Why it matters
Sierra Space is Sierra Nevada Corporation's commercial-space subsidiary, spun out in April 2021 and still chaired by founder Fatih Ozmen, with Dan Jablonsky as CEO. It is trying to sell both a runway-landing spaceplane and proliferated missile-warning satellites from the same Colorado industrial base.
The satellite line is the one with a current government award. On 13 July 2026 the Space Development Agency gave Sierra a firm-fixed-price agreement with a total potential value of $798 million for 18 missile-warning/tracking satellites, to be available for launch by the end of 2028. Dream Chaser Tenacity still has to complete its first orbital flight.
History
Sierra Nevada Corporation created Sierra Space as a standalone company in April 2021, headquartered in Louisville, Colorado, for Dream Chaser, commercial stations, and space systems. Wikipedia records more than 500 missions and 4,000 space systems of SNC-era heritage behind that spin-out. A November 2021 Series A of $1.4 billion valued the company at $4.5 billion.
NASA had already selected Dream Chaser for Commercial Resupply Services-2. With Blue Origin, Sierra later received a $130 million award to mature Orbital Reef, the mixed-use commercial station. After 165 layoffs in November 2023 and further cuts in October 2024, Jablonsky, formerly of Maxar and Ursa Major, became CEO in February 2026. The March 2026 Series C added $550 million at an $8 billion valuation.
Technology and products
Dream Chaser is a reusable lifting-body spaceplane designed to return cargo at less than 1.5 g and land on a 737-class runway. Sierra's 2 September 2026 release says Tenacity will launch from Kennedy Space Center, fly a multi-day free-flyer with mixed NASA CRS, undisclosed national-security, and commercial payloads, and land at Vandenberg. The company is still finalizing the manifest and did not name a launch day. Aviation Week reported in September that Sierra still expected that Vulcan flight this year.
Defense satellites sit on the Eclipse line. SDA's 13 July 2026 AMDT3 award funds 18 Sierra missile-warning/tracking vehicles across two orbital planes, paired with a $955 million L3Harris award for 18 missile-defense-variant spacecraft, with vehicles expected to be available for launch by the end of 2028.
LIFE is Sierra's inflatable habitat contribution to Orbital Reef. A January 2024 full-scale burst test that the company said exceeded safety margins by 27% is the main published structural evidence. Ghost, a deployable-decelerator reentry vehicle pitched for 90-minute global delivery and up to five years on orbit, completed balloon drop tests from 35,000 ft and 68,500 ft at Dugway in May 2026 during U.S. Space Command's Apollo Nexus exercise. It has not flown from orbit.
Business model
Near-term funded work is national-security satellite production plus heritage subsystems. Dream Chaser is being sold as a multi-customer logistics platform on a first flight that still has to prove runway return, with NASA cargo remaining on the manifest under CRS. Orbital Reef is a NASA-demand business: the 9 October 2026 Commercial LEO Destination Contract request for proposals is the government gate that would underwrite a station, with industry responses due 8 December. Ghost remains a drop-tested concept, not an orbital revenue line.
Financials
Sierra Space is private. Wikipedia records a $1.4 billion Series A at $4.5 billion in 2021 and a $550 million Series C in March 2026, led by LuminArx Capital Management, at an $8 billion valuation. The AMDT3 figure is a $798 million contract ceiling, not recognized revenue.
Wikipedia lists about 2,000 employees. The pinned record uses a third-party figure of about 1,300 as of August 2026. Those counts have not been reconciled. Current revenue is undisclosed in the sources opened for this overview.
Competition and constraints
Tenacity has to complete a free-flyer before it can compete for later NASA cargo orders, and Sierra has not posted a date. For stations, Ars Technica reported that Axiom Space, Voyager's Starlab, and Vast said they will compete for the CLDC award, that NASA plans to select two or more contractors with a decision in April, and that questions remain about Blue Origin's commitment. SpaceX appears unlikely to bid. For missile warning, L3Harris is the AMDT3 missile-defense-variant prime at about $955 million. Launch of Tenacity still depends on ULA Vulcan.
What to watch
Watch whether Tenacity actually flies on Vulcan before the end of 2026. Sierra has signed mixed payloads and, as of September, still pointed to a 2026 debut, but the 2 September release names no day.
Watch whether Blue Origin and Sierra file Orbital Reef by 8 December. Axiom, Starlab, and Vast have said they will compete; Ars reported open questions about Blue Origin's commitment. Watch AMDT3 manufacturing toward an end-2028 launch-ready date, and whether Ghost moves from balloon drops to an orbital test.