Insider trading

Period: 120 months Stock: TNDM Role: CEO × + Add filter Clear all
Views & alerts

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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.

16 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.

16 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.

16 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.

16 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.
16 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
16 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.

16 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
11 Aug 2025
Sheridan John F PRESIDENT & CEO
Bought
$102.32K 10,000 at 10.23
10.4%
First buy in 3+ yrs
9 May 2022
Sheridan John F PRESIDENT & CEO
Bought
$174.75K 2,500 at 69.90
33.1%
First buy on file
9 Aug 2021
Sheridan John F PRESIDENT & CEO
Sold, plan not stated 2×
$1.03M 9,603 at 107.65
60.8%
Sold half or more
6 Aug 2021
Sheridan John F PRESIDENT & CEO
Sold, plan not stated 2×
$578.85K 5,323 at 108.75
46.2%
13 Oct 2020
Sheridan John F PRESIDENT & CEO
Sold, plan not stated 3×
$1.82M 15,000 at 121.31
80.0%
Sold half or more
16 Sep 2020
Sheridan John F PRESIDENT & CEO
Sold, plan not stated
$44.26K 401 at 110.37
9.6%
15 Sep 2020
Sheridan John F PRESIDENT & CEO
Sold, plan not stated
$1.06M 9,599 at 110.00
71.9%
Sold half or more
3 Aug 2020
Sheridan John F PRESIDENT & CEO
Sold, plan not stated 2×
$3.39M 33,200 at 102.21
89.8%
Sold half or more
21 Feb 2020
Sheridan John F PRESIDENT & CEO
Sold, plan not stated 3×
$2.64M 30,000 at 87.86
92.3%
Sold half or more
25 Nov 2019
Sheridan John F PRESIDENT & CEO
Sold, plan not stated
$32.34K 462 at 70.00
15.6%
6 Sep 2019
Sheridan John F PRESIDENT & CEO
Sold, plan not stated
$667.95K 9,538 at 70.03
79.2%
Sold half or more
7 Nov 2018
BLICKENSTAFF KIM D PRESIDENT & CEO · indirect
Sold, plan not stated
$6.61M 178,730 at 37.01
13.0%
6 Nov 2018
BLICKENSTAFF KIM D PRESIDENT & CEO · indirect
Sold, plan not stated
$712.99K 19,270 at 37.00
1.4%
9 Feb 2018
BLICKENSTAFF KIM D PRESIDENT & CEO · indirect
Bought
$1.50M 750,000 at 2.00
154%
First buy on file
13 Oct 2017
BLICKENSTAFF KIM D PRESIDENT & CEO · indirect
Bought
$999.95K 285,700 at 3.50
142%
First buy on file
23 Mar 2017
BLICKENSTAFF KIM D PRESIDENT & CEO
Bought
$2.00M 1,600,000 at 1.25
392%
First buy on file
Showing 1–16 of 16.