Infinite Capital is a West Palm Beach, Florida-based venture capital firm. Value Add VC tracks 2 companies Infinite Capital has invested in and 2 venture rounds it took part in (0 as lead).
Infinite Capital key facts (as of )
| Fact | Value | Source |
|---|---|---|
| Headquarters | West Palm Beach, Florida, USA | SEC Form ADV (IAPD), October 18, 2026 |
| Type | Venture capital firm | Value Add VC classification |
| Notable investments | Mach Industries | infinite.xyz, October 24, 2026 |
| Venture rounds tracked | 2 (led 0, joined 2) 2 in the last 12 months | Recent deals table on this page (each round cites its source) |
| Portfolio companies tracked | 2 | Portfolio list on this page |
Infinite Capital overview
Infinite Capital is a venture firm that backs founders working on deep-tech shifts in aerospace, autonomy, defense, energy and AI, alongside an earlier crypto portfolio.[1] It is led by founder and managing partner Nathan Doctor and partner Sean Doctor.[2] Portfolio company Talyn was acquired by Ampaire.[3]
Recent deals we track
2Track record: led 0 and participated in 2 of 2 tracked venture rounds · 2 in the last 12 months
| Date | Company | Event | Role | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|---|---|
| Oct 21, 2026 | Peak Energy | Series B | Participated | $108M | — | Maverick SiliconunverifiedInfinite CapitalunverifiedEclipse VenturesunverifiedXoraunverifiedLG Technology VenturesunverifiedGeneral Motors Ventures | PR Newswire |
| Sep 10, 2026 | Mach Industries | Series C extension | Participated | $600M | $3.7B | TechCrunch |
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Notable Infinite Capital investments
1- Mach Industries (infinite.xyz, October 24, 2026)
At a glance
Infinite Capital appears in 2 funding rounds tracked by ValueAddVC since 2026. Its most recent tracked deal was Peak Energy's $108M Series B round (Oct 21, 2026).
Infinite Capital profile
written 2026-10-24Infinite Capital backs deep-tech founders in aerospace, defense, energy and AI; it led Mach Industries' 2026 Series C and has disclosed no fund size.
What Infinite Capital does
Infinite Capital is a venture firm that backs founders working on deep-technology shifts in aerospace, autonomy, defense, energy and AI. Its website describes the firm as conviction capital focused on structural change, and the portfolio page also lists an earlier crypto portfolio.[1],[2]
Infinite Capital says it is stage agnostic and invests at inflection points, the stage where a company breaks out with fast execution, rapid adoption and commercialization. Infinite Capital invests from early concept to growth stage, with checks up to $50M.[1]
Infinite Capital says it gets hands on with its companies at early stage and at scale, helping with strategy, token models, capital raises, hiring, product releases and scaling production. The firm also runs Infinite Labs, which its website calls the applied design and product arm of Infinite Capital.[1]
History
Infinite Capital does not state a founding year or total assets under management on the pages we read. The firm's website says its thesis work led it to Tesla in 2013 and Ethereum in 2014, and that it has since widened its focus to aerospace, autonomy, advanced computing, energy, hardware and AI.[1]
Infinite Capital's portfolio page marks Tesla, Bitcoin and Ethereum with an asterisk and states that these are personal investments of the partners, not investments by funds managed by Infinite Capital. They are not counted as fund holdings in this profile.[2]
Infinite Capital's website says its team has built and sold companies, without naming them. The portfolio page lists dated investments from 2017, when it shows MakerDAO as an ICO, through mid-2026.[1],[2]
Funds
Infinite Capital LP - Series Mach Industries, a Delaware pooled venture capital fund, filed an amended Form D with the SEC. The filing lists Infinite I LLC as general partner and a West Palm Beach, Florida business address.[3]
The Form D for Infinite Capital LP - Series Mach Industries lists a total offering amount of $100,000,000 USD and $45,420,035 USD sold.[3]
Infinite Capital LP - Series Mach Industries is named for a single portfolio company, which suggests a special-purpose vehicle, but the filing does not say what it invested in, and it does not tie the vehicle to the Series C. The offering figure is a target stated in the filing, not a confirmed fund size.[3]
Infinite Capital has not disclosed a flagship fund size, a fund vintage or a return record in the sources we read.[1],[3]
People
Infinite Capital's team page lists Nathan Doctor as founder and managing partner and Sean Doctor as partner. Jack Williams and TJ Pratt are listed as principals, Daniel Dang as CFO and Jim Thompson as product lead.[4]
Infinite Capital's team page gives no biographies or prior employers for any of these six people, and the sources we read do not state how Nathan Doctor and Sean Doctor are related, if at all.[4]
Portfolio and notable investments
Infinite Capital led the Series C of Mach Industries, a defense manufacturer developing autonomous systems for the U.S. military and its allies, according to the firm's portfolio page, which dates the investment to May 2026. The portfolio page also marks Mach Industries as a lead investment.[2],[5]
In September 2026, Mach Industries announced a $600 million continuation of its Series C financing.[5]
The continuation values Mach Industries at $3.7 billion, and the company named Infinite Capital among its continuing investors alongside Ribbit Capital, Bedrock Capital and Sequoia.[5]
Infinite Capital's homepage summary says the September round followed a $300 million Series C at a $1.8 billion valuation earlier in 2026.[1]
Infinite Capital's portfolio page lists H3X, where it led a Series A in 2024 after a 2021 seed round, and Skyryse, where it led a Series A+ in December 2021. It also lists Valar Atomics (Series A, September 2025), Hubble Network (Series B, August 2025), Apptronik (Series A, February 2025), Peak Energy (Series B, July 2026) and Ultra (seed, November 2025).[2]
Infinite Capital's homepage news feed summarizes a $108 million raise by Peak Energy, led by GM Ventures, that combines a Series B financing and venture debt.[1]
Infinite Capital's homepage news feed also summarizes a $200 million round for Hubble Network at a $1.6 billion valuation. The summary does not say whether Infinite Capital took part in that round.[1]
Infinite Capital's earlier-stage entries include Zeno Power Systems, Radical AI, Extropic, Karman, Inversion Space, VATN, Albedo and Greywing. Its crypto portfolio lists Akash Network, Ocean Protocol, MakerDAO and a Hyperliquid airdrop.[2]
Exits
Infinite Capital's portfolio page marks Talyn, a 2021 seed investment in aerospace, as acquired by Ampaire. The page gives no acquisition date, price or Infinite Capital proceeds, and no other exits are marked on it.[2]
Strategy
Recent changes
- Oct 21, 2026Oct 21, 2026Invested in Peak Energy (Series B, $108M) PR Newswire
- Sep 10, 2026Sep 10, 2026Invested in Mach Industries (Series C extension, $600M) TechCrunch
Portfolio
2 totalSector / Stage Activity
Co-Investors
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Latest Pulse
- Oct 28, 2026Firehawk Defense Hits $1.4B Valuation On $150M Series DFirehawk Defense, the Addison, Texas rocket-propellant maker, closed a $150M+ Series D at a $1.4B+ valuation led by Advent International and Rochefort Asset Management, reaching unicorn status.→
- Oct 21, 2026Peak Energy Raises $108M Series B | $1B+ In Customer OrdersPeak Energy raised an oversubscribed $108 million Series B led by General Motors Ventures to scale its sodium-ion grid battery factory, with the Burlingame, California startup citing more than $1 billion in existing customer orders.→
- Sep 10, 2026Mach Industries Doubles Valuation To $3.7BDefense-tech drone maker Mach Industries raised an additional $600 million, doubling its valuation to $3.7 billion just three months after its original Series C, an eightfold jump in a little over a year.→
- Jul 13, 2026Defense Tech's $14.6B Pace Shows No Sign of SlowingDefense tech startups raised $14.6 billion in the first five months of 2026 alone, already blowing past the previous full-year record of $9.6 billion set in 2025, led by Anduril, Shield AI and Saronic.→
- Jun 21, 2026Defense-Tech Wunderkind Mach Industries Bets It Can Build the Whole Arsenal at OnceTechCrunch profiles 22-year-old Ethan Thornton, whose defense startup Mach Industries -- fresh off a $300M Series C at a $1.8B valuation -- is pursuing an unusually sprawling product line, from hydrogen-powered weapons to a flexible 'Forge' manufacturing network. The story crystallizes a defense-tech moment where young founders raise mega-rounds to challenge primes across many fronts simultaneously.→
Infinite Capital FAQ
What stage does Infinite Capital invest at?
In the rounds Value Add VC tracks, Infinite Capital's deals were most often Series B (1) and Series C extension (1).
What companies has Infinite Capital backed?
Notable Infinite Capital investments include Mach Industries, according to infinite.xyz. Companies Value Add VC tracks as Infinite Capital investments include Peak Energy and Mach Industries.
Where is Infinite Capital based?
Infinite Capital is headquartered in West Palm Beach, Florida, USA, according to SEC Form ADV (IAPD).
Who does Infinite Capital co-invest with most?
In the rounds Value Add tracks, Infinite Capital most often invests alongside Bedrock Capital (1 shared deal), Eclipse Ventures (1 shared deal), Greycroft (1 shared deal), Khosla Ventures (1 shared deal), Maverick Silicon (1 shared deal).
References
researched 2026-10-24Sources & methodologyshow
- PR Newswireprimary source1 fact
- TechCrunchmajor outlet1 fact
- infinite.xyzValue Add VC data1 fact
Figures are labelled Reported (a source states it), Estimated, Derived (computed from other facts) or Rumored (in talks / unconfirmed). Rumors never replace a confirmed figure. Each figure keeps its own as-of date; history is preserved rather than overwritten.