Portal Space Systems
Facts
- HQ
- Seattle area, USA
- Sectors
- Defense and Space Manufacturing
- Founded
- 2021
- Employees
- 51
- Stage
- startup
- Total raised
- $61.5M SEC Form D filings Total of this company's SEC Form D filings
- Last round
- $61.5M · Mar 2026 SEC Form D
- Founders
- Jeff Thornburg, Prashaanth Ravindran, Ian Vorbach
GeekWire and Greater Seattle Partners call for nominations for 2026 Uncommon Thinkers; deadline Sept. 18, winners honored Dec. 10
Nominations for GeekWire’s 2026 Uncommon Thinkers Awards — honoring Seattle-area inventors, scientists, technologists and entrepreneurs — close Friday, Sept. 18 at 11 a.m. PT; winners will be chosen by a judges panel and celebrated at the GeekWire Gala on Dec. 10. The fourth annual program, run with Greater Seattle Partners, seeks nominees who demonstrate innovation, leadership and measurable impact.
Portal Space Systems and Rebel Space develop onboard spectrum-monitoring for maneuverable satellites to detect RF interference
Portal Space Systems and Rebel Space are working to add onboard spectrum-monitoring technology to Portal’s maneuverable spacecraft so they can detect and characterize RF interference and electronic threats in orbit, rather than relying only on ground-based sensing. The collaboration could enable real-time attribution, geolocation and potential responses to jamming or suspicious electromagnetic activity for commercial and military satellites.
Portal Space Systems to Launch Starburst-1 in October; Developing 1,100‑lb Supernova with Solar Thermal Propulsion
Portal Space Systems is preparing to ship its first Starburst-1 satellite to Florida for an October launch on SpaceX’s Bandwagon-5 rideshare while advancing plans for a larger, 1,100-pound Supernova spacecraft that will use solar thermal propulsion for greater orbital maneuverability.
Zenno Astronautics' 3,500 A·m² Superconducting Supertorquer Cleared for Flight on Portal Space Systems' Starburst-1
Zenno Astronautics' superconducting Supertorquer, a propellant-free magnetic attitude control system producing up to 3,500 A·m², is integrated on Portal Space Systems' Starburst-1 and in final qualification ahead of flight. The Starburst-1 mission will demonstrate rendezvous, rapid retasking and orbital change over a year and validate subsystems for Portal's larger Supernova vehicle.
Seattle Tech Week 2026 Draws ~250 Events Over Five Days, Showcasing City’s Tech Talent and Innovation
Seattle Tech Week 2026 ran five days with roughly 250 events across diverse venues, celebrating Seattle’s dense tech talent and community connections while highlighting themes from founders, investors, and academics. Organizers view the event as a community-led showcase that reinforced Seattle’s historic and ongoing contributions to cloud, AI, and other innovations.
K2 Space Opens Seattle Engineering Office to Support Production of Mega-Class Satellites with $1 Billion in Contracts
K2 Space, a California-based company specializing in large, high-power satellites for government and commercial clients, is opening an engineering office in the Seattle area to support its growth. The company has raised over $500 million, secured $1 billion in contracts, and plans to produce hundreds of satellites annually by 2030.
Starcloud Becomes Fastest Y Combinator Unicorn at $1.1B as Fusion Leader Helion Tops GeekWire 200 with $15.5B Valuation
The latest GeekWire 200 highlights a shift in the Pacific Northwest startup scene toward physical products like rockets, fusion reactors, and space-based data centers, with Starcloud becoming the fastest Y Combinator unicorn valued at $1.1 billion. Helion maintains the top spot with a $15.5 billion valuation, while notable companies like Stoke Space, Overland AI, and new unicorn XBOW also make significant moves.
SpaceX's $75 Billion IPO Expected to Boost Seattle's Space Industry and Elevate Company Valuation to $1.77 Trillion
SpaceX's upcoming $75 billion IPO on Nasdaq is projected to boost its valuation to $1.77 trillion and benefit Seattle's space sector by providing capital for satellite and Starship expansion, potentially lowering launch costs and aiding local startups. The Seattle area's connection to SpaceX dates back to 2015, and regional startups like Starcloud and Portal Space Systems stand to gain from this growth.
Jeff Thornburg announces Portal Space Systems’ $50M Series A funding to advance on-orbit maneuverability
Portal Space Systems announced a $50 million Series A round, with returning and new investors backing the company's mission to deliver on-orbit maneuverability; the founder Jeff Thornburg emphasized team and investor alignment over hardware focus.
Seattle Startups Raised $1.5B in Q1 2026 with Lowest Deal Count Since 2020, Ranking 7th in VC Capital Invested
Seattle-area startups raised $1.5 billion across 69 deals in Q1 2026, marking the lowest deal count since mid-2020 amid a trend of larger funding rounds concentrated in fewer companies, particularly in AI. The Seattle region ranked seventh nationally by capital invested but tenth by deal count, reflecting a national pattern of venture capital focusing on a small number of high-profile startups.
Portal Space Systems' Mini-Nova Demonstration Payload Launched on SpaceX Falcon 9 for Maneuverable Spacecraft Tests
Portal Space Systems launched its first orbital payload, Mini-Nova, aboard SpaceX’s Falcon 9 during the Transporter-16 rideshare mission to test technologies for maneuverable space vehicles. The payload will remain attached to Momentus’ Vigoride-7 for six months to validate critical systems for future spacecraft focused on rapid orbital maneuvering and space servicing.
Portal Space Systems and Paladin Space Launch Debris Removal Service to Tackle Orbital Junk Starting 2024
Portal Space Systems and Paladin Space are partnering to offer Debris Removal as a Service (DRAAS), using Portal’s maneuverable spacecraft and Paladin’s Triton payload to track and remove small-to-medium sized orbital debris. Starburst-1 is set to launch this year, with the larger Supernova platform debuting in 2027, aiming to reduce space junk threats for satellite operators.
GeekWire Honors Six 'Uncommon Thinkers' Transforming Industries with Innovative Startups in 2025
GeekWire's third annual 'Uncommon Thinkers' honors six innovators including Anindya Roy, Kiana Ehsani, and Jeff Thornburg, who are leading startups transforming industries with breakthrough technologies in biotech, social media, and space propulsion. These leaders will be celebrated at the GeekWire Gala in Seattle for their creative and mission-driven approaches to solving significant challenges.
Washington Allocates $350K to Portal Space Systems for 50,000-Sq-Ft Satellite Factory Expansion in Bothell
Washington Gov. Bob Ferguson is allocating $350,000 to support Portal Space Systems' expansion of a 50,000-square-foot satellite manufacturing facility in Bothell, aiming to produce four spacecraft per month by 2027 and create over 700 jobs by 2030.
Portal Space Systems to Launch Starburst Maneuverable Spacecraft in 2026 on SpaceX’s Transporter-18 Mission
Portal Space Systems is launching Starburst, a rapid-maneuverability spacecraft leveraging technologies from its Supernova platform, with a first mission planned for 2026 on SpaceX’s Transporter-18. Starburst aims to enhance satellite constellation operations for national security and commercial use.
Portal Space Systems Raises $17.5M to Develop Solar Thermal Propulsion Spacecraft with 2026 Launch
Portal Space Systems raised $17.5 million in seed funding led by AlleyCorp to develop its Supernova spacecraft, which uses solar thermal propulsion for rapid orbital maneuvers. The company plans to demonstrate the technology with a launch scheduled for mid-2026.
People
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Jeff Thornburg Founder, CEO & Co-founder
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Prashaanth Ravindran Founder, Co-founder, Director
