Backing the Science That Rewires the Future

Deep capital for deep technology — semiconductors, quantum systems, photonics, and advanced materials.

View Portfolio Our Thesis

Coexin Technology Partners - Scale & Focus

Committed capital. Patient time horizon. Singular technical focus.

$270M Assets Under Management
10 Portfolio Companies
$8M Average Check Size
Deep Technology Focus
Investment Thesis

Three Technical Bets on the Next Decade

Semiconductor cleanroom facility showing wafer fabrication equipment
Semiconductors

IC Design & Chip Architecture

We back pre-Series A teams building domain-specific silicon — custom chips designed for inference workloads, edge environments, and energy-constrained compute. Our focus: founders with deep EDA, RISC-V, and advanced packaging expertise who can own the architecture, not just assemble off-the-shelf IP. Typical check: $3–8M led. Portfolio includes ArborICS and OxideLayer.

Quantum Computing

Quantum Systems & Error Correction

We back teams solving the actual engineering constraint in quantum: logical qubit overhead and fault-tolerant operation at commercially viable qubit counts — not teams chasing benchmark headlines. We invest at pre-Series A with a $3–8M initial check, reserving capital for follow-on as hardware milestones clear. Portfolio includes QuantVault and CrystalQNet.

Quantum computing laboratory with cryogenic dilution refrigerator equipment
Photonics research bench with fiber optic components and laser equipment
Photonics & Materials

Silicon Photonics & Advanced Materials

We back teams making silicon photonics and advanced materials manufacturable at scale — founders tackling optical interconnects for AI datacenters, 2D material heterostructures for next-gen transistors, and novel gate oxides that copper and conventional dielectrics cannot match. Typical check: $3–8M led at pre-Series A. Portfolio includes Lumenwire and Tesseract Matter.

How We Work

Our Investment Process

We move fast when we've done the work. For deep tech, that means genuine technical diligence before the first meeting, not after the term sheet.

01

Source

We track academic spinouts, patent filings, and DARPA program graduates. The best deep tech companies often don't announce themselves — we find them in Nature papers and conference proceedings before they've incorporated.

02

Diligence

Our partners have built chips, run quantum labs, and operated fabs. We review IP, reproduce experimental claims, and stress-test the physics before opening any financial conversation. No hand-waving on technical risk.

03

Partner

We take a board seat and stay active. That means introductions to the 12 Fortune 500 procurement officers who matter, recruiting the technical VP you can't find on LinkedIn, and showing up when the physics doesn't cooperate.

04

Scale

Deep tech companies need different growth playbooks. We help portfolio companies navigate government contracts, CHIPS Act funding, strategic partnerships with fabs, and the transition from lab prototype to pilot production.

Portfolio Highlights

Eight Companies Redefining What's Possible

From sub-2nm gate oxides to fault-tolerant quantum arrays — our portfolio companies are solving problems that weren't solvable five years ago.

IC Design Series B
ArborICS
Next-gen RISC-V custom silicon for edge AI inference. Austin, TX.
Quantum Series A
QuantVault
Error-corrected qubit arrays for financial modeling. Boston, MA.
Photonics Series B
Lumenwire
Silicon photonics interconnects for AI data centers. San Jose, CA.
Materials Series A
Tesseract Matter
2D materials and heterostructures for next-gen transistors. Cambridge, MA.
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Working on Something That Didn't Exist Five Years Ago?

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