PHILIPPE WEIGERSTORFER

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Sonoma Pharmaceuticals, Inc.

Filing Date Source Excerpt
2019-04-22 Philippe Weigerstorfer (7) Director
2019-07-29 Education: Degree in Business Administration and Economics from University Basel; Minor in Law from University Basel; Special Knowledge, Skills, and Abilities: Pharmaceutical Background, International Business, Sales and Marketing.
2020-07-29 Education: Degree in Business Administration and Economics from University Basel, Minor in Law from University Basel. Special Knowledge, Skills, and Abilities: Pharmaceutical Background, International Business, Sales and Marketing.
2021-07-29 Degree in Business Administration and Economics from University Basel; Minor in Law from University Basel; extensive pharmaceutical and international business experience.
2022-07-22 Mr. Weigerstorfer has served on our Board of Directors since September 2018. He is the owner and managing director of Weigerstorfer New Venture LLC (GmbH) Switzerland. Since January 2020, he serves as the chairman of the board of Onycho Pharma Pte. Ltd., Singapore. From 2011 until the end of 2017, Mr. Weigerstorfer was the managing director of Vifor Pharma Asia Pacific Pte Ltd, a company of the Vifor Pharma Group, which specializes in treatment and prevention of iron deficiencies and also contains an infectious diseases/OTX product portfolio. As managing director, Mr. Weigerstorfer was responsible for managing the activities of Vifor Asia Pacific in Singapore and overseeing the Asia Pacific region. He worked at Vifor Pharma since 2008. From 2000 to 2016, he worked at Galencia Ltd. where he rose to the position of Special Advisor to the executive Chairman of Galencia, helping insure corporate growth through acquisition of pharmaceutical companies, licenses, and projects. From 1996 to 1999 he worked at Novartis Pharma Ltd. where he headed the corporate marketing for the “dermatology and others” area and helped Novartis to become one of the leading dermatology company in the world. Previous to that, Mr. Weigerstorfer worked with Sandoz Pharma AG in many different roles including as head of the dermatology and cardiovascular business unit.
2023-07-27 Mr. Weigerstorfer has served on our Board of Directors since September 2018. He is the owner and managing director of Weigerstorfer New Venture LLC (GmbH) Switzerland... Education: Degree in Business Administration and Economics from University Basel, Minor in Law from University Basel.
2024-07-01 Mr. Weigerstorfer has served on our Board of Directors since September 2018. He is the owner and managing director of Weigerstorfer New Venture LLC (GmbH) Switzerland. From 2011 until the end of 2017, Mr. Weigerstorfer was the managing director of Vifor Pharma Asia Pacific Pte Ltd, a company of the Vifor Pharma Group... Education: Degree in Business Administration and Economics from University Basel, Minor in Law from University Basel.

Source material: SEC submissions metadata and DEF 14A proxy filings from EDGAR. Last updated: 2026-03-19