Brian Posner

Currently holds positions in Biogen Inc and Arch Capital Group Ltd

Position	Company	Period
Independent Director	Biogen Inc	July 23, 2008 -
Independent Director	Arch Capital Group Ltd	Nov. 4, 2010 -
Independent Chairman of the Board	Bioverativ Inc	Jan. 1, 2017 - March 8, 2018

• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Earnings

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Abbreviations B: Buy, S: Sell, PP: Planned purchase, PS: Planned sale, O: Option / Other

Notification date	Transaction date	B/S Transaction type	Nb. shares Price Value	Number of shares	Price	Value	Details
2022-11-01	2022-10-28	Arch Capital Group Ltd (ACGL)	B Purchase	2,000 +100.0% 17.60 USD 35,200	2,000 +100.0%	17.60	USD 35,200
2022-05-02	2022-04-29	Arch Capital Group Ltd (ACGL)	B Purchase	2,000 +inf% 19.23 USD 38,450	2,000 +inf%	19.23	USD 38,450
2021-06-15	2021-06-14	Arch Capital Group Ltd (ACGL)	S Sale	4,000 -66.7% 25.24 USD 100,971	4,000 -66.7%	25.24	USD 100,971
2021-06-07	2021-06-04	Biogen Inc (BIIB)	PS Planned sale	360 -4.6% 274.17 USD 98,701	360 -4.6%	274.17	USD 98,701
2020-05-15	2020-05-13	Arch Capital Group Ltd (ACGL)	B Purchase	1,000 +1.0% 22.16 USD 22,159	1,000 +1.0%	22.16	USD 22,159
2020-05-08	2020-05-06	Arch Capital Group Ltd (ACGL)	B Purchase	1,000 +1.1% 23.72 USD 23,718	1,000 +1.1%	23.72	USD 23,718