Firm profile

Pantheon

LONDON, United KingdomCRD 161631Registration Status: ApprovedEffective since February 12, 2026SEC # 801-135040Latest ADV July 13, 2026

Pantheon is an SEC registered investment adviser organized as a limited liability partnership with a primary office location in London, United Kingdom. Its latest Form ADV filing, dated July 13, 2026, reports $4.6B in regulatory assets under management, 406 employees, 3 offices, and 24 accounts.

Assets Under Management
$4.6B
Employees
406
Offices
3 offices
Total Clients
24

Associated firm names

3 names listed
  • PANTHEON
  • PANTHEON VENTURES (UK), LLP
  • PANTHEON VENTURES (UK) LLP

Leadership

2 roles identified
CEOKathryn M. Leaf
CFODean A. Maines

Advisory services offered

2 types reported
Portfolio management for businesses
Portfolio management for pooled investment vehicles

Fee models offered

3 types reported
Asset based fees
Fixed fees
Performance-based fees

Offices & Contact

Primary office

LONDON, United Kingdom

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Primary office regionOther reported regions

Shading shows states and countries with reported offices. Cities are listed below; shading does not indicate service coverage.

United Kingdom

LONDONPrimary office

California

SAN FRANCISCO

New York

NEW YORK

3 office records listed · 3 total offices reported. Counts can use different reporting dates. SEC filers may list only their largest 25 additional offices.

Contact and digital presence

ADV profile links

Regulatory Assets Under Management Breakdown

Total regulatory assets under management$4.6Bas of July 13, 2026
Discretionary100.0%
$4.6B
100% of total RAUM100.0%
Non-discretionary0.0%
$0
0% of total RAUM0.0%
All regulatory assets under management are discretionary.

Client Coverage Demographics

Top client segmentPooled Investment Vehicles represent 100.0% of total clients.
Top client categories% of clientsClients
1
Pooled Investment Vehicles
100.0%
24

Assets under management Growth by Quarter

Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.

Total AUM$4.6B
Total Accounts24
10Y AUM Change+$3.1B (+212.5%)

Private Funds

Private funds reported by Pantheon

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Employee Growth by Quarter

Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.

Total Employees406
Clients per Employee0:1
10Y Employee Change+10 (+2.5%)

Historical AUM and employee figures reflect available SEC Form ADV filings under this CRD. Filing gaps may reflect registration status changes, dormant periods, state registration periods, firm restructuring, or other reporting changes. Rialytix does not interpolate missing periods.


Ownership

Reported direct and indirect ownership ranges

Each range applies to a separate reported relationship and should not be added together.

Reported ownership ranges

Highlighted bands show the percentage range reported in Form ADV.

0%25%50%75%100%
PANTHEON VENTURES LIMITEDDirect owner · Schedule AInterest in PANTHEON
75%+
AFFILIATED MANAGERS GROUP, INC.Indirect owner · Schedule BInterest in AMG NEW YORK HOLDINGS CORP.
75%+
AMG PLYMOUTH UK HOLDINGS (1) LIMITEDIndirect owner · Schedule BInterest in PANTHEON HOLDINGS LIMITED
75%+
PANTHEON HOLDINGS LIMITEDIndirect owner · Schedule BInterest in PANTHEON VENTURES LIMITED
75%+
AMG NEW YORK HOLDINGS CORP.Indirect owner · Schedule BInterest in AMG UK HOLDINGS LIMITED
75%+
AMG UK HOLDINGS LIMITEDIndirect owner · Schedule BInterest in AMG PLYMOUTH UK HOLDINGS (1) LIMITED
75%+

Bars represent the reported range at that individual ownership step, not an estimated percentage of the advisory firm. Indirect relationships may refer to intermediate entities rather than directly to Pantheon.

Reported ownership and control details

Form ADV · Filing date 2026-07-13 · Schedules A and B

10 entries
#Owner / person & roleInterest in entityReported interestControl personTitle / status acquiredSource
1PANTHEON VENTURES LIMITEDLIMITED PARTNERForeign entityPANTHEON75% or moreCode EYesLIMITED PARTNER06/2010Schedule APDF page 100
2JOHN LLEWELLYN MORGANGENERAL COUNSELIndividualPANTHEONLess than 5%Code NAYesGENERAL COUNSEL07/2010Schedule APDF page 100
3DEAN AARON MAINESCHIEF FINANCIAL OFFICERIndividualPANTHEONLess than 5%Code NAYesCHIEF FINANCIAL OFFICER01/2023Schedule APDF page 100
4Kathryn Margaret LeafCHIEF EXECUTIVE OFFICERIndividualPANTHEONLess than 5%Code NAYesCHIEF EXECUTIVE OFFICER01/2025Schedule APDF page 100
5CHRISTOPHER JOHN BANKSMANAGING DIRECTOR, GLOBAL HEAD OF COMPLIANCEIndividualPANTHEONLess than 5%Code NAYesMANAGING DIRECTOR, GLOBAL HEAD OF COMPLIANCE12/2025Schedule APDF page 100
6AFFILIATED MANAGERS GROUP, INC.CORPORATE PARENTDomestic entityAMG NEW YORK HOLDINGS CORP.75% or moreCode EYesCORPORATE PARENT12/2000Schedule BPDF page 101
7AMG PLYMOUTH UK HOLDINGS (1) LIMITEDOWNERForeign entityPANTHEON HOLDINGS LIMITED75% or moreCode EYesOWNER06/2010Schedule BPDF page 101
8PANTHEON HOLDINGS LIMITEDOWNERForeign entityPANTHEON VENTURES LIMITED75% or moreCode EYesOWNER07/1988Schedule BPDF page 101
9AMG NEW YORK HOLDINGS CORP.SHAREHOLDERDomestic entityAMG UK HOLDINGS LIMITED75% or moreCode EYesSHAREHOLDER06/2014Schedule BPDF page 101
10AMG UK HOLDINGS LIMITEDSHAREHOLDERForeign entityAMG PLYMOUTH UK HOLDINGS (1) LIMITED75% or moreCode EYesSHAREHOLDER12/2016Schedule BPDF page 101

Less than 5% may include zero. Code F identifies a role without specifying a percentage. Reported interests may overlap and may not include every owner. Total indirect ownership is not calculated.

Compliance & Disclosures

Filing dated 7/13/2026 3:58:55 PM

Responses were selected by the RIA in its filing. Questions are shortened for readability; “you” refers to the reporting firm, and some questions also cover advisory affiliates.

RIA or supervised-person involvementThe RIA reported that none of the events below involve the firm or its supervised persons.RIA responseNo
AFelonies2 No

In the past ten years, have you or any advisory affiliate:

  • A1Been convicted of or pleaded guilty or no contest to a felony?No
  • A2Been charged with a felony?No
BMisdemeanors2 No

In the past ten years, have you or any advisory affiliate:

  • B1Been convicted of or pleaded guilty or no contest to a misdemeanor involving investments, an investment-related business, fraud, false statements or omissions, wrongful taking of property, bribery, perjury, forgery, counterfeiting, or extortion?No
  • B2Been charged with a misdemeanor of the kind listed above?No
CSEC or CFTC actions5 No

Has the SEC or CFTC ever:

  • C1Found you or an advisory affiliate made a false statement or omission?No
  • C2Found you or an advisory affiliate violated SEC or CFTC regulations or statutes?No
  • C3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • C4Entered an order against you or an advisory affiliate in connection with investment-related activity?No
  • C5Imposed a civil money penalty on you or an advisory affiliate, or ordered you or an advisory affiliate to cease and desist from any activity?No
DOther regulatory actions5 No

Has any other federal regulatory agency, state regulatory agency, or foreign financial regulatory authority ever:

  • D1Found you or an advisory affiliate made a false statement or omission, or was dishonest, unfair, or unethical?No
  • D2Found you or an advisory affiliate violated investment-related regulations or statutes?No
  • D3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • D4In the past ten years, entered an order against you or an advisory affiliate in connection with investment-related activity?No
  • D5Denied, suspended, or revoked your or an advisory affiliate’s registration or license, or otherwise prevented association with an investment-related business or restricted activities?No
ESelf-regulatory organization actions4 No

Has a self-regulatory organization or commodities exchange ever:

  • E1Found you or an advisory affiliate made a false statement or omission?No
  • E2Found you or an advisory affiliate violated its rules, other than a violation designated as a minor rule violation under an SEC-approved plan?No
  • E3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • E4Disciplined you or an advisory affiliate by expulsion, suspension, barring association with other members, or otherwise restricting activities?No
FProfessional authorizations1 No
  • FHas an authorization to act as an attorney, accountant, or federal contractor granted to you or an advisory affiliate ever been revoked or suspended?No
GPending regulatory proceedings1 No
  • GAre you or any advisory affiliate now the subject of a regulatory proceeding that could result in a “Yes” answer to any part of C, D, or E?No
HCivil judicial actions and proceedings4 No

(1) Court actions

Has a domestic or foreign court:

  • H(1)(a)In the past ten years, enjoined you or an advisory affiliate in connection with investment-related activity?No
  • H(1)(b)Found that you or an advisory affiliate violated investment-related statutes or regulations?No
  • H(1)(c)Dismissed, pursuant to a settlement agreement, an investment-related civil action brought against you or an advisory affiliate by a state or foreign financial regulatory authority?No

(2) Pending civil proceedings

  • H(2)Are you or any advisory affiliate now the subject of a civil proceeding that could result in a “Yes” answer to any part of H(1)?No

* Metrics are based on the latest available data, including Form ADV filings, brochures, and relationship summaries pulled from the SEC IAPD, and may be subject to change. Learn what is included in the Rialytix data. Please refer to the firm's official disclosures for the most accurate information using their CRD number. This is not investment advice.