of this company — there's always something to work on, always something big to scale up," says Chakrabarti, who earned his M.D. and Ph.D. from the University of Texas Southwestern Medical Center in Dallas.

Working on selling Solugen's current products and developing its new products are 70 employees, located at its headquarters in Houston and its new production facility in Lubbock. By the end of this year, the startup should employ close to 100 people, Chakrabarti says.

Chakrabarti hesitates to identify Solugen's competitors, as he believes a perceived rival very well could end up becoming a partner.

"I think everyone eventually should be a partner of Solugen, not competition," he says. "It's an ideology that's actually the competition, an ideology like, 'We've always used petrochemistry. This is just how it's been done.'"

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9 can't-miss Houston business and innovation events for March

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Editor's note: March is here, and that means the return of some of Houston’s signature innovation events, as well as insightful talks and a Mardi Gras block party. Here are the Houston business and innovation events you can't miss in March and how to register. Please note: this article might be updated to add more events.

March 5 – SheSpace Women’s Day Open House

Connect with like-minded women during a free day of coworking at SheSpace. And while you're there, take a break and enjoy a floral arranging class, complimentary breakfast, pop-up shops, happy hour and raffle prizes. Space is limited.

The event is Wednesday, March 5, from 9 a.m.–7 p.m. Click here to register.

March 5 — Science and the American Presidency

Hear from former presidential science advisors—Kelvin Droegemeier who served under President Trump, Neal Lane who served under President Clinton and Alondra Nelson who served under President Biden—as they discuss their experiences leading the White House Office of Science and Technology Policy and how science is used to address issues from climate change and public health to national security and economic competitiveness. An exhibit inside Baker Hall will complement the event. The Baker Institute Science and Technology Policy Program and Rice Innovation will host the talk.

This event is Wednesday, March 5, from 5:30–8 p.m. at James A. Baker Hall. Click here to register.

March 6 — Ion Block Party - Mardi Gras Edition 

Let the good times roll this week while networking with potential collaborators, mentors and investors at the Ion. Food and drink will be available while supplies last and the Ion will provide drink tickets for one free drink at Second Draught upon check-in.

This event is Thursday, March 6, from 4–7 p.m. at the Ion. Click here to register.

March 10-14 — CERAWeek 2025

The foremost annual gathering in the energy sector returns to Houston March 10-14, 2025. Themed "Moving Ahead: Energy strategies for a complex world," CERAWeek 2025 will focus on the challenges ahead for energy security, supply, and climate ambitions. More than 10,000 participants from over 2,050 companies across 80 countries will convene in Houston for this ambitious event. CERAWeek comprises three platforms: the Executive Conference, the Innovation Agora, and Partner Programs. We'll dive into comprehensive CERAWeek recommendations in future articles.

This event begins Monday, March 10. Click here to register.

March 11 — Energy Venture Day at the Ion

Preview pitches from 40-plus energy ventures competing at CERAWeek's Energy Venture Day and Pitch Competition, co-hosted by the Rice Alliance, Ion, HETI, and TEX-E. This free, fast-paced pitch event offers an alternative to the CERAWeek event, which requires an Agora pass.

This event is Tuesday, March 11, from 9 a.m.–2:30 p.m. Click here to register.

March 13 — Code4Y'allMeetup

Connect with fellow coders at Code4Y’all's meetup at the Ion. Andrew Baines, Founder of No Experience Jobs, will present "How I Built a Job Board to Help Entry-Level Tech Talent (And What I Learned)." Hear from Baines and learn lessons from job seekers.

This event is Thursday, March 13, from 6–7 p.m. Click here to register.

March 17 — Women in Innovation 

Celebrate Women's History Month with an engaging panel discussion hosted by the University of Houston's Division of Energy and Innovation. UH's Tanu Chatterji, Stacey Gorniak and Chrysa Latrick will discuss the achievements of trailblazing women across various industries, as well as share challenges and experiences. Lunch will be provided.

This event is Monday, March 17, from noon–1 p.m. at UH's Faculty Cafe. Find more information here.

March 24-28 — H-Town Roundup 2025

Celebrate innovation, entrepreneurship and collaboration this month during Houston Exponential's H-Town Roundup. During the fifth-annual free event series, previously known as Houston Tech Rodeo, attendees can expect insightful talks, workshops and networking events at venues across the city like the Ion, Greentown Labs, University of Houston and more.

This event begins Monday, March 24. See the full schedule of events here.

​March 27 — NASA Tech Talks

Every fourth Thursday of the month, NASA experts, including longtime engineer Montgomery Goforth, present on technology development challenges NASA’s Johnson Space Center and the larger aerospace community are facing and how they can be leveraged by Houston’s innovation community. Stick around after for drinks and networking at Second Draught.

This event is Thursday, March 27, from 6-7 p.m. at the Ion. Register here.

Texas startup's lunar lander aces moon touchdown with special delivery for NASA

Touchdown

A private lunar lander carrying a drill, vacuum and other experiments for NASA touched down on the moon Sunday, the latest in a string of companies looking to kickstart business on Earth's celestial neighbor ahead of astronaut missions.

Firefly Aerospace’s Blue Ghost lander descended from lunar orbit on autopilot, aiming for the slopes of an ancient volcanic dome in an impact basin on the moon’s northeastern edge of the near side.

Confirmation of successful touchdown came from the company's Mission Control outside Austin, Texas, following the action some 225,000 miles away.

“You all stuck the landing. We’re on the moon,” Firefly’s Will Coogan, chief engineer for the lander, reported.

An upright and stable landing makes Firefly — a startup founded a decade ago — the first private outfit to put a spacecraft on the moon without crashing or falling over. Even countries have faltered, with only five claiming success: Russia, the U.S., China, India and Japan.

A half hour after landing, Blue Ghost started to send back pictures from the surface, the first one a selfie somewhat obscured by the sun's glare. The second shot included the home planet, a blue dot glimmering in the blackness of space.

Two other companies’ landers are hot on Blue Ghost’s heels, with the next one expected to join it on the moon later this week.

Blue Ghost — named after a rare U.S. species of fireflies — had its size and shape going for it. The squat four-legged lander stands 6-foot-6-inch tall and 11 feet wide, providing extra stability, according to the company.

Launched in mid-January from Florida, the lander carried 10 experiments to the moon for NASA. The space agency paid $101 million for the delivery, plus $44 million for the science and tech on board. It’s the third mission under NASA’s commercial lunar delivery program, intended to ignite a lunar economy of competing private businesses while scouting around before astronauts show up later this decade.

Firefly’s Ray Allensworth said the lander skipped over hazards including boulders to land safely. Allensworth said the team continued to analyze the data to figure out the lander's exact position, but all indications suggest it landed within the 328-foot target zone in Mare Crisium.

The demos should get two weeks of run time, before lunar daytime ends and the lander shuts down.

It carried a vacuum to suck up moon dirt for analysis and a drill to measure temperature as deep as 10 feet below the surface. Also on board: a device for eliminating abrasive lunar dust — a scourge for NASA’s long-ago Apollo moonwalkers, who got it caked all over their spacesuits and equipment.

On its way to the moon, Blue Ghost beamed back exquisite pictures of the home planet. The lander continued to stun once in orbit around the moon, with detailed shots of the moon's gray pockmarked surface. At the same time, an on-board receiver tracked and acquired signals from the U.S. GPS and European Galileo constellations, an encouraging step forward in navigation for future explorers.

The landing set the stage for a fresh crush of visitors angling for a piece of lunar business.

Another lander — a tall and skinny 15-footer built and operated by Houston-based Intuitive Machines — is due to land on the moon Thursday. It’s aiming for the bottom of the moon, just 100 miles from the south pole. That’s closer to the pole than the company got last year with its first lander, which broke a leg and tipped over.

Despite the tumble, Intuitive Machines' lander put the U.S. back on the moon for the first time since NASA astronauts closed out the Apollo program in 1972.

A third lander from the Japanese company ispace is still three months from landing. It shared a rocket ride with Blue Ghost from Cape Canaveral on Jan. 15, taking a longer, windier route. Like Intuitive Machines, ispace is also attempting to land on the moon for the second time. Its first lander crashed in 2023.

The moon is littered with wreckage not only from ispace, but dozens of other failed attempts over the decades.

NASA wants to keep up a pace of two private lunar landers a year, realizing some missions will fail, said the space agency's top science officer Nicky Fox.

“It really does open up a whole new way for us to get more science to space and to the moon," Fox said.

Unlike NASA’s successful Apollo moon landings that had billions of dollars behind them and ace astronauts at the helm, private companies operate on a limited budget with robotic craft that must land on their own, said Firefly CEO Jason Kim.

Kim said everything went like clockwork.

“We got some moon dust on our boots," Kim said.

Houston startup Nap Bar pivots with VR and big plans for growth

power nap

Houston’s Khaliah Guillory takes a 30-minute nap every day. She says this is how she’s so productive.

The habit also led to the founding of her white-glove, eco-friendly rest sanctuary business, Nap Bar.

Guillory launched the luxury sleep suites company back in 2019 to offer a unique rest experience with artificial intelligence integration for working professionals, entrepreneurs and travelers who needed a place to rest, recharge and rejuvenate. The company was named a Houston Innovation Awards finalist last year.

She says naps are backed by science. And by her professional network, too.

“Once I polled and surveyed my friends, most of them said that they also took naps during their lunch break, whether it be in their office or in their car,” says Guillory, former vice president of marketing strategy at Wells Fargo. “Once they overwhelmingly agreed that they would absolutely use a dedicated place for them to take naps if I created it, I got to work, and Nap Bar was born.”

Simply put, Guillory has effectively made it acceptable and, yes, even cool for working adults to take naps.

“I played D1 basketball at the University of Central Florida and that’s really where I learned the art of a power nap and the benefits of it,” Guillory says. “And I just continued to nap throughout my corporate career. So, in November of 2018, I retired from corporate America … I just knew I had a higher calling to do something else.”

Guillory first opened up shop in Rice Village as a beta test for her novel nap idea and it took off. She soon forged strategic partnerships with organizations like UT Health, where Nap Bar provided much-needed naps to postpartum mothers.

“Nap Bar showed what the benefits of a good nap was, specifically to postpartum moms in terms of mental stressors, productivity, and things of that nature,” Guillory says.

In November 2019, Guillory moved Nap Bar to The Galleria and says the business produced revenue from day one. However, in March 2020, she was forced to shut us down due to the COVID-19 pandemic.

“I promised myself that I was not going back to corporate America, so I pivoted. I moved forward by creating a better sleep box, with a vegan pillow mist and soy-based candle. I also became a certified sleep coach. And I just kept pivoting from there, reinventing Nap Bar as a company,” she says.

One pivot included adding a virtual reality sleep experience, MetaSnooze.

“MetaSnooze is a really cool technology that offers sleep therapy and relaxation that I curated myself,” Guillory says. “Basically, the user puts on the VR headset, and it escapes them. They're transported to places all over the country. For example, they're sitting in serene environments all the while listening to these rhythmic beats that are designed to help them release and relax. Visualizations have been scientifically proven to improve one’s mental health and mental stressors.”

Guillory initially rolled out MetaSnooze in 2020 at events like South by Southwest and kept improving the experience and building her business. By February 2024, she was curating a wellness experience at The Grammy Awards.

“That was huge for us,” Guillory says. “Being able to get feedback from the celebrities, with a handful of them even inquiring where they could purchase the headset. They were excited about the future of Nap Bar, so that was really, really cool.”

The widespread interest in Nap Bar has Guillory thinking big. She aims to expand to 30 locations in three years.

“When I say that, it sounds ambitious,” says Guillory. “It is, but I come from the school of thought that if you shoot for 30 and you get 25, no one's going to shake their finger at you for doing that, right? It's really aiming towards this big, hairy, audacious goal. I learned that in corporate America. So, what we're looking to do now is raise money like crazy.”

Guillory says she’s now looking to scale the business by partnering with like-minded investors with experience in the wellness space.

She envisions locations at national and international airports, which she says offer ripe scenarios for patrons needing to recharge. Additionally, Guillory wants to build on her initial partnership with UT Health by going onsite to curate rest experiences for patients, caregivers, faculty, staff, nurses and doctors. Colleges also offer an opportunity for growth.

“We’ve done some really cool pop-ups with the University of Houston, where we brought the rest experience on campus,” Guillory says. “That means we bring a portable, full-size, organic mattress with disposable sheets, as well as our virtual reality experience.”

Nap Bar will also serve companies, office buildings, and even sports venues, according to Guillory.

“We can literally go any and everywhere,” she says. “Our collected data suggests that we’ve just got to go where sleepy people are so that they can get restorative sleep.”

From a pricing standpoint, Nap Bar’s model is a dollar a minute. Depending on where the client is, the pop-up experience is based on a day rate or a half-day rate, starting at $4,000.

Add-ons include a full-size organic mattress or hosting a masseuse or massage therapist onsite.

With the Grammys already under her belt, Guillory would like to see Nap Bar utilized at the 2028 Olympics and build partnerships with other virtual reality companies to bring its licensed MetaSnooze software to the masses.

She also sees opportunities in athletic treatment, sleep apnea, and insomnia.

“We have done several studies with proven results that MetaSnooze has reduced mental stressors and anxiety,” Guillory says. “I'm excited about what the future holds for MetaSnooze. It definitely is a game-changer … We will continue to innovate sleep or provide sleep resources and tools in a very innovative way.”

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