Fundraising FoxAngel Operator Partners (aop)
Angel networkActively deployingChicago · Pre-Seed–Seed · 2 people tracked
Also known as Angel Operator Partners
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Investment thesis
AOP positions itself as an early-stage partner for Enterprise AI, backing bold founders building impactful products across Enterprise Tech, Vertical AI, AI Infrastructure, and Deep Tech. Beyond providing capital, the firm emphasizes operational support, backing founders who are ready to scale rather than just raise. Its team and network of operator and founder LPs bring decades of experience in building, selling, and scaling enterprise solutions.
Source: firm website, verified Sep 25, 2026.
Team · 2 people
from public directoriesWhat they invest in
from 5 of 7 portfolio companiesAI & Machine Learning ×3Enterprise Software ×3Climate Tech ×2Cybersecurity ×2Deep Tech ×2Advanced Manufacturing ×1Cleantech ×1Data & Infrastructure ×1
HQs:United States×4
Investments · 7 tracked
founders shown can be your intro pathAccelR8 is an early-stage venture firm that invests in and helps build climate-focused companies transforming physical industries, backing founders commercializing breakthrough science and engineering to reduce emissions.
CleantechClimate TechDeep TechBoston, US
Daniel Morgan(Founder)inLouis Kang(Co-founder & Partner)
Co-investorsClean Energy Ventures
Antigen provides continuous offensive security testing for enterprise production environments using AI agents nightly and human red teams monthly, with findings integrated into engineering tools.
AI & Machine LearningCybersecurityDeveloper ToolsEnterprise SoftwareSan Francisco, US
Saad Jamal(Founder)inAbdullah Nauman(Founder)in
Co-investorsEast Sunshine VenturesTranspose Platform ManagementY Combinator8VCAlumni VenturesAndreessen Horowitz+10 more
Apollo Atomics develops compact nuclear power systems designed for rapid deployment.
Advanced ManufacturingClimate TechDeep TechEnergyBoston, US
Assil Halimi(Founder)inDrew Walker(Co-Founder/COO)in
Co-investorsAlumni VenturesCliff CapitalFifty YearsKima VenturesKoru CapitalNeutron Power Ventures+43 more
Causify offers a causal AI platform that maps cause-effect relationships across operational data from ERP, IoT, and other systems, letting teams simulate interventions and receive ranked, actionable recommendations.
AI & Machine LearningData & InfrastructureEnterprise Software
Co-investorsUniversity System of Maryland Momentum Fund
Nebula Security uses AI-driven security pipelines to accelerate vulnerability research in widely used software such as operating systems, browsers, and applications.
AI & Machine LearningCybersecurityEnterprise SoftwareVancouver, US
Eten Zou(CEO and co-founder)inYuan Tan(CTO and co-founder)inFrank Wu(Founder)inXiaochuan Yu(Founder)in
Co-investorsRedbud Trail GroupVela PartnersY Combinator2468 VenturesAera VCC Square Capital+10 more
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Cone LabsHavilo
Portfolio news
latest coverage across their companiesNebuSec · ycombinator.com · Jul 23, 2026
Apollo Atomics, Inc. · ycombinator.com · May 27, 2026
Antigen · ycombinator.com · Oct 10, 2025
Frequently asked questions
- How many investments has Angel Operator Partners (aop) made?
- Angel Operator Partners (aop) has 7 tracked investments.
- What stage does Angel Operator Partners (aop) invest at?
- Angel Operator Partners (aop) invests at the Pre-Seed, Seed stages.
- What sectors does Angel Operator Partners (aop) focus on?
- Angel Operator Partners (aop) focuses on AI & Machine Learning, Data & Infrastructure, Deep Tech, Enterprise Software.
- Where is Angel Operator Partners (aop) located?
- Angel Operator Partners (aop) is headquartered in Chicago, US.
- Who does Angel Operator Partners (aop) co-invest with?
- Angel Operator Partners (aop) most often shares deals with Transpose Platform Management, Y Combinator, Kima Ventures, among 17 tracked co-investors.
Images
Co-investors · 6
Techstars is a global startup accelerator and early-stage investor that funds and mentors ambitious founders, providing $220K in capital, a three-month program, and access to a worldwide network of mentors, investors, and corporate partners.
Basis Set Ventures is an AI-native venture firm that uses a modern machine learning stack and foundation models to find and support AI companies, positioning itself as a hands-on partner to founders.
Cyfrin provides blockchain security services, smart contract audits, developer education, and professional certifications to global institutions, enterprises, and protocols.
Trust Ventures is a venture capital fund investing in companies developing technologies for large industries while navigating regulatory and policy challenges. The firm's portfolio companies have achieved regulatory approvals and market entries across multiple jurisdictions.
E12 Ventures is an early-stage venture capital firm that backs founders solving major challenges across global industries, combining a seasoned seed fund with a later-stage venture team supported by international investors.
Firms observed investing alongside Angel Operator Partners (aop), from public investor directories. Shared companies are the overlap with Angel Operator Partners (aop)'s recorded portfolio.
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