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Lilium did not simply disappear after the December 2024 reports that it had ceased operations. The electric-aircraft startup stopped operating and laid off about 1,000 workers on or around December 23, 2024, after failing to secure enough financing. A short-lived rescue transaction transferred operations to a new company, Lilium Aerospace, in early January 2025 and temporarily preserved roughly 775 jobs. That rescue failed when essential follow-on funding did not arrive, and Lilium Aerospace filed for insolvency and stopped operations on February 21, 2025.
The company’s technology also had a post-collapse life: Archer Aviation bought approximately 300 Lilium patent assets for €18 million in October 2025. That sale did not revive Lilium as an aircraft manufacturer.
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What happened to Lilium?
Lilium, the German electric vertical-takeoff-and-landing aircraft startup, ran out of financing while its aircraft was still in development and years away from commercial delivery. Its principal German operating subsidiaries, Lilium GmbH and Lilium eAircraft GmbH, filed for insolvency in late October 2024 after a government-backed financing route failed.
By December 23, Lilium had ceased operations and laid off approximately 1,000 employees, according to contemporaneous reporting. The immediate shutdown was followed by an attempted rescue rather than a clean, final liquidation. On December 24, an investor consortium agreed to acquire the operating subsidiaries through a new structure. Business operations moved to Lilium Aerospace in early January 2025 after substantial parts of the purchase price were paid.
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That continuation was temporary. Lilium Aerospace filed for insolvency on February 21, 2025, after the financing needed to keep the business operating failed to materialize. The company said a restructuring was highly unlikely and that operations would stop.
The accurate timeline is: initial shutdown and mass layoffs in December 2024; temporary continuation under Lilium Aerospace in January 2025; final reported operational stop after the successor’s insolvency filing on February 21, 2025.
Lilium’s collapse timeline
| Date | Event | Why it mattered |
|---|---|---|
| October 17, 2024 | Germany’s federal budget committee declined to approve a €50 million guarantee connected to a proposed €100 million convertible loan. | Lilium lost a crucial element of its planned government-backed financing. Lilium and Bavaria also had not reached agreement on an additional guarantee. |
| October 28–29, 2024 | Lilium GmbH and Lilium eAircraft GmbH filed for insolvency and sought self-administration. | The operating subsidiaries could no longer obtain enough financing to continue normally. |
| November 2024 | Lilium pursued an M&A and asset-sale process with KPMG’s assistance. | The company warned in a U.S. Securities and Exchange Commission filing that liquidation was possible and that it did not expect proceeds for Lilium or its shareholders. |
| December 23, 2024 | Lilium ceased operations and laid off about 1,000 workers. | This was the shutdown reported in the original headline. |
| December 24, 2024 | An investor consortium agreed to acquire the operating subsidiaries through a new structure. | The transaction created a chance to preserve the aircraft program and jobs. |
| Early January 2025 | Operations transferred to Lilium Aerospace. | Approximately 775 jobs were temporarily preserved. |
| February 21, 2025 | Lilium Aerospace filed for insolvency. | The necessary follow-on financing had not materialized, and operations stopped. |
| March 12, 2025 | Lilium N.V. disclosed that regular insolvency proceedings had begun. | The proceedings were intended to wind up the company, with shareholders not expected to receive distributions. |
| October 15, 2025 | Archer Aviation acquired much of Lilium’s patent and registered-intellectual-property portfolio. | The transaction transferred important technology assets without reviving Lilium’s operating business. |
Why did Lilium fail?
The central problem was a financing shortfall, not one isolated missed loan payment. Lilium was attempting to fund an expensive aircraft-development program while it remained years from commercial delivery. It needed private capital and government-backed support at the same time that investors were being asked to finance certification, manufacturing, testing, infrastructure and other costs that precede aircraft revenue.
In October 2024, Lilium said Germany’s federal budget committee would not approve the proposed guarantee for a €100 million convertible loan. The company and Bavaria also failed to reach an agreement on a further guarantee. Without that support, the German subsidiaries entered insolvency.
Lilium then tried to find buyers or investors through an M&A and asset-sale process. That effort produced the December consortium transaction and the January transfer to Lilium Aerospace, but the new company still required additional financing. When that funding failed to arrive, the rescue could not continue.
Lilium N.V.’s SEC disclosures said the company could not raise sufficient funds to continue its business and that its board no longer believed a positive going-concern position existed. In practical terms, the company’s cash needs outlasted its ability to raise money.
What happened to the 1,000 workers?
The approximately 1,000 layoffs reported in December 2024 represented most of Lilium’s workforce at the initial shutdown. The later figure of roughly 775 jobs temporarily preserved under Lilium Aerospace is not a contradiction. It describes a different stage of the restructuring and a different employing entity.
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The rescue company briefly retained a substantial workforce so development could potentially continue. That preservation did not become a durable restart: Lilium Aerospace entered insolvency in February 2025, and the successor’s operations stopped.
The available reporting does not establish an exact final layoff total for every stage of the process. The most accurate descriptions remain “about 1,000 layoffs” for the December shutdown and “approximately 775 jobs temporarily preserved” during the January rescue.
What was Lilium building?
Lilium was developing the Lilium Jet, an all-electric vertical-takeoff-and-landing aircraft, commonly grouped with the emerging eVTOL or advanced-air-mobility sector. Its design used electric propulsion and distributed ducted-fan technology rather than conventional aircraft engines.
Before the collapse, Lilium reported that its first full-scale aircraft had reached an initial low-voltage power-on milestone and that two aircraft were in final assembly. Those were development milestones—not evidence that the aircraft had entered commercial service, completed certification or begun regular passenger operations.
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Did Lilium’s technology disappear?
No. The operating company failed, but parts of its intellectual property remained valuable. On October 15, 2025, insolvency administrator PLUTA announced the sale of Lilium’s patents and registered intellectual-property rights to Archer Aviation.
Archer said it won a competitive bid for approximately 300 advanced-air-mobility patent assets for €18 million. The portfolio included technology related to:
- high-voltage systems;
- battery management;
- aircraft design;
- flight controls;
- electric engines;
- propellers; and
- ducted fans.
The patent sale should not be confused with an acquisition of the entire Lilium aircraft program. A FlightGlobal report said two Lilium Jet prototypes were separate from Archer’s patent purchase and remained among the assets being considered for sale at that time. PLUTA also said remaining assets would continue to be realized for creditors.
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Lilium’s corporate structure made the outcome more complicated than a single factory closure. Lilium N.V. was the listed parent, while Lilium GmbH and Lilium eAircraft GmbH were among the German operating subsidiaries that entered insolvency. Lilium Aerospace was a successor company created for the attempted rescue.
In its SEC disclosures, Lilium warned that insolvency proceedings could lead to liquidation and that proceeds would first be used for insolvency costs and creditors. In March 2025, the company said Class A shareholders should not expect distributions.
That is a familiar risk in capital-intensive startups: an operating business can have valuable patents, prototypes or other assets while still leaving little or nothing for equity holders after secured claims, insolvency expenses and other creditor obligations are addressed.
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Why the original “ceased operations” report needs a date qualifier
The December 2024 report was materially correct when published. Lilium had stopped operating at that point and about 1,000 employees had lost their jobs. But “ceased operations” did not mean that every Lilium-related entity, asset or legal proceeding ended on that date.
The December 24 rescue announcement came one day later. Operations then transferred to Lilium Aerospace in early January, temporarily preserving about 775 jobs. The final reported operational stop came after Lilium Aerospace filed for insolvency on February 21, 2025.
For that reason, a current description should not say that Lilium “never found an investor.” It did find a consortium willing to complete a rescue transaction, but the successor could not secure the additional financing required to continue. Nor should a current report imply that Lilium resumed production, achieved certification or entered passenger service; the available evidence supports none of those claims.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What this says about electric-aircraft startups
Lilium’s collapse illustrates the unusually long funding runway required to bring a new aircraft from design to commercial operation. The company had to finance an aircraft program before it could generate meaningful delivery revenue, while also navigating certification, production scale-up, supply-chain commitments and infrastructure questions.
It also shows why government guarantees can be pivotal in emerging aviation markets. The proposed German support was not the whole of Lilium’s funding plan, but its failure weakened the company’s ability to attract or secure the capital needed to continue. The subsequent investor transaction bought time, not financial independence.
Finally, the Archer transaction demonstrates that an aircraft startup’s intellectual property may retain value even after its business fails. That does not mean the original product will reach the market. It means individual technologies can be separated from the company, sold to another aviation developer and potentially used in a different commercial strategy.
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Bottom line
Lilium’s December 2024 shutdown was the first major operational collapse, not the final entry in the story. About 1,000 workers were laid off after financing efforts failed. A rescue briefly transferred operations to Lilium Aerospace and preserved around 775 jobs, but that company filed for insolvency on February 21, 2025, after follow-on financing failed. By October 2025, Archer Aviation had acquired approximately 300 Lilium patent assets for €18 million, while the remaining assets continued through insolvency proceedings.
Lilium’s aircraft program therefore ended as a commercial operating business, even though some of its technology survived as intellectual property.
Frequently Asked Questions
When did Lilium cease operations?
Lilium’s initial shutdown and layoffs were reported on or around December 23, 2024. Operations briefly continued under successor company Lilium Aerospace after a January 2025 rescue transaction, but Lilium Aerospace filed for insolvency and stopped operations on February 21, 2025.
How many Lilium employees lost their jobs?
About 1,000 workers were laid off during the December 2024 shutdown. A later rescue temporarily preserved approximately 775 jobs under Lilium Aerospace, but that arrangement ended when the successor entered insolvency.
Did Lilium ever produce a certified passenger aircraft?
The available evidence does not show that the Lilium Jet entered commercial passenger service or completed certification. Lilium had reported development milestones, including an initial low-voltage power-on milestone and aircraft in final assembly, but those are not commercial-service milestones.
Who bought Lilium’s patents?
Archer Aviation acquired approximately 300 Lilium patent and registered-intellectual-property assets in October 2025 for €18 million, according to Archer and insolvency administrator PLUTA. The acquisition did not amount to a revival of Lilium’s operating company.
What happened to Lilium shareholders?
Lilium’s SEC disclosures said insolvency proceeds would first go to costs and creditors. In March 2025, the company said Class A shareholders should not expect distributions.
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