ASI Raises $325m at $3bn Valuation, Led by Spark

ASI, a Boston start-up that sells AI to help run air traffic control, power grids and military operations, has raised $325 million in a Series C round that values it at $3 billion. The round is led by Spark Capital, with “major participation from affiliates of Citadel Securities, Meritech Capital, Craft Ventures, Energy Impact Partners, and Andreessen Horowitz (a16z),” the company said in a release on Business Wire on 20 October.

The money is a bet on AI that manages physical systems rather than writing text. ASI says its software simulates operations hours, days and weeks ahead so the people running them can spot problems early, and it names the US aviation regulator, the US Army and three major US airlines among its customers. If that holds, a start-up’s software already sits behind systems that travellers and electricity customers rely on.

In brief

ASI has raised a $325m Series C at a $3bn valuation, led by Spark Capital, with Citadel Securities affiliates, Meritech, Craft, Energy Impact Partners and a16z also investing.
The company says its AI already supports an $875m US air traffic modernisation programme, a $99m US Army contract, three major airlines and National Grid.
ASI has not disclosed revenue, and its claims to be the fastest-growing software platform across the US Air Force and one of only four such contract winners are its own.

What ASI says its software does

Founder and chief executive Phillip Buckendorf draws a sharp line between ASI and the chatbot boom. “While the broader tech ecosystem spent hundreds of billions teaching AI to manipulate words and generate text, ASI is deeply focused on AI systems that can manage and control physical assets — no matter if that’s a plane, a vessel, or the energy grid,” he said.

In practice, the company says it runs “continuous forward simulations, multidimensional monitoring, and optimization”, balancing deterministic and probabilistic modelling. The aim, according to the release, is to move operators from reactive firefighting to planning before problems arise. ASI frames the need starkly, describing US air traffic control systems as failing and electrical grids as heavily congested.

That pitch has already won large government work, by ASI’s account. The US Department of Transportation and the Federal Aviation Administration awarded it an $875 million programme of record to modernise the National Airspace System, and the US Army recently gave it a $99 million contract tied to its Next Generation Command and Control (NGC2) programme.

Figure	What it covers
$325m	Series C round, at a $3bn valuation
$875m	DOT and FAA programme to modernise US airspace
$99m	US Army command and control contract

Source: ASI release via Business Wire, 20 October 2026.

Big claims, attributed

ASI makes several superlatives that TSN cannot check. It says it is “one of only four technology companies founded since 2000 to win a federal program of record of this magnitude”, adding: “And no company has accomplished this faster.” It also calls itself “the fastest-growing software platform across the U.S. Air Force, supporting over 4,000 operators during Operation Epic Fury.”

Its lead investor goes further. “ASI is one of just four neoprimes that have signed production contracts of this size with the U.S. government,” said Clay Fisher, a general partner at Spark Capital, a term used for newer defence contractors competing with the established prime contractors.

Beyond government, ASI says its systems orchestrate operations for Delta Air Lines, Alaska Airlines and United Airlines, and that National Grid, which supplies gas and electricity to more than 20 million people in the north-east US, has partnered with it on grid planning and operations. The release gives no contract values for these deals, and ASI has not disclosed revenue.

Where the money goes

ASI says the new capital will “accelerate deployment across energy, logistics, and tactical edge environments” and expand its AI research and engineering teams in Boston. It also has offices in Washington DC, Denver and Europe.

Energy looks like the next push. “We see energy as a major growth opportunity for the company,” said Sameer Reddy, a managing partner at Energy Impact Partners, pointing to rising electricity demand and utilities’ need to upgrade the grid while staying reliable.

The deal adds to a run of large rounds for AI firms working on the physical world. Earlier on 20 October, TSN reported that Arda, founded by OpenAI’s former research chief, had raised $230 million at a $1.5 billion valuation, according to CNBC.

Our read

This is TSN’s analysis. ASI’s valuation rests heavily on government contracts, which give it credibility but also tie its growth to federal budgets and procurement timetables. The commercial side, airlines and National Grid, is where investors will want proof of scale, and the release offers names but no numbers. The test for the next round will be whether ASI discloses revenue to match its claims.