Historical shareholding details of BlackRock Health Sciences Opps Port holdings in Biogen Inc (BIIB)

Monthly changes of BlackRock Health Sciences Opps Port shareholding in Biogen Inc over the previous months

Month	Name	Total no. shares held	Percent Holding
Month	Name	Total no. shares held	Percent Holding
Feb 28, 2025	Blackrock Health Sciences Opps Port	430,448	0.29%

Jan 31, 2025	Blackrock Health Sciences Opps Port	430,448	0.29%

Dec 31, 2024	Blackrock Health Sciences Opps Port	450,623	0.31%

Nov 30, 2024	Blackrock Health Sciences Opps Port	450,623	0.31%

Oct 31, 2024	Blackrock Health Sciences Opps Port	450,623	0.31%

Sep 30, 2024	Blackrock Health Sciences Opps Port	581,498	0.40%

Aug 31, 2024	Blackrock Health Sciences Opps Port	581,498	0.40%

Jul 31, 2024	Blackrock Health Sciences Opps Port	581,498	0.40%

Jun 30, 2024	Blackrock Health Sciences Opps Port	581,498	0.40%

May 31, 2024	Blackrock Health Sciences Opps Port	596,508	0.41%

Apr 30, 2024	Blackrock Health Sciences Opps Port	596,508	0.41%

Mar 31, 2024	Blackrock Health Sciences Opps Port	596,508	0.41%

Feb 29, 2024	Blackrock Health Sciences Opps Port	596,508	0.41%

Jan 31, 2024	Blackrock Health Sciences Opps Port	596,508	0.41%

Dec 31, 2023	Blackrock Health Sciences Opps Port	596,508	0.41%

Nov 30, 2023	Blackrock Health Sciences Opps Port	596,508	0.41%

Oct 31, 2023	Blackrock Health Sciences Opps Port	584,823	0.40%

Sep 30, 2023	Blackrock Health Sciences Opps Port	584,823	0.40%

Aug 31, 2023	Blackrock Health Sciences Opps Port	584,823	0.40%

Jul 31, 2023	Blackrock Health Sciences Opps Port	570,173	0.39%

Jun 30, 2023	Blackrock Health Sciences Opps Port	570,173	0.39%

May 31, 2023	Blackrock Health Sciences Opps Port	570,173	0.39%

Apr 30, 2023	Blackrock Health Sciences Opps Port	380,393	0.26%