![Mary Ann Sigler](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Mary Ann Sigler
President at
DIVERSEY HOLDINGS, LTD.
Net worth: 302 175 $ as of 2026-05-30
Profile
Mary Ann Sigler currently works at Urbaser SA, as Chairman, Castle Acquisition Ltd., as Director from 2019, McGraw Hill, Inc., as Director from 2021, and various other companies.
Ms. Sigler also formerly worked at Gtceisu Construcción SA, as Co-Chairman & Co-Chief Executive Officer, Key Energy Services, Inc., as Independent Director from 2016 to 2020, Ryerson, Inc., as Director, and various other companies.
Ms. Sigler received her graduate degree in 1980 from the University of Southern California and undergraduate degree in 1977 from California State University-Fullerton.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-03-18 | 7,500 ( 0% ) | 211 875 $ | 2026-05-30 | |
0% | 2025-07-24 | 7,500 ( 0% ) | 90 300 $ | 2026-05-30 |
Mary Ann Sigler active positions
| Companies | Position | Start |
|---|---|---|
| CISION LTD. | Director/Board Member | 2020-01-30 |
| DIVERSEY HOLDINGS, LTD. | President | - |
| INGRAM MICRO HOLDING CORPORATION | Director/Board Member | 2021-06-30 |
LABL Holding Corp.
 LABL Holding Corp. Financial ConglomeratesFinance Functions as an investment holding company | President | - |
Compass I Ltd.
 Compass I Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Director/Board Member | 2018-02-04 |
Compass II Ltd.
 Compass II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Director/Board Member | 2018-02-04 |
PE Compass Holding III Ltd.
 PE Compass Holding III Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Director/Board Member | 2018-02-04 |
PE Compass Holding II Ltd.
 PE Compass Holding II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Director/Board Member | 2018-02-04 |
Compass Bidco II Ltd.
 Compass Bidco II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Director/Board Member | 2018-02-04 |
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Former positions of Mary Ann Sigler
| Companies | Position | End |
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Training of Mary Ann Sigler
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
93
1st degree connections
62
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 62 |
|---|---|
Key Energy Services, Inc.
 Key Energy Services, Inc. Oilfield Services/EquipmentIndustrial Services Provides oil and gas well drilling & completion services | Industrial Services |
Ryerson, Inc.
 Ryerson, Inc. SteelNon-Energy Minerals Engages in the processing and distribution of metal products | Non-Energy Minerals |
Ernst & Young LLP
 Ernst & Young LLP Miscellaneous Commercial ServicesCommercial Services Provides assurance, auditing, tax, legal, technology and consulting & managed services | Commercial Services |
Commercial Barge Line Co.
 Commercial Barge Line Co. Marine ShippingTransportation Provides inland marine transportation services | Transportation |
Ryerson Holding Corp.
 Ryerson Holding Corp. SteelNon-Energy Minerals Operates as a holding company, which through its subsidiaries engages in the processing and distribution of metals | Non-Energy Minerals |
Gtceisu Construcción SA
 Gtceisu Construcción SA Engineering & ConstructionIndustrial Services Provides precast piles and engineering services | Industrial Services |
University of Southern California
 University of Southern California Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
The American Institute of Certified Public Accountants
 The American Institute of Certified Public Accountants Miscellaneous Commercial ServicesCommercial Services Association of accountants | Commercial Services |
Castle Acquisition Ltd.
 Castle Acquisition Ltd. Financial ConglomeratesFinance Led by WestLB, the Green brothers, Robert Tchenguiz, Odean Management, Rotch Property Group, and Entertainment Film Distributors | Finance |
Platinum Equity Advisors LLC
 Platinum Equity Advisors LLC Investment ManagersFinance Platinum Equity Advisors invests in public and private companies located across the globe primarily in North America with an enterprise value of USD 100 million - USD 10 billion and EBITDA of USD 15- 75 million. The firm focuses across a broad range of sectors and industries. It provides financing in the form of equity and debt for acquisition, buyout, corporate divestitures, public-to-private transactions, private transactions, special situations and growth capital requirements. | Finance |
California State University-Fullerton
 California State University-Fullerton Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Platinum Equity LLC
 Platinum Equity LLC Financial ConglomeratesFinance Operates as an investment firm | Finance |
Elevate Textiles, Inc.
 Elevate Textiles, Inc. TextilesProcess Industries Manufactures and markets textile products | Process Industries |
California Society of Certified Public Accountants | Commercial Services |
Urbaser SA
 Urbaser SA Environmental ServicesIndustrial Services Provides recycling, waste treatment and disposal services | Industrial Services |
Husky Injection Molding Systems, Inc.
 Husky Injection Molding Systems, Inc. Miscellaneous ManufacturingProducer Manufacturing Designs and manufactures injection molding equipment | Producer Manufacturing |
NEW SOUTH Access & Environmental Solutions LLC
 NEW SOUTH Access & Environmental Solutions LLC Miscellaneous Commercial ServicesCommercial Services Provides project management, temporary road, power line and pipeline construction services | Commercial Services |
Sensis Holding Ltd.
 Sensis Holding Ltd. Financial ConglomeratesFinance Provides investment services | Finance |
Installation Services Holdings LLC
 Installation Services Holdings LLC Financial ConglomeratesFinance Functions as an investment holding company | Finance |
SCRS Holding Corp.
 SCRS Holding Corp. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Cision Ltd.
 Cision Ltd. Packaged SoftwareTechnology Services Provides consumer and media intelligence, engagement & communication solutions | Technology Services |
FT Holding II Ltd.
 FT Holding II Ltd. Financial ConglomeratesFinance Operates as an investment holding company | Finance |
Pioneer IV Ltd. (United Kingdom)
 Pioneer IV Ltd. (United Kingdom) Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Game Taco, Inc.
 Game Taco, Inc. Internet Software/ServicesTechnology Services Operates as an online skill-based game tournament platform | Technology Services |
Compass V Ltd.
 Compass V Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Compass III Ltd.
 Compass III Ltd. Financial ConglomeratesFinance Functions as investment holding company | Finance |
Longitude Holding III Ltd.
 Longitude Holding III Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Platinum Equity Advisors International (UK) Ltd.
 Platinum Equity Advisors International (UK) Ltd. Investment ManagersFinance Functions as an alternative investment manager | Finance |
PE QIQ Holding Ltd.
 PE QIQ Holding Ltd. Wholesale DistributorsDistribution Services Operates as a holding company through its subsidiaries distributes office equipment | Distribution Services |
Project Pearl Holding Ltd.
 Project Pearl Holding Ltd. Miscellaneous ManufacturingProducer Manufacturing Operates as holding company whose subsidiaries manufactures and supplies engineered plastic products | Producer Manufacturing |
Project Quill Holding Ltd.
 Project Quill Holding Ltd. Wholesale DistributorsDistribution Services Operates as holding company whose subsidiaries distributes goods | Distribution Services |
PE QIQ Holding II Ltd.
 PE QIQ Holding II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE QIQ Holding III Ltd.
 PE QIQ Holding III Ltd. Wholesale DistributorsDistribution Services Operates as a holding company whose subsidiaries sells office goods | Distribution Services |
PE Pioneer Holding II Ltd.
 PE Pioneer Holding II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Titan Holding Ltd.
 PE Titan Holding Ltd. Industrial MachineryProducer Manufacturing Manufactures engineered manufacturing systems for plastic injection molding equipment industry | Producer Manufacturing |
Pioneer I Ltd.
 Pioneer I Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Pioneer III Ltd.
 Pioneer III Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Pioneer Holding III Ltd.
 PE Pioneer Holding III Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Compass Bidco II Ltd.
Compass Bidco II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Compart Systems Ltd.
 Compart Systems Ltd. Oilfield Services/EquipmentIndustrial Services Functions as a holding company whose subsidiaries manufactures and trades gas delivery systems and plastic solution products | Industrial Services |
LABL Holding Corp.
LABL Holding Corp. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Compass I Ltd.
Compass I Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Compass Holding III Ltd.
PE Compass Holding III Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Compass Holding II Ltd.
PE Compass Holding II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Compass II Ltd.
Compass II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Sensis Holding II Ltd.
 Sensis Holding II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Titan Holding II Ltd.
 PE Titan Holding II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Titan Holding III Ltd.
 PE Titan Holding III Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
DMT Solutions Germany GmbH
 DMT Solutions Germany GmbH Wholesale DistributorsDistribution Services Wholesales photographic and optical products, electrical household appliances and entertainment electronics | Distribution Services |
Diversey Holdings Ltd. (Cayman Islands)
 Diversey Holdings Ltd. (Cayman Islands) Household/Personal CareConsumer Non-Durables Provides cleaning, polishing and sanitation preparations services | Consumer Non-Durables |
Imola Acquisition Corp.
 Imola Acquisition Corp. Financial ConglomeratesFinance Provides investment services | Finance |
LifeScan Holding Ltd.
 LifeScan Holding Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Majordrive Holdings IV LLC
 Majordrive Holdings IV LLC Trucks/Construction/Farm MachineryProducer Manufacturing Operates as a holding company whose subsidiaries manufactures golf carts and low-speed vehicles | Producer Manufacturing |
DMT Solutions U.K. Ltd.
 DMT Solutions U.K. Ltd. Industrial MachineryProducer Manufacturing Manufactures special-purpose machinery | Producer Manufacturing |
PE Castle Holding III Ltd.
 PE Castle Holding III Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Pagani Holding Ltd.
 PE Pagani Holding Ltd. Electronic Production EquipmentElectronic Technology Operates as a holding company through its subsidiaries manufactures electronic products | Electronic Technology |
PE Longitude Holding Ltd.
 PE Longitude Holding Ltd. Air Freight/CouriersTransportation Operates as a holding company with interest in providing customer brokerage, compliance and freight forwarding services | Transportation |
PE Longitude Holding II Ltd.
 PE Longitude Holding II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Longitude Holding III Ltd.
 PE Longitude Holding III Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
PE Pagani Holding II Ltd.
 PE Pagani Holding II Ltd. Financial ConglomeratesFinance Functions as an investment holding company | Finance |
Compass Bidco ApS
 Compass Bidco ApS Financial ConglomeratesFinance Operates as a non-financial holding company | Finance |
Ingram Micro Holding Corp.
 Ingram Micro Holding Corp. Information Technology ServicesTechnology Services Provides AI powered B2B technology platform | Technology Services |
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