Commercial
Offices and logistics held for the quality of the tenant and the income they bring, never for resale.
4BACH · Family Office
Real Estate, Companies and Holdings
Zurich
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We don't chase cycles. We invest to outlast them.
I / Structure
Held in one hand.
Every asset, entity, and decision answers to a single office.
4BACH
Real Estate
Owned and managed
CommercialMulti-family
Enterprise
Held directly
Tech & AIInfrastructure
Reserves
Held directly
SecuritiesTangibles
Charity
Given independently
EducationHealth
Disclosure
Out of respect for privacy, individual holdings are not disclosed.
II / Holdings
What we own.
Three kinds of ownership, held directly, in service of the same mission.
Real Estate
Held indefinitely
Multifamily
Apartment buildings held for the rent roll, where occupancy and income hold steady through every cycle.
Enterprise
Held for the long term
Technology & AI
Software and AI with paying customers and a proven model, backed alongside founders and never above them.
Energy & Infrastructure
Generation and grid with contracted revenue, held directly and as long-term stakes in the businesses behind them.
Reserves
Held in reserve
Securities
Listed equity and fixed income, held for balance rather than return and for the liquidity it provides.
Tangibles
Metals and objects of lasting worth, kept outside the financial system for the decade that goes wrong.
Art & Collectibles
Works acquired to be kept and cared for, valued for what they are and often lent for others to enjoy.
Horizon
Holding periods reflect intent at acquisition, not a forecast. Individual assets are not disclosed.
III / Approach
Where we differ.
Four principles, held without exception. What we own is narrower, and steadier, for them.
CapitalPatient and permanent
Narrow by choice
Few holdings, known well
A small number of positions, each one understood in detail. Breadth is not the aim.
Held to keep
Nothing bought to be sold
Assets are judged on what they earn, not on who buys them next.
Alongside founders
Minority, board light
Founders run their businesses. We supply patience and capital.
Kept in private
Nothing announced
Holdings and grants carry no family name.
IV / Charity
What we give.
A fixed share of what the portfolio earns, given away every year.
A share of operating incomeGiven away annually
Education
Schools and scholarships
Health
Clinics and maternal care
Water
Boreholes and upkeep
Note
Grants run five years or more and are unrestricted.
V / Contact
Write to us.
Every letter reaches the office directly, read in confidence and answered.
- Office
- Bleicherweg 10 · Zurich · Switzerland
- Access
- By appointment
- Reply
- Within a few business days
Held in confidence. Never shared, never announced.
4BACH
© 2026 4BACH
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Terms of Use
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Privacy Policy
Not an offer of securities.
No outside capital accepted.
No outside capital accepted.
Terms of Use
These terms
This website is published by Avvi Management LTD, a company incorporated in Hong Kong under registration number 79422166, trading as 4BACH (“4BACH”, “we”, “us”). Its registered office is Suite C, Level 7, World Trust Tower, 50 Stanley Street, Central, Hong Kong; correspondence may be addressed to Bleicherweg 10, 8002 Zurich, Switzerland. By accessing the site you accept these terms. If you do not accept them, do not use the site.
We may revise these terms at any time by publishing a new version here. The version in force is the one published when you access the site.
Information only
This site is published for general information. It is not an offer to sell, nor a solicitation of an offer to buy, any security, fund interest, partnership interest or other financial instrument, and it is not an invitation to invest, co-invest or transact on any basis.
Nothing here is investment, legal, tax, accounting or other professional advice, a personal recommendation, or an assessment of suitability for anyone. Take your own independent advice before acting on anything you read here.
No outside capital, no client relationship
4BACH is a single family office. It administers the assets of one family. It does not accept, solicit or manage capital from third parties, does not act as adviser, distributor or intermediary for any third party, and offers no services to the public.
No relationship of client, adviser, agent, partner, joint venture or fiduciary arises between you and us from your use of this site, from the contact form, or from any correspondence that follows. Any such relationship would require a separate written agreement signed by us.
Regulatory status
Because it manages the assets of one family only and takes no third-party capital, Avvi Management LTD does not carry on any activity that requires authorisation or a licence as a portfolio manager, a manager of collective assets or a financial institution in the jurisdictions in which it operates, and it is not supervised by any financial regulator. It is not registered with any financial regulator in any jurisdiction, and no regulator has reviewed or approved anything on this site.
Where this site may be read
The site is not directed at any person in any jurisdiction where its publication or availability would be contrary to local law, or would subject us to any registration, licensing or filing requirement. If the law that applies to you restricts your access, do not use the site. Observing that law is your responsibility.
Statements about the future
Where this site describes intentions, horizons or approach, how long an asset is expected to be held, for instance, those statements reflect intent at the time of writing. They are not a forecast, a promise or a guarantee. Circumstances change, and we may act differently without notice. Past performance is never a guide to future results.
Accuracy and availability
Information is provided as it stands. We prepare it with care but give no warranty, express or implied, that it is accurate, complete, current or fit for any purpose. Descriptions of what we hold are indicative and deliberately incomplete: individual assets are not disclosed. We may change or withdraw any part of the site at any time and are under no obligation to update it. We do not warrant that the site will be available, uninterrupted, or free of error or harmful code.
Your use of the site
You may view and print pages for your own information. Without our written consent you may not: reproduce, republish or distribute the content; use automated means to access, scrape, index, harvest or copy it; use it to train, fine-tune or ground any machine learning or artificial intelligence system; probe, scan or test the site or its infrastructure; circumvent any security or access control; or use the site to transmit unlawful, misleading or harmful material.
Material you send us
Please do not send us confidential material. Any proposal, business plan, introduction, idea or other material you send us, through the form or otherwise, is received on a non-confidential and non-obligatory basis. We do not undertake to keep it secret, we may already be considering something similar or identical, and we are free to decline it without explanation. We take on no obligation to review, acknowledge, answer, return or pay for anything you send, and nothing you send places any obligation on us.
You warrant that anything you send is yours to send, is lawful, and breaches no right of any other person and no duty of confidence you owe.
Intellectual property
The site and everything in it, text, layout, design, graphics, and the 4BACH name and mark, belongs to us or is licensed to us, and is protected by copyright and other rights. You are granted no right or licence beyond the limited permission set out above.
Other sites
Links to other sites are provided for convenience. We do not control them, do not endorse them, and take no responsibility for their content, their security, or how they handle your data.
Liability
To the fullest extent the law allows, we exclude liability for any loss or damage arising from your use of, or inability to use, this site or anything on it, including indirect or consequential loss, loss of profit or opportunity, and loss arising from reliance on what is published here. Nothing in these terms excludes or limits liability for unlawful intent or gross negligence, for death or personal injury, or any other liability that cannot lawfully be excluded.
Sanctions and lawful conduct
By writing to us you confirm that you are not subject to sanctions administered by Switzerland, the United Nations, the European Union, the United Kingdom, the United States or the Hong Kong SAR, and that you are not acting for or on behalf of a person who is. We may decline any approach, at any stage, without giving reasons.
Privacy
How we handle personal data is set out in the Privacy Policy, which forms part of these terms.
General
If any provision of these terms is held invalid or unenforceable, the rest stands, and the invalid provision is replaced by one that comes closest to its intended purpose. If we do not enforce a provision, we do not waive it. These terms are for the benefit of Avvi Management LTD and of the family, officers, employees and agents behind it, each of whom may rely on them.
Language
This site is published in several languages for convenience. If the versions differ, the English version of these terms prevails.
Governing law and jurisdiction
These terms, and any dispute or claim arising out of them or out of your use of this site, including non-contractual claims, are governed by the laws of the Hong Kong Special Administrative Region of the People’s Republic of China, without regard to its conflict of law rules and excluding the United Nations Convention on Contracts for the International Sale of Goods. The courts of Hong Kong have exclusive jurisdiction, save that we may bring proceedings in any other jurisdiction where you are domiciled or hold assets. If you are a consumer resident in the European Economic Area, this does not deprive you of the protection of the mandatory provisions of the law of your country of residence, nor of the right to bring proceedings there.
Last updated July 2026
Privacy Policy
Who is responsible
This notice explains how we handle personal data on this website and in the correspondence that follows from it. The controller is:
Avvi Management LTD, trading as 4BACH
Registered office: Suite C, Level 7, World Trust Tower, 50 Stanley Street, Central, Hong Kong
Company registration number: 79422166
Correspondence address: Bleicherweg 10, 8002 Zurich, Switzerland
Data protection enquiries: inquiries@4ba.ch
Telephone: +41 79 621 70 72
Because we are established outside the European Economic Area and offer this site to people within it, we have appointed a representative in the EU under Article 27 GDPR: Steven Maindl. Writing to that representative reaches us.
We have appointed a data protection officer, who can be reached at inquiries@4ba.ch.
Which law applies
We are incorporated in Hong Kong and process personal data under the Personal Data (Privacy) Ordinance (PDPO). Because this site is offered to visitors in Switzerland and the European Economic Area, we also comply with the Swiss Federal Act on Data Protection (FADP), as revised with effect from 1 September 2023, and the EU General Data Protection Regulation (GDPR). This notice is written to meet all three, and where they differ we apply the stricter standard.
What we collect
What you send us. If you write through the form, we receive the name, email address, organisation, nature of enquiry and message you provide, together with the fact and time of the consent you give.
Correspondence. If we reply and an exchange follows, we hold that correspondence and whatever contact details it contains.
Technical information. When a page is requested, our hosting provider records the IP address, the browser and operating system your device reports, the page requested, the referring page and the time of the request. These server logs arise automatically and are not linked to the form.
Nothing else. This site sets no cookies, stores nothing in your browser, and uses no analytics, advertising, profiling, tracking pixels, social plug-ins or device fingerprinting. There is nothing here for you to consent to or opt out of. We do not buy personal data, and we do not add to what you send us from outside sources.
Please do not send us sensitive data
The form is for a first approach and nothing more. Please do not send special categories of personal data, health, religious, political or philosophical views, trade union membership, genetic or biometric data, data on sexual life or orientation, or information about criminal proceedings or convictions. We do not need them and do not ask for them.
Why we process it, and on what basis
To read and answer your enquiry. Under the GDPR the basis is Article 6(1)(b), steps taken at your request before entering into a contract, or Article 6(1)(f), our legitimate interest in answering correspondence addressed to us. Under the FADP the processing serves the purpose made apparent at collection. Under the PDPO we use your data only for the purpose for which you gave it and purposes directly related to it.
To keep the site available and secure and to detect and defend against misuse. The basis is Article 6(1)(f) GDPR. We have weighed that interest against your own and consider it does not override them: logs are short-lived, narrow, and never used to build a picture of you.
To meet legal duties to which we are subject, including duties to retain records. The basis is Article 6(1)(c) GDPR.
To establish, exercise or defend legal claims. The basis is Article 6(1)(f) GDPR.
Providing your details is required neither by law nor by contract. You are free not to write to us, but without a name, an address to reply to and a message we cannot answer.
Who else sees it
Inside the office, access is confined to the people who need it. Beyond that:
Form delivery. Messages sent through the form are transmitted via FormSubmit (formsubmit.co), which forwards them to our mailbox and acts as our processor.
Hosting. The site is hosted by Vercel Inc. (United States), which processes server logs on our behalf.
Email. Our correspondence is handled by IONOS SE (Germany).
Professional advisers. Where a matter requires it, our lawyers, auditors and IT contractors, each bound by professional secrecy or by written confidentiality obligations.
Authorities and courts. Where the law requires it, or where it is necessary to bring or defend a legal claim.
We do not sell, rent or share your data for marketing, and we add no one to a mailing list.
Data sent abroad
We are established in Hong Kong, and some of our service providers are in other countries, including the United States. Two points follow.
First, because we, the controller, are in Hong Kong, which is not the subject of an adequacy decision by the European Commission or the Swiss Federal Council, any personal data you send from the European Economic Area or Switzerland reaches us as a restricted transfer. We make that transfer under the Standard Contractual Clauses issued under Article 46 GDPR, together with the Swiss addendum recognised under the FADP, and any supplementary measures our assessment shows to be necessary.
Second, transfers to our processors rest on the same footing: an adequacy decision where one applies, including the EU-US and Swiss-US Data Privacy Framework where the recipient is certified, or the Standard Contractual Clauses where it does not. The adequacy decision underlying the Data Privacy Framework is the subject of an appeal pending before the Court of Justice of the European Union; if it ceases to apply, we will rely on the Standard Contractual Clauses.
A copy of the safeguards we rely on can be requested from us.
How long we keep it
Correspondence is kept as long as the matter it concerns requires, and thereafter for any statutory retention period that applies to us, including company and accounting record-keeping duties. Where no such duty applies, enquiries that lead nowhere are deleted within 12 months.
Server logs are kept for 12 months and are then deleted or anonymised.
Material relevant to a legal claim is kept until the claim and any applicable limitation period are spent.
Your rights
You may ask what we hold about you and receive a copy; have inaccurate data corrected; have data erased; ask that processing be restricted; and object at any time to processing based on our legitimate interests. Where processing rests on consent, you may withdraw it at any time, without affecting the lawfulness of what was done beforehand. In the EEA you may also ask to receive data you provided in a portable form. Under the PDPO you may ask whether we hold your personal data, obtain a copy, and request correction.
Write to inquiries@4ba.ch. We answer within the periods the law allows, under the GDPR, generally one month, extendable by two further months where a request is complex. We may ask for information to satisfy ourselves of your identity, and will use it for no other purpose. Exercising these rights costs nothing; where a request is manifestly unfounded or excessive we may charge a reasonable fee or decline to act, and will say why.
Complaints
You may complain to a supervisory authority. In Hong Kong this is the Office of the Privacy Commissioner for Personal Data (PCPD). In Switzerland this is the Federal Data Protection and Information Commissioner, Feldeggweg 1, 3003 Bern. In the EEA it is the authority of your residence, your place of work, or the place of the alleged infringement. We would rather you came to us first, and will take any complaint seriously.
Automated decisions
We take no automated decisions producing legal or similarly significant effects, and carry out no profiling.
Security
The site is served over an encrypted connection, and messages reach us encrypted in transit. Access is confined to the people at the office who need it, and we keep our technical and organisational measures under review. No transmission over the internet can be made entirely secure, and we cannot guarantee absolute security.
Children
This site is not directed at children, and we do not knowingly collect their personal data. If you believe a child has sent us data, write to us and we will delete it.
Other sites
Where this site links elsewhere, the privacy notice of the site you reach applies to what happens there, not this one.
Changes to this notice
We may update this notice. The version in force is the one published here, under the date shown below.
Language
This notice is published in several languages for convenience. If the versions differ, the English version prevails.
Last updated July 2026