Klingenstein, Fields & Co., L.P.
- Regulatory AUM
- $4.7B
- Discretionary
- $4.0B
- Clients
- 1,309
- Avg AUM / client
- $3.6M
- Accounts
- 1,309
- Employees
- 39
AUM over time
Annual snapshots from Form ADV filings · as of Jul 28, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 260 | $66.8M | 1.42% |
| High net worth individuals | 977 | $3.9B | 83.1% |
| Pooled investment vehicles (non-investment companies) | 12 | $172M | 3.65% |
| Pension and profit sharing plans | 2 | $2.0M | 0.04% |
| Charitable organizations | 41 | $445M | 9.48% |
| Corporations and other businesses | 17 | $110M | 2.34% |
Private funds (13)
Reported in Form ADV Section 7.B.(1), filing of Jul 2024 · $379M combined gross assets
| Fund | Type | Domicile | Gross assets | Owners |
|---|---|---|---|---|
| Wertheim Ventures I, Llc | Private Equity Fund | Delaware | $288M | 26 |
| Klingenstein Fields Venture Fund, L.P. | Venture Capital Fund | Delaware | $27.9M | 44 |
| Klingenstein Fields Venture Fund Ii, L.P. | Venture Capital Fund | Delaware | $21.7M | 40 |
| K Investments Viii Llc | Venture Capital Fund | Delaware | $10.8M | 31 |
| K Investments Vii, Llc | Private Equity Fund | Delaware | $7.8M | 21 |
| Klingenstein Fields Venture Fund Iii, L.P. | Venture Capital Fund | Delaware | $6.1M | 32 |
| Wertheim Ticket Fund, Llc | Private Equity Fund | Delaware | $6.1M | 31 |
| K Investments Vi, Llc | Private Equity Fund | Delaware | $4.9M | 39 |
| K Investments Iv, Llc | Private Equity Fund | Delaware | $2.7M | 40 |
| K Investments V, Llc | Private Equity Fund | Delaware | $1.7M | 40 |
| K Investments Iii, Llc | Private Equity Fund | Delaware | $773K | 44 |
| Fk Investments I, Llc | Private Equity Fund | Delaware | $691K | 12 |
| K Investments Ii, Llc | Private Equity Fund | Delaware | $34.4K | 38 |
Retirement plan clients
Plans that reported this firm as an investment service provider on Form 5500 Schedule C.
| Plan | Location | Plan year |
|---|---|---|
| United Airlines Pilot Retirement Account Plan United Airlines, Inc. | 2024 |
People (9)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Jonathan Roberts | Limited Partner | CFA Chartered Investment Counselor | Mar 2005 (21y) | 5% – 10% |
| Chambers, Maria | Chief Compliance Officer | Jan 2017 (10y) | Less than 5% | |
| Laurence Ernest Ach | Limited Partner | Chartered Investment Counselor | Aug 2021 (5y) | 5% – 10% |
| Kenneth David Pollinger | Limited Partner, Chairman, Co Chief Executive Officer | Sep 2021 (5y) | 10% – 25% | |
| James Wagner Fields | Limited Partner, Co Chief Executive Officer, President | Sep 2021 (5y) | 10% – 25% | |
| Curry, Susan, H. | Limited Partner And Chief Operating Officer | Jan 2022 (5y) | 5% – 10% | |
| Fields, Kenneth, Harvey | Limited Partner, Executive Chairman | Jan 2022 (5y) | 10% – 25% | |
| Lee, Yuh Yng | Limited Partner And Chief Financial Officer | Jan 2022 (5y) | Less than 5% | |
| David Beck Raphael | Registered representative | Mar 2026 (0y) |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Joseph Klingenstein Trust #2 Dated 7/25/74 Fbo Frederick A. Klingenstein And His Issue, Fak, Khf & Kdp Trustees | Limited Partner | Aug 2020 | A | 10% – 25% |
| Klingenstein Management Corporation | General Partner | Aug 2020 | A | Less than 5% |
Undisclosed: 0% – 45% of the firm is not attributable from the filed Schedule A bands.
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Private funds (13, $379M gross assets)
| Fund | Type | Gross assets | Min. investment | Owners |
|---|---|---|---|---|
| Wertheim Ventures I, Llc | Private Equity Fund | $288M | $5.0K | 26 |
| Klingenstein Fields Venture Fund, L.P. | Venture Capital Fund | $27.9M | $250K | 44 |
| Klingenstein Fields Venture Fund Ii, L.P. | Venture Capital Fund | $21.7M | $250K | 40 |
| K Investments Viii Llc | Venture Capital Fund | $10.8M | $50.0K | 31 |
| K Investments Vii, Llc | Private Equity Fund | $7.8M | $50.0K | 21 |
| Klingenstein Fields Venture Fund Iii, L.P. | Venture Capital Fund | $6.1M | $250K | 32 |
| Wertheim Ticket Fund, Llc | Private Equity Fund | $6.1M | $5.0K | 31 |
| K Investments Vi, Llc | Private Equity Fund | $4.9M | $50.0K | 39 |
| K Investments Iv, Llc | Private Equity Fund | $2.7M | $50.0K | 40 |
| K Investments V, Llc | Private Equity Fund | $1.7M | $50.0K | 40 |
| K Investments Iii, Llc | Private Equity Fund | $773K | $100K | 44 |
| Fk Investments I, Llc | Private Equity Fund | $691K | $100K | 12 |
| K Investments Ii, Llc | Private Equity Fund | $34.4K | $100K | 38 |
From Form ADV Section 7.B private fund reporting.
Retirement plans served (1)
| Plan | Sponsor | Participants | Plan assets | As of |
|---|---|---|---|---|
| United Airlines Pilot Retirement Account Plan | United Airlines, Inc. | 17,444 | $16.8B | 01/01/2024 |
From Form 5500 service-provider disclosures.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 05/18/2026 | 3.5 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
- • Fixed fees
- • Performance-based fees
Services
- • Financial planning services
- • Portfolio management for individuals/small businesses
- • Portfolio management for pooled investment vehicles
- • Portfolio management for businesses/institutional clients
- • Selection of other advisers
Custody
Reported custodians
- Charles Schwab & Co. $2.7B (57% of AUM) May 2026
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports having custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Jul 28, 2026.
View current Form ADV (SEC/IAPD) ↗