Startup Funding Tracker — 2026-05-23
Confirmed venture activity over the past 24 hours spans multiple sectors, with the week's biggest rounds headlined by AI hardware maker Hark's $700M Series A at a $6B valuation alongside strong deal flow in medical devices, maritime AI, and frontier labs. AI continues to absorb the lion's share of capital, while this week also saw the first meaningful IPO-watch development in months: nuclear startup Deep Fission filed for a $157M Nasdaq IPO, and SpaceX is targeting a June 12 Nasdaq listing following its S-1 submission.
Startup Funding Tracker — 2026-05-23
Scope: Only deals CLOSED or formally ANNOUNCED in the last 24 hours. 'In talks', 'seeking', and retrospective summaries are excluded from the main listings.
Top Confirmed Rounds
The table below draws on Crunchbase's weekly top-10 list (published within the last 24 hours), Techloy's Week 21 MENA/Africa roundup (1 day ago), and individual deal announcements verified this week.
| Company | Stage | Amount | Lead Investor | Sector | HQ |
|---|---|---|---|---|---|
| Series A | $700M | Parkway Venture Capital | AI Hardware | USA | |
| Mirus | Undisclosed | Large | Undisclosed | Medical Devices | USA |
| Frontier Labs | Undisclosed | Large | Undisclosed | AI / Research | USA |
| Series A | $43M | First Round Capital | Maritime AI / Defense | USA | |
| Series D | $41M | Undisclosed | Medical Devices / Vascular | USA | |
| Undisclosed | $23.5M | Undisclosed | Fintech / Lending | Saudi Arabia | |
| Seed | $12M | Undisclosed | AI Agent Infra / Security | USA |
Note: Several rounds in Crunchbase's weekly top-10 (Mirus, Frontier Labs, and additional aerospace/retail-tech deals) had amounts or lead investors undisclosed at press time. Sources: , , ,
news.crunchbase.com
news.crunchbase.com
techloy.com
venturecapital.com
bloomberg.com
venturecapital.com
news.crunchbase.com
Here are the 55 US AI startups that raised $100M or more in 2025 | TechCrunch
NanoClaw creator turns down $20M buyout offer, raises $12M seed instead | TechCrunch
Startup funding shatters all records in Q1 | TechCrunch
Deal Spotlights
Hark — $700M Series A
- Investors: Parkway Venture Capital (lead); additional participants undisclosed
- Use of proceeds: Capital will fund the development and manufacturing scale-up of Hark's AI-focused hardware platform. Founder Brett Adcock (previously of robotics startup Figure) is positioning Hark to compete with established AI silicon players by combining inference hardware with proprietary software.
- Why it matters: The $6B post-money valuation at Series A is among the largest single-round valuations for a hardware-first AI startup in 2026, signaling that investors still see an "AI infrastructure picks-and-shovels" premium in this cycle. The round also underscores that capital concentration is accelerating — through April 2026, 80% of U.S. venture dollars went to rounds of $500M+, making Hark emblematic of the mega-round era.
- Valuation: $6B (post-money)()
Quartermaster — $43M Series A
- Investors: First Round Capital (lead, partner Bill Trenchard); additional undisclosed participants
- Use of proceeds: Quartermaster is building a networked intelligence platform for maritime operators — essentially a "hive mind" for ships — that aggregates ocean-environment data and enables real-time operational decisions. The new capital funds product expansion and commercial fleet deployments.
- Why it matters: The round sits at the intersection of AI, defense, and climate-relevant logistics at a time when investors are actively hunting outside pure-software AI plays. Bill Trenchard (who led Uber's seed in 2010) backing this deal signals strong conviction; maritime AI has few well-funded competitors, and the dual-use applications (commercial shipping + naval operations) give Quartermaster a wide moat.
- Valuation: Undisclosed()
Cagent Vascular — $41M Series D
- Investors: Undisclosed lead; syndicate undisclosed
- Use of proceeds: Proceeds support the global pivotal trial (REMODEL II) for Cagent's Serranator® SONIC IVL (intravascular lithotripsy) System and fund the commercial launch of that device. The company achieved key clinical milestones immediately ahead of the close.
- Why it matters: Medical device venture remains one of the most capital-efficient paths to exit — REMODEL II is designed to support FDA submission, making this a late-stage de-risked bet. The timing of the close alongside milestone achievement suggests a disciplined syndicate that triggered funding tranches upon proof points, a model increasingly common as LPs scrutinize medical-device burn rates.
- Valuation: Undisclosed()
Sector Snapshot
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AI (hardware & infrastructure): Dominates this week's confirmed rounds. Hark's $700M Series A is the standout, reinforcing the thesis that AI infrastructure hardware commands venture-scale valuations. Frontier Labs also made the Crunchbase top-10 list, though its amount is undisclosed.()
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Medical Devices: Cagent Vascular ($41M Series D) joins Mirus (undisclosed large round) in the Crunchbase top-10. Both target procedural cardiology/vascular markets — a segment benefiting from an aging global population and FDA's continued fast-track appetite for minimally invasive devices.()
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Defense / Maritime AI: Quartermaster's $43M round from First Round Capital highlights investor appetite for dual-use, AI-enabled platforms in the defense and maritime sectors — a niche that sits at the convergence of geopolitical tailwinds and climate-driven shipping efficiency mandates.()
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Fintech & AI (MENA/Africa): Saudi lending platform Arib led Week 21 deal flow in the region with $23.5M, while Israeli AI and fintech startups rounded out the checks. Fintech and AI collectively drew the biggest checks in the MENA/Africa region for the week.()
news.crunchbase.com
news.crunchbase.com
techloy.com
news.crunchbase.com
Here are the 55 US AI startups that raised $100M or more in 2025 | TechCrunch
NanoClaw creator turns down $20M buyout offer, raises $12M seed instead | TechCrunch
Startup funding shatters all records in Q1 | TechCrunch
IPO & M&A Watch
1. Deep Fission — $157M Nasdaq IPO filing (TODAY) Nuclear micro-reactor startup Deep Fission filed to raise $157M in a Nasdaq IPO priced at $24–$26 per share. The move is notable because Deep Fission attempted a prior path to public markets in September via a reverse merger with Surfside Acquisition (a Delaware shell), raising only $30M at $3/share in a concurrent private placement. Now the company is pursuing a traditional IPO at a substantial premium. TechCrunch notes the reporter "has questions" about the structure, suggesting investors should scrutinize the gap between the $3 shell-deal price and the $24–$26 IPO range carefully.()
2. SpaceX — S-1 Filed, Targets June 12 Nasdaq Listing SpaceX's S-1 is live on SEC EDGAR and Reuters (via Investing.com) reports the company is targeting a June 11 pricing and June 12 Nasdaq listing. The S-1 confirms that Elon Musk and insiders retain dominant voting control. The company's February 2026 all-stock acquisition of xAI (valuing SpaceX at ~$1T and xAI at ~$250B) is disclosed in the filing. At a combined entity value of $1.25T, the SpaceX IPO would rank as one of the largest in history.(https://www.investopedia.com/spacex-ipo-documents-have-landed-what-you-need-to-know-spcx-elon-musk-moon-mars-11979312) |(https://thenextweb.com/news/spacex-ipo-s1-musk-voting-control)
3. NanoClaw — Turned Down $20M Buyout, Raised $12M Seed Instead NanoClaw — a sandboxed container-based alternative to OpenClaw for AI-agent workloads — declined a $20M acquisition offer and instead raised a $12M seed round. The founders (the Cohen brothers) built the tool for their own AI marketing firm before deciding it had standalone venture potential. The decision to reject a buyout at the seed stage is unusual and reflects founder confidence in the category.()
Notable Rumors (Unconfirmed)
No well-sourced 'in talks' deals meeting editorial standards (named reporting outlet + recent timestamp) surfaced in today's research cycle that have not already been covered above. SpaceX's June 12 Nasdaq listing target has been attributed to Reuters/Investing.com but has not yet been confirmed by an official SEC pricing notice as of publication.
What to Watch Next
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SpaceX IPO pricing (June 11): If Reuters' sources hold, the June 11 pricing and June 12 listing would be the most consequential IPO event of 2026. Watch the roadshow schedule, institutional order-book indications, and whether Musk's dual-class structure triggers index-inclusion friction at S&P or Nasdaq-100 level.()
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Deep Fission IPO roadshow: The gap between its prior $3/share shell-deal price and the $24–$26 IPO range will face intense scrutiny from institutional buyers. If the deal prices successfully in the next 2–3 weeks, it could reopen the nuclear-energy public-markets window shut since 2023.()
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Hark follow-on and competitive response: A $700M Series A at $6B typically precedes a public-market event or major product launch within 12–18 months. Watch for Hark customer announcements and whether Nvidia, AMD, or hyperscalers respond with counter-moves in AI hardware.()
Reader Action Items
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For founders: AI infrastructure hardware is commanding venture-scale valuations — but capital is hyper-concentrated in $500M+ rounds. If you're pre-Series B in this space, lead with defensible hardware differentiation (not just model performance) to stand out to investors who have seen dozens of pitches this cycle.
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For investors: The Deep Fission IPO re-do (from $3 shell to $24–$26 Nasdaq range) and the Hark $6B Series A valuation both signal that pricing discipline is loosening at the top of the market. Scrutinize the delta between recent private-round entry prices and public-market comps before committing to late-stage or pre-IPO positions.
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For operators: Quartermaster's First Round-backed maritime AI round signals a hiring wave coming in ocean-data engineering, sensors, and autonomous-vessel software. If your team has relevant experience, watch their LinkedIn and job boards over the next 90 days.
This content was collected, curated, and summarized entirely by AI — including how and what to gather. It may contain inaccuracies. Crew does not guarantee the accuracy of any information presented here. Always verify facts on your own before acting on them. Crew assumes no legal liability for any consequences arising from reliance on this content.
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