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BIIB · Biogen Inc.

Track BIIB — free
$209.83 -0.82 (-0.39%) At close · Aug 14
Market Cap
$30.98B
Shares
147.64M

Options Chain

Underlying $209.83 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 100 contracts · mixed snapshot sessions · Jun 24, 2026–Aug 14, 2026; 43 unknown
Put / call OI
dated and unknown snapshot sessions
Open interest
dated and unknown snapshot sessions
Volume
dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator
OI Vol IV Δ Last Strike Last Δ IV Vol OI
0 0.1% 1 $0.25 2 2
0 0.1% 1 $0.11 4 0
1 1 195.8% 0.998 $90.90 $1.23 10 10
0 198.2% 0.995 $1.23 10 10
0 168.2% 0.998 0
0 171.5% 0.995 0
0 -0.02 201.9% 0
0 -0.041 223.1% 0
0 0.1% 1 -0.022 173.1% 0
0 -0.05 198.1% 0
1 1 0.1% 1 $62.90 $0.64 -0.03 152.7% 1 1
0 0.1% 1 $1.52 -0.044 151.7% 1 1
1 1 $44.10 -0.056 148.6% 0
2 2 0.1% 1 $45.78 $1.23 -0.034 111.5% 1 4
476 412 $40.16 $1.33 -0.071 122.9% 1 15
291 1 69.6% 0.985 $34.10 $0.25 -0.058 98.5% 5 22
7 2 54.9% 0.99 $25.85 $0.80 -0.048 77% 10 31
0 50.5% 0.99 -0.064 77.9% 0
1 2 50.3% 0.981 $28.10 $0.05 -0.03 56.1% 12 122
0 49.6% 0.972 $4.04 -0.042 53.9% 1 1
13 1 44.4% 0.969 $20.34 $0.10 -0.019 39.5% 12 538
0 39.3% 0.966 $1.25 -0.091 53.8% 1 1
11 11 28% 0.985 $15.20 $0.72 -0.096 46.7% 7 85
3 3 43.5% 0.88 $12.22 -0.126 44.8% 0
45 4 27.5% 0.928 $11.26 $0.71 -0.166 41.6% 48 83
4 2 33% 0.818 $5.50 $0.80 -0.204 36.6% 30 245
27 1 27.3% 0.768 $6.80 $1.45 -0.294 37.3% 14 9
34 4 32.1% 0.627 $4.59 $2.22 -0.385 35.4% 13 13
213 6 40.4% 0.511 $3.35 $3.14 -0.494 28.2% 1 38
22 11 34.5% 0.4 $2.25 $5.02 -0.599 35.3% 1 10
35 13 34.5% 0.3 $1.40 -0.696 35.6% 0
10 1 29.2% 0.172 $1.50 -0.783 35.4% 0
516 67 45.9% 0.216 $0.70 $27.18 -0.839 37.4% 5 10
11 1 38.4% 0.118 $1.22 -0.931 32.2% 0
40 3 42.4% 0.1 $0.52 -0.959 32.9% 0
3 1 46.4% 0.086 $3.50 -0.953 39.1% 0
179 4 44.2% 0.051 $0.30 $25.80 -0.966 41.3% 1 1
20 28 64.4% 0.109 $1.72 -0.997 35.4% 0
15 19 63.1% 0.079 $1.90 -0.971 49.4% 0
245 1 66.6% 0.058 $0.38 $34.50 -0.974 56.4% 7 4
1 1 74.5% 0.052 $0.55 -0.977 63.3% 0
19 2 73.9% 0.03 $0.15 -0.998 56.8% 0
1 1 89.8% 0.045 $0.16 -0.987 72.6% 0
7 14 97.2% 0.042 $0.58 -0.988 79.1% 0
0 128.3% 0.08 -0.999 73.9% 0
8 4 111.6% 0.038 $0.48 0
0 118.3% 0.036 0
0 124.2% 0.035 0
0 135.5% 0.032 0
4 2 146.5% 0.03 $0.23 0
About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jun 24, 2026–Aug 14, 2026; 43 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. The 25 strikes around the money are shown by default — switch to "All 50" for the wings.

Key facts CIK 875045 CUSIP 09062X103 13F (30d) 947 filings 910 filers Visit website Investor relations