Brian Posner
Director/Board Member at ARCH CAPITAL GROUP LTD.
Net worth: 11 M $ as of 2024-03-30
Profile
Brian S.
Posner is the founder of Hygrove Partners LLC (founded in 2000) and Point Rider Group LLC (founded in 2008).
He is currently an Independent Director at Arch Capital Group Ltd.
(since 2010), a Trustee at AQR Funds, Northwestern University, and Northwestern University Clinical & Translational Sciences Inst.
He is also a Member-Supervisory Board at Biogen GmbH (since 2008).
His former positions include President, CEO & Chief Investment Officer at ClearBridge Investments LLC (2005-2008), Chairman at Bioverativ, Inc. (2017-2018), Director at Sotheby's Holdings, Inc. (2000-2003), and Independent Director at Biogen, Inc. (2008-2022).
He has also held positions at Anadys Pharmaceuticals, Inc., BG Medicine, Inc., RiverPark Funds Trust, Biogen Idec New Ventures, Inc., Fidelity Management & Research Co. LLC, Warburg Pincus Asset Management, Inc., and Credit Suisse Asset Management LLC.
Mr. Posner received his undergraduate degree from Northwestern University in 1983 and his MBA from The University of Chicago Booth School of Business in 1987.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
ARCH CAPITAL GROUP LTD.
0.03% | 2024-03-12 | 117,085 ( 0.03% ) | 11 M $ | 2024-03-30 |
| 2023-05-03 | 4,000 ( inf% ) | 369 760 $ | 2024-03-30 | |
| 2023-05-03 | 3,000 ( 0.02% ) | 70 890 $ | 2024-03-30 |
Brian Posner active positions
| Companies | Position | Start |
|---|---|---|
| ARCH CAPITAL GROUP LTD. | Director/Board Member | 2010-11-03 |
| Point Rider Group LLC | Founder | 2008-02-29 |
Biogen GmbH
 Biogen GmbH Pharmaceuticals: MajorHealth Technology Part of Biogen, Inc., Biogen GmbH is a pioneer in the field of neuroscience since 1978. The private company is based in Ismaning, Germany. Biogen focuses on research in therapeutic areas with a strong emphasis on difficult-to-treat diseases. The German company was founded in 1978 by Charles Weissman, Kenneth Murray, Heinz Schaller, Phillip Sharp, Walter Gilbert. The CEO is Michel Pericles Vounatsos. | Director/Board Member | 2007-12-31 |
| AQR Funds | Director/Board Member | - |
Northwestern University
 Northwestern University Other Consumer ServicesConsumer Services Northwestern University is a private institution founded in 1851 to serve the Northwest Territory, an area that now includes the states of Ohio, Indiana, Illinois, Michigan, Wisconsin and parts of Minnesota. Northwestern has three campuses | Director/Board Member | - |
| Northwestern University Clinical & Translational Sciences Inst | Director/Board Member | - |
Former positions of Brian Posner
| Companies | Position | End |
|---|---|---|
| BIOGEN INC. | Director/Board Member | 2022-05-14 |
| BIOVERATIV INC | Chairman | 2018-03-07 |
| BG MEDICINE, INC. | Director/Board Member | 2015-04-14 |
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Training of Brian Posner
| Northwestern University | Undergraduate Degree |
| The University of Chicago Booth School of Business | Masters Business Admin |
Experiences
Positions held
Connections
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Listed companies | 3 |
|---|---|
| ARCH CAPITAL GROUP LTD. | Finance |
| BIOGEN INC. | Health Technology |
| BG MEDICINE, INC. | Health Technology |
| Private companies | 14 |
|---|---|
Fidelity Management & Research Co. LLC
 Fidelity Management & Research Co. LLC Investment ManagersFinance Fidelity Management & Research Co. (FMR) is a SEC-registered investment advisor headquartered in Boston, Massachusetts. The firm was founded in 1946 and is a subsidiary of FMR LLC, also known as Fidelity Investments. FMR provides investment supervisory services, which include sub-advisory services, to Fidelity's family of mutual funds and exchange-traded funds, qualified tuition programs, privately offered unregistered investment funds, separately managed account clients, and various other institutional accounts. | Finance |
Sotheby's Holdings, Inc.
 Sotheby's Holdings, Inc. Specialty StoresRetail Trade Sotheby's Holdings, Inc. is the parent company of Sotheby's worldwide live auction businesses, art-related financing and real estate brokerage activities. The Company operates in 34 countries, with principal salesrooms located in New York and London. The Company also regularly conducts auctions in 13 other salesrooms around the world, including Australia, Hong Kong, France, Italy, the Netherlands, Switzerland and Singapore. Sotheby's Holdings was founded in 1744 and is headquartered in Bloomfield Hills, MI. | Retail Trade |
| Warburg Pincus Asset Management, Inc. | Finance |
Credit Suisse Asset Management LLC
 Credit Suisse Asset Management LLC Investment ManagersFinance Founded in 1999, Credit Suisse Asset Management LLC (CSAM) is a registered investment advisor headquartered in New York City. The firm is an indirect wholly-owned subsidiary of Credit Suisse Group AG (NYSE: CS), a publicly owned foreign bank holding company based in Switzerland. | Finance |
Hygrove Partners LLC
 Hygrove Partners LLC Investment ManagersFinance Based in New York City, Hygrove Partners LLC is a hedge fund management firm. | Finance |
Anadys Pharmaceuticals, Inc.
 Anadys Pharmaceuticals, Inc. Pharmaceuticals: MajorHealth Technology Anadys Pharmaceuticals, Inc. develops and manufactures novel small molecule medicines. It engages in developing novel medicines in the areas of hepatitis C and oncology. The firm develops ANA598, a direct-acting antiviral for the treatment of hepatitis C. The company was founded by Stelios B. Papadopoulos and Kleanthis G. Xanthopoulos in 1992 and is headquartered in Little Falls, NJ. | Health Technology |
| AQR Funds | Miscellaneous |
| RiverPark Funds Trust | Miscellaneous |
ClearBridge Investments LLC
 ClearBridge Investments LLC Investment ManagersFinance ClearBridge Investments LLC is a SEC-registered investment advisor headquartered in New York City. The firm is a subsidiary of Legg Mason, Inc., ultimately held by Franklin Resources, Inc. (NYSE: BEN). They were founded in 2005 as ClearBridge Advisors, which operated through Citigroup Asset Management NA, and was acquired by Legg Mason that year. They changed their name to ClearBridge Investments LLC in 2012. ClearBridge Investments provides discretionary investment management services for both institutional and retail clients. The firm also acts as adviser or sub-adviser to the ClearBridge Funds which are part of the Legg Mason family of mutual funds. | Finance |
Biogen Idec New Ventures, Inc.
 Biogen Idec New Ventures, Inc. Investment ManagersFinance Founded in 2004, Biogen Idec New Ventures is the corporate venture group of Biogen Idec, Inc. In 2003, Biogen and IDEC Pharmaceuticals merged to create Biogen Idec, Inc. (NASDAQ: BIIB) | Finance |
| Point Rider Group LLC | |
Bioverativ, Inc.
 Bioverativ, Inc. BiotechnologyHealth Technology Bioverativ, Inc. is a global biopharmaceutical company, focused on discovery, research, development and commercialization of therapies for the treatment of blood diseases including hemophilia. The company is headquartered in Cambridge, MA. | Health Technology |
| Northwestern University Clinical & Translational Sciences Inst | |
Biogen GmbH
Biogen GmbH Pharmaceuticals: MajorHealth Technology Part of Biogen, Inc., Biogen GmbH is a pioneer in the field of neuroscience since 1978. The private company is based in Ismaning, Germany. Biogen focuses on research in therapeutic areas with a strong emphasis on difficult-to-treat diseases. The German company was founded in 1978 by Charles Weissman, Kenneth Murray, Heinz Schaller, Phillip Sharp, Walter Gilbert. The CEO is Michel Pericles Vounatsos. | Health Technology |
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