During the third quarter of 2024, Houston-area companies saw a 15 percent decrease of VC investment compared to the third quarter of 2023. Photo via Getty Images

New data from the PitchBook/NVCA Venture Monitor reveals a seesaw pattern in the Houston area’s venture capital funding.

VC fundraising by Houston-area companies climbed during the first part of this year compared with the same period last year, according to the latest PitchBook/NVCA Venture Monitor. But from 2023 to 2024, the region’s third-quarter VC haul fell by a double-digit percentage.

In the first three quarters of 2024, Houston-area companies collected $1.24 billion in venture capital, the PitchBook/NVCA Venture Monitor shows. That’s up eight percent from the $1.15 billion raised in the first three quarters of 2023.

A look at third-quarter data tells a different story. During the third quarter of 2024, Houston-area companies reaped $529.45 million in VC funding. That’s down 15 percent from $623 million in the third quarter of 2023.

The U.S. saw VC funding rise from $123.5 billion in the first nine months of 2023 to $131.8 billion during the same period in 2024, PitchBook/NVCA data shows. That works out to a 6.7 percent increase. However, Texas experienced a five percent drop — from $5.4 billion in the first nine months of 2023 to $5.13 billion during the same period in 2024.

“While we see some promising signals with lower rates and platform shifts related to AI, we expect the overall VC landscape to [remain] uncertain and strained for the time being,” says Nizar Tarhuni, executive vice president of research and market intelligence at PitchBook.

The new PitchBook/NVCA report forecasts that VC deal value in the U.S. will hit $175.2 billion this year. This figure is shy of annual fundraising totals during the peak of ultra-low interest rates but exceeds the sum for the pandemic year of 2020.

“Venture deal counts seem to have bottomed, but a meaningful market rebound has yet to occur,” says the report.

In the first six months of this year, Houston-area startups attracted $760.55 million in VC funding, which is up 17.7 percent from the same time last year. Photo via Getty Images

Report: Amid difficult market, Houston sees uptick in VC funding

seeing green

Houston-area startups saw a healthy increase in venture capital funding during the first half of 2024 compared with the same period last year, new data shows.

In the first six months of this year, Houston-area startups attracted $760.55 million in VC funding, according to the latest PitchBook-NVCA Venture Monitor. That’s up 17.7 percent from the $645.99 million collected in the first six months of 2023.

Keep in mind that these figures might not match previously reported numbers. That’s because PitchBook regularly adjusts data as new information becomes available.

In light of various factors, such as the ongoing hype over artificial intelligence, fundraising will likely continue to be challenging for U.S. startups as a whole, according to Nizar Tarhuni, vice president of institutional research and editorial at PitchBook, a provider of VC data.

Nonetheless, Bobby Franklin, president and CEO of the National Venture Capital Association (NVCA), points out that American venture capital “is finding its footing in 2024.”

Across the country, VC funding for startups in the first half of 2024 totaled $93.4 billion, up 6.5 percent from the $87.7 billion raised during the same period last year, according to the PitchBook-NVCA Venture Monitor.

“With steadily increasing deal values, especially across early-stage investments, more first-time financings, and increased crossover investor participation, [the second quarter of 2024] was a good one for VC,” says Franklin. “Now it’s up to founders, investors, and regulators to support, rather than stifle, these green shoots as the market heads toward a recovery.”

In the second quarter alone, VC funding in the U.S. jumped from $35.4 billion in 2023 to $55.6 billion in 2024. That’s an increase of 57 percent.

By contrast, the Houston area’s VC funding went in the opposite direction. Startups in the region scored $231.79 million in VC during the second quarter of 2024 vs. $333.17 million during the same period a year earlier. That’s a drop of 30 percent.

So far in 2024, Houston-based Fervo Energy dominates VC hauls for startups in the metro area. In March, the provider of geothermal power announced it had secured $244 million in funding, with Oklahoma City-based oil and gas company Devon Energy leading the round.

Fervo’s latest pot of VC represents more than 30 percent of all Houston-area VC funding during the first six months of 2024.

Tim Latimer, co-founder and CEO of Fervo, says the $244 million investment enables his company “to continue to position geothermal at the heart of 24/7 carbon-free energy production.”

Fervo says the latest VC round will support development of its 400-megawatt geothermal project in Beaver County, Utah. The Cape Station facility is expected to start generating power for the grid in 2026.

Geothermal investment is up, but health tech is down — plus more data-backed VC trend from 2024 so far. Photo via Getty Images

Report: Houston's VC trends so far in 2024 and what to watch for the rest of the year

by the numbers

Houston-based geothermal company Fervo Energy accounted for more than half of the venture capital raised by Houston-area startups in the first quarter of 2024.

The region’s VC haul in the first quarter totaled $462.4 million, according to the PitchBook-NCVA Venture Monitor. That’s up from $290.4 million during the same period in 2023 and from $285.8 million in the fourth quarter of last year. Click here to see the Q1 rounds as reported by InnovationMap.

Fervo’s latest funding round, announced in February, represented $244 million (52 percent) of the region’s VC total for the first quarter of 2024.

A report released in March by PitchBook indicated that VC funding last year for geothermal power reached $431 million across 21 deals. As of late February 25 — four days ahead of the Fervo announcement — $165.5 million in VC funding had been pumped into the geothermal sector this year, according to PitchBook.

“The recent VC deal activity with the geothermal power sector underscores a vibrant and evolving market, but still one that garners far less VC than other renewables,” says the report.

In all, Houston-area startups made 38 VC deals in this year’s first quarter, the PitchBook-NVCA Venture Monitor says. That’s down from 42 in the fourth quarter of 2023 and 43 in the first quarter of 2023. Nationwide, the deal count fell sharply in the first quarter of 2024 vs. the first and fourth quarters of last year.

The PitchBook-NVCA Venture Monitor report shows that nationwide, the $36.6 billion in VC investments recorded during the first quarter of 2024 “remained relatively on pace with the past year.”

“However, it would be a mistake to hyperfocus on the results of a single quarter whose results were a bit farther left on the bell curve than usual. The venture capital … business cycle effectively reset in recent years, and as of early 2024, it still appears to be searching for its level,” says the report.

“It is too early to tell where 2024 is going, but the game is on, and America’s VCs are ready for it,” the report adds. “In 2022, our world changed; in 2023, we accepted it was not changing back; and in 2024, we are building what is next.”

In a bit of good news for the Houston area, the report cites cleantech/energy as one of two sectors that venture capitalists should not overlook. The other sector: cybersecurity.

But in a bit of not-so-good news for the region, the report notes a slowdown in VC deals in the healthcare sector over the past two years in the wake of “pandemic-fueled capital exuberance.”

“Yet the healthcare sector differentiates itself from the rest of the market by demonstrating many unmet needs that could have a profound impact on society, particularly around disease diagnosis and treatment,” the report goes on to say. “On top of the immense opportunity set for disruption within healthcare, investor enthusiasm around AI adoption in drug development further speaks to the demand for better solutions in biotech through groundbreaking innovations.”

Houston was deemed a top startup city, but the Bayou City has a gap to other Texas cities that it can work on narrowing. Photo via Getty Images

Report: Houston secures spot on list of top 50 startup cities

by the numbers

A new ranking signals great promise for the growth of Houston’s startup network.

Houston ranks among the world’s top 50 startup cities on a new list from PitchBook, a provider of data and research about capital markets. In fact, Houston comes in at No. 50 in the ranking. But if you dig deeper into the data, Houston comes out on top in one key category.

The city earns a growth score of 63.8 out of 100 — the highest growth score of any U.S. city and the seventh highest growth score in the world. In the growth bucket, Houston sits between between Paris (64.4) and Washington, D.C. (61.7).

The PitchBook growth score reflects short-term, midterm, and long-term growth momentum for activity surrounding venture capital deals, exits, and fundraising for the past six years.

PitchBook’s highest growth score (86.5) goes to Hefei, a Chinese manufacturing hub for electric vehicles, solar panels, liquid crystal displays, home appliances, and Lenovo computers.

The overall ranking is based on a scoring system that relies on proprietary PitchBook data about private companies. The system’s growth and development scores are based on data related to deals, exits, fundraising and other factors.

Houston earns a development score of 34.1 out of 100, which puts it in 50th place globally in that regard. This score measures the size and maturity of a city’s startup network.

Topping the overall list is San Francisco, followed by New York City and Beijing. Elsewhere in Texas, Austin appears at No. 16 and Dallas at No. 36.

The ranking “helps founders, operators, and investors assess locations when deciding where to expand or invest,” says PitchBook.

“Network effects matter in venture capital: Investors get more than half of their deals through referrals, according to research led by Harvard professor Paul Gompers,” PitchBook goes on to say. “So it stands to reason that dealmakers should seek these networks out when deciding where to do business.”

Houston startups raised a combined $380 million in venture funding last quarter. Photo via Getty Images

Here's what Houston startups have raised in funding so far in 2024

Q1 2024 VC ACTIVITY

Seven Houston startups have started the new year strong with over $380 million in venture funding — most of which from one mega deal for a geothermal company.

According to InnovationMap reporting, Houston's VC activity in the first quarter of 2024 spanned industry and stage — from pre-seed to series E. It's a large chunk of money raised in Houston for one quarter — but not in terms of deals closed, at least compared to the previous quarter, in which startups raised over $170 million but across nine deals.

On the national side, it's not too different of a story. According to a quarterly report from PitchBook, the United State's VC activity for the start of the year "showed to be one of the slowest areas of the venture market during the quarter." Only $9.3 billion in capital was raised in the U.S. last quarter, which is only 11.3 percent of the total raised in the already slowed market of 2023.

"While dry powder remains high, slowed fundraising portends to LP hesitancy toward VC, and should predict a more difficult dealmaking environment down the road," reads an email from PitchBook. "During the past few years, large mega-funds drove fundraising trends, but Q1 VC fundraising shows there may be no appetite for such vehicles in today’s market."

These are the seven startup VC deals closed in Houston so far this year, according to reporting on InnovationMap.

Fervo Energy raises $244M in latest funding round

Fervo Energy scored a $244 million round of funding thanks to existing and new investors. Photo via Fervo Energy

An Oklahoma-based shale oil and gas leader has backed Fervo Energy's latest round of funding, supporting the startup's geothermal technology yet again.

Fervo announced its latest round of funding this week to the tune of $244 million. The round was led by Devon Energy, a company that's previously backed the startup.

“Demand for around-the-clock clean energy has never been higher, and next-generation geothermal is uniquely positioned to meet this demand,” Tim Latimer, Fervo CEO and co-founder, says in a news release. “Our technology is fully derisked, our pricing is already competitive, and our resource pipeline is vast. This investment enables Fervo to continue to position geothermal at the heart of 24/7 carbon-free energy production.” Read more about the round.

Procyrion secures $57.7M series E

Procyrion has announced the closing of its series E round of funding. Photo via Getty Images

Houston-born and bred medical device company, Procyrion, has completed its series E with a raise of $57.7 million, including the conversion of $10 million of interim financing.

Procyrion is the company behind Aortix, a pump designed to be placed in the descending thoracic aorta of heart failure patients, which has been shown to improve cardiac performance in seriously ill subjects. The money raised will allow the company to proceed with a the DRAIN-HF Study, a pivotal trial that will be used for eventual FDA approval and commercialization.

The Aortix is the brainchild of Houston cardiologist Reynolds Delgado. According to Procyrion’s CSO, Jace Heuring, Delgado, gained some of his experience with devices for the heart working with legendary Texas Heart Institute surgeon O.H. “Bud” Frazier. He filed his first patents related to the Aortix in 2005. Read more about the round.

Welligence Energy Analytics raises $41M series B

Houston-based Welligence Energy Analytics specializes in data and intelligence for the oil and gas markets, greenhouse gas emissions sector, and CCUS projects. Photo via Getty Images

A group of investors has chipped in $41 million to purchase a minority stake in Houston-based Welligence Energy Analytics, a provider of energy data and intelligence.

Boston-based venture capital firm Elephant Partners led the series B round, with participation from Veriten, a Houston-based, energy-focused research, investing, and strategy firm, and EDG, a Metairie, Louisiana-based energy consulting firm. Several executives from the energy, information services, and software sectors also contributed to the round.

Founded in 2016, Welligence specializes in data and intelligence for the oil and gas markets, greenhouse gas emissions sector, and carbon capture, storage, and utilization (CCUS) projects. Clients include major oil and gas companies, as well as large investment banks. Read more about the round.

Motif Neurotech secures nearly $19M series A

Motif Neurotech, which develops minimally invasive bioelectronics for mental health treatment, closed its series A round with an oversubscribed $18.75 million. Photo via Rice.edu

A health tech startup based out of a newly formed accelerator program at Rice University has raised venture funding.

Motif Neurotech closed its series A round with an oversubscribed $18.75 million. The company, which develops minimally invasive bioelectronics for mental health treatment, was formed out of the Rice Biotech Launch Pad that launched last fall.

The round was led by Arboretum Ventures, with participation from new investors KdT Ventures, Satori Neuro, Dolby Family Ventures, re.Mind Capital and existing investors Divergent Capital, TMC Venture Fund, PsyMed Ventures, Empath Ventures and Capital Factory. Read more about the round.

Sage Geosystems closes $17M series A 

Houston-based Sage Geosystems announced the first close of $17 million round led by Chesapeake Energy Corp. Photo via sagegeosystems.com

A Houston geothermal startup has announced the close of its series A round of funding.

Houston-based Sage Geosystems announced the first close of $17 million round led by Chesapeake Energy Corp. The proceeds aim to fund its first commercial geopressured geothermal system facility, which will be built in Texas in Q4 of 2024. According to the company, the facility will be the first of its kind.

The venture is joined by technology investor Arch Meredith, Helium-3 Ventures and will include support from existing investors Virya, LLC, Nabors Industries Ltd., and Ignis Energy Inc.

“The first close of our Series A funding and our commercial facility are significant milestones in our mission to make geopressured geothermal system technologies a reality,” Cindy Taff, CEO of Sage Geosystems, says in a news release. “The success of our GGS technologies is not only critical to Sage Geosystems becoming post-revenue, but it is an essential step in accelerating the development of this proprietary geothermal baseload approach. Read more about the round.

Ema raises $2M round of bridge funding

Ema, which operates as a health and wellness-focused, AI-based chat for women, has raised additional funding. Screenshot courtesy of Ema

A Houston-based startup that's improving health and wellness for women with its artificial intelligence-backed platform has raised a bridge round of funding.

Ema closed its latest bridge round, bringing its total funding to nearly $2 million. The company received investment from Kubera's Venture Capital and Victorum Capital, which joined existing investors Hearst Labs, Wormhole Capital, Acumen America, and Techstars.

Ema strives to deliver "personalized, empathetic, and evidence-based support" to its users through its generative AI technology. The platform has more than 100,000 users, and has expanded into the B2B sector with $100,000 in contracts within just 30 days after pivoting to this model, according to the company. Read more about the round.

TrueLeap Inc. raises oversubscribed $610,000 pre-seed round

The edtech company offers a comprehensive approach to shrinking the digital divide with a suite of technology including software, hardware, and more. Photo courtesy of TrueLeap

An edtech startup has just secured funding to further its mission of increasing accessibility to education.

TrueLeap Inc., global digital education startup addressing the digital divide in education, has raised $610,000, which is over its target of $500,000. The round was led by United Kingdom-based Maya Investments Limited.

"This oversubscribed funding round, led by Maya Investments Limited, is a testament to the urgent need for innovative educational technologies in emerging markets. Our commitment to providing affordable and integrated solutions is stronger than ever," says Sandip Bordoloi, CEO and Co-Founder of TrueLeap, in a news release. Read more about the round.

Despite its VC growth over the past few years, Houston startups saw a setback in funding in 2023. Photo via Getty Images

Report: Houston sees significant dip in VC activity in 2023

by the numbers

The amount of venture capital pumped into Houston-area companies shriveled in 2023, dropping to its lowest level since the pandemic year of 2020.

The latest PitchBook-NVCA Venture Monitor shows Houston-area businesses collected nearly $1.5 billion in venture capital in 2023, down from more than $2.2 billion in 2022 and over $2.6 billion in 2021. The amount of venture capital fell below $1 billion in both 2019 and 2020.

Houston-based Axiom Space accounted for the biggest chunk of the region’s VC haul in 2023 — a series C round worth $350 million. According to InnovationMap reporting, other local startups leading the way last year in VC were:

Here are Houston area’s full VC numbers for the past five years, according to the PitchBook-NVCA report:

  • 2023 — $1.478 billion
  • 2022 — $2.207 billion
  • 2021 — $2.625 billion
  • 2020 — $718.94 million
  • 2019 — $950.76 million

Across the country last year, $170.6 billion was invested in private companies, says the report — down $71.6 billion from 2022 and roughly half the sum invested in 2021.

In the report, Bobby Franklin, president and CEO of NVCA, notes that while the continued drop in U.S. venture capital activity “does not lend itself to optimism, it would be a mistake to declare the market in crisis. Rather, the market has changed. From interest rates to foreign conflict, the world looks very different than it did two years ago, and a new set of problems needs to be solved for.”

Ad Placement 300x100
Ad Placement 300x600

CultureMap Emails are Awesome

Intuitive Machines forms partnership with Italian companies for lunar exploration services

to the moon

Houston-based space technology, infrastructure and services company Intuitive Machines has forged a partnership with two Italian companies to offer infrastructure, communication and navigation services for exploration of the moon.

Intuitive Machines’ agreement with the two companies, Leonardo and Telespazio, paves the way for collaboration on satellite services for NASA, a customer of Intuitive Machines, and the European Space Agency, a customer of Leonardo and Telespazio. Leonardo, an aerospace, defense and security company, is the majority owner of Telespazio, a provider of satellite technology and services.

“Resilient, secure, and scalable space infrastructure and space data networks are vital to customers who want to push farther on the lunar surface and beyond to Mars,” Steve Altemus, co-founder and CEO of Intuitive Machine, said in a news release.

Massimo Claudio Comparini, managing director of Leonardo’s space division, added that the partnership with Intuitive Machines is a big step toward enabling human and robotic missions from the U.S., Europe and other places “to access a robust communications network and high-precision navigation services while operating in the lunar environment.”

Intuitive Machines recently expanded its Houston Spaceport facilities to ramp up in-house production of satellites. The company’s first satellite will launch with its upcoming IM‑3 lunar mission.

Intuitive Machines says it ultimately wants to establish a “center of space excellence” at Houston Spaceport to support missions to the moon, Mars and the region between Earth and the moon.

Houston hospitals win $50M grant for ibogaine addiction treatment research

ibogaine funding

The Texas Health and Human Services Commission has awarded $50 million to UTHealth Houston in collaboration with The University of Texas Medical Branch at Galveston (UTMB Health) to co-lead a multicenter research trial to evaluate the effect of ibogaine, a powerful psychoactive compound, on patients suffering from addiction, traumatic brain injury and other behavioral health conditions.

The funding will establish a two-year initiative—known as Ibogaine Medicine for PTSD, Addiction, and Cognitive Trauma (IMPACT)—and a consortium of Texas health institutions focused on clinical trials and working toward potential FDA-approved treatments.

The consoritum will also include Texas Tech University, Texas Tech University Health Sciences Center El Paso, The University of Texas at Austin, The University of Texas Health Science Center at San Antonio, The University of Texas at Tyler, The University of Texas Rio Grande Valley, Texas A&M University, The University of North Texas Health Science Center, Baylor College of Medicine and JPS Health Network in Dallas.

Ibogaine is a plant-based, psychoactive substance derived from the iboga shrub. Research suggests that the substance could be used for potential treatment for patients with traumatic brain injuries, which is a leading cause of post-traumatic stress disorders. Ibogaine has also shown potential as a treatment for addiction and other neurological conditions.

UTHealth and partners will focus on ways that ibogaine can treat addiction and associated conditions. Meanwhile, UT Austin and Baylor College of Medicine will concentrate on using it to treat traumatic brain injury, especially in veterans, according to a news release from the institutions.

The consortium will also support drug developers and teaching hospitals to conduct FDA-approved clinical trials. The Texas Health and Human Services Commission will oversee the grant program.

“This landmark clinical trial reflects our unwavering commitment to advancing research that improves lives and delivers the highest standards of care,” Dr. Melina Kibbe, UTHealth Houston president and the Alkek-Williams Distinguished Chair, said in the news release. “By joining forces with outstanding partners across our state, we are building on Texas’ tradition of innovation to ensure patients struggling with addiction and behavioral health conditions have access to the best possible outcomes. Together, we are shaping discoveries that will serve Texans and set a model for the nation.”

The consortium was authorized by the passage of Senate Bill 2308. The bill provides $50 million in state-matching funds for an ibogaine clinical trial managed by a public university in partnership with a drug company and a hospital.

“This is the first major step towards the legislature’s goal of obtaining FDA approval through clinical trials of ibogaine — a potential breakthrough medication that has brought thousands of America’s war-fighters back from the darkest parts of depression, anxiety, PTSD, and chronic addiction,” Texas Rep. Cody Harris added in the release. “I am excited to walk alongside UTHealth Houston and UTMB as these stellar institutions lead the nation in a first-of-its-kind clinical trial in the U.S.”

Recently, the University of Houston also received a $2.6 million gift from the estate of Dr. William A. Gibson to support and expand its opioid addiction research, which includes the development of a fentanyl vaccine that could block the drug's ability to enter the brain. Read more here.

Tesla no longer world's biggest EV maker as sales fall for second year

Tesla Talk

Tesla lost its crown as the world’s bestselling electric vehicle maker as a customer revolt over Elon Musk’s right-wing politics, expiring U.S. tax breaks for buyers and stiff overseas competition pushed sales down for a second year in a row.

Tesla said that it delivered 1.64 million vehicles in 2025, down 9% from a year earlier.

Chinese rival BYD, which sold 2.26 million vehicles last year, is now the biggest EV maker.

It's a stunning reversal for a car company whose rise once seemed unstoppable as it overtook traditional automakers with far more resources and helped make Musk the world's richest man. The sales drop came despite President Donald Trump's marketing effort early last year when he called a press conference to praise Musk as a “patriot” in front of Teslas lined up on the White House driveway, then announced he would be buying one, bucking presidential precedent to not endorse private company products.

For the fourth quarter, Tesla sales totaled 418,227, falling short of even the much reduced 440,000 target that analysts recently polled by FactSet had expected. Sales were hit hard by the expiration of a $7,500 tax credit for electric vehicle purchases that was phased out by the Trump administration at the end of September.

Tesla stock fell 2.6% to $438.07 on Friday.

Even with multiple issues buffeting the company, investors are betting that Tesla CEO Musk can deliver on his ambitions to make Tesla a leader in robotaxi services and get consumers to embrace humanoid robots that can perform basic tasks in homes and offices. Reflecting that optimism, the stock finished 2025 with a gain of approximately 11%.

The latest quarter was the first with sales of stripped-down versions of the Model Y and Model 3 that Musk unveiled in early October as part of an effort to revive sales. The new Model Y costs just under $40,000 while customers can buy the cheaper Model 3 for under $37,000. Those versions are expected to help Tesla compete with Chinese models in Europe and Asia.

For fourth-quarter earnings coming out in late January, analysts are expecting the company to post a 3% drop in sales and a nearly 40% drop in earnings per share, according to FactSet. Analysts expect the downward trend in sales and profits to eventually reverse itself as 2026 rolls along.

Musk said earlier last year that a “major rebound” in sales was underway, but investors were unruffled when that didn't pan out, choosing instead to focus on Musk's pivot to different parts of business. He has has been saying the future of the company lies with its driverless robotaxis service, its energy storage business and building robots for the home and factory — and much less with car sales.

Tesla started rolling out its robotaxi service in Austin in June, first with safety monitors in the cars to take over in case of trouble, then testing without them. The company hopes to roll out the service in several cities this year.

To do that successfully, it needs to take on rival Waymo, which has been operating autonomous taxis for years and has far more customers. It also will also have to contend with regulatory challenges. The company is under several federal safety investigations and other probes. In California, Tesla is at risk of temporarily losing its license to sell cars in the state after a judge there ruled it had misled customers about their safety.

“Regulatory is going to be a big issue,” said Wedbush Securities analyst Dan Ives, a well-known bull on the stock. “We're dealing with people's lives.”

Still, Ives said he expects Tesla's autonomous offerings will soon overcome any setbacks.

Musk has said he hopes software updates to his cars will enable hundreds of thousands of Tesla vehicles to operate autonomously with zero human intervention by the end of this year. The company is also planning to begin production of its AI-powered Cybercab with no steering wheel or pedals in 2026.

To keep Musk focused on the company, Tesla’s directors awarded Musk a potentially enormous new pay package that shareholders backed at the annual meeting in November.

Musk scored another huge windfall two weeks ago when the Delaware Supreme Court reversed a decision that deprived him of a $55 billion pay package that Tesla doled out in 2018.

Musk could become the world's first trillionaire later this year when he sells shares of his rocket company SpaceX to the public for the first time in what analysts expect would be a blockbuster initial public offering.