Heaviside Raises $60M Series B, Partners With Nammo

Heaviside Industries raised a $60M Series B at a company-reported $600M valuation on August 12, 2026. Felicis led the round, with significant participation from Hedosophia and additional backing from Menlo Ventures, Cantos, Flume Ventures, Qstar Capital, Friends & Family Capital, Anorak Ventures, MVP Ventures, and others.

The financing arrived with a second announcement that may matter more operationally: Nammo will supply warheads for Heaviside's multi-domain precision munitions platforms. The partnership connects a young autonomous-systems company to an established ammunition and propulsion manufacturer with 27 production sites across 12 countries.

The combination of capital and supply-chain capacity is the real story. Heaviside now has more money to expand production, hire, fulfill existing customer commitments, and build U.S. infrastructure, but its $600M valuation also makes execution more visible and less forgiving.

What Happened

Heaviside announced the Series B and Nammo partnership only 3 months after exiting stealth. The official release says Felicis led the financing, while Hedosophia participated significantly and a group of existing and new investors completed the syndicate. Heaviside said the round values the company at $600M.

The Los Angeles company previously announced a $28M Series A on May 11, 2026, led by Interlagos. The two disclosed rounds sum to at least $88M, although Heaviside has not separately presented that arithmetic as an official cumulative-funding figure. The pace between rounds is notable because Heaviside was founded in 2024 and remained in stealth for more than 2 years.

The Nammo agreement gives the announcement an industrial dimension. Nammo will serve as the warhead supplier for Heaviside's air, land, and sea precision munitions platforms, while Heaviside continues to own the platform, guidance, autonomy, and systems-integration challenge around those products.

Why the Nammo Partnership Matters

Defense hardware companies are often evaluated as if the hardest question is whether their technology works. That question matters, but the larger commercial test includes repeatable manufacturing, reliable component supply, safe integration, customer acceptance, and replenishment at useful volume. A polished prototype can impress a room; a dependable production system has to survive procurement and operations.

Nammo brings an established industrial base to that equation. The Norway-headquartered group operates across specialty ammunition, shoulder-fired weapons, and rocket motors, while Heaviside brings an autonomous platform portfolio designed for GPS-denied and contested environments. Their partnership does not eliminate integration or production risk, but it gives Heaviside a more credible foundation for moving from platform development toward scaled delivery.

What Heaviside Is Building

Founded by Phillip Walker, Heaviside develops autonomous precision strike technology for U.S. and allied special operations and conventional forces. The company's public portfolio includes MOTH, an electromagnetic signal-intelligence and land-spectrum-awareness product; TYR, an autonomous aerial munition; and HYDRA, an autonomous underwater munition. Heaviside says miniaturized electronics and electromagnetic technology underpin its cross-domain approach.

The company reported more than 50 engineers and operators across Los Angeles and Oslo when it emerged from stealth in May. A Tectonic Defense interview reported that Heaviside systems were in low-rate production and being tested by U.S. and NATO special forces and conventional forces. Those claims came from a direct interview with Walker and have not been independently disclosed through customer contract announcements.

The Investor Signal

Felicis is leading a round that includes significant participation from Hedosophia and continued support from Menlo Ventures, Cantos, Flume Ventures, and Anorak Ventures, among others. The investor mix suggests conviction in a company that combines autonomous systems, defense hardware, and manufacturing rather than a pure software model. The $600M valuation is the clearest expression of that conviction, but it is a financing marker, not evidence that production risk has vanished.

The Series B also follows quickly after Interlagos led the Series A. That compressed timeline means Heaviside has moved from a relatively quiet build phase into a much more public scaling phase, with investors now underwriting hiring, infrastructure, customer fulfillment, and a wider operational footprint across the U.S.

The round also reflects how defense investors are evaluating the full operating system around a product. Autonomy and guidance can create technical differentiation, but industrial partnerships, component availability, production planning, and operator feedback determine whether that differentiation reaches the field. By pairing the Series B with Nammo, Heaviside gave investors and customers a clearer picture of how it intends to connect its technology to a dependable supply chain.

What the Funding Changes

Heaviside says it will use the new capital to ramp production capacity, accelerate hiring, fulfill current commitments, meet future demand, and establish infrastructure for high-volume manufacturing. Those plans are concrete enough to be measured. Future announcements should show whether the company can convert its financing and Nammo relationship into reliable delivery, named programs, repeat orders, or other verifiable operating milestones.

The broader defense-technology lesson is straightforward: funding becomes more meaningful when product, supply chain, manufacturing, and demand begin to reinforce one another. Heaviside has assembled more of that system in a short period, and Phillip Walker's team deserves credit for pairing the financing headline with an industrial partnership. The next chapter will be written in production throughput and field performance, not valuation math.