Funded Startups in Los Altos
Disclosed round sizes in Los Altos show one dominant outlier: Alto Neuroscience raised $120M on 2026-03-16, dwarfing the next-largest disclosed rounds in t…
Disclosed round sizes in Los Altos show one dominant outlier: Alto Neuroscience raised $120M on 2026-03-16, dwarfing the next-largest disclosed rounds in this view (AltruBio at $225M on 2024-05-21 is even larger, while most other disclosed entries cluster between $7M and $50M, e.g., Astrocade AI at $56M on 2026-05-05 and Contrast Security at $150M on 2021-11-09). The list also has a strong temporal clustering: multiple large ticket rounds land in a narrow window in 2026, including xCures ($46M on 2026-06-24) and Astrocade AI ($56M on 2026-05-05) alongside several other disclosed deals ($28M Antaris on 2026-03-31; $120M Alto Neuroscience on 2026-03-16).
Sector and stage signals are mixed but concentrated: 22 of 50 entries are labeled “Artificial Intelligence (AI)” and 9 of 50 carry “Series Unknown” or a blank series classification, while “undisclosed” amounts appear in 4 rows (e.g., Prezent AI on 2026-04-30; Spot AI on 2025-12-17; Artera on 2023-11-09; Evommune on 2023-04-26 is disclosed at $50M but this entry shows the “undisclosed” pattern elsewhere). Rounds span from 2021-08-02 (Avaamo, $7M) through 2026-06-24 (xCures, $46M), based on the 50 most recent rows shown.
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Frequently asked
Which disclosed round is the largest in the Los Altos list, and how separated is it from the rest of the disclosed amounts?
AltruBio’s $225M round on 2024-05-21 is the largest disclosed amount in the 50-row view. The next-largest disclosed entries are substantially lower, including Alto Neuroscience’s $120M (2026-03-16) and Contrast Security’s $150M (2021-11-09), while many other disclosed rounds sit in lower bands such as $20M–$56M.
How concentrated are rounds over time in this view—do the most recent months contain multiple deals?
Yes. Several entries cluster in 2026, including xCures ($46M, 2026-06-24), Astrocade AI ($56M, 2026-05-05), Antaris ($28M, 2026-03-31), and Alto Neuroscience ($120M, 2026-03-16), all within roughly a 3.5-month span. Earlier years also show bursts, such as 2021-09-14 having two $35M–$80M AI rounds (Deep Vision and VERSATILE).
Are any sectors over-represented compared with the rest of the companies shown?
Artificial Intelligence (AI) is over-represented: 22 of 50 rows are AI. The next most frequent labeled area is much smaller by comparison, with other categories appearing only a handful of times in this 50-row slice (e.g., Biotechnology appears repeatedly but far less than AI, such as AltruBio at $225M on 2024-05-21 and Evress Analytics at $7M on 2026-04-23 is IT, not biotech).
What stage classifications dominate, and how common are “Series Unknown” or missing series labels?
“Series Unknown” (including blank/unspecified series labels) appears in 9 of 50 entries, including Prezent AI on 2026-04-30 and AltruBio’s label at “Series B” is specified, while the unknown-series group includes items like RenovoRx on 2026-03-18 ($10M) and GEODNET on 2025-02-26 ($8M). Explicit named stages like Seed, Series A, Series B, and higher letters do show up frequently, but the unknown-label share is large enough to affect any stage-based interpretation.
Are there notable outliers on the low end or with undisclosed amounts that could skew analysis of typical deal size?
Yes on both fronts. The smallest disclosed amount is $250K for Prósperos on 2025-05-15, while four rows list “undisclosed” amounts (e.g., Prezent AI at 2026-04-30; Spot AI at 2025-12-17; Artera at 2023-11-09; SpaceBasic Inc. at 2023-08-23). These undisclosed entries create gaps when comparing “typical” disclosed sizes, especially against large disclosed rounds like AltruBio’s $225M.
Which entries fall closest to the most recent date in this view (last ~90 days), and do they show a pattern in deal size or sector?
Relative to the most recent date shown (2026-06-24, xCures), multiple AI- and tech-adjacent rounds appear in the following ~90 days: Astrocade AI ($56M, 2026-05-05), Antaris ($28M, 2026-03-31), and Alto Neuroscience ($120M, 2026-03-16) are all within that window, along with Evress Analytics ($7M, 2026-04-23) in Information Technology. Disclosed amounts in this window range widely (from $7M to $120M), but AI is a recurring theme.
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