Assets under management Growth by Quarter
Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.
Total AUM
Total Accounts
10Y AUM Change
Private Funds
Private funds reported by Cion Grosvenor Management, LLC
Loading private fund disclosures…
Employee Growth by Quarter
Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.
Total Employees
Clients per Employee
10Y Employee Change
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%
CION JV SPV 1, LLCDirect owner · Schedule AInterest in CION GROSVENOR MANAGEMENT, LLC
75%+
GCM JV HOLDING, LLCDirect owner · Schedule AInterest in CION GROSVENOR MANAGEMENT, LLC
25% to < 50%
GROSVENOR CAPITAL MANAGEMENT HOLDINGS, LLLPIndirect owner · Schedule BInterest in GCM JV HOLDING, LLC
75%+
MICHAEL J. SACKS REVOCABLE TRUSTIndirect owner · Schedule BInterest in MJS LLC
75%+
GCM GROSVENOR INC.Indirect owner · Schedule BInterest in GROSVENOR CAPITAL MANAGEMENT HOLDINGS, LLLP
75%+
CION JV HOLDINGS, LLCIndirect owner · Schedule BInterest in CION JV SPV 1, LLC
75%+
CION INVESTMENT GROUP, LLCIndirect owner · Schedule BInterest in CION JV HOLDINGS, LLC
75%+
MARK GATTOIndirect owner · Schedule BInterest in GATTO LIVING TRUST
75%+
MICHAEL ADAM REISNERIndirect owner · Schedule BInterest in MICHAEL REISNER REVOCABLE LIVING TRUST
75%+
GROSVENOR HOLDINGS, L.L.C.Indirect owner · Schedule BInterest in GROSVENOR CAPITAL MANAGEMENT HOLDINGS, LLLP
50% to < 75%
WARRENTON CAPITAL CORP.Indirect owner · Schedule BInterest in CION INVESTMENT GROUP, LLC
50% to < 75%
MICHAEL J. SACKS REVOCABLE TRUSTIndirect owner · Schedule BInterest in GROSVENOR HOLDINGS, L.L.C.
25% to < 50%
GATTO LIVING TRUSTIndirect owner · Schedule BInterest in WARRENTON CAPITAL CORP.
25% to < 50%
MICHAEL REISNER REVOCABLE LIVING TRUSTIndirect owner · Schedule BInterest in WARRENTON CAPITAL CORP.
25% to < 50%
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 Cion Grosvenor Management, LLC.
Reported ownership and control details
Form ADV · Filing date 2026-03-31 · Schedules A and B
| # | Owner / person & role | Interest in entity | Reported interest | Control person | Title / status acquired | Source |
|---|---|---|---|---|---|---|
| 1 | MARK GATTOCO-CEO, DIRECTORIndividual | CION GROSVENOR MANAGEMENT, LLC | Less than 5%Code NA | Yes | CO-CEO, DIRECTOR03/2024 | Schedule APDF page 22 |
| 2 | MICHAEL ADAM REISNERCO-CEO, DIRECTORIndividual | CION GROSVENOR MANAGEMENT, LLC | Less than 5%Code NA | Yes | CO-CEO, DIRECTOR03/2024 | Schedule APDF page 22 |
| 3 | STEPHEN ROMANCHIEF COMPLIANCE OFFICERIndividual | CION GROSVENOR MANAGEMENT, LLC | Less than 5%Code NA | Yes | CHIEF COMPLIANCE OFFICER03/2024 | Schedule APDF page 22 |
| 4 | CION JV SPV 1, LLCMEMBERDomestic entity | CION GROSVENOR MANAGEMENT, LLC | 75% or moreCode E | Yes | MEMBER03/2024 | Schedule APDF page 22 |
| 5 | GREGORY MICHAEL SCHILLVICE PRESIDENTIndividual | CION GROSVENOR MANAGEMENT, LLC | Less than 5%Code NA | Yes | VICE PRESIDENT03/2024 | Schedule APDF page 22 |
| 6 | GCM JV HOLDING, LLCMEMBERDomestic entity | CION GROSVENOR MANAGEMENT, LLC | 25% to less than 50%Code C | No | MEMBER03/2024 | Schedule APDF page 22 |
| 7 | PATRICK THOMAS QUINNCHIEF LEGAL OFFICERIndividual | CION GROSVENOR MANAGEMENT, LLC | Less than 5%Code NA | Yes | CHIEF LEGAL OFFICER03/2024 | Schedule APDF page 22 |
| 8 | PAUL DAVID GUERCIOTREASURERIndividual | CION GROSVENOR MANAGEMENT, LLC | Less than 5%Code NA | Yes | TREASURER01/2025 | Schedule APDF page 22 |
| 9 | GROSVENOR CAPITAL MANAGEMENT HOLDINGS, LLLPSOLE MEMBERDomestic entity | GCM JV HOLDING, LLC | 75% or moreCode E | Yes | SOLE MEMBER03/2024 | Schedule BPDF page 23 |
| 10 | GROSVENOR HOLDINGS, L.L.C.LIMITED PARTNERDomestic entity | GROSVENOR CAPITAL MANAGEMENT HOLDINGS, LLLP | 50% to less than 75%Code D | Yes | LIMITED PARTNER12/2005 | Schedule BPDF page 23 |
| 11 | MICHAEL J. SACKS REVOCABLE TRUSTMEMBERDomestic entity | GROSVENOR HOLDINGS, L.L.C. | 25% to less than 50%Code C | Yes | MEMBER11/2001 | Schedule BPDF page 23 |
| 12 | MICHAEL JAY SACKSTRUSTEEIndividual | MICHAEL J. SACKS REVOCABLE TRUST | Percentage not specifiedCode F | Yes | TRUSTEE12/1995 | Schedule BPDF page 23 |
| 13 | MICHAEL JAY SACKSMANAGING MEMBERIndividual | GROSVENOR HOLDINGS, L.L.C. | Percentage not specifiedCode F | Yes | MANAGING MEMBER02/1998 | Schedule BPDF page 23 |
| 14 | MJS LLCMANAGING MEMBERDomestic entity | GROSVENOR HOLDINGS, L.L.C. | Percentage not specifiedCode F | Yes | MANAGING MEMBER07/2005 | Schedule BPDF page 23 |
| 15 | MICHAEL J. SACKS REVOCABLE TRUSTSOLE MEMBERDomestic entity | MJS LLC | 75% or moreCode E | Yes | SOLE MEMBER08/2016 | Schedule BPDF page 23 |
| 16 | GCM GROSVENOR HOLDINGS, LLCSOLE GENERAL PARTNERDomestic entity | GROSVENOR CAPITAL MANAGEMENT HOLDINGS, LLLP | Percentage not specifiedCode F | Yes | SOLE GENERAL PARTNER11/2020 | Schedule BPDF page 23 |
| 17 | GCM GROSVENOR INC.SOLE MEMBERDomestic entity | GROSVENOR CAPITAL MANAGEMENT HOLDINGS, LLLP | 75% or moreCode E | Yes | SOLE MEMBER11/2020 | Schedule BPDF page 23 |
| 18 | CION JV HOLDINGS, LLCSOLE MEMBERDomestic entity | CION JV SPV 1, LLC | 75% or moreCode E | Yes | SOLE MEMBER03/2024 | Schedule BPDF page 23 |
| 19 | CION INVESTMENT GROUP, LLCSOLE MEMBERDomestic entity | CION JV HOLDINGS, LLC | 75% or moreCode E | Yes | SOLE MEMBER12/2023 | Schedule BPDF page 23 |
| 20 | WARRENTON CAPITAL CORP.MEMBER SERIES BDomestic entity | CION INVESTMENT GROUP, LLC | 50% to less than 75%Code D | Yes | MEMBER SERIES B01/2020 | Schedule BPDF page 23 |
| 21 | GATTO LIVING TRUSTSHAREHOLDERDomestic entity | WARRENTON CAPITAL CORP. | 25% to less than 50%Code C | Yes | SHAREHOLDER02/2024 | Schedule BPDF page 23 |
| 22 | MARK GATTOTRUSTEEIndividual | GATTO LIVING TRUST | 75% or moreCode E | Yes | TRUSTEE12/2022 | Schedule BPDF page 23 |
| 23 | MICHAEL REISNER REVOCABLE LIVING TRUSTSHAREHOLDERDomestic entity | WARRENTON CAPITAL CORP. | 25% to less than 50%Code C | Yes | SHAREHOLDER02/2024 | Schedule BPDF page 23 |
| 24 | MICHAEL ADAM REISNERTRUSTEEIndividual | MICHAEL REISNER REVOCABLE LIVING TRUST | 75% or moreCode E | Yes | TRUSTEE02/2024 | Schedule BPDF page 23 |
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 3/31/2026 2:45:03 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.