Insider trading

Period: 120 months Stock: BIIB Role: Directors × + Add filter Clear all
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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

23 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

23 decisions over 120 months Remove this filter
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

23 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

23 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
23 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
23 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

23 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
4 Aug 2026
Minor Lloyd Director
Sold on a plan
$119.17K 593 at 200.96
18.1%
Planned (10b5-1)
3 Aug 2026
Minor Lloyd Director
Sold on a plan
$120.58K 593 at 203.34
15.3%
Planned (10b5-1)
2 May 2025
DORSA CAROLINE Director
Bought
$151.56K 1,235 at 122.72
4.6%
First buy on file
7 Mar 2025
Sold on a plan
$1.31M 8,760 at 150.02
43.6%
Planned (10b5-1)
15 Feb 2024
Rowinsky Eric K Director
Bought
$101.26K 455 at 222.54
2.3%
First buy on file
4 Jun 2021
Posner Brian S Director
Sold, plan not stated
$98.70K 360 at 274.17
4.6%
9 Feb 2021
Mantas Jesus B Director
Bought
$239.77K 898 at 267.00
43.9%
First buy on file
11 Mar 2020
Sold, plan not stated 2×
$718.57K 2,434 at 295.22
14.5%
2 Dec 2019
Posner Brian S Director
Sold, plan not stated
$308.43K 1,055 at 292.35
13.1%
2 May 2019
DENNER ALEXANDER J Director · indirect
Bought
$8.79M 38,000 at 231.24
6.3%
First buy on file
1 May 2019
DENNER ALEXANDER J Director · indirect
Bought
$6.88M 30,000 at 229.46
5.2%
First buy on file
30 Apr 2019
DENNER ALEXANDER J Director · indirect
Bought
$11.54M 50,342 at 229.25
9.6%
First buy on file
18 Mar 2019
PANGIA ROBERT W Director
Sold, plan not stated
$2.01M 6,114 at 328.55
24.8%
1 Feb 2019
DENNER ALEXANDER J Director · indirect
Bought
$2.30M 7,000 at 328.45
1.4%
First buy on file
31 Jan 2019
DENNER ALEXANDER J Director · indirect
Bought
$8.53M 25,800 at 330.52
5.2%
First buy on file
30 Jan 2019
DENNER ALEXANDER J Director · indirect
Bought
$9.75M 30,000 at 324.86
6.5%
First buy on file
25 Apr 2018
DENNER ALEXANDER J Director · indirect
Bought
$12.96M 48,000 at 269.91
11.6%
First buy on file
9 Jan 2018
PANGIA ROBERT W Director
Sold, plan not stated
$1.92M 5,832 at 329.65
24.8%
29 Nov 2017
DENNER ALEXANDER J Director · indirect
Bought
$3.20M 10,000 at 319.84
2.5%
First buy on file
28 Nov 2017
DENNER ALEXANDER J Director · indirect
Bought
$6.32M 20,000 at 316.12
5.2%
First buy on file
9 Jun 2017
Posner Brian S Director
Sold, plan not stated
$277.84K 1,084 at 256.31
14.6%
27 Apr 2017
DENNER ALEXANDER J Director · indirect
Bought 2×
$20.57M 73,858 at 278.50
23.8%
First buy on file
9 Jan 2017
PANGIA ROBERT W Director
Sold, plan not stated
$1.61M 5,450 at 295.39
24.7%
Showing 1–23 of 23.