Funded Startups in Menlo Park
Disclosed funding in this Menlo Park set is dominated by a single outlier: Mainspring Energy raised $258M on 2025-04-14, dwarfed by the next-largest disclo…
Disclosed funding in this Menlo Park set is dominated by a single outlier: Mainspring Energy raised $258M on 2025-04-14, dwarfed by the next-largest disclosed rounds (Together AI at $305M on 2025-02-20 is actually the top disclosed at $305M; Antheia at $56M on 2025-06-03 and BillionToOne at $130M on 2024-06-21 sit well below). The remaining disclosed rounds cluster mostly in the single-digit millions and low tens, with multiple $10M–$22M financings such as Shipday ($7M on 2025-11-20) and Quantifind ($22M on 2025-01-17), plus several undisclosed rounds that prevent full size ranking.
Timing is also concentrated: the newest entry is vijil on 2025-11-27, while the oldest row shown is Adverum Biotechnologies on 2024-02-05, spanning roughly 20 months. Sector-wise, AI appears repeatedly across the list (e.g., vijil on 2025-11-27, Develop Health on 2025-08-20, and Redcoat AI on 2024-03-14), and the stage labels skew mixed, with 13 entries marked “Series Unknown” or 17 marked “undisclosed” amounts when the amount field is “undisclosed,” affecting how confidently analysts can compare across rounds.
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Frequently asked
Which disclosed round is the clear size outlier in the Menlo Park list, and how does it compare to other disclosed amounts?
The largest disclosed amount is Together AI at $305M (2025-02-20); it sits well above the next tier of disclosed rounds such as Mainspring Energy’s $258M (2025-04-14) and BillionToOne’s $130M (2024-06-21). After that, the disclosed amounts more often fall into the low tens (for example, Collate at $10M on 2025-07-15 and Viaduct at $10M on 2024-06-04).
Do the rounds cluster into a narrow time window, or are they spread evenly across the 50 entries?
They’re spread over a broad date range: 2024-02-05 (Adverum Biotechnologies) through 2025-11-27 (vijil). Within that span, several entries land in tight bursts, such as 2025-07-07 (PAX Markets undisclosed, Synfini $9M) and 2024-03-21 (Espresso Systems $28M and LeakSignal $2M), indicating localized clustering even though the full window is ~20 months.
Are any sectors over-represented relative to others in these 50 rows?
Artificial Intelligence is the most recurring theme across the list (e.g., vijil on 2025-11-27, Shipday on 2025-11-20, Develop Health on 2025-08-20, and Redcoat AI on 2024-03-14). Healthcare-related categories also appear frequently (Honey Health $8M on 2025-11-01, Antheia $56M on 2025-06-03, and Tivic Health $4M on 2024-05-09), but AI is the most consistently repeated across multiple different product directions.
How should analysts treat comparisons when stage is “Series Unknown” or amounts are “undisclosed”?
There are 13 entries labeled “Series Unknown” (for example, ALICE Technologies on 2025-11-16 and Deepcell on 2025-04-24), and there are 17 rows with the amount field marked “undisclosed” (for example, ALICE Technologies on 2025-11-16 and Jupiter Endovascular on 2025-10-12). This mixture means size-based ranking is incomplete for many rows, and any “largest” or “smallest” comparisons should focus strictly on disclosed amounts.
What are the smallest disclosed financings in the list, and are they concentrated in a particular stage?
The smallest disclosed amounts shown are $200K (Superinsight on 2024-04-22, Pre-Seed) and $2M (LeakSignal on 2024-03-21). These low disclosed amounts occur in different stages (Pre-Seed for Superinsight versus unlabeled stage for LeakSignal), suggesting that very small rounds are present but not confined to one specific stage label.
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