Fundraising Fox
Hatzimemos/Libby
Venture studioNew York · Pre-Seed–Growth · 5 people tracked
Also known as 903 PARTNERS LLC D/B/A CITYROCK VENTURE PARTNERS
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Investment thesis
H/L Ventures backs exceptional teams pursuing large, fast-growing markets with a returns-driven, hands-on approach. The firm operates through four arms: a flagship company-building studio that co-builds startups from concept to post-seed, a growth equity practice investing in Series A and beyond, a credit arm offering flexible capital to ecosystem companies, and an advisory practice serving corporate leadership. It stays engaged nearly daily with portfolio companies, offering strategic, operational, and network support throughout the founder journey. Where a company's mission improves outcomes for people or planet, the firm treats it as a tailwind and scales it with the same discipline.
Source: firm website, verified Sep 29, 2026.
Team · 5 people
from curated & public directories
What they invest in
from 9 of 16 portfolio companiesClimate Tech ×5Cleantech ×4Consumer ×3SaaS ×3AI & Machine Learning ×2Circular Economy ×2Impact & Social Good ×2New Materials ×2
HQs:United States×8
Investments · 16 tracked
founders shown can be your intro pathBy year:2026 · 12020 · 12 dated
Andie is a direct-to-consumer swimwear and apparel brand focused on fit, quality materials, and simple everyday design.
ConsumerDirect to ConsumerE-commerceNew York, US
Melanie Travis(Founder)inLeah Schwartz(Executive Officer, Director)Gregory F. Kiernan(Director)Zvi Ben Haim(Director)
Co-investorsFeenix Venture Partners LLCCityRock Venture PartnersGaingelsMarcy Venture PartnersSINEWAVE VENTURESTMV
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Aunt Flow provides free, organic cotton period product dispensers for public bathrooms in schools and businesses across North America.
ConsumerFemTechHealthtechImpact & Social GoodWellness & FitnessColumbus, US
Claire Coder(Founder + CEO)in
Co-investors37 AngelsAmboy Street VenturesBreak Trail VenturesChloe CapitalCoalition OperatorsFarvatn Venture+13 more
Automotus uses computer vision and AI to help cities and airports manage commercial vehicle traffic and reduce CO2 emissions.
AI & Machine LearningClimate TechGovTechMobility & TransportationSaaSLos Angeles, US
Harris Lummus(Executive Officer, Director)Jordan JustusinHarris Lummisin
BoardOliver Libby(Director)Tom Spengler(Director)Gabe Klein(Director)in
Co-investorsBand of AngelsE8 AngelsEmerging VenturesIrishAngelsKeiki CapitalPartnership Fund for NYC+6 more
BlocPower upgrades buildings to reduce emissions and improve efficiency through sustainable retrofits and inclusive financing, focusing on underserved communities.
CleantechClimate TechImpact & Social GoodPropTech
Brian Lindsey(CEO)in
Co-investorsAccelr8American Family Insurance Institute for Corporate and Social ImpactCleo CapitalKapor CapitalMaC Venture CapitalOperator Collective+3 more
BrandVerge is an advertising agency that provides media planning, buying, and organic social/influencer campaign management for brands, including DTC companies.
AdTechCircular EconomyCleantechClimate TechMarketing TechNew MaterialsNew York, US
Co-investorsBay Bridge Ventures ClimateBoston Harbor AngelsGeekdomRogue Insight CapitalTech Square VenturesWestchester Angels+3 more
GlacierGrid provides smart energy management software that monitors and optimizes HVAC and refrigeration systems to reduce energy consumption and costs.
AI & Machine LearningCleantechClimate TechConstruction TechEnergySaaSRichmond, US
Manik Suri(Founder and CEO)inJoe Parisi(Founder)inNicki Parisi(Founder)inGerald Zingraf(Chief Operating Officer)inLiz Piontkowski(VP of Operations)Alex See(VP of Product)in
Co-investors1st Course CapitalBarrel VenturesBay Bridge Ventures ClimateClocktower VenturesCollaborative FundDeciens+14 more
Loliware develops seaweed-based materials and climate technology solutions to replace plastic with regenerative alternatives.
Circular EconomyCleantechClimate TechNew MaterialsSan Jose, US
James Mastronardi(Executive Officer)Jonathan Plisco(Executive Officer, Director)in
BoardEmma Jenkin(Director)Justin Kamine(Director)Cassy Liberman(Director)Oliver Libby(Director)in
Co-investorsAlumni VenturesBay Bridge Ventures ClimateGeekdomGiant LeapGratitude RailroadRogue Insight Capital+5 more
Meroxa builds real-time data integration and streaming tools to help organizations liberate data from silos and create data-driven applications.
Cloud ComputingData & InfrastructureDeveloper ToolsEnterprise SoftwareSaaS
DeVaris Brown(Founder)inAli Hamidi(Founder)
Co-investorsAmplify PartnersDrive CapitalMaterialized View CapitalRoot Ventures Manager, LlcWellington ManagementAddition+5 more
Vivvi provides full-day child care and early learning programs for working families, staffed by trained teachers using a research-based curriculum.
ConsumerEdTechFuture of WorkHR TechNew York, US
Charles Bonello(Executive Officer, Director)inBenjamin Newton(Executive Officer, Director)Alexander Farkas(Director)
BoardStefan Szanto(Director)Brian Hirsch(Director)inAndrew Kaplan(Director)
Co-investorsAble PartnersConversion Venture Capital (CVC2)Eastward Capital PartnersTribeca Venture PartnersRethink Capital PartnersThe Fund
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
HollerMonumentSealedSolsticeSorceroWalnut
Portfolio news
latest coverage across their companiesAutomotus · automotus.ai · Dec 19, 2025
Frequently asked questions
- How many investments has Hatzimemos/Libby made?
- Hatzimemos/Libby has 16 tracked investments, including 1 dated in the last 24 months.
- What stage does Hatzimemos/Libby invest at?
- Hatzimemos/Libby invests at the Pre-Seed, Seed, Series A, Series B, Growth stages.
- What is Hatzimemos/Libby's typical check size?
- Hatzimemos/Libby typically writes checks of $10K – $1.5M.
- What sectors does Hatzimemos/Libby focus on?
- Hatzimemos/Libby focuses on Impact & Social Good, Sector Agnostic.
- Where is Hatzimemos/Libby located?
- Hatzimemos/Libby is headquartered in New York, US.
- Does Hatzimemos/Libby lead rounds?
- Yes, Hatzimemos/Libby leads investment rounds.
Media · Podcasts & interviews
from their channelA Developing Chasm Between Entry Level and Senior Level Jobs
H/L Ventures
Rethinking Cost Control for Startups in a Changing Landscape
H/L Ventures
Divergence within the Venture Industry
H/L Ventures
Daily Active Engagement and Platform with Galina Ozgur
H/L Ventures
HL For Starters Following Smart Money
H/L Ventures
Steps to Prepare for an Exit
H/L Ventures
Co-investors · 5
Led by investors including Larry Marcus, Marcy Venture Partners is a venture capital firm investing in consumer, culture, and positive impact.
Deciens Capital is a venture capital firm backing early-stage founders building the next generation of financial services, aiming to be the first material capital into fintech companies.
Zero Infinity Partners (ZIP) is an investment firm focused exclusively on infrastructure, backing founders and companies deploying innovative technologies and business models across foundational infrastructure sectors.
TTV Capital is a venture capital firm that invests in fintech companies operating across financial services and consumer finance.
Black Tech Nation Ventures is a for-profit venture fund investing in Black-led startups and diverse founding teams, operating under the Black Tech Nation umbrella (which itself is a separate fiscally sponsored non-profit).
Firms observed investing alongside Hatzimemos/Libby, from public investor directories. Shared companies are the overlap with Hatzimemos/Libby's recorded portfolio.
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