VC Deal Flow: Week of August 3–9, 2026 — Seven tracked-firm rounds totaling $4.55B

From August 3–9, I could confirm seven fresh company financings involving a16z, Sequoia, Y Combinator, or Founders Fund in the cited sources. Their disclosed round amounts add up to $4.55 billion. That is the total for this confirmed set, not a market-wide weekly total. 12345678

The pattern is unusually physical. Five of the seven rounds fund power generation, batteries, mining, AI compute, or automated factories. Sequoia put its largest new check into nuclear power; a16z appeared across energy storage, minerals, compute, and defense manufacturing; YC's two appearances were application-layer software and live commerce. 12346

Round: $1 billion Series B at a reported $6 billion valuation. Sequoia led, with partner Shaun Maguire joining the board. The named participants were Apandion Capital, Atreides Management, Conviction, Dream Ventures, HOF Capital, Point72, Riot Ventures, Snowpoint Ventures, and Valor Equity Partners. A separate $200 million credit line involved Erebor; it is not included in the equity total. 1

Company: Valar is building small modular nuclear reactors: factory-built power plants intended to reduce the cost and construction time of conventional nuclear projects. The financing gives Sequoia a lead position in the week's clearest bet on deployable nuclear power. 1

Round: $1 billion Series D at a $13 billion post-money valuation. Ribbit, Addition, Valor Equity Partners, and JPMorganChase's Strategic Investment Group led. The named participants included Altimeter, D1 Capital Partners, Sands Capital, Coatue, Layer Global, Energy Impact Partners, Thrive Capital, a16z, Lightspeed, Trust Ventures, and CapitalG. 2

Company: Base installs and owns home batteries, selling backup power and grid services through a subscription model rather than charging homeowners thousands of dollars up front. It had installed more than 500 megawatt-hours of storage and was adding roughly 100 batteries a day when the round was announced. a16z is a participating investor, not a named lead. 2

Round: $310 million Series B at a $1.5 billion post-money valuation. Khosla Ventures led; a16z joined Breakthrough Energy Ventures, Greenoaks, Greycroft, Halo Fund, Pax Ventures, StepStone Group, BHP Ventures, Washington Harbour Partners, and Mitsubishi. 3

Company: Mariana is a Houston-based mining technology company. In this week's set, it is the clearest signal that climate investing is reaching the extraction and processing layer, not just generation or software. a16z participated; Khosla led. 3

Round: Series A. Crunchbase reported $300 million at a $2.4 billion valuation; a16z's own announcement, published August 4, says it co-led the round. Azora, Altimeter, and Nvidia were the other named investors in the Crunchbase account. 45

Company: Volta is building an AI neocloud that combines cloud operations with project finance to expand access to compute, especially for startups. The financing is a16z's most explicit infrastructure bet of the week: the firm is co-leading rather than appearing as an earlier portfolio backer. 4

Round: $28.5 million Series A, led by Nexus Venture Partners. Y Combinator, Zetta, Liquid 2, and angel investors Gokul Rajaram, Tim Zheng, and JD Sherman also participated. The valuation was not disclosed. 7

Company: Naïve provides infrastructure that lets AI agents automate much of the work involved in setting up and running a business. YC's role here is portfolio participation in an agentic application layer, not a disclosed lead position. 7

Round: $545 million Series G at a $20 billion valuation. Iconiq, Lightspeed, and Avra led. Kleiner Perkins, Wellington Management, a16z, Bond, DST Global, Greycroft, YC, Standard Capital, and CapitalG joined. 8

Company: Whatnot is a Los Angeles-based live-shopping platform for collectibles. The round puts both a16z and YC on the cap table of a late-stage consumer marketplace at a $20 billion valuation; neither is named as a lead in the report. 8

Round: $1.37 billion Series D at a $7.87 billion valuation, led by WCM Investment Management, Washington Harbour Partners, Valor Equity Partners, 137 Ventures, and Baillie Gifford. TechCrunch named 1789 Capital, Morgan Stanley Wealth Management, funds managed by Apollo and T. Rowe Price, CapitalG, Andreessen Horowitz, Founders Fund, Lux Capital, and Altimeter as participating investors. The report ends with "and others," so this is the named list, not an exhaustive participant list. 6

Company: Hadrian builds automated manufacturing facilities that mass-produce parts for defense vehicles, including submarines. The current round is a fresh participation signal for both a16z and Founders Fund; Founders Fund and Lux had led Hadrian's earlier $260 million Series C. 6

Reuters reported on August 5 that the first post-IPO lockup expiry would make as many as 912 million SpaceX shares eligible for sale. Founders Fund was among the company's early backers. This is a potential liquidity event, not a completed sale or a new investment, so it is not counted in the $4.55 billion total or the exit section. 10

Klaviyo agreed to acquire Agency, a three-year-old AI-powered customer-success startup, on August 5. The terms were not disclosed. Agency had previously raised $32 million from investors including Sequoia, Menlo Ventures, and Felicis; its 25-person team is joining Klaviyo, with founder Elias Torres becoming chief product officer. This is the week's confirmed Sequoia-linked portfolio exit, structured as an acquisition rather than an IPO. 11

These rounds were announced in the same window but did not name a16z, Sequoia, YC, or Founders Fund.

1. The hard-asset layer is where the money clustered. Valar is financing reactors; Base is deploying batteries; Mariana is targeting mining technology; Volta is financing compute capacity; Hadrian is building defense factories. Those five deals account for $3.98 billion of the $4.55 billion disclosed total. The common thread is capital intensity: these companies need equipment, power, sites, or specialized production before software revenue can scale. 12346

2. Lead positions and portfolio participation are separating more clearly. Sequoia led Valar and a16z co-led Volta. By contrast, a16z participated in Base Power, Mariana, Hadrian, and Whatnot, while YC participated in Naïve and Whatnot. That distinction matters when reading a weekly list: a named portfolio investor is evidence of exposure, not necessarily evidence of the firm's conviction or ownership share. 1234678

3. Valuations are available for six of the seven tracked-firm rounds. Valar was reported at $6 billion, Base at $13 billion, Mariana at $1.5 billion, Volta at $2.4 billion, and Whatnot at $20 billion. Naïve did not disclose a valuation; Hadrian's report gave $7.87 billion. The numbers are not comparable on a single basis across equity stages, but they show how much of this week's dollar volume was concentrated in already large companies. 1235789

This digest covers public announcements dated August 3–9, 2026. A round enters the tracked-firm set only when the cited detail page names a16z, Sequoia, Y Combinator, or Founders Fund as an investor or lead. The $4.55 billion total includes the seven disclosed equity rounds and excludes the separate SpaceX lockup signal. Agency is counted as an exit because the acquisition is explicit and the report names Sequoia as an earlier investor. The Hadrian entry lists every investor named in the cited report, which itself says "and others."