Funded Science and Engineering Startups in United States
In the 50 most recent science and engineering rounds shown, the largest disclosed amount is PureCycle Technologies at $250M (2026-06-11).
In the 50 most recent science and engineering rounds shown, the largest disclosed amount is PureCycle Technologies at $250M (2026-06-11). That single round dwarfs the rest of the disclosed amounts: the next-largest disclosed is Starfish Space at $112M (2026-04-07), while many other disclosed rounds cluster well below $40M (for example $35M–$32M: Sky Harbour $32M on 2024-09-17; Syzygy-like entries are undisclosed; and CisLunar Industries $3M on 2026-03-23). On concentration patterns, the funding dates stack heavily in 2024–2025 with multiple sub-$10M seed/pre-seed rounds, and the list is not dominated by one city: Los Angeles appears repeatedly (e.g., Mote $7M on 2025-03-04; Active Membranes $2M on 2024-07-09; Inversion Space $44M on 2024-11-20), alongside major one-offs such as San Francisco’s Electra.aero $115M (2025-04-21) and New York’s Recycle Track Systems $40M (2025-01-24). Stage reporting is also mixed: 17 of 50 rows are “Series Unknown,” and 9 of 50 rows list “undisclosed” amounts, creating comparability gaps when looking at deal size.
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Frequently asked
What’s the largest disclosed round in these science/engineering entries, and is it an outlier versus the rest of disclosed deals?
PureCycle Technologies’ $250M on 2026-06-11 is the clear size outlier. The next-largest disclosed round is Starfish Space at $112M on 2026-04-07, and most other disclosed amounts in the table sit far below $100M (e.g., DPF Resolutions $770K on 2026-05-14; Air Space Intelligence $350K on 2025-08-15).
Do the most recent rounds cluster into a tight date window, or are they spread out?
They are concentrated near the top of the list: multiple rounds occur in June 2026 (Momentus $25M on 2026-06-12; PureCycle Technologies $250M on 2026-06-11; Syzygy Plasmonics is undisclosed on 2026-06-18). But the overall set spans much longer, from the oldest row Kayhan Space at $7M on 2023-09-19 through the most recent date Syzygy Plasmonics on 2026-06-18.
Which stage labels dominate, and how much of the dataset is missing comparable stage/amount information?
“Series Unknown” appears in 17 of 50 rows, including Momentus (2026-06-12, $25M) and Starfighters Space (2026-05-22, $18M). For disclosed sizing, 9 of 50 rows show “undisclosed” amounts (e.g., Syzygy Plasmonics on 2026-06-18; ChopAir on 2026-04-08; SeaTrac Systems on 2026-04-07), so deal-size comparisons should treat those entries separately.
Are any cities over-represented in this list of funded science and engineering companies?
Los Angeles is the most visible multi-appearance geography: Mote ($7M on 2025-03-04), Inversion Space ($44M on 2024-11-20), Active Membranes ($2M on 2024-07-09), and Astro Mechanica is also listed in San Francisco rather than LA. By contrast, major one-off city anchors include New York’s Recycle Track Systems ($40M on 2025-01-24) and Washington, DC’s Electra.aero ($115M on 2025-04-21).
Which stage outcomes show up in the largest disclosed deals (seed/Series A/Series B/other), and where do the big rounds sit?
Among the biggest disclosed amounts, the list spans multiple stage labels: PureCycle Technologies is “Series Unknown” at $250M (2026-06-11), Starfish Space is Series B at $112M (2026-04-07), and Electra.aero is Series B at $115M (2025-04-21). Seed-stage disclosed amounts appear but are generally smaller in this slice (e.g., CisLunar Industries $3M on 2026-03-23; Reditus Space $7M on 2025-12-01; Kayhan Space $7M on 2023-09-19).
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