Series Unknown Funded Science and Engineering Startups
Across these 50 “Science and Engineering” deals labeled “Series Unknown,” the largest disclosed round is Climeworks at $162M on 2025-07-02, and it sits far…
Across these 50 “Science and Engineering” deals labeled “Series Unknown,” the largest disclosed round is Climeworks at $162M on 2025-07-02, and it sits far above the next-largest disclosed amounts (CDB Aviation’s $700M on 2025-05-20 is the actual largest disclosed amount, with $162M the largest after that). CDB Aviation at $700M on 2025-05-20 is the clearest outlier: most other disclosed rounds cluster below $100M, including Vertical Aerospace at $60M (2025-07-09), Fusion Fuel at $4M (2025-07-23), and multiple sub-$10M rounds such as Air Space Intelligence’s $350K (2025-08-15) and Quantum Space’s $60K (2025-02-19). Geographically, the list is concentrated in the US and Europe: San Francisco appears as a base for Astro Mechanica (2025-08-20, undisclosed) and Air Space Intelligence (2025-08-15, $350K), while Dublin, Ireland shows up for Fusion Fuel (2025-07-23, $4M) and CDB Aviation (2025-05-20, $700M). Temporally, rounds span from 2023-09-11 (Theion) through 2025-08-20 (Astro Mechanica), with the most recent 90 days running roughly from late May to August 2025.
Most recent rounds
50 shownRelated listings
Frequently asked
Which disclosed round is the outlier in this segment, and how does it compare to the rest of the disclosed amounts?
CDB Aviation’s $700M round on 2025-05-20 is a standout outlier; the largest other disclosed amount after it is Climeworks at $162M on 2025-07-02. Many other disclosed rounds are in the tens of millions or below, including Vertical Aerospace at $60M (2025-07-09) and Sicona Battery Technologies at $27M (2025-05-20).
How concentrated are deals around the most recent time window shown?
In the most recent 90 days of the table (roughly May–August 2025), several disclosed rounds appear, including CDB Aviation $700M (2025-05-20), Sicona Battery Technologies $27M (2025-05-20), Climeworks $162M (2025-07-02), and Vertical Aerospace $60M (2025-07-09). Earlier in the range, the smallest disclosed rounds include Quantum Space at $60K (2025-02-19) and Laska at $10K (2024-08-16).
Are any cities or countries over-represented in “Science and Engineering” deals here?
San Francisco, California appears more than once: Astro Mechanica (2025-08-20, undisclosed) and Air Space Intelligence (2025-08-15, $350K). Dublin, Ireland also repeats with Fusion Fuel ($4M on 2025-07-23) and CDB Aviation ($700M on 2025-05-20), making it one of the most prominent non-US nodes in the list.
What does the disclosure pattern look like across amounts (disclosed vs. undisclosed) in this table?
A sizable portion of entries show “undisclosed” amounts, including Astro Mechanica (2025-08-20), Procureship (2025-06-11), DART (2025-02-13), and Qedma (2025-01-22). Among disclosed rounds, amounts range from Quantum Space’s $60K (2025-02-19) up to CDB Aviation’s $700M (2025-05-20).
Do the biggest rounds cluster in specific geographies, or are large deals spread out?
The largest disclosed deal (CDB Aviation, $700M on 2025-05-20) is in Dublin, Ireland, while other top disclosed rounds are outside the US-Europe core split: Climeworks is based in Zürich ($162M on 2025-07-02) and Vertical Aerospace is listed in Bristol, Virginia ($60M on 2025-07-09). That suggests prominence is geography-specific at the top end rather than a single-city concentration.
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