BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q3 2022
Shares 1,748 Value ($000) $467 Avg Close $212.38 Range $193.65 - $283.44
Q2 2022
Shares 2,917 Value ($000) $595 Avg Close $204.43 Range $187.16 - $225.50
Q1 2022
Shares 2,927 Value ($000) $616 Avg Close $217.46 Range $192.67 - $249.00
Q4 2021
Shares 4,039 Value ($000) $969 Avg Close $257.12 Range $221.72 - $290.76
Q3 2021
Shares 296,922 Value ($000) $84,026 Avg Close $327.75 Range $282.64 - $372.12
Q2 2021
Shares 191,842 Value ($000) $66,429 Avg Close $302.94 Range $257.03 - $468.55
Q1 2021
Shares 1,857 Value ($000) $519 Avg Close $269.69 Range $238.40 - $296.38
Q4 2020
Shares 1,813 Value ($000) $444 Avg Close $259.08 Range $223.25 - $363.92
Q3 2020
Shares 1,832 Value ($000) $520 Avg Close $278.91 Range $261.87 - $312.00
Q2 2020
Shares 1,832 Value ($000) $490 Avg Close $300.59 Range $257.60 - $350.24
Q3 2019
Shares 2,414 Value ($000) $562 Avg Close $232.85 Range $215.78 - $246.99
Q2 2019
Shares 2,454 Value ($000) $574 Avg Close $230.90 Range $219.20 - $245.35
Q1 2019
Shares 237,250 Value ($000) $56,081 Avg Close $314.89 Range $216.12 - $344.00
Q4 2018
Shares 241,059 Value ($000) $72,539 Avg Close $319.14 Range $278.46 - $358.41
Q3 2018
Shares 217,301 Value ($000) $76,775 Avg Close $344.30 Range $288.13 - $388.67
Q2 2018
Shares 272,184 Value ($000) $78,999 Avg Close $281.15 Range $249.17 - $310.91
Q1 2018
Shares 299,879 Value ($000) $82,113 Avg Close $310.41 Range $259.76 - $370.57
Q4 2017
Shares 311,849 Value ($000) $99,346 Avg Close $320.80 Range $301.81 - $348.84
Q3 2017
Shares 257,692 Value ($000) $80,689 Avg Close $296.11 Range $269.50 - $330.00
Q2 2017
Shares 320,679 Value ($000) $87,019 Avg Close $264.42 Range $244.28 - $291.90
Q1 2017
Shares 359,107 Value ($000) $98,187 Avg Close $282.75 Range $260.50 - $301.42
Q3 2016
Shares 301,521 Value ($000) $94,385 Avg Close $296.18 Range $240.07 - $333.65
Q2 2016
Shares 245,663 Value ($000) $59,406 Avg Close $263.54 Range $223.02 - $292.69
Q1 2016
Shares 372,468 Value ($000) $96,961 Avg Close $264.15 Range $242.07 - $301.02
Q4 2015
Shares 513,667 Value ($000) $157,362 Avg Close $287.35 Range $254.00 - $311.65
Q3 2015
Shares 690 Value ($000) $201 Avg Close $330.23 Range $265.00 - $412.24
Q2 2015
Shares 724 Value ($000) $292 Avg Close $401.33 Range $368.88 - $432.88
Q1 2015
Shares 320,001 Value ($000) $135,117 Avg Close $394.14 Range $334.40 - $480.18
Q4 2014
Shares 690 Value ($000) $234 Avg Close $323.51 Range $290.85 - $361.93
Q3 2014
Shares 690 Value ($000) $228 Avg Close $329.72 Range $298.31 - $349.00
Q2 2014
Shares 690 Value ($000) $218 Avg Close $300.97 Range $272.02 - $322.25
Q1 2014
Shares 690 Value ($000) $211 Avg Close $317.43 Range $270.62 - $358.89