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11 1/2 Holdings
11 1/2 Holdings was established in 2019 by Eduardo Medeiros as a single-family office based in Newtown, Pennsylvania.
11 1/2 Holdings
11 1/2 Holdings was established in 2019 by Eduardo Medeiros as a single-family office based in Newtown, Pennsylvania. The office consolidates the financial affairs of its principals under one integrated structure, combining investment operations with tax structuring, estate planning, and philanthropic activities. Rather than segmenting these functions across external advisors, the firm manages them centrally, a posture designed to align governance with long-duration capital allocation. The firm pursues a multi-asset strategy that includes private equity, public equities, real estate, and alternative fund commitments. It participates across early-stage, growth, and late-stage venture, typically through direct co-investments, special-purpose vehicles, and limited-partner positions in pooled funds. The investment mandate concentrates on North American opportunities in ClimateTech, Digital Health, Energy Transition & Renewables, and Healthcare Services, integrating ESG and AI/ML themes as cross-cutting technology focuses. The firm explicitly avoids gaming, media, cannabis, and secondaries. Medeiros operates the firm as the named principal, with a disclosed professional presence through the office's LinkedIn page. The office has not published team headcount, deployment totals, or adjacent vehicle structures such as a named philanthropic foundation, limiting visibility into the full operational architecture. No recent operational events — such as disclosed fund closes, leadership promotions, or public transactions — have been confirmed from the last 24 months. The structural differentiator is the firm's conscious integration of advisory functions — tax, estate, and philanthropy — alongside direct investment execution, a departure from the more common model where the family office delegates non-investment activities to external counsel. That bundling suggests a closed-architecture posture, though the office's co-investment activity confirms it will syndicate with external partners when thesis alignment exists.
General information
Firm type
Single Family Office
Year founded
2019
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Newtown
Corporate office
Newtown, PA, United States
Principals
Eduardo Medeiros
Principal
Sector focus
Frequently asked questions
Who runs investment decisions at 11 1/2 Holdings?
Eduardo Medeiros is the named principal and appears to lead investment decisions for the firm. The office operates without a publicly disclosed investment committee or additional named partners, suggesting a centralized decision-making structure under Medeiros. All professional presence points back to his LinkedIn profile.
How does 11 1/2 Holdings source proprietary deal flow?
The firm's sourcing model is not publicly detailed. Given its structure as a single-family office with a single named principal, deal flow likely originates through Medeiros's personal network, co-investor relationships, and direct engagement with entrepreneurs. The office's willingness to co-invest alongside aligned partners indicates it participates in syndicated networks rather than relying on a dedicated origination team.
Is 11 1/2 Holdings structured as a single family office or does it operate more like a venture firm?
11 1/2 Holdings is a single-family office, not a venture firm. It manages the principals' balance sheet across a diversified portfolio that includes venture, private equity, public equities, real estate, and alternative funds. It does not raise external capital or charge management fees — the structural hallmarks of a venture firm — though its direct co-investment activity may resemble venture-style deal execution.
Does 11 1/2 Holdings participate in fund commitments or only direct deals?
The firm participates in both. Its confirmed investment types include commitments to private equity and alternative funds alongside direct co-investments and special-purpose vehicles. This dual approach allows the office to access larger-scale opportunities through fund vehicles while concentrating capital into targeted direct deals where it can exercise more influence.
What investment stages does 11 1/2 Holdings typically target?
The firm covers the full spectrum from early-stage venture through growth and late-stage private equity. That stage flexibility is consistent with a single-family-office posture that does not have external LP constraints on deployment pace or holding period, enabling it to write checks across a company's lifecycle as thesis conviction supports.
Which sectors does 11 1/2 Holdings explicitly avoid?
The office has flagged Gaming, Media & Entertainment, Sports & Wellness, Luxury, EdTech, GovTech, LegalTech, and Cannabis & Psychedelics as sectors it does not pursue. That negative list reflects a deliberate avoidance of consumer-discretionary and regulatory-gray-zone categories in favor of regulated, infrastructure-adjacent sectors like climate and healthcare.
Does 11 1/2 Holdings maintain philanthropic structures, and how are they separated?
Philanthropic and mission-related investing is a confirmed activity, but the firm has not disclosed a named foundation or separate philanthropic vehicle. Without a public separation between the investment office and charitable activities, the two functions appear to operate under the same integrated governance structure, which may carry different tax and compliance implications than a standalone foundation model.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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