VC Deal Flow — Week of June 22-28, 2026
This week's top-tier VC scan finds roughly $1.25B in disclosed rounds, led by Stark Defence's Sequoia/Founders Fund raise and a dense cluster of a16z, Sequoia, and YC-backed AI infrastructure and vertical AI deals.
Coverage window: June 22-28, 2026. This issue includes public announcements where a16z, Sequoia, Y Combinator, or Founders Fund were explicitly named as investors. Valuations are included only when the source disclosed them.
What moved this week
The tracked funds showed up in 11 confirmed financing announcements, with roughly $1.25 billion of disclosed round value. The week split into two clear lanes: very large infrastructure/defense checks, and a dense set of vertical AI application rounds.
- Largest round: Stark Defence raised €500 million, led by Sequoia and Founders Fund, at a €3.2 billion valuation. 1
- a16z's busiest lane: AI infrastructure and vertical AI, including Mirendil, Netris, Ornn, Prosper AI, and Probook. 23456
- Sequoia's week: Stark, Probook, Sail Research, and Engram all named Sequoia in the financing. 789
- YC appeared mainly as a participant, not lead: Taktile, Warp, and JustAI all included YC in syndicates led by other investors. 101112
- Exits: No IPO, acquisition, or public-market debut tied to the four tracked investors passed the confirmation bar this week.
Deal table
| Sector | Company | Round | Tracked investor signal | Company one-liner | Valuation |
|---|---|---|---|---|---|
| Defense / robotics | Stark Defence | €500M growth round | Sequoia and Founders Fund led; NATO Innovation Fund and others participated | Berlin-based defense startup building kamikaze drones and scaling European manufacturing capacity | €3.2B 1 |
| AI R&D infrastructure | Mirendil | $200M seed | a16z led; Kleiner Perkins, Nvidia, and others participated | Platform for automating parts of AI research and helping scientists run model work | $1B 13 |
| AI memory / infrastructure | Engram | $98M financing | Round led by Kleiner Perkins, General Catalyst, and Sequoia, with individual AI investors | Enterprise AI memory layer intended to reduce token usage and improve real-time adaptation | $600M 9 |
| AI agent infrastructure | Sail Research | $80M seed + Series A | Sequoia led the Series A; Kleiner Perkins led the seed | Cloud platform for running long-horizon AI agents at lower inference cost | $450M 8 |
| FinTech / AI decisioning | Taktile | $110M Series C | YC participated; Goldman Sachs Alternatives led | AI decision automation platform for banks and insurers | Not disclosed 10 |
| HR / payroll AI | Warp | $60M Series B | YC participated; Battery Ventures led | AI-native payroll, HR, compliance, benefits, and IT platform for startups and mid-market companies | Not disclosed 11 |
| Home services AI | Probook | $40M total announced: $34M Series A + $6M seed | a16z led the Series A; Sequoia led the seed and joined the Series A | AI operating system for home-service operators, built around dispatch | Not disclosed 7 |
| Compute markets / crypto infra | Ornn | $33M seed | a16z crypto announced the investment; SiliconANGLE reported the round also included Galaxy Ventures and others | Marketplace and price index for buying, selling, and hedging AI compute capacity | Not disclosed 14 |
| Healthcare AI | Prosper AI | $30M Series A | a16z led | AI-native platform for specialty-clinic scheduling, insurance verification, and billing workflows | Not disclosed 6 |
| AI network automation | Netris | $15M Series A | a16z led | Network automation and multi-tenancy software for GPU clouds and large AI data centers | Not disclosed 15 |
| Marketing AI | JustAI | $17M Series A | YC participated; Base10 led, with Peak XV also in the round | Agentic marketing platform for personalization, experimentation, decisioning, and measurement | Not disclosed 12 |
Sector read-through
AI infrastructure is splitting into deeper layers
This was not another week of generic model-wrapper rounds. Mirendil is trying to automate AI research itself, Sail is lowering the runtime cost of long-horizon agents, Netris is attacking GPU-cloud networking, Ornn is financializing compute capacity, and Engram is trying to make enterprise AI remember without repeatedly burning tokens. The shared bet: AI's bottlenecks are moving from model access to the systems around model work.
The round sizes support that point. Mirendil's $200 million seed at a $1 billion valuation and Sail's $80 million at a $450 million valuation show investors underwriting infrastructure companies before the market has settled on standard architectures. 813
Defense tech delivered the week's biggest top-four check
Stark's €500 million raise was the only Founders Fund check that passed this week's public confirmation bar, and it also brought Sequoia into the same round. Bloomberg reported that the financing valued Stark at €3.2 billion and that the proceeds support European military technology manufacturing; Sifted separately reported that Stark plans to direct more than 80% of the capital into R&D and manufacturing capacity. 116
Vertical AI moved from demos to operational systems
Probook, Prosper AI, Taktile, Warp, and JustAI all sell into messy operational workflows: dispatch, clinic phone operations, financial decisions, payroll/compliance, and enterprise marketing. These are not broad productivity claims; each company is pitching workflow ownership in a specific back office. The tracked-fund signal is strongest where the software either closes the loop itself or sits on a decision point with measurable economic impact. 2610
Fund-by-fund check-in
| Fund | Confirmed public check-ins this week | Notes |
|---|---|---|
| a16z | 5 | Led or announced investments in Prosper AI, Probook, Mirendil, Netris, and Ornn. The center of gravity was AI infrastructure plus vertical AI applications. |
| Sequoia | 4 | Co-led Stark, led Probook's seed and joined the Series A, led Sail's Series A, and was named among Engram's leading investors. |
| YC | 3 | Appeared as a participant in Taktile, Warp, and JustAI; no YC-led priced round surfaced. |
| Founders Fund | 1 | Co-led Stark with Sequoia; no other newly announced Founders Fund check passed the public confirmation bar. |
Watch points for next week
- Compute financing is becoming a theme, not a one-off. Ornn, Netris, Sail, and Mirendil all sit near the capital-intensive side of AI. Follow whether more rounds move from software margins toward physical infrastructure exposure.
- Defense valuations remain fast-moving. Stark's round roughly puts European defense manufacturing in late-stage venture territory, and the next useful signal will be customer concentration: NATO member contracts versus direct Ukraine exposure.
- YC follow-on rounds are broadening beyond developer tools. Taktile, Warp, and JustAI suggest YC alumni continue to raise in regulated or operationally complex categories where AI agents can own repetitive decisions.
Exits and exclusions
No qualifying top-four exit was confirmed in this week's final source set. A few large AI and infrastructure items surfaced during discovery but were left out when the source did not clearly confirm participation from a16z, Sequoia, YC, or Founders Fund in the announced transaction, or when the announcement was product news rather than a new financing event.
References
- 1Bloomberg
bloomberg.com
- 2a16z on Probook
a16z.com
- 3a16z on Mirendil
a16z.com
- 4a16z on Netris
a16z.com
- 5a16z crypto on Ornn
a16zcrypto.com
- 6a16z on Prosper AI
a16z.com
- 7GlobeNewswire on Probook
globenewswire.com
- 8SiliconANGLE on Sail Research
siliconangle.com
- 9Calcalist on Engram
calcalistech.com
- 10Business Wire on Taktile
businesswire.com
- 11SiliconANGLE on Warp
siliconangle.com
- 12PR Newswire on JustAI via Morningstar
morningstar.com
- 13SiliconANGLE on Mirendil
siliconangle.com
- 14SiliconANGLE on Ornn
siliconangle.com
- 15TechCrunch on Netris
techcrunch.com
- 16Sifted on Stark
sifted.eu
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