BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Holocene Advisors, LP's Holding History (CIK: 0001700574)

Note: Option positions (PUT/CALL) are excluded.

Q3 2025

Shares 5,979 Value ($000) $838 Avg Close $135.17 Range $121.05 - $150.28

Q2 2023

Shares 3,791 Value ($000) $1,080 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 194,105 Value ($000) $53,967 Avg Close $276.70 Range $254.80 - $295.90

Q2 2021

Shares 1,370 Value ($000) $474 Avg Close $302.94 Range $257.03 - $468.55

Q1 2020

Shares 227,469 Value ($000) $71,967 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 249,942 Value ($000) $74,165 Avg Close $277.46 Range $219.70 - $318.00

Q1 2018

Shares 926 Value ($000) $254 Avg Close $310.41 Range $259.76 - $370.57

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	5,979	$838	$135.17	$121.05 - $150.28
Q2 2023	3,791	$1,080	$297.86	$273.39 - $319.76
Q1 2023	194,105	$53,967	$276.70	$254.80 - $295.90
Q2 2021	1,370	$474	$302.94	$257.03 - $468.55
Q1 2020	227,469	$71,967	$303.47	$262.25 - $374.99
Q4 2019	249,942	$74,165	$277.46	$219.70 - $318.00
Q1 2018	926	$254	$310.41	$259.76 - $370.57