Atomic closes $18.5M round, lets the SEC do the announcing

Why it matters

Atomic's financing is roughly 6x its disclosed seed, giving Rossiter more capital to challenge planning suites whose long deployments created the opening for his AI product.

Michael Rossiter, the former Tesla supply-chain operator who co-founded Atomic with Neal Suidan, signed an SEC filing on Wednesday showing that Atomic had sold $18,510,980 in equity to 13 investors.

The offering was fully subscribed, with zero remaining to be sold. Atomic recorded its first sale on September 1st and filed the Form D on September 16th. The filing identifies Rossiter as chief executive officer, executive officer and director.

That title marks a change from Atomic's April 2025 launch, when Neal Suidan was identified as founder and CEO. Atomic's current website continues to present Suidan and Rossiter as co-founders. The new filing gives Rossiter the clearest current legal designation: he signed it as CEO.

Atomic has yet to publicly name the 13 investors or attach a round label to the financing. The filing identifies the security as equity, but does not provide a valuation or other terms. Calling the financing a Series A would be an inference. What is established is the size: the new round is roughly 6x Atomic's previously disclosed $3 million seed and brings its publicly reported funding to at least $21.51 million.

A planning system born during Tesla's Model 3 ramp

Rossiter and Suidan met while working as supply-chain planners at Tesla as the automaker was trying to scale Model 3 production. Atomic's account of its origins says spreadsheets buckled under that growth, outside vendors proposed year-long implementations and internal engineering resources were constrained.

Suidan and the planning group responded by building Vehicle Plan, an internal system that modeled Tesla's supply chain from end to end. Rossiter later left Tesla for global business-operations and market-expansion roles at Lyft. Suidan remained at Tesla until 2022, according to TechCrunch.

The pair began developing Atomic inside DVx Ventures in 2023 after speaking with planners at other physical-goods brands. They found versions of the same problem they had faced at Tesla: important inventory decisions lived across spreadsheets, while conventional planning suites required lengthy implementations and substantial consulting work.

That history shapes Atomic's product. Its planning platform models demand, manufacturing, purchasing, allocation, shipments and inventory at the unit level. Planners can query the plan in natural language, test scenarios, generate purchase-order recommendations and send approved changes back to an enterprise resource planning system. Atomic logs the interactions so planners can audit how a recommendation was produced.

Rossiter's pitch centers on keeping operators in control of the plan. Atomic uses AI to configure planning rules and handle repetitive analysis, while planners retain the ability to adjust assumptions and approve actions. That approach addresses a practical barrier to selling AI into supply chains: an unexplained forecast can become an expensive pile of inventory.

The implementation claim has become more realistic

Atomic's April 2025 launch materials said customers could be initially onboarded in under an hour. Atomic's current product page describes a two-month "hypercare" onboarding period and says one customer moved from an initial call to a live system in about two months.

Those figures describe different stages of deployment. The newer timeline is the more useful benchmark for customers evaluating how long it takes to put Atomic into production. Eight weeks would still undercut the 12-to-18-month rollouts Atomic associates with traditional planning suites, though that comparison comes from Atomic's own marketing.

Atomic's website says its software runs more than one million combinations of SKUs, locations and suppliers each day. The site identifies DoorDash and HelloFresh as daily users and displays other brands including LMNT, OOFOS and Starface World. Those customer references provide a stronger indication of commercial adoption than Atomic had at its seed announcement, but Atomic does not publish revenue, annual recurring revenue or a total customer count.

The performance figures remain self-reported. Atomic has claimed inventory-cost reductions of 20% to 50%, more than 40 planner hours saved each week and a 3.5x increase in inventory turnover. Atomic also reported that one early customer halved inventory while maintaining a 99% in-stock rate. The filing provides no operating metrics and declines to disclose Atomic's revenue range.

DVx's operator network stays close

Atomic was created inside DVx Ventures, the venture studio led by former Tesla president and Lyft chief operating officer Jon McNeill. DVx led Atomic's $3 million seed in April 2025, with Madrona Ventures participating.

The new Form D does not identify either backer as an investor in the $18.5 million round. Atomic's board roster nevertheless shows how closely the venture studio and earlier backers remain tied to Rossiter's work. The filing lists McNeill, former Tesla North America sales vice president Ganesh Srivats, technology founder Adrian Schauer and Madrona managing director Matt McIlwain as directors. Chris Hutton is listed as an executive officer.

Board seats do not establish participation in the new financing, and the identities of the 13 investors remain outside the filing. The roster does show that Rossiter has assembled operators and investors who have worked around enterprise software, consumer brands and Tesla's production scale-up.

Atomic will need that network as inventory software attracts larger checks. Doss, which integrates inventory management with accounting and ERP workflows, raised a $55 million Series B in March. Established vendors including SAP, Oracle, Kinaxis, o9 Solutions and Blue Yonder are also adding AI capabilities to broader planning suites.

Rossiter's bet is that Atomic can win by giving planners a configurable simulation layer without recreating the implementation burden of those incumbents. The $18.5 million round gives him considerably more room to prove that thesis. It also raises the standard of proof: recognizable customer logos and claimed inventory savings now need to turn into repeatable deployments and durable software revenue.