Funded Energy Startups in Boulder
Among the 14 Boulder-area energy startups shown, the largest disclosed round is Electra’s $186M Series B on 2025-04-24.
Among the 14 Boulder-area energy startups shown, the largest disclosed round is Electra’s $186M Series B on 2025-04-24. That figure dwarfs the next-largest disclosed amount—LongPath Technologies at $162M (2024-10-22)—and sits far above the next tier (e.g., Wunder at $48M on 2022-05-04; Optera at $12M on 2023-09-11; Odyssey Energy Solutions at $15M on 2023-05-19).
The entries also cluster temporally: 5 of 14 rounds with disclosed amounts fall between 2024-10-22 and 2025-04-24 (LongPath Technologies in Oct 2024; Radiant Labs in Jun 2024; Electra in Apr 2025; and two “Series Unknown” entries in Feb–Mar 2025 including SMT Energy at $135M on 2025-02-27 and Peregrine Energy at $115M on 2025-03-17). Stage disclosure is split, with 5 of 14 rows labeled “Series Unknown” and 2 of 14 rows marked “undisclosed,” while only a minority specify named stages (e.g., Seed: Elephant Energy at $2M on 2024-04-11; Series A: Optera at $12M on 2023-09-11 and Odyssey Energy Solutions at $15M on 2023-05-19; Series B: Electra at $186M). Rounds span 2021-06-16 (ElectraSteel) through the latest 2025-04-24 (Electra).
Most recent rounds
14 shownRelated listings
Frequently asked
What stands out in deal size for these Boulder energy rounds, and how concentrated is it at the top?
Electra’s $186M on 2025-04-24 (Series B) is the clear size outlier in the disclosed set, with LongPath Technologies’ $162M on 2024-10-22 the only other disclosed round in the same upper range. After that, the disclosed amounts drop notably—for example, Wunder at $48M (2022-05-04) and Odyssey Energy Solutions at $15M (2023-05-19).
Do the most recent closings cluster into a tight time window in this list?
Yes. From 2024-10-22 through 2025-04-24, 4 disclosed rounds appear in the 2024 Q4 to 2025 Q2 span: LongPath Technologies ($162M, 2024-10-22), SMT Energy ($135M, 2025-02-27), Peregrine Energy ($115M, 2025-03-17), and Electra ($186M, 2025-04-24), with additional entries in early 2025 including Bolder Industries on 2025-02-10 (undisclosed).
How often are stage labels missing or not disclosed, and what does that imply for comparability?
Stage information is frequently non-specific: 5 of 14 rows are labeled “Series Unknown,” and 2 of 14 rows are “undisclosed.” This is especially important for comparisons because some large disclosed rounds (e.g., Electra at $186M is labeled Series B, but LongPath Technologies at $162M is “Series Unknown”) cannot be grouped consistently by stage.
Which stage types dominate when stages are actually specified?
Named stages concentrate into a few buckets: “Series A” appears for Optera ($12M, 2023-09-11) and Odyssey Energy Solutions ($15M, 2023-05-19), “Seed” appears for Elephant Energy ($2M, 2024-04-11), and “Series B” appears for Electra ($186M, 2025-04-24). The rest are either “Series Unknown,” “Venture - Series Unknown” (Wunder, $48M on 2022-05-04), or unlabeled (ElectraSteel on 2021-06-16).
Are there unusually small or oddly labeled rounds compared with the rest of the disclosed amounts?
Radiant Labs is an extreme small outlier among disclosed rounds at $80K on 2024-06-05, compared with multiple other disclosed rounds above $2M (e.g., Elephant Energy’s $2M on 2024-04-11 and Tynt Technologies’ $2M on 2022-04-01). The dataset also includes multiple non-disclosed amounts (Bolder Industries on 2025-02-10; Rolling Energy Resources on 2023-03-07; ION Clean Energy on 2023-03-02), which limits size comparisons for those specific entries.
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