BIIB

Biogen Inc.
252.73 +0.19% 2026-10-27

Analysts 20 firms · 14 buy · 5 hold · 1 sell · target 259 +2% (175–310)

Last 90d 1 insider sale · 2 congress sales

52-week range
138.00 254.41
1-month+10.5%
3-month+20.8%
1-year+68.6%
3-year-1.8%
5-year-5.7%
vs 50-day+12.3%
vs 200-day+26.3%
Volatility34%
Beta0.27
$ vol/day$302M
ATH480.18
From ATH-47.4%
Next report2026-10-28
WhoEntryMove What they saidWhen
TRACKER - Analyst Ratings long 234.24 +4.2% JP Morgan upgraded BIIB. The move: JP Morgan upgraded BIIB: Neutral to Overweight with a $300 target, on 12 October… Mon, 12 Oct
TRACKER - Analyst Ratings long 210.65 +15.9% Wolfe Research upgraded BIIB, Peer Perform to Outperform with a $300 target, on 13 August 2026. The price shown is… Fri, 14 Aug
TRACKER - Gilbert Cisneros · Congress long 208.46 +17.1% Gilbert Cisneros's trade date was 5 June 2026 — a disclosed purchase of $1,001–$15,000. But a Periodic Transaction… Mon, 06 Jul
TRACKER - Maria Elvira Salazar · Congress long 199.10 +22.6% Maria Elvira Salazar's trade date was 11 May 2026 — a disclosed purchase of $50,001–$100,000. But a Periodic… Tue, 09 Jun
2026AprJulOct

bought sold · bigger dot, bigger trade · follows the chart’s range

WhenPeople SizeValuePrice
3mo sched 1 $239,750 208.99
8mo buy 1 $585 196.83
9mo sched 1 $531,548 192.23
9mo sched 1 $134,116 179.43
1.2y sched 1 $69,045 136.80
1.3y sched 1 $300,105 128.47
1.4y sched 1 $480,508 129.97
1.5y buy 1 $151,559 122.52
1.6y sched 1 $1,314,175 153.62
1.9y sched 1 $17,293 158.25
2.1y sched 1 $88,019 201.69
2.6y sched 1 $19,817 207.03
2.7y sched 1 $57,962 223.50
2.7y sched 1 $23,921 221.20
2.7y buy 1 $101,256 217.97
2.7y sched 1 $100,330 231.14
2.7y sched 1 $155,920 242.87
2.9y sched 1 $27,280 247.50
3.1y sched 1 $116,124 263.99
3.3y sched 1 $22,912 285.72
3.5y sched 1 $804,300 308.57
3.6y sched 1 $25,217 285.78
3.6y sell 1 $153,394 274.51
3.9y sell 1 $1,683,617 286.72
4.0y sell 1 $1,552,832 278.81
5.4y sell 2 $4,733,960 402.82
5.4y sell 1 $98,701 377.27
5.7y buy 1 $239,766 272.86
2026AprJulOct

bought sold · bigger dot, bigger trade · follows the chart’s range

MSMaria Elvira Salazar 3B2S 1mo KHKevin Hern 1S 2mo GCGilbert Cisneros 5B3S 5mo AAAlan Armstrong 1B 7mo RBRob Bresnahan 2B1S 1.5y DGDaniel Goldman 1S 3.7y STShri Thanedar 1S 3.8y KMKathy Manning 1B2S 4.2y JGJosh Gottheimer 5B4S 4.6y PMPeter Meijer 1S 5.7y CJChristopher L. Jacobs 1S 5.8y DPDean Phillips 1B3S 7.1y DSDonna Shalala 1S 7.4y NTNicholas Van Taylor 1S 7.6y +12 more

26 members · 39 buys / 47 sells · $382K–$2.0M disclosed · latest filing Oct 7, 2026 · full tracker ›

WhenMemberSize AmountPrice then
1mo sell MS Maria Elvira Salazar $1K–$15K 226.36
2mo sell KH Kevin Hern $1K–$15K 212.55
5mo buy GC Gilbert Cisneros $1K–$15K 195.34
5mo sell MS Maria Elvira Salazar $15K–$50K 188.83
6mo buy MS Maria Elvira Salazar $1K–$15K 199.36
6mo buy MS Maria Elvira Salazar $1K–$15K 197.95
6mo buy MS Maria Elvira Salazar $50K–$100K 197.95
7mo buy AA Alan Armstrong $1K–$15K 183.84
9mo buy GC Gilbert Cisneros $1K–$15K 179.89
1.5y buy RB Rob Bresnahan $1K–$15K 123.70
1.6y sell RB Rob Bresnahan $1K–$15K 114.05
1.7y buy RB Rob Bresnahan $1K–$15K 143.46
3.7y sell DG Daniel Goldman $1K–$15K 270.25
3.8y sell ST Shri Thanedar $15K–$50K 291.93
4.2y sell KM Kathy Manning $1K–$15K 213.60
4.3y buy KM Kathy Manning $1K–$15K 207.49
4.6y sell JG Josh Gottheimer $1K–$15K 205.32
4.8y sell KM Kathy Manning $1K–$15K 239.30
4.8y buy JG Josh Gottheimer $1K–$15K 235.31
4.9y sell JG Josh Gottheimer $1K–$15K 232.43
5.0y buy JG Josh Gottheimer $1K–$15K 269.73
5.1y sell JG Josh Gottheimer $1K–$15K 299.21
5.4y buy JG Josh Gottheimer $1K–$15K 395.37
5.7y sell PM Peter Meijer $15K–$50K 279.32
5.8y sell CJ Christopher L. Jacobs $1K–$15K 242.95
5.9y sell GC Gilbert Cisneros $1K–$15K 247.87
6.1y buy GC Gilbert Cisneros $1K–$15K 276.39
6.3y buy JG Josh Gottheimer $1K–$15K 268.35
6.5y buy GC Gilbert Cisneros $1K–$15K 304.71
6.6y sell GC Gilbert Cisneros $1K–$15K 298.68
6.7y buy GC Gilbert Cisneros $1K–$15K 338.70
7.1y sell DP Dean Phillips $1K–$15K 235.96
7.2y sell DP Dean Phillips $1K–$15K 233.23
7.4y sell DS Donna Shalala $1K–$15K 235.91
7.4y buy DP Dean Phillips $1K–$15K 234.97
7.5y sell DP Dean Phillips $1K–$15K 225.66
7.5y sell GC Gilbert Cisneros $1K–$15K 228.47
7.6y sell NT Nicholas Van Taylor $1K–$15K 220.26
7.6y sell SW Sheldon Whitehouse $1K–$15K 216.71
8.0y sell JG Josh Gottheimer $1K–$15K 300.96
8.1y sell GP Gary Palmer $1K–$15K 342.08
8.2y buy GP Gary Palmer $1K–$15K 341.17
8.3y buy JG Josh Gottheimer $1K–$15K 372.84
8.5y buy TM Thomas MacArthur $1K–$15K 274.13
8.8y sell SW Sheldon Whitehouse $1K–$15K 329.65
9.6y buy GP Gary Palmer $1K–$15K 274.24
9.6y sell LS Lamar Smith $1K–$15K 268.53
9.8y sell CB Cheri Bustos $15K–$50K 276.06
9.9y sell SW Sheldon Whitehouse $1K–$15K 287.53
9.9y sell SW Sheldon Whitehouse $15K–$50K 287.38
9.9y buy TM Thomas MacArthur $1K–$15K 289.54
10.3y sell JI James M Inhofe $50K–$100K 282.45
10.4y sell EW Ed Whitfield $1K–$15K 290.23
10.6y sell EW Ed Whitfield $1K–$15K 271.73
10.6y sell KC K. Michael Conaway $1K–$15K 260.54
10.7y buy EW Ed Whitfield $1K–$15K 273.27
10.7y sell TM Thomas MacArthur $50K–$100K 266.06
10.8y buy EW Ed Whitfield $1K–$15K 262.10
10.8y buy EW Ed Whitfield $1K–$15K 269.85
11.1y buy TM Thomas MacArthur $1K–$15K 299.06
11.2y buy SW Sheldon Whitehouse $1K–$15K 303.69
11.2y buy LS Lamar Smith $1K–$15K 304.49
11.2y sell RH Rubén Hinojosa $1K–$15K 295.64
11.2y buy SW Sheldon Whitehouse $1K–$15K 314.94
11.2y buy SW Sheldon Whitehouse $1K–$15K 330.38
11.3y sell AL Alan S. Lowenthal $1K–$15K 385.05
11.3y buy SW Sheldon Whitehouse $1K–$15K 388.23
11.3y buy JI James M Inhofe $15K–$50K 399.29
11.5y buy SW Sheldon Whitehouse $15K–$50K 383.29
11.5y buy AL Alan S. Lowenthal $15K–$50K 430.96
11.6y buy SW Sheldon Whitehouse $1K–$15K 418.09
11.7y buy KC K. Michael Conaway $1K–$15K 396.88
11.7y sell TM Thomas MacArthur $15K–$50K 391.12
11.9y buy KC K. Michael Conaway $1K–$15K 328.27
12.3y sell SC Susan M Collins $1K–$15K 337.60
12.4y sell LF Lois Frankel $1K–$15K 309.78
12.6y sell SC Susan M Collins $1K–$15K 309.76
12.7y sell RH Rubén Hinojosa $1K–$15K 343.86
12.8y buy RH Rubén Hinojosa $1K–$15K 303.60
12.8y sell KC K. Michael Conaway $1K–$15K 283.67
12.8y sell RH Rubén Hinojosa $1K–$15K 279.57
12.8y buy SC Susan M Collins $1K–$15K 277.17
12.9y sell RH Rubén Hinojosa $1K–$15K 283.34
13.2y sell SC Susan M Collins $1K–$15K 211.25
13.4y sell SC Susan M Collins $1K–$15K 214.10
13.4y sell SC Susan M Collins $1K–$15K 219.74

Next report 2026-10-28 (Wednesday, before open, in 0 days) · EPS estimate 1.99. It has finished the next session higher 57% of the time, average move 3.9%.

Day-after move, last 12 reports, oldest left.

ReportedEst.Actual SurpriseGapDay 1Day 5
2026-07-29 beat 2.03 3.60 +77.4% +2.4% +1.8% +0.5%
2026-04-29 beat 2.95 3.57 +20.9% -0.1% +6.0% +4.0%
2026-02-06 beat 1.62 1.99 +23.2% +0.9% +8.5% +6.0%
2025-10-30 beat 3.88 4.81 +23.9% -5.2% +1.2% +6.0%
2025-07-31 beat 3.88 5.47 +41.0% +5.0% +1.1% +0.9%
2025-05-01 beat 2.95 3.02 +2.4% -0.6% -0.1% -2.2%
2025-02-12 beat 3.36 3.44 +2.3% -1.9% -4.3% -1.7%
2024-10-30 beat 3.79 4.08 +7.8% +0.6% -1.2% -4.9%
2024-08-01 beat 4.03 5.28 +31.0% +1.2% -1.2% -4.3%
2024-04-24 beat 3.46 3.67 +6.0% +3.0% +4.6% +11.9%
2024-02-13 miss 3.18 2.95 -7.2% -3.7% -7.4% -9.7%
2023-11-08 beat 3.98 4.36 +9.4% +0.0% -5.7% -6.5%
2023-07-25 beat 3.76 4.02 +6.9% +1.0% -2.4% -2.8%
2023-04-25 beat 3.28 3.40 +3.5% -0.7% -3.6% +5.5%
2023-02-15 beat 3.48 4.05 +16.2% -0.4% -3.5% -5.9%
2022-10-25 beat 4.13 4.77 +15.5% +1.4% -0.4% +2.0%
2022-07-20 beat 4.07 5.25 +29.0% -1.5% -5.8% -3.3%
2022-05-03 miss 4.36 3.62 -17.0% +0.9% -0.8% -5.9%
2022-02-03 beat 3.37 3.39 +0.6% -4.4% -2.1% -2.2%
2021-10-20 beat 4.10 4.77 +16.5% +0.7% -0.6% -3.1%
2021-07-22 beat 4.60 5.68 +23.5% -0.9% +1.1% +1.9%
2021-04-22 beat 4.94 5.34 +8.1% -3.7% -4.0% -1.7%
2021-02-03 miss 4.80 4.58 -4.5% -2.8% -5.2% -1.0%
2020-10-21 beat 8.05 8.84 +9.8% -0.8% +0.7% -8.6%
2020-07-22 beat 8.00 10.26 +28.2% +1.8% +0.2% -1.0%
2020-04-22 beat 7.69 9.14 +18.9% -8.0% -9.4% -7.4%
2020-01-30 beat 8.08 8.34 +3.3% +2.0% -1.8% +19.4%
2019-10-22 beat 8.27 9.17 +10.8% +38.7% +26.1% +33.1%
2019-07-23 beat 7.53 9.15 +21.4% +2.8% +4.9% +3.9%
2019-04-24 beat 6.96 6.98 +0.3% +0.8% -2.5% -0.3%
2019-01-29 beat 6.72 6.99 +4.0% -0.9% +1.4% +2.1%
2018-10-23 beat 6.76 7.40 +9.4% -0.2% +0.2% -2.9%
2018-07-24 beat 5.14 5.80 +12.7% +6.1% +4.1% -6.6%
2018-04-24 beat 5.94 6.05 +1.9% -2.2% +1.1% +5.9%
2018-01-25 miss 5.45 5.26 -3.5% +3.3% +2.1% -0.1%
2017-10-24 beat 5.72 6.31 +10.3% -2.9% -3.9% -5.1%
2017-07-25 beat 4.37 5.04 +15.3% +1.9% -0.6% +2.3%
2017-04-25 beat 4.97 5.20 +4.5% +4.7% +3.6% -2.0%
2017-01-26 beat 4.96 5.04 +1.6% +1.7% +2.1% -3.3%
2016-10-26 beat 4.97 5.19 +4.4% +3.1% +3.7% -3.1%
2016-07-21 beat 4.69 5.21 +11.2% +6.6% +7.6% +10.1%
2016-04-21 beat 4.47 4.79 +7.2% +1.1% +5.2% +5.7%
2016-01-27 beat 4.08 4.50 +10.3% +5.8% +5.2% +4.1%
2015-10-21 beat 3.81 4.48 +17.6% +7.2% +4.0% +10.5%
2015-07-24 beat 4.09 4.22 +3.1% -15.1% -22.1% -17.2%
2015-04-24 miss 3.90 3.82 -2.0% -4.7% -6.6% -10.2%
2015-01-29 beat 3.77 4.09 +8.4% +5.5% +10.2% +13.8%
2014-10-22 beat 3.46 3.80 +9.8% -8.2% -5.4% -3.6%
2014-07-23 beat 2.84 3.49 +22.8% +10.3% +11.2% +13.5%
2014-04-23 miss 2.55 2.47 -3.3% +0.9% +0.2% -6.2%
2014-01-29 beat 2.27 2.34 +3.0% -2.2% -0.1% -1.9%
2013-10-28 beat 2.11 2.35 +11.5% -0.7% +0.9% -4.8%
2013-07-25 beat 1.95 2.30 +17.7% +3.1% +0.4% -2.8%
2013-04-25 beat 1.63 1.97 +21.1% +2.9% +4.8% +5.4%
2013-01-28 miss 1.46 1.40 -4.0% +2.4% +2.6% +6.5%
2012-10-25 beat 1.60 1.91 +19.4% +2.1% +1.7% -1.7%
2012-07-24 beat 1.57 1.82 +16.2% +2.4% +0.2% +4.7%
2012-05-01 miss 1.48 1.40 -5.6% -1.8% -1.6% -0.8%
2012-01-31 beat 1.49 1.51 +1.4% -0.5% +1.2% +4.3%
2011-10-28 beat 1.53 1.61 +5.5% +0.0% +0.8% -3.6%

20 firms covering, 40 actions in the last 180 days (ratings, reiterations and target changes) · average price target 259 from 20 firms, range 175–310.

DateFirmActionRating TargetFrom
2026-10-29 RBC Capital main Outperform 272 256
2026-10-29 Morgan Stanley main Equal-Weight 238 231
2026-10-29 UBS main Buy 300 270
2026-10-29 TD Cowen main Buy 260 250
2026-10-29 Wedbush main Neutral 225 212
2026-10-29 Truist Securities reit Buy 260 235
2026-10-29 Baird main Outperform 290 250
2026-10-29 Needham main Buy 290 256
2026-10-28 Barclays main Equal-Weight 230 200
2026-10-22 B of A Securities main Neutral 244 219
2026-10-21 TD Cowen main Buy 250 225
2026-10-20 Wells Fargo main Overweight 310 250
2026-10-12 JP Morgan up Overweight 300 210
2026-10-09 UBS main Buy 270 240
2026-10-08 RBC Capital main Outperform 256 260
2026-09-10 HSBC main Reduce 175 165
2026-09-03 Piper Sandler reit Overweight 245 225
2026-08-25 RBC Capital main Outperform 260 240
2026-08-13 Wolfe Research up Outperform 300 —
2026-08-04 Mizuho main Outperform 241 221
2026-08-03 Citigroup main Neutral 215 200
2026-07-30 UBS main Buy 240 225
2026-07-30 HC Wainwright & Co. main Buy 251 237
2026-07-30 Morgan Stanley main Equal-Weight 231 222
2026-07-30 RBC Capital main Outperform 240 242
2026-07-30 Canaccord Genuity main Buy 248 245
2026-07-30 TD Cowen main Buy 225 215
2026-07-30 Wedbush main Neutral 215 201
2026-07-29 Barclays main Equal-Weight 200 185
2026-07-21 Guggenheim main Buy 280 260
2026-07-21 B of A Securities main Neutral 215 217
2026-07-13 Truist Securities up Buy 235 190
2026-07-08 Morgan Stanley main Equal-Weight 222 224
2026-07-07 RBC Capital main Outperform 242 227
2026-06-29 Needham main Buy 256 255
2026-06-18 Morgan Stanley main Equal-Weight 224 206
2026-06-15 Mizuho main Outperform 221 236
2026-06-08 Needham up Buy 255 —
2026-05-27 RBC Capital main Outperform 227 222
2026-05-15 Piper Sandler reit Overweight 225 214
Model view — historical tendencies for the days ahead, not a forecast
Next 1 day
-0.2%
Next 1 week
-0.1%
Next 1 month
+0.7%
Seasonality
Bullish window historically
Next 30 days (to Nov 27): +4.0% median, 59% of the last 34 years finished up.
20-year seasonality chart →
Mean reversion
Neutral — RSI(2) at 77
RSI(2) under 15 is oversold (this name has historically bounced); over 85 is overbought. Its dip-buy edge in history is -0.17%/day.
Mean-reversion stats →
1-month breakdown — Market · β 0.27 +0.7% · Seasonal tilt -0.0%
$36.8B market cap (#452 US) $302M/day volume 34% volatility +69% 1-year -47% from ATH
52-week range · 99% of the way up · -1% from the high
$138.00$254.41

Not investment advice.