Firm profile

Integral Ils Ltd..

HAMILTON, BermudaCRD 310727Registration Status: ApprovedEffective since December 16, 2022SEC # 801-120129Latest ADV March 17, 2026

Integral Ils Ltd. is an SEC registered investment adviser with a primary office location in Hamilton, Bermuda. Its latest Form ADV filing, dated March 17, 2026, reports $3.8B in regulatory assets under management, 15 employees, 1 office, and 10 accounts.

Assets Under Management
$3.8B
Employees
15
Offices
1 office
Total Clients
10

Associated firm names

1 name listed
  • INTEGRAL ILS LTD.

Leadership

4 roles identified
CEOLixin Zeng
CCORichard J. Lowther
COORichard J. Lowther

Advisory services offered

1 types reported
Portfolio management for pooled investment vehicles

Fee models offered

2 types reported
Asset based fees
Other fee arrangements

Offices & Contact

Primary office

HAMILTON, Bermuda

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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.

Bermuda

HAMILTONPrimary office

1 office records listed · 1 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$3.8Bas of March 17, 2026
Discretionary100.0%
$3.8B
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%
10

Assets under management Growth by Quarter

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

Total AUM$3.8B
Total Accounts10
10Y AUM Change+$3.8B

Private Funds

Private funds reported by Integral Ils Ltd..

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Employee Growth by Quarter

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

Total Employees15
Clients per Employee1:1
10Y Employee Change+7 (+87.5%)

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%
LIXIN ZENGDirect owner · Schedule AInterest in INTEGRAL ILS LTD.
25% to < 50%
RICHARD JOHN LOWTHERDirect owner · Schedule AInterest in INTEGRAL ILS LTD.
10% to < 25%
AMWINS VENTURES, LLCDirect owner · Schedule AInterest in INTEGRAL ILS LTD.
10% to < 25%
TRANSATLANTIC HOLDINGS INC.Direct owner · Schedule AInterest in INTEGRAL ILS LTD.
10% to < 25%
AMWINS HOLDINGS, LLCIndirect owner · Schedule BInterest in AMWINS VENTURES, LLC
75%+
AMWINS GROUP, LLCIndirect owner · Schedule BInterest in AMWINS HOLDINGS, LLC
75%+
AMWINS GROUP, INC.Indirect owner · Schedule BInterest in AMWINS GROUP, LLC
75%+
AMERICAN WHOLESALE INSURANCE HOLDING COMPANY, LLCIndirect owner · Schedule BInterest in AMWINS GROUP, INC.
75%+
ALLEGHANY CORPORATIONIndirect owner · Schedule BInterest in TRANSATLANTIC HOLDINGS INC.
75%+
BERKSHIRE HATHAWAY INC.Indirect owner · Schedule BInterest in ALLEGHANY CORPORATION
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 Integral Ils Ltd...

Reported ownership and control details

Form ADV · Filing date 2026-03-17 · Schedules A and B

13 entries
#Owner / person & roleInterest in entityReported interestControl personTitle / status acquiredSource
1LIXIN ZENGMANAGING PARTNER, CIO, CEOIndividualINTEGRAL ILS LTD.25% to less than 50%Code CYesMANAGING PARTNER, CIO, CEO11/2020Schedule APDF page 65
2RICHARD JOHN LOWTHERMANAGING PARTNER, CHIEF COMPLIANCE OFFICER, CHIEF OPERATING OFFICERIndividualINTEGRAL ILS LTD.10% to less than 25%Code BYesMANAGING PARTNER, CHIEF COMPLIANCE OFFICER, CHIEF OPERATING OFFICER11/2020Schedule APDF page 65
3AMWINS VENTURES, LLCOWNERDomestic entityINTEGRAL ILS LTD.10% to less than 25%Code BNoOWNER01/2021Schedule APDF page 65
4TRANSATLANTIC HOLDINGS INC.OWNERDomestic entityINTEGRAL ILS LTD.10% to less than 25%Code BNoOWNER01/2024Schedule APDF page 65
5ADRIAAN JACOBUS VAN DER MERWEEXECUTIVE OFFICERIndividualINTEGRAL ILS LTD.Less than 5%Code NAYesEXECUTIVE OFFICER10/2020Schedule APDF page 65
6WILEY HOWARD COOPERDIRECTORIndividualINTEGRAL ILS LTD.Less than 5%Code NANoDIRECTOR12/2021Schedule APDF page 65
7MICHAEL CHARLES TORREDIRECTORIndividualINTEGRAL ILS LTD.Less than 5%Code NANoDIRECTOR01/2024Schedule APDF page 65
8AMWINS HOLDINGS, LLCOWNERDomestic entityAMWINS VENTURES, LLC75% or moreCode EYesOWNER09/2019Schedule BPDF page 66
9AMWINS GROUP, LLCOWNERDomestic entityAMWINS HOLDINGS, LLC75% or moreCode EYesOWNER05/2004Schedule BPDF page 66
10AMWINS GROUP, INC.OWNERDomestic entityAMWINS GROUP, LLC75% or moreCode EYesOWNER06/2012Schedule BPDF page 66
11AMERICAN WHOLESALE INSURANCE HOLDING COMPANY, LLCOWNERDomestic entityAMWINS GROUP, INC.75% or moreCode EYesOWNER06/2012Schedule BPDF page 66
12ALLEGHANY CORPORATIONOWNERDomestic entityTRANSATLANTIC HOLDINGS INC.75% or moreCode EYesOWNER03/2012Schedule BPDF page 66
13BERKSHIRE HATHAWAY INC.OWNERDomestic entityALLEGHANY CORPORATION75% or moreCode EYesOWNER10/2022Schedule BPDF page 66

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 3/17/2026 2:29:20 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.