# Klingenstein Fields & Company

Klingenstein Fields & Company is a Multi Family Office based in New York, United States.

## Overview

- **Organization type:** Multi Family Office
- **Headquarters:** New York, United States
- **Region:** North America
- **Address:** New York, NY, United States
- **Founded:** 1989
- **Assets under management:** 5.2B (Altss estimate)
- **Website:** klingenstein.com
- **LinkedIn:** https://www.linkedin.com/company/klingenstein-fields

## Regulatory record

- **CRD number:** 105907
- **SEC file number:** 801-33347
- **Registration status:** APPROVED
- **Latest Form ADV filing:** 2026-05-18T05:00:00.000Z
- **Reports private funds:** Yes
- **Private funds reported:** 0
- **IAPD record:** https://adviserinfo.sec.gov/firm/summary/105907

## About

Founded in 1989, Klingenstein Fields & Company emerged from the Klingenstein family's deep roots in investment banking at Wertheim & Co. Today, Co-Founder Kenneth Fields provides the link to that origination story, while President and CEO James Williams runs the enterprise alongside the family's third generation, represented by Andrew Klingenstein. The firm operates as a registered investment advisor in New York, advising high-net-worth individuals, families, and institutions alongside its core multi-family office practice. The advisory casts a wide net across hedge funds, private credit, and direct venture capital commitments. It participates in fund structures and direct co-investment vehicles, targeting early-stage startups, growth rounds, and complex succession-driven transactions. Its sector footprint spans Healthcare Services, Consumer Tech, and Enterprise Software. Confirmed investment positions are not publicly cataloged, but the firm maintains a bicoastal presence with its San Francisco office, giving it access to Bay Area deal flow. With an estimated $5B+ in managed assets (Altss estimate), the firm has built its practice around a tight network of peer organizations. James Williams is a member of the Young Presidents' Organization (YPO), and Jonathan Roberts, a senior figure at the firm, previously chaired the Board of Governors for the Investment Adviser Association. The advisory maintains a significant philanthropic linkage through the Esther A. and Joseph Klingenstein Fund, which maintains a strategic relationship with the Klingenstein Center at Columbia University's Teachers College. Its structural differentiator is a genuine multi-family architecture, not a single-family office that later opened its doors. The firm melds two distinct family legacies — Klingenstein and Fields — into a fiduciary RIA platform. This dual-origin governance model, layered atop a full-service wealth management and philanthropic advisory suite, creates an institutional-grade offering that competes for talent and clients alongside private banks and large independent RIAs.

## Sectors

- Healthcare Services
- Consumer Tech
- Enterprise Software
- Private Credit
- Hedge Funds
- Philanthropic / Mission-Related Investing

## Offices

- San Francisco, CA, United States

## People

- Kenneth H. Fields — Co-Founder and Co-Chairman
- James Williams — President and CEO
- Andrew Klingenstein — CEO of the Esther A. and Joseph Klingenstein Fund and Trustee
- Jonathan Roberts — Former Chair of the Board of Governors, Investment Adviser Association

## Questions

### Who runs investment decisions at Klingenstein Fields & Company?

James Williams serves as President and CEO, leading the firm's overall strategy and investment posture. He works alongside Co-Founder and Co-Chairman Kenneth Fields, who represents the founding generation's continuity. The firm's investment committee structure and asset-allocation decisions are overseen internally as an RIA, meaning all portfolio construction must adhere to a fiduciary standard. Jonathan Roberts, former Investment Adviser Association Chair, previously shaped the firm's governance disciplines.

### Does Klingenstein Fields maintain any known co-investor clubs or professional networks?

Yes. President and CEO James Williams is a member of the Young Presidents' Organization (YPO), providing access to a global network of chief executives. The firm also maintains strong ties to the Investment Adviser Association, with Jonathan Roberts having chaired its Board of Governors. Several team members hold CFA charters and participate in CFA Society New York, reinforcing a culture that prizes institutional standards.

### How does the firm's San Francisco office influence its investment posture?

The San Francisco presence, located in the Embarcadero Center, places the firm within reach of Bay Area technology and venture deal flow. While New York remains its headquarters and hub for hedge fund and private credit relationships, the West Coast office supports sourcing for its Consumer Tech and Enterprise Software mandates. This bicoastal footprint allows the advisory to evaluate early-stage and growth-stage tech companies alongside top-tier venture capitalists.

## Related profiles

- [Turim Family Office & Investment Management](https://altss.com/profile/turim-family-office-investment-management)
- [Tinicum Incorporated](https://altss.com/profile/tinicum-incorporated)

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Last updated: 2026-07-06T00:35:16.770Z

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