Series Unknown Funded Hardware Startups
Across these 50 “Series Unknown” hardware rounds, the largest disclosed amount is Princeton Digital Group’s $1.3B (2025-07-17), which dwarfs every other di…
Across these 50 “Series Unknown” hardware rounds, the largest disclosed amount is Princeton Digital Group’s $1.3B (2025-07-17), which dwarfs every other disclosed round shown here (the next-largest disclosed amounts include Vultr at $329M on 2025-06-23 and SiTime at $350M on 2025-06-26). At the small end, the smallest disclosed amount is Cartwheel Robotics’ $150K (2025-06-13), while “undisclosed” appears 8 times in the rows (e.g., AccessPlus Communications on 2025-08-13 and Synapticon on 2025-07-15).
The funding dates cluster tightly: the rows shown span 2025-05-21 through 2025-08-25, with multiple entries in late June and late July (e.g., SiTime $350M on 2025-06-26; Kardium $249M on 2025-07-02; Sequans Communications $195M on 2025-06-23; Wessex Internet $68M on 2025-06-24). Geographically, the list is distributed, but there are clear multi-day concentrations in North America and Europe—while the outlier scale is largely independent of geography (e.g., $69M Oxide Computer Company in Emeryville on 2025-07-16 alongside $6M OPē Technologies in Mobile on 2025-08-25).
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Frequently asked
What’s the largest disclosed round in this “Series Unknown” hardware set, and how far ahead is it of the rest?
Princeton Digital Group raised $1.3B on 2025-07-17, which is far above the next-largest disclosed rounds shown (SiTime $350M on 2025-06-26 and Vultr $329M on 2025-06-23). This makes the top disclosed entry a clear outlier by scale versus all other disclosed amounts in the table.
Do the rounds cluster in a specific time window within the 50-row view?
Yes. Dates run from 2025-05-21 (Cajo Technologies) to 2025-08-25 (OPē Technologies), with noticeable stacking in mid-to-late June and late July (for example, multiple June 23–26 entries such as Vultr $329M on 2025-06-23, Sequans Communications $195M on 2025-06-23, and SiTime $350M on 2025-06-26).
Which entries are most “outlier-like” on the low end versus the high end?
The low disclosed floor is Cartwheel Robotics at $150K on 2025-06-13, while the high end is Princeton Digital Group at $1.3B on 2025-07-17. Between them, the large disclosed concentration includes SiTime $350M (2025-06-26) and Kardium $249M (2025-07-02), indicating a wide dispersion rather than one tight band of round sizes.
How often are amounts not disclosed, and does that affect which rounds appear dominant?
“Undisclosed” appears 8 times in the rows (e.g., AccessPlus Communications on 2025-08-13; Enate on 2025-06-25; Kigen on 2025-06-10). Because the largest comparisons can only use disclosed figures, the apparent dominance of Princeton Digital Group’s $1.3B on 2025-07-17 is based on disclosed amounts alone, with several same-period entries excluded from size-based ranking due to undisclosed labels.
Are there any geographic concentration patterns, or is the list broadly distributed?
The list is broadly distributed across North America, Europe, and Canada, but large-scale rounds appear in multiple regions rather than a single city. For instance, top-end disclosed amounts include Princeton Digital Group in Singapore at $1.3B (2025-07-17) and Oxide Computer Company in Emeryville at $69M (2025-07-16), alongside sizable UK and Europe entries like Wessex Internet in Blandford Forum at $68M (2025-06-24).
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