Air Street Capital | Activity | F4

Air Street Capital Activity

Every public signal F4 has attached to this firm, with sources and cross-entity links.

Types

Time range

Essay

Nathan Benaich published the 9th annual State of AI Report, covering AI building AI, physical AI, booming inference economics, escalating cyber risks, and the three-lab frontier race between Anthropic, OpenAI, and Google. The report is the most widely read independent analysis of AI progress.

Air Street Capital

Air Street CapitalAir Street Capital

press.airstreet.comOCT 8, 2026

OCT 8, 2026

Investment

Air Street Capital led Jack & Jill's $40M Series A round. Jack & Jill is an AI agent platform that helps candidates find career opportunities (Jack) and companies recruit (Jill). Madrona joined the round, with Creandum and Entrepreneurs First also participating. The company has arranged 25,000+ interviews and 385,000+ people have spoken with Jack.

Jack & Jill AI

Jack & Jill AI Air Street Capital

press.airstreet.comSEP 15, 2026

SEP 15, 2026

Investment

Co-invested in STARK Defence's EUR500M round led by Sequoia and Founders Fund to build Europe's next defense prime.

STARK Defence

STARK Defence Air Street Capital

press.airstreet.comJUN 26, 2026

JUN 26, 2026

Essay

Nathan Benaich published an essay arguing that a domestic data center does not confer control over the models inside it, and Europe's practical goal should be enough domestic AI capability to keep essential work running through a cutoff.

Air Street Capital

Air Street CapitalAir Street Capital

press.airstreet.comJUN 21, 2026

JUN 21, 2026

Investment

Co-led Perceptic's $12M seed round for an AI operating system for drug development, alongside Accel.

Perceptic

Perceptic Air Street Capital

press.airstreet.comMAY 26, 2026

MAY 26, 2026

Essay

Published State of AI covering cyber capability advances, infrastructure consolidation (OpenAI $122B raise, Anthropic partnerships), Chinese AI competitiveness, and robotics foundation models progress.

State of AI May 2026: Cyber Capabilities and Infrastructure Consolidation

Air Street Capital

nathanbenaich.substack.comMAY 2026

MAY 2026

Investment

Co-invested in Sereact's $110M Series B (led by Headline) for embodied AI robotics scaling.

Sereact

Sereact Air Street Capital

sereact.aiAPR 27, 2026

tech.eu

sifted.eu

APR 27, 2026

Essay

Published monthly State of AI essay on emerging constitutional confrontation over frontier model use in national security.

State of AI April 2026: Constitutional Debates

Air Street Capital

nathanbenaich.substack.comAPR 2026

APR 2026

New Fund

Air Street Capital raised $232,323,232 for Fund III, making it the largest solo GP venture firm in Europe. The fund will lead early-stage rounds with checks of $500k to $15M and make select growth investments up to $25M, focusing on AI-first companies in North America and Europe across software, developer tools/infrastructure, techbio/science, and defense/security.

Air Street Capital

Air Street CapitalAir Street Capital

press.airstreet.comMAR 23, 2026

MAR 23, 2026

Milestone

Portfolio company Profluent announced $2.25B partnership with Eli Lilly for AI-designed CRISPR therapeutics.

Profluent Bio

Profluent Bio Air Street Capital

press.airstreet.comMAR 2026

MAR 2026

New Fund

Closed Fund III with $232.3M, making Air Street the largest solo GP venture firm in Europe.

Fund III

Air Street Capital

press.airstreet.comMAR 2026

MAR 2026

3 essays· JAN 2026 – FEB 2026Show all

Essay

Nathan Benaich published monthly State of AI essay on the shift from LLMs to small language models and efficiency as competitive moat.

State of AI February 2026: Efficiency is the New Scale

Air Street Capital

nathanbenaich.substack.comFEB 2026

FEB 2026

Essay

Essay on how robots can leverage latent space and AI capabilities in embodied systems.

Dreaming in latent space

Air Street Capital

press.airstreet.comFEB 2026

FEB 2026

Essay

Published a year-in-review essay arguing AI's next chapter is defined by deployment and diffusion rather than frontier breakthroughs.

2025 Year in Review

Air Street Capital

press.airstreet.comJAN 25, 2026

JAN 25, 2026

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